Abstract
A lightweight, portable leg strengthening apparatus includes a footplate and calf support which form a leg rest, a top a friction free sliding element running longitudinally along and supported on a rectangular base. The leg rest is hinged at its attachment to the sliding element to allow a longitudinal tilting movement. The leg rest has adjustability at the hinge point at the ankle to enable alterations in the foot position. The apparatus uses resistance material/rubber cords or springs attached via a plate to a steel cable, travelling via an aperture in the end of the device to the back of the sliding element a top the body of the device to create tension as the leg rest a top the sliding element is moved longitudinally along the body of the device. Resistance can be varied and progressed by using different numbers of resistance cords/springs.
Claims
1. A portable therapeutic leg strengthening apparatus comprising: a longitudinal body having first and second ends; a guide member moveable between said first and second ends in a direction parallel to a main length of said longitudinal body; a footplate pivotally connected to said guide member; a calf support adjustably connected to said footplate; one or a plurality of resiliently biased members connected to said guide member for generating a resistance to movement of the guide member relative to the longitudinal body; and a connector for connecting said one or plurality of resiliently biased members to said longitudinal body, wherein the connector is a cable; said one or plurality of resiliently biased members providing variable resistance to said connector to increase or decrease a force required by a user to move said guide member between said first and second ends of said longitudinal body; wherein an angle of connection between the footplate and the calf support is adjustable; and wherein said footplate and said calf support form a leg rest, configurable between first and second configurations, such that: in said first configuration the leg rest is arranged such that the guide member is pushed against the resistance generated by said one or plurality of resiliently biased members between said first and second ends of the longitudinal body to exercise quadriceps of the user and in said second configuration the guide member is pulled against the resistance generated by said one or plurality of resiliently biased members between said first and second ends of the longitudinal body to exercise a hamstring of the user.
2. The apparatus according to claim 1, further comprising a bed end stop to stabilize the apparatus in use on a bed.
3. The apparatus according to claim 2, wherein the bed end stop comprises two elongate support rods.
4. The apparatus according to claim 3, wherein the bed end stop further comprises a bridging piece between said two elongate support rods.
5. The apparatus according to claim 1 wherein the extension of the one or plurality of resiliently biased members is regulated by a block and tackle mechanism.
6. The apparatus according to claim 5 wherein the block and tackle mechanism comprises three pulleys.
7. The apparatus according to claim 1, wherein said one or plurality of resiliently biased members are one or a plurality of springs.
8. The apparatus according to claim 7, further comprising a stop to engage said one or plurality of springs and said connector.
9. The apparatus according to claim 1, wherein the footplate and calf support each further comprise a removable liner.
10. The apparatus according to claim 9, wherein said removable liners are magnetically aligned with the footplate and the calf support.
11. The apparatus according to claim 1, wherein said guide member is rotatable by 180° relative to the longitudinal body about a pivot point.
12. The apparatus according to claim 1, wherein the apparatus further comprises a removable heel support locatable within said footplate, configurable between first and second positions such that: in a first position the heel support is arranged such that the user exerts pressure through a ball of a foot of the user to move the guide member between the first and second ends of the longitudinal body and in a second position the heel support is arranged so that the user exerts pressure through a heel of the foot of the user to move the guide member between the first and second ends of the longitudinal body.
13. The apparatus according to claim 1, wherein said one or plurality of resiliently biased members are elastic or rubber cords.
14. A portable therapeutic leg strengthening apparatus comprising: a longitudinal body having first and second ends; a guide member moveable between said first and second ends in a direction parallel to a main length of said longitudinal body; a footplate pivotally connected to said guide member; a calf support adjustably connected to said footplate; one or a plurality of resiliently biased members connected to said guide member for generating a resistance to movement of the guide member relative to the longitudinal body; and a connector for connecting said one or plurality of resiliently biased members to said longitudinal body, wherein the connector comprises a cable; said one or plurality of resiliently biased members providing variable resistance to said connector to increase or decrease a force required by a user to move said guide member between said first and second ends of said longitudinal body; wherein an angle of connection between the footplate and the calf support is adjustable; and wherein said footplate and said calf support form a leg rest, rotatable between first and second configurations, such that: in said first configuration the leg rest is arranged such that the guide member is pushed against the resistance generated by said one or plurality of resiliently biased members between said first and second ends of the longitudinal body to exercise quadriceps of the user and in said second configuration the guide member is pulled against the resistance generated by said one or plurality of resiliently biased members between said first and second ends of the longitudinal body to exercise a hamstring of the user.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
(1) For a better understanding of the invention and to show how the same may be carried into effect, there will now be described by way of example only, specific embodiments, methods and processes according to the present invention with reference to the accompanying drawings in which:
(2) FIG. 1 is a side view of a first embodiment of the present invention.
(3) FIG. 2 is a perspective view of a first embodiment of the present invention in chair configuration.
(4) FIG. 3 is a side view of the foot and calf support of a first embodiment of the present invention.
(5) FIG. 4 is a partial perspective rear view of a first embodiment of the present invention in chair configuration.
(6) FIG. 5 is a side view of a first embodiment of the present invention in use in a bed configuration.
(7) FIG. 6 is a perspective view of a first embodiment of the present invention in use in a bed configuration.
(8) FIG. 7 is a perspective view of a second embodiment of the present invention.
(9) FIG. 8 is a partial cross section of a side view of a second embodiment of the present invention.
(10) FIG. 9 is a partial cross section of a partial perspective view of a second embodiment of the present invention.
(11) FIG. 10 is a vertical cross section of the organ stops according to a second embodiment of present invention.
(12) FIG. 11 is a representative illustration of the folding nature of the device in accordance with a second embodiment of the present invention.
(13) FIG. 12 is a representative illustration of the portable nature of the device in accordance with a second embodiment of the present invention.
(14) FIG. 13 is a perspective view of a device in accordance with a second embodiment of the present invention in use on a bed.
(15) FIG. 14 is a side illustration of a device in accordance with a second embodiment of the present invention in use on a bed.
(16) FIG. 15 is a representative perspective illustration of a single device in accordance with a second embodiment of the present invention for use by a seated individual.
(17) FIG. 16 is a representative perspective illustration of two conjoined devices in accordance with a second embodiment of the present invention for use by a seated individual.
(18) FIG. 17 is a perspective view of a third embodiment of the present invention.
(19) FIG. 18 is a partial cross section of a partial perspective view of the device in accordance with a third embodiment of the present invention.
(20) FIGS. 19a-c illustrate the organ stop feature in accordance with the third embodiment of the invention.
(21) FIG. 20 is a partial cross section of a side view according to a third embodiment of the present invention.
(22) FIG. 21 is a perspective view of a device in accordance with a third embodiment of the present invention in use on a bed.
(23) FIG. 22 is a side illustration of a device in accordance with a third embodiment of the present invention in use on a bed.
(24) FIG. 23 is a representative illustration of the folding nature of the device in accordance with a third embodiment of the present invention.
(25) FIG. 24 is a representative illustration of the portable nature of the device in accordance with a third embodiment of the present invention.
(26) FIGS. 25a and b are perspective illustrations of a single device in accordance with a third embodiment of the present invention for use by a seated individual.
(27) FIG. 25c is a perspective illustration of two conjoined devices in accordance with a third embodiment of the present invention for use by a seated individual.
(28) FIG. 26a is a side cross sectional view of a device in accordance with the fourth embodiment of the invention, showing a heel support in situ.
(29) FIG. 27a is a side cross sectional view of a device in accordance with the fourth embodiment of the invention, showing a heel support in stowed location such that a user does not exert pressure through their heel when using the device.
(30) FIGS. 26b and 27b show the heel support in accordance with the configurations shown in FIGS. 26a and 27a.
(31) FIG. 28a is a perspective view of a device in accordance with the fourth embodiment of the invention, for use by a seated individual to exercise their quadriceps.
(32) FIGS. 28b and 28c are partial perspective views of a device in accordance with the fourth embodiment of the invention, for use by a seated individual, showing the rotability of the foot rest in an first (FIG. 28a), intermediate (FIG. 28b) and second configuration (FIG. 28c).
(33) FIGS. 29a and 29b are a perspective and partial cutaway perspective view of a device in accordance with the fourth embodiment of the invention. The device is shown in configuration for use by a seated individual to exercise their hamstrings.
(34) FIG. 30 shows a close up illustration of the resistance component in accordance with the fourth embodiment of the present invention.
(35) FIG. 31 shows an illustration of the leg rest component in accordance with the fourth embodiment of the present invention,
(36) FIG. 32 shows an illustration of a housing component of the device in accordance with the fourth embodiment of the invention.
(37) FIGS. 33a and 33b are a partial cutaway front view of a device in accordance with the fourth embodiment of the invention. FIGS. 33a and 33b show the device in quadriceps configuration.
(38) FIGS. 34a and 34b are side views of a device in accordance with the fourth embodiment of the invention for use on a bed with legs beneath the device. FIGS. 34a and 34b show the device in quadriceps configuration.
(39) FIGS. 35a and 35b are cutaway side views of a device in accordance with the fourth embodiment of the invention for use on a bed with legs beneath the device. FIGS. 35a and 35b shows the device in quadriceps configuration.
(40) FIG. 36 is a partial perspective view of the device in accordance with the fourth embodiment of the invention for by a seated individual. The leg rest is shown in an intermediate position between the respective positions for a user exercising their quadriceps or hamstrings.
(41) FIGS. 37a and 37b are perspective views of a device in accordance with the fourth embodiment of the invention for use on a bed with legs beneath the device. FIGS. 37a and 37b show the device in quadriceps configuration.
(42) FIGS. 38a and 38b are plan views of a device in accordance with the fourth embodiment of the invention for use on a bed with legs beneath the device. FIGS. 38a and 38b show the device in quadriceps configuration.
(43) FIGS. 39a and 39b are rear perspective views of a device in accordance with the fourth embodiment of the invention. Securing straps are shown at both ends of the device the three possible positions of the moveable legs are all illustrated. FIGS. 39a and 39b show the device in quadriceps configuration.
(44) FIGS. 40a, 40b, 40c. 40d, 40e and 40f show various views of a device in accordance with the fourth embodiment of the invention for use on a bed with legs beneath the device and the bed end stop extended. The device is configured for exercising the quadriceps. FIGS. 40 a and 40f are end views, FIG. 40b is a plan view, FIG. 40c is a side view, FIG. 40d a rear view and FIG. 40e a perspective view.
(45) FIG. 41 is a side view of a device in accordance with the fourth embodiment in hamstring configuration for use on a bed with legs beneath the device.
(46) FIG. 42 is a side view of a device in accordance with the fourth embodiment in hamstring configuration for use by a seated individual with legs extending from the device.
DETAILED DESCRIPTION OF THE EMBODIMENTS
(47) There will now be described by way of example a specific mode contemplated by the inventors. In the following description numerous specific details are set forth in order to provide a thorough understanding. It will be apparent however, to one skilled in the art, that the present invention may be practiced without limitation to these specific details. In other instances, well known methods and structures have not been described in detail so as not to unnecessarily obscure the description.
(48) The present invention is to be used for strengthening the leg muscles, specifically the quadriceps and can be used whilst sitting in a chair as shown in FIG. 2 or when the user is in long sitting on a bed as shown in FIG. 5. The current invention can also be used by a patient who is unable to sit up at all and is in a supine position on the bed, for example those with spinal cord injuries.
(49) Referring to FIG. 1 herein there is shown a side view of the device 100 according to a first embodiment of the present invention for use by a seated user to work the quadriceps muscles. The device comprises an elongate body 101 having a leg rest 102 comprising a calf support 103 and foot support 104. Straps 105 and 106 are applied around the calf and the foot respectively to fasten a user's leg to the device. The leg rest 102 is attached to a trolley 107 mounted on a friction-free longitudinal rail 108 which runs the predominant length of the elongate body 101, such that the trolley can move forward and backward along said longitudinal rail 108 in the direction of the arrow. Moving the trolley 107 longitudinally forward is against the resistance of the resistance cords described in FIG. 4.
(50) The friction-free rail is affixed inside the device under a wipeable external cover 109. Attachment of the leg rest 102 to the friction-fee rail 108 mounted within the elongate body 101 is via pivot joint 110. The leg rest 102 has an angle adjusting mechanism 111 to alter the angle between the foot rest 104 and the calf support 103. The angle adjuster 111 is connected to a mechanism 112 that on rotation widens or narrows the heel area 113 between the foot rest 104 and the calf support 103. This ensures individual user specifications depending on the ankle range of movement of each user. In the embodiment shown the heel area 113 does not allow contact with the heel tissue of the user, this is to prevent pressure sores. The user pushes with their forefoot onto the foot rest 104 to propel the trolley 107 that the leg rest 102 is attached to forward along the rail 108 against the resistance of the resistance cords illustrated in FIG. 4. The resistance cords can be accessed through an access hatch 114 (shown with cover on) located on the rear upper surface of the elongate body 101.
(51) In use, the trolley 107 is moved forwardly and backwardly by the extension and retraction respectively of a user's leg located in the leg rest 102. A contact sensor 115 located at the front of the friction-free rail 108 relays digital information regarding number of repetitions of full leg extension movements achieved by the user to the screen (403; FIG. 4) at the rear of the device.
(52) The extent of movement of the user's knee and hip can be limited if necessary by use of flexion block 116. The block being attached to the rail 108 behind the mobile trolley 107 and the leg rest 102 and being able to move longitudinally and be secured in place where appropriate for the individual user.
(53) The apparatus is configured to be used by someone sitting in a chair, as illustrated by the supporting legs 117 being rotated outwardly from under the body 101 by way of pivoting struts 118. A non-slip material 119 is applied to the floor contacting area of the support legs 117 to avoid movement of the device when in use in the chair configuration. The device further comprises a carry handle 120 located on the base of the elongate body 101.
(54) Referring to FIG. 2 herein there is shown perspective view 200 of a first embodiment of the present invention, a device for working the quadriceps, shown attached to a chair 201 via the securing mechanism or brace 202. The bracing mechanism 202 attaches the device 101 securely to the chair 201. The elongate body 101 of the device having a leg rest 102 comprising a calf support 103 and foot support 104 is illustrated with like parts denoted by like reference numerals. Straps 105 and 106 are applied around the calf and the foot respectively to fasten a user's leg to the device. The leg rest 102 is attached to a trolley 107 mounted on a friction-free longitudinal rail 108 which runs the predominant length of the elongate body 101, such that the trolley can move forward and backward along said longitudinal rail 108 in the direction of the arrow.
(55) Attachment of the leg rest 102 to the friction-fee rail 108 mounted within the elongate body 101 is via pivot joint 110. The leg rest 102 has an angle adjusting mechanism 111 to alter the angle between the foot rest 104 and the calf support 103. The angle adjuster 111 is connected to a mechanism (see FIGS. 1: 112) which upon rotation widens or narrows the heel area 113 between the foot rest 104 and the calf support 103. This ensures individual user specifications depending on the ankle range of movement of each user. In the embodiment shown the heel area 113 does not allow contact with the heel tissue of the user, this is to prevent pressure sores. The user pushes with their forefoot onto the foot rest 104 to propel the trolley 107 that the leg rest 102 is attached to forward along the rail 108 against the resistance of the resistance cords illustrated in FIG. 4. The resistance cords can be accessed through an access hatch 114 (shown with cover on) located on the rear upper surface of the elongate body 101.
(56) The friction-free rail is affixed inside the device under a wipeable external cover 109. A groove 203 in the top surface of the outer wipeable cover 109 allows contact between the hinged pivot joint 110 of the leg rest 102 and the friction-free rail 108, such that the trolley 107 can be moveably mounted to the rail 108. The groove 203 has an enclosing flap e.g. a rubber or brush strip, to prevent skin cells and debris from falling into the device and onto the rail 108.
(57) In use, the trolley 107 is moved forwardly and backwardly by the extension and retraction respectively of a user's leg located in the leg rest 102.
(58) Referring to FIG. 3 herein there is shown a side view 300 of the leg rest 102 comprising a foot 104 and calf support 103 in accordance with a first embodiment of the present invention. The arrow illustrates the direction that the leg rest can pivot and tilt when in use, due to the hinge joint 110. The ankle range of movement adjustment mechanism 111 and threaded insert 112 are also shown.
(59) Referring to FIG. 4 herein there is shown a partial perspective rear view 400 of a first embodiment of the present invention in chair configuration. Like parts are shown by like reference numerals. The device is shown with access hatch 114 located on the rear upper surface of the elongate body 101 uncovered to expose 5 resistance cords 401 arranged in parallel with the elongate body 101 of the device. The resistance cords 401 are anchored at a first end to the trolley 107 and at a second end to anchor points 402 on the rear interior of the body of the device 101. The resistance cords 401 can be easily added in, i.e. attached or unhooked from the rear anchor points 402 depending upon the resistance required by the user.
(60) The contact sensor (115 FIG. 1) at the front of the rail 108 relays digital information regarding number of repetitions of full leg extension movements achieved by the user to the screen 403 at the rear of the device.
(61) Referring to FIG. 5 herein there is shown a side view 500 of a first embodiment of the present invention in use on a bed 501 by a patient in long sitting on the bed.
(62) Referring to FIG. 6 herein there is shown is a perspective view 600 of a first embodiment of the present invention in use in a bed configuration. In the bed configuration, the supporting leg 117 at the first end are rotated out for use as the bed end stop whilst the leg at the second end is rotated under the device to provide an adjustable brace 601 which can be set against the bed end to prevent forward movement of the device during use. The bed end stop prevents the device from moving during use. The user is then able to perform the exercise by pushing with their forefoot so that the trolley 107 is moved longitudinally along the rail 108 away from the user, against the resistance of the resistance cords (401; FIG. 4). The user will have been set a number of repetitions of the movement to do and the repetitions can be tracked by user and therapist by looking at the digital rep counter 403.
(63) Referring to FIG. 7 herein there is shown a perspective view of a second embodiment of the apparatus of the present invention. The apparatus 700 comprises an elongate body 701 having first 702 and second 703 ends. The apparatus is mounted on a pair of legs 704 in adjustable attachment to the body of the device 701 about pivot points 705. The legs have rubber stoppers 706 or rubber feet to increase friction between the apparatus and the device on which it is placed to prevent the apparatus from slipping. The legs may further comprise joining clips 707 which permit two individual apparatus 700 to be joined together or may assist in joining the device to an anchor point for stability e.g. a chair. The legs are foldable beneath the device so that it can be used folded flat for storage.
(64) The upper surface of the elongate body 701 is a molded plastic shell of polyurethane or an aluminium extrusion 708 over which a nylon slide plate or trolley 709 is located. The nylon slide plate 709 provides a pivotal anchor point 710 for footplate 711, allowing the angle of the footplate to move freely relative the longitudinal axis L of the device. The footplate 711 may further comprise a removable heel pad 712, by adjusting the point of contact between the foot and the footplate the precise position though which a user has to exert force and thus the area of the user's anatomy which experiences pressure can be adjusted. Thus, when the removable heel pad 712 is absent, the device is driven by pressure through the ball of the user's foot and there is no pressure on the user's heel. Hence, the apparatus is operable without the need for a foot to be flat on the footplate i.e. it avoids pressure going through the heel portion. When the heel pad 712 is present, pressure is exerted through the user's heel via the removable heel pad into the footplate 711 of the device.
(65) A calf support 713 is adjustably connected to the footplate 711. The calf support is molded to reflect the anatomical shape of a user's calf to provide an ergonomic support to ensure that unsupervised patients maintain their leg in the correct orientation when utilizing the device. Both the footplate 711 and calf support 713 are lined in foam or soft material to aid the comfort of the user. The angle between the footplate 711 and calf support 713 is adjustable via knob 714 so that the angle of the ankle in said foot and calf support to account for the varying degree of flexibility each user has in their ankle joint. Counter clockwise movement of knob 714 reduces the angle between the footplate and the calf support 713, whilst clockwise rotation of knob 714 increases the angle between the footplate and the calf support 713.
(66) Anchor point 710 also joins the nylon slide plate or trolley 709 bearing the footplate 711 and calf support 713 to a connecting member in the form of steel cable 715. Steel cable 715 runs along a part of the length of the body of the device 701 over and around a wheel (see W in FIG. 8) to anchor the cable to a plurality of springs which provide variable resistance and form the inner workings of the device discussed in detail in FIG. 9.
(67) The resistance of the device and thus the energy required to be exerted by a user pushing though the footplate 711 is adjusted through resistance switches 716 located on the upper surface of the first end 702 of the body of the device 701. A spring-loaded release lever 717 is also provided to disengage the bed end stop (FIG. 8; 803) when the device is no longer in use. The outer limit 720 of the bed end stop is visible in retracted position in FIG. 7.
(68) The number of full leg extensions made is recorded by a digital or manual counter 718. Whilst an end stop clamp 719 is provided to limit the retraction of nylon slide plate or trolley 709 and thus restrict the extent of the user's movement when using the device.
(69) FIG. 8 illustrates a partial cross-sectional view 800 in accordance with the second embodiment of the present invention. Like numerals denote like parts. The elongate body of the device 701 having first 702 and second 703 ends houses steel cable 715 which is wound around wheel W and attached to a plurality of steel tension springs 801 naturally biased to retract and to pull the steel cable 715 towards themselves. The number of springs 801 engaged is determined by the number of organ stops 716 engaged on the surface of the apparatus. No physical user intervention with the resistance medium. When pressed down the organ stop engages the central aperture of the spring trapping it between the organ stop 716 and the lower surface 802 of the elongate body 701 in the direction of the arrow shown. In moving downwardly, the tension spring is in mechanical connection with the steel wire 715 increasing the resistance required by the user to move the trolley 709 towards the first end 702 of the apparatus.
(70) The legs of the apparatus 704 are moveable between first (1), second (2) and third (3) orientations as determined by the height of the ground level or surface the device is being used upon. In use, a bed end stop 803, which comprises a pole 804 extending along the inner length of the device provides stability allowing the device to rest against a bed footboard or headboard when used on a bed.
(71) When not in use the adjustable calf support 713 can be folded forward in the direction of the arrow for storage. The device further comprises a carry handle 805 on its underside so that the device can be carried and a hanging loop 806 for hanging the device.
(72) FIG. 9 herein shows a cross section 900 of a partial perspective view of the second embodiment of the present invention. The elongate body 701 is shown in partial cut through. Multiple steel coiled tension springs 801 are shown. The outermost two springs 901 are the weakest tension springs. These are in permanent attachment to the steel cable 715. The inner 3 springs 902 are engaged by depressing the relevant organ stop 716 and each offer differing and graduated levels of resistance.
(73) The organ stop structure 1000 is shown in vertical cross section in FIG. 10. The bed end pole 803 running through the device and the two outer springs 901 which are permanently attached to the trolley are visible in this cross section.
(74) Each organ stop 716 is coupled to the loop end 1001 of a steel spring 801 so that when the corresponding knob, stop or plunger 716 is depressed and pushed downwardly a lower end of the knob, stop or plunger engaged with the central aperture of the loop end of the spring(s) so that the springs are engaged thus increasing the tension experienced by the sliding element, increasing the resistance required by a user to move the footplate of the device in a forward motion.
(75) Referring to FIG. 11 herein there is shown a representative illustration to demonstrate the folding nature of the apparatus in accordance with a second embodiment of the present invention. The apparatus 1100 has two legs 704 folded upwardly into the underside 802 of the device 1100. A carry handle 805 on the underside of the device allows the device to be carried once said legs 704 are in a folded configuration.
(76) Referring to FIG. 12 herein there is shown a representative illustration in accordance with a second embodiment to demonstrate the portable nature of the apparatus. The apparatus 1200 is carried by handle 805 located on the underside of the apparatus and the calf and footplate have been folded inwardly into the body of the apparatus for ease of transport.
(77) Referring to FIG. 13 herein there is shown a representative perspective illustration of a device 1300 in accordance with a second embodiment of the present invention in use on a bed 1301. The device 1300 has pivotal legs 704 folded inwardly so that the outer limit of the device in contact with the bed 1301 is the curved underside 1302 of the device 1300 to which the legs 704 are pivotally mounted. The curved underside may be coated in rubber to enhance friction and prevent the device from slipping. A bed stop 803 extends from a first end of the device 1300 and prevents the device from moving forward when a user extends the footplate and calf support forming the ‘leg rest’ 1303 forward towards the bed stop end of the device.
(78) Referring to FIG. 14 herein there is shown a representative side illustration of a device 1400 in accordance with a second embodiment of the present invention in use on a bed 1301. The device 1400 has pivotal legs 704 folded inwardly so that the outer limit of the device and the carrying handle 805 are both in contact with the bed 1301 as is the curved underside 1302 of the device 1400 to which the legs 704 are pivotally mounted. The curved underside may be coated in rubber to enhance friction and prevent the device from slipping. An adjustable bed stop 803 extends from a first end of the device towards the bed footboard 1401 at variable distance D as required by the user. The bed stop 803 prevents the device from moving forward when a user extends the footplate and calf support of the device 1400 in a forward direction.
(79) Referring to FIG. 15 herein there is shown a representative perspective illustration of a single device 1500 in accordance with a second embodiment of the present invention for use by a seated individual. A first end 702 of the device 1500 is shown strapped to a chair 1501 by belt anchor 1502. The pivotal legs 704 are fully extended so that the device is raised from floor level.
(80) Referring to FIG. 16 herein there is shown a representative perspective illustration of two conjoined devices 1600 in accordance with a second embodiment of the present invention for use by a seated individual. First ends 702 of the respective devices 1600 are shown strapped to a chair 1501 by belt anchors 1502. The pivotal legs 704 of each device 1600 are fully extended so that the devices are raised from floor level. The devices 1600 are connected by plastic joining clips 1601 to allow the devices to be operated simultaneously without separating.
(81) Referring to FIG. 17 herein there is shown a perspective view of a third embodiment of the apparatus in accordance with the present invention. The apparatus 1700 comprises an elongate body 1701 having first 1702 and second 1703 ends. The apparatus is mounted on a pair of legs 1704 in adjustable attachment to the body of the device 1701 about pivot points 1705. The legs have stoppers or feet 1706 made from a thermoplastic elastomer (TPE) plastic to increase friction between the apparatus and the device on which it is placed to prevent the apparatus from slipping. The legs may further comprise joining clips 1707 which permit two individual apparatus 1700 to be joined together or may assist in joining the device to an anchor point for stability e.g. a chair. The legs are foldable beneath the device so that it can be used folded flat for storage.
(82) The upper surface of the elongate body 1701 is an aluminium extruded body 1708 over which an aluminium slide plate or trolley 1709 is located. The aluminium slide plate 1709 provides a pivotal anchor point 1710 for footplate 1711, allowing the angle of the footplate to move freely relative the longitudinal axis L of the device. The footplate 1711 may further comprise a removable heel pad 1712, by adjusting the point of contact between the foot and the footplate the precise position though which a user has to exert force and thus the area of the user's anatomy which experiences pressure can be adjusted. Thus, when the removable heel pad 1712 is absent, the device is driven by pressure through the ball of the user's foot and there is no pressure on the user's heel. Hence, the apparatus is operable without the need for a foot to be flat on the footplate i.e. it avoids pressure going through the heel portion. When the heel pad 1712 is present, pressure is exerted through the user's heel via the removable heel pad into the footplate 1711 of the device.
(83) A calf support 1713 is adjustably connected to the footplate 1711. The calf support is molded to reflect the anatomical shape of a user's calf to provide an ergonomic support to ensure that unsupervised patients maintain their leg in the correct orientation when utilizing the device. Both the footplate 1711 and calf support 1713 are lined in foam or soft material to aid the comfort of the user. The angle between the footplate 1711 and calf support 1713 is adjustable via adjusting means 1714 so that the angle of the ankle in said foot and calf support to account for the varying degree of flexibility each user has in their ankle joint. Counterclockwise movement of adjusting means 1714 reduces the angle between the footplate and the calf support 1713, whilst clockwise rotation of knob 1714 increases the angle between the footplate and the calf support 1713. The user's foot and leg are held in position by silicone straps ‘S’ attached to the footplate 1711 and calf support 1713 respectively. The strap bindings ‘S’ are adjusted by a CAM locks ‘C’ to ensure the user's foot and leg are held in place in the device.
(84) Anchor point 1710 also joins the aluminium slide plate or trolley 1709 bearing the footplate 1711 and calf support 1713 to a connecting member in the form of steel cable 1715. Steel cable 1715 runs along a part of the length of the body of the device 1701 over and around a wheel (see W in FIG. 19) to anchor the cable to a plurality of springs which provide variable resistance and form the inner workings of the device discussed in detail in FIG. 18.
(85) The resistance of the device and thus the energy required to be exerted by a user pushing though the footplate 1711 is adjusted through resistance switches 1716 located on the upper surface of the first end 1702 of the body of the device 1701. A spring-loaded release lever 1717 is also provided to disengage the bed end stop when the device is no longer in use.
(86) The number of full leg extensions made is recorded by a digital counter 1718. Whilst an end stop clamp 1719 is provided to limit the retraction of aluminium slide plate or trolley 1709 and thus restrict the extent of the user's movement when using the device. The device 1700 further includes a start line 1720 to denote the beginning position for the aluminium trolley 1709 when in use by a patient.
(87) In contrast to embodiment two, the device has a substantially rectangular flat end piece which forms an elongate bed stop 1721 and is shown in retracted configuration in FIG. 17. A further difference in third embodiment of the invention is that the foldable leg 1704 also provides a carry handle when the device is being transported.
(88) FIG. 18 herein shows a cross section 1800 of a partial perspective view of the device in accordance with a third embodiment of the present invention. The elongate body 1701 is shown in partial cut through. Multiple steel coiled tension springs 1801 are shown. The outermost two springs 1802 are the weakest tension springs. These are in permanent attachment to the steel cable 1715. The inner 3 springs 1801 are engaged by depressing the relevant organ stop 1716 and each offer differing and graduated levels of resistance.
(89) The bed end stop 1721 comprises two elongate poles 1803 which run through the body of the device 1701. Having two supports for the end stop provide greater stability to the device in use and also prevent the device from twisting. A spring-loaded release lever 1804 is operable to disengage the bed end stop and allow the rods 1803 to retract within the body of the device. The trolley 1709 must be at the start line 1720 before adjusting the resistance.
(90) Greater details of the organ stop arrangement of the third embodiment is illustrated in FIGS. 19a-c, 1900. Each organ stop 1716 is located in a vertical orientation protruding from the longitudinal body 1701 of the device. The organ stops comprise standard plungers as shown in FIG. 19b having a threaded portion 1901 and an enlarged flat portion 1902 which provides a gripping region. Referring to FIG. 19c the threaded portion 1901 of the plungers are operable to engage with a correspondingly threaded screw 1903 located within the device body. The plungers are pushed downwardly to engage the corresponding spring 1904 beneath, a loop end 1906 of steel spring 1904, so that when the corresponding plunger 1716 is depressed and pushed downwardly a lower end of the knob, stop or plunger engaged with the central aperture of the loop end of the spring(s) so that the springs are engaged. The spring 1904 which is engaged determines the tension and force required by the user to operate the device. To disengage the plunger, the knob-like gripping portion 1902, which may have undulations on it to aid gripping, is lifted upwardly and rotated 90 degrees to latch the plunger in a disengaged position in which the narrow-tapered end of the plunger 1905 sits above the screw 1903.
(91) Referring to FIG. 20 herein there is shown a partial cross-sectional view 2000 in accordance with the third embodiment of the present invention. Like numerals denote like parts. The elongate body of the device 1701 has first 1702 and second 1703 ends and the body 1701 houses steel cable 1715 which is wound around wheel W and attached to a plurality of steel tension springs 1801 naturally biased to retract and to pull the steel cable 1715 towards themselves. The number of springs 1801 engaged is determined by the organ stop 1716 engaged on the surface of the apparatus. When pressed down the organ stop engages with the central aperture of the loop end 1906 of the spring to increase the resistance required by the user to move the trolley 1709 towards the first end 1702 of the apparatus.
(92) Referring to FIG. 21 herein there is shown a representative perspective view 2100 of a device in accordance with a third embodiment of the present invention in use on a bed 2101. The device has pivotal legs 1704 folded inwardly so that the outer limit of the device in contact with the bed 2101 is the curved underside 2102 of the device to which the legs 1704 are pivotally mounted.
(93) The legs have stoppers or feet 1706 shown in FIG. 17 made from a thermoplastic elastomer (TPE) plastic to increase friction between the apparatus and the device on which it is placed to prevent the apparatus from slipping. The legs may further comprise joining clips 1707 which permit two individual apparatus 1700 to be joined together or may assist in joining the device to an anchor point for stability e.g. a chair. The legs are foldable beneath the device so that it can be used folded flat for storage.
(94) Referring to FIG. 21 the curved underside 2102 is coated in rubber to enhance friction and prevent the device from slipping. The bed stop 1721 extends from a first end of the device 2100 and prevents the device from moving forward when a user extends the footplate 1711 and calf support 1713 which form a ‘leg rest’ towards the bed stop end of the device.
(95) Referring to FIG. 22 herein there is shown a representative side illustration 2200 of a device in accordance with a third embodiment of the present invention in use on a bed 2101. The device has pivotal legs 1704 folded inwardly so that the curved underside 2102 of the device to which the legs 1704 are pivotally mounted is in contact with the bed 2101. The curved underside is to be coated in rubber to enhance friction and prevent the device from slipping. An adjustable bed stop 1803 extends from a first end of the device towards the bed footboard 2201 at variable distance D as required by the user. The bed stop 1803 prevents the device from moving forward when a user extends the footplate 1711 and calf support 1713 of the device in a forward direction.
(96) Referring to FIG. 23 herein there is shown a device in accordance with a third embodiment of the present invention in folded configuration for storage and transport 2300. The apparatus has two legs 1704 folded upwardly into the underside of the device. One of the legs 1704 has a coating 2301 of thermoplastic elastomer (TPE) plastic to increase friction between the apparatus and to provide a gripping area and handle for carrying the device once the legs 1704 are in a folded configuration.
(97) Referring to FIGS. 23 and 24 herein there is shown a device in accordance with a third embodiment of the invention. The apparatus is carried by handle 2301 which is a region of one of the supporting legs 1704. The calf 1713 and footplate 1711 have been folded inwardly into the body of the apparatus for ease of transport. An anchor strap 2302 is shown which can be used to secure the device to a chair when used in an upright position. A hanging loop 2303 can be used to aid hung storage of the device.
(98) Referring to FIGS. 25a and 25b there are shown perspective illustrations of a single device in accordance with a third embodiment of the present invention for use by a seated individual. An end 1703 of the device is shown strapped to a chair 2501 by belt anchor 2502. The pivotal legs 1704 are fully extended so that the device is raised from floor level. An extra-long belt anchor, approximately 2-3 meters in length 2503 may be used to secure the device around a large comfortable chair or may be 1-2 meters for securing a single device to an upright sturdy chair e.g. a dining chair. The belt anchor is made of hygienic gloss thermoplastic polyurethane.
(99) Referring to FIG. 25c there is shown a perspective illustration of two conjoined devices in accordance with a third embodiment of the present invention for use by a seated individual. Ends 1703 of the respective devices are shown strapped to a chair 2501 by belt anchors 2502. The pivotal legs 1704 of each device are fully extended so that the devices are raised from floor level. The devices are connected by plastic joining clips 1707 the illustration, shown to allow the devices to be operated simultaneously without separating. Alternatively, the devices may be joined by Velcro strapping 2503.
(100) Referring to FIGS. 26a and 27a herein there is shown a cutaway perspective view of a device 2600 in accordance with a fourth embodiment of the present invention. The device is shown in an orientation suitable for use by a seated individual. The device 2600 comprises pivotal legs 2601 extending substantially perpendicular to the longitudinal body of the device 2602 which has first 2603 and second 2604 ends. The body 2602 of the device is mounted on the pair of legs 2601 which are adjustably attachment to the body of the device 2602 about pivot points 2605. The legs are foldable beneath the device so that it can be used folded flat for storage or for use on a bed.
(101) The upper surface of the elongate body 2602 is a molded plastic shell of polyurethane or an aluminium extrusion over which a nylon slide plate or trolley 2606 is located. All moving parts are located within the body 2602 of the device, to provide a smooth other shell which enhances the slidability of the device. Further the containment of all moving parts within the device prevents the collection of skin debris within said moving parts and minimizes the risk of cross contamination between patients allowing the cover to be cleaned effectively and the device to be shared by several users.
(102) A footplate 2608 is mounted via pivotal anchor point 2607 to the body of the device 2602 by a gantry or nylon slide plate 2606 which can slide back and forth a distance of approximately 380 mm along the longitudinal body of the device. The pivotal anchor point 2607 for footplate 2608, allows the angle of the footplate to move freely relative the longitudinal axis L of the device. The footplate 2608 further comprises a removable heel support or pad 2609, which is a ‘U’ shaped block which sits within the footplate 2608. The outer limits of the ‘U’ shaped heel pad 2609 are in contact with the lower most portion of the footplate 2608 whilst the base of the ‘U’ provides a support to a cushioned insert 2610 located on the footplate 2608. When the heel pad 2609 is present in this orientation, pressure is exerted through the user's heel via the removable heel pad into the footplate 2608 of the device.
(103) By adjusting the orientation of the heel insert 2609 the point of contact between the foot and the footplate the device which determined the contact point though which a user has to exert force and thus the area of the user's anatomy which experiences pressure can be adjusted. The heel support 2609 can be turned upside down to reduce the pressure on the user's heel. The removable heel support 2609 can be stowed in the footplate in as per FIG. 27 in an alternative configuration in which, the outer limits of the ‘U’ shaped piece are upwardly facing and the central portion of the ‘U’ is in contact with the footplate 2608 so that in order to operate the device a user must apply pressure to the ball of their foot and there is no pressure on the user's heel. Hence, the apparatus is operable without the need for a foot to be flat on the footplate i.e. it avoids pressure going through the heel portion. A foot cushion 2618 is provided to protect the user's heel from the edges of the heel support 2609. The heel support 2609 is tethered to stop it from becoming lost or detached form the apparatus. Referring to FIGS. 26b and 27b the heel support 2609 is shown in the respective supporting and non-supporting configurations, relative to the body 2602 of the apparatus.
(104) A calf support 2611 is adjustably connected to the footplate 2608, together the calf support 2611 and footplate 2608 form a leg rest 2616. The angle between the footplate 2608 and the calf support 2611 is adjustable between 75° and 180°. The calf support is molded to reflect the anatomical shape of a user's calf to provide an ergonomic support to ensure that unsupervised patients maintain their leg in the correct orientation when utilizing the device. Both the footplate 2608 and calf support 2611 are lined in foam or soft material to aid the comfort of the user. The angle between the footplate 2608 and calf support 2611 is adjustable via adjustment means 2612 so that the angle of the ankle in said foot and calf support to account for the varying degree of flexibility each user has in their ankle joint. The angle between the footplate 2608 and the calf support 2611 is adjustable between 75° and 180°. Counterclockwise movement of the adjustment means which is a knob 2612 reduces the angle between the footplate 2608 and the calf support 2611, whilst clockwise rotation of knob 2612 increases the angle between the footplate and the calf support 2611.
(105) Anchor point 2607 also joins the gantry or nylon slide plate 2606 bearing the footplate 2608 and calf support 2611 to a connecting member in the form of steel cable 2613. The gantry 2606 is tethered by the steel cable 2613 to a spring assembly (resistance means) inside the housing 2602. The steel cable 2613 runs along a part of the length of the body of the device 2602 over and around a wheel (see W) to anchor the cable to a plurality of springs 2614 which provide variable resistance and form the inner workings of the device analogous to the second embodiment of the invention discussed in detail in FIG. 9. The steel cable 2613 passes around 3 pulleys 2619 located within the housing 2602. The presence of three pulleys reduced the amount the springs need to extend by three-fold, to only 125 mm which means that the springs have to withstand a pull force that is three times as much as the greatest force applied on to the foot support by the user. This is the block and tackle principle. In this embodiment, there are three pulleys are assembled to form blocks, two of the pulleys are fixed and the third pulley 2620 moves with the movement of the gantry 2606 i.e. it moves with the load. The steel cable is threaded through the pulleys 2619/2620 to provide a mechanical advantage which amplifies the force required by the user to move the leg rest 2616.
(106) The resistance of the device and thus the energy required to be exerted by a user pushing though the footplate 2608 is adjusted through resistance switches 2615 located on the upper surface of the first end 2603 of the body of the device 2602. Further features including the spring-loaded release lever, bed end stop and digital or manual counter as detailed in the second embodiment are also common to this embodiment.
(107) Referring to FIGS. 28 a to c, the difference between the third and fourth embodiments of the present invention is that in the fourth embodiment of the invention, the footplate 2608 and calf plate 2611 which collectively form the leg rest assembly 2616 is rotatable through 180° relative to the longitudinal body of the device 2602. Rotation is about the axis of pivot point 2617 and permits the device versatility to be used for hamstring or quadriceps exercising as determined by the orientation of the leg rest 2616. The gantry/trolley 2606 remains slidably attached to the body 2602 of the apparatus. It will be understood that rotation through substantially 180° relative to the longitudinal body of the device 2602 would also enable a user to switch between hamstring and quadriceps mode.
(108) In a first orientation, for exercising the quadriceps the open side of the gantry or trolley 2606 and footplate 2608 assembly is facing towards the first end of the apparatus 2603 bearing the resistance switches 2615. Movement of the trolley 2606 from the second 2604 to the first end 2603 of the body 2602 is a result of the application of force by the quadriceps pushing through the knee joint to propel the trolley 2606. The force applied by the user is a pushing force against the resistance applied by the resistance members 2614. The user's leg is extended to drive movement of the trolley away from the user.
(109) In a second orientation, the rear of the trolley 2606 and footplate 2608 assembly R faces towards the first end of the device 2603 bearing the resistance switches 2615. Movement of the trolley 2606 from the second 2604 to the first end 2603 of the body 2602 is a result of the application of force by the user's hamstrings pulling the trolley 2606 against the resistance means to propel the trolley 2606. Thus, the device can be interchangeably used to exercise both the quadriceps in a pushing action and the hamstrings via a pulling action. The user's leg is bent to cause movement of the trolley towards the user. The force required by the hamstrings or the quadriceps is variable and is determined by the number of resistance means engaged by the steel cable connected to the gantry 2606.
(110) Once the orientation of the device has been selected according to the exercise required by the user, the footplate 2608 position is secured to the gantry 2606 by a lift plunger 2617. When aligned according to the usage required by the user, the plunger 2617 will automatically locate in the corresponding hole located on the gantry 2606. An adjustable strap may be provided with the fourth embodiment of the invention for securing the device at its second end 2604 to a chair when the device is being use for pushing exercises to propel the gantry/trolley 2606 away from the user by action of their quadriceps. Alternatively, the adjustable strap may be used to secure the device at the first end 2603 to a bed end. The strap may also be positioned around the end of a bed when the device is in use in folded leg configuration on top of said bed and is being used to work the hamstrings by the pulling movement of the patient whose flexing of the leg would pull the trolley 2606 towards the user against resistance to work the hamstrings.
(111) Referring to FIGS. 29a and 29b are a perspective and partial cutaway perspective view of a device in accordance with the fourth embodiment of the invention. The device is shown with in configuration for use by a seated individual to exercise their hamstrings. The legs of the device 2601 at aligned substantially perpendicular to the body of the device 2602 and support the body of the device above floor level at a height which is suitable for use by a seated individual. A user's foot is positioned on the footplate 2608 and the user's leg is aligned with the ergonomically shaped calf support 2611. The leg is strapped to the footplate and calf support via straps 2621 and 2620 respectively. As with all fourth embodiment figures, like numerals denote like parts.
(112) FIG. 30 shows a close up illustration of the resistance component in accordance with the fourth embodiment of the present invention. The resistance means 2614 comprise two outer springs 2622, referred to as ‘weak springs’ that are designed to always return the spring assembly to the start positon and which provide very light resistance; one medium spring 2623; and two strong springs 2624. The springs are mechanically attached via their hook ends to the steel cable via stops, for example organ stop-like plungers (FIG. 29a: 2615). The plungers should only be selected when the gantry (FIG. 29a: 2606) has returned to the start position (FIG. 26a: 2604). When all the plungers are lifted up and rotated by 90° they latch in an upward position to allow the three resistance springs to move freely. When no plungers are down the outer return spring provides a light force of 3 kg. Some of this force will be reduced due to friction. By rotating the first plunger (to the right hand side of an individual using the device) it is released downwardly and acts as an anchor when the spring assembly moves towards the user. It will hold the weak spring back so the user will feel more resistance.
(113) With the weak spring connected (user's right hand plunger down) there is a force of 6.6 kg; with the medium spring connected (user's left hand plunger engaged) there is a force of 10 kg and with the strong spring connected (middle plunger engaged) there is a force of 13 kg. When all spring are connected (all plungers are down) there is a force of 23.6 kg.
(114) FIG. 31 shows an illustration of the leg rest 2616 component in accordance with the fourth embodiment of the present invention. The leg rest 2616 comprises a foot plate 2608 hingedly attached to a calf support 2611 via hinge 2612 whose angle is adjustable, so that the angle of the ankle in said foot and calf support to account for the varying degree of flexibility each user has in their ankle joint. The angle between the footplate 2608 and the calf support 2611 is adjustable between 75° and 180°. Counterclockwise movement of the adjustment means which is a knob 2612 reduces the angle between the footplate 2608 and the calf support 2611, whilst clockwise rotation of knob 2612 increases the angle between the footplate and the calf support 2611. The entire leg rest assembly 2616 is pivotally attached at 2607 to the sliding gantry 2606. The orientation of the leg rest 2616 relative to the gantry 2606 is rotatable through 180° relative to the longitudinal body of the device 2602. Rotation is about the axis of pivot point 2607. The gantry/trolley 2606 remains slidably attached to the body 2602 of the apparatus. A user's leg and foot are strapped into the leg rest via straps 2620 and 2621 respectively. Straps 2620 and 2621 are mounted directly to the footplate 2608 and calf support 2611 via plastic buckles 2625 which receive the support straps there through and allow the straps to be tightened around a user's leg and foot.
(115) FIG. 32 shows an illustration of a component of the device in accordance with the fourth embodiment of the invention. A digital counter 2626 is shown mounted on the component which when is situ fits flush with the body of the housing. Two of the pulleys 2619 located within the housing of the apparatus are shown. The pulleys are surrounded by an internal housing 2628 which is attached via screws to the inside of the housing 2602. A pair of abutments 2627 protrude from the internal housing 2628 to provide a stop for the third pulley (FIG. 29a: 2620) which moves within the body of the housing.
(116) FIGS. 33a and 33b are partial cutaway front views of a device in accordance with the fourth embodiment of the invention. FIG. 33a shows the device in quadriceps configuration with the gantry 2606 located at the first end (FIG. 26a: 2603) of the device. FIG. 33b shows a partial cutaway view of the device. FIG. 33a shows the device in quadriceps configuration with the gantry 2606 located at the second end (FIG. 26a: 2604) of the device Each stop means 2615 is coupled to the loop end 2629 of steel springs (FIG. 30: 2622; 2623; 2624) so that when the corresponding knob, stop or plunger 2615 is depressed and pushed downwardly a lower end of the knob, stop or plunger engaged with the central aperture of the loop end of the spring(s) so that the springs are engaged thus increasing the tension experienced by the sliding element, increasing the resistance required by a user to move the footplate of the device. When the knob, stop or plunger 2615 is lifted upwardly, the plunger 2615 pivots about pivot 2630 such that the plunger can rotate 90° and latch in said upward position to allow the three resistance springs (FIG. 30: 2623; 2624) to move freely.
(117) FIGS. 34a and 34b are side views of a device in quadriceps configuration in accordance with the fourth embodiment of the invention for use on a bed with legs beneath the device. FIG. 34a shows the device in quadriceps configuration with the gantry 2606 located at the second end (FIG. 26a: 2604) of the device and FIG. 34b shows the device with the gantry 2606 located at the first end (FIG. 26a: 2603) of the device body 2602. The legs 2601 are folded beneath the device for use on a flat surface for example a bed. The bed end stop 2631 is shown in a retracted position, when extended and the leg rest comprising the footplate 2608 and the calf support 2611 is moved on the gantry 2606 along the body of the device 2602 the position of the device relative to the bed on which the device is being supported is not altered. The bed end stop provides a support brace. Like numerals denote like parts.
(118) FIGS. 35a and 35b are cutaway side views of a device in quadriceps configuration accordance with the fourth embodiment of the invention for use on a bed with legs beneath the device. FIG. 35a shows the device in quadriceps configuration with the gantry 2606 located at the second end (FIG. 26a: 2604) of the device and FIG. 35b shows the device with the gantry 2606 located at the first end (FIG. 26a: 2603) of the device body 2602. When the leg rest is at the first end of the device the third pulley 2620 which moves with the movement of the gantry 2606 is located remote from the other two pulleys 2619. When the leg rest is at the second end of the device the third pulley 2620 which moves with the movement of the gantry 2606 is located in close proximity to the other two pulleys 2619. The legs 2601 are folded beneath the device for use on a flat surface for example a bed. The bed end stop 2631 is shown retracted.
(119) FIG. 36 is a partial perspective view of the device in accordance with the fourth embodiment of the invention for by a seated individual. The leg rest is shown in an intermediate position between the orientation required by a user to exercise their quadriceps or hamstrings. Like numerals denote like parts.
(120) FIGS. 37a and 37b are perspective views of a device in accordance with the fourth embodiment of the invention for use on a bed with legs beneath the device. FIG. 37a shows the device in quadriceps configuration with the gantry 2606 located at a second end 2604 of the body 2602. FIG. 37b shows the device in with the trolley/gantry 2606 located at a first end 2603 of the body 2602. Like numerals denote like parts.
(121) FIGS. 38a and 38b are plan views of a device in accordance with the fourth embodiment of the invention for use on a bed with legs beneath the device, a handle 2632 is provided for transport of the device. FIG. 38a shows the device in quadriceps configuration with the gantry 2606 located at a second end 2604 of the body 2602. FIG. 38b shows the device in quadriceps configuration with the trolley/gantry 2606 located at a first end 2603 of the body 2602. Like numerals denote like parts.
(122) FIGS. 39a and 39b are rear perspective views of a device in accordance with the fourth embodiment of the invention. Securing straps 2633 are shown at both ends of the device the three possible positions of the moveable legs are all illustrated. FIGS. 39a and 39b show the device in quadriceps configuration.
(123) FIGS. 40a, 40b, 40c. 40d, 40e and 40f show various views of a device in accordance with the fourth embodiment of the invention for use on a bed with legs beneath the device and the bed end stop 2631 extended. The bed end stop is mounted on two rod like projections 2634 which are stowed in the body of the device when the bed end stop is not in use. The device is configured for exercising the quadriceps. FIGS. 40a and 40f are end views, FIG. 40b is a plan view, FIG. 40c is a side view, FIG. 40d a rear view and FIG. 40e a perspective view.
(124) FIG. 41 shows a side view of a device in hamstring configuration accordance with the fourth embodiment of the invention for use on a bed with legs beneath the device. The gantry 2606 located at the second end (FIG. 26a: 2604) of the device. The legs 2601 are folded beneath the device for use on a flat surface for example a bed. The bed end stop 2631 is shown in a retracted configuration, when the bed end stop is extended the position of the device relative to the bed on which the device is supported is not altered when the trolley 2606 is moved along the body of the device 2602. The bed end stop provides a support brace. The optional securing strap 2633 which may also be used as a carrying strap is shown at the second end of the device. Like numerals denote like parts.
(125) FIG. 42 shows a side view of a device in hamstring configuration accordance with the fourth embodiment of the invention for use by an individual seated in a chair. The gantry 2606 located at the second end (FIG. 26a: 2604) of the device body 2602. The legs 2601 are outstretched beneath the device at approximately 80-85° relative to the body of the device 2602 to elevate the device from floor level. The bed end stop 2631 is shown in a retracted, stowed configuration. Like numerals denote like parts.
(126) In the embodiments disclosed herein, the footrest has adjustability to have either no pressure on the heel area, or full pressure on the heel area, depending upon the individual patient's needs. The devices may allow no pressure during the action of the movement of the device for those patients who have pressure sores or fragile skin on their heels or full pressure for those for example with neurological conditions to avoid an increase in tone and the leg muscles.
(127) In prior art devices, these have the disadvantages that there is no way to stop those devices from moving about as they are being used. However various ones of the present embodiments have the following advantageous features: If a patient requires the device to work their hamstrings, the foot rest/leg rest will rotate on its axis substantially 180° to face in the opposite direction. The person/patient will sit at the other end of the device, and/or the device will be turned around 180° for them to use, and they will rest the leg in the leg rest as usual, but will be able to pull the trolley towards them using a knee flexion/bend, instead of pushing it away using an extension, and therefore using the hamstring muscles, rather than the quads. This is made possible because of the block and tackle feature set up inside the device. This mechanism is a 3 pulley system attached to the 5 internal resistance springs 2614. This allows the trolley 2602 and footplate assembly to travel three times further than the extension of the springs, but the spring force needs to be three times stronger. An adjustable, telescopic end stop at the front end of the device maintains correct position of the device on the bed and stops the device from being pushed down a hospital bed by a patient doing pushing/extending actions to work the quadriceps muscles. The adjustable strap, being the same one that is used to maintain the device in the correct position when used in chair mode, that can be positioned around the end of the hospital bed to avoid the device from being moved up the bed by the action of the patient flexing their leg in the device, to work the hamstrings, when the leg rest has been rotated around and the device is being used the other way round. The device has all mechanical moving parts inside the body of the device, which ensures a smooth outer surface and therefore avoids collection of skin debris and minimizes the risk of cross infection between patients using the device. Rotation about the footrest may be up to 180° allowing the device to rotate between hamstring and quadriceps configuration. There is also provided a counter adjustability between the footplate and the calf support to adjust the angle in which the user's foot is held.
(128) It will be understood that various modifications will be apparent to those skilled in the art. For example the nylon slide plate or trolley may be replaced by any other form of moveable mechanism anchorable to the base of the footplate. The steel cable may be replaced with an alternative reinforced connecting means e.g. a chain or reinforced fibers.
