Abstract
A locking clip for attaching a patient sling to a spreader bar includes a first attachment site for accepting an attachment element mounted on either the sling or the spreader bar, a second attachment site for attaching the device to the other of the sling or the spreader bar, and at least one locking element for locking the attachment element in place. The clip also includes a release mechanism to allow removal of an attachment element and is configured to allow rotation of the attachment element when it is locked in place so that the sling can be rotated relative to the spreader bar.
Claims
1. An attachment device for attaching a patient sling to a spreader bar, the device comprising: a first attachment site attachable to an attachment element of the sling or the spreader bar; a second attachment site attachable to the other one of the sling or the spreader bar; a locking element that locks the attachment element to the first or second attachment site automatically upon initial connection of the attachment element to the first or second attachment site, wherein the locking element is configured to allow movement of the attachment element along an axis of movement into the first or second attachment site, and the locking element prevents removal of the attachment element from the first or second attachment site; and a release mechanism operable to allow removal of the attachment element, wherein the attachment device is configured to allow rotation of the attachment element about the axis of movement when the attachment element is locked in place, wherein the locking element is configured to move from a first position in which the locking element restricts access to the first attachment site to a second position in which the locking element allows access to the first attachment site, wherein the locking element is resiliently biased into the first position, and wherein operation of the release mechanism removes said resilient bias to allow the locking element to move from the first position to the second position.
2. The attachment device as claimed in claim 1, wherein the attachment device is formed generally on a plane, and wherein the axis of movement is substantially perpendicular to the plane.
3. The attachment device as claimed in claim 1, wherein the locking element is configured to rotate about an axis substantially perpendicular to the axis of movement in order to move from the first position to the second position.
4. The attachment device as claimed in claim 1, wherein the locking element is configured to move laterally along an axis substantially perpendicular to the axis of movement in order to move from the first position to the second position.
5. The attachment device as claimed in claim 1, wherein operation of the release mechanism allows the attachment element to move out of the first attachment site in a direction substantially perpendicular to the axis of movement, thereby bypassing the locking element, and wherein the attachment device further includes a channel in communication with the first attachment site along which the attachment element is able to move in order to bypass the locking element.
6. The attachment device as claimed in claim 1, further comprising a second locking element.
7. A kit of parts comprising an attachment device as claimed in claim 1, wherein the attachment element is removeably attachable to the attachment device.
8. The kit of parts as claimed in claim 7, wherein the attachment element is a knob having a flange and a recessed portion and wherein the locking element is configured to be seated in the recessed portion when the attachment element is locked in the first attachment site.
9. The kit of parts as claimed in claim 7, wherein both the attachment element and the first attachment site are circular in cross-section.
10. The kit of parts as claimed in claim 7, wherein the attachment element is attached to a spreader bar and the attachment device is attached to a patient sling.
11. A lift system comprising the attachment device as claimed in claim 1 and further comprising a spreader bar operatively associated with the attachment device.
12. The lift system of claim 10, further comprising a patient support sling operatively associated with the attachment device.
13. A patient sling comprising: an attachment device as claimed in claim 1 attached thereto.
14. A patient spreader bar comprising: an attachment device as claimed in claim 1 attached thereto.
15. An attachment device as claimed in claim 1, wherein the locking element is a quick connect coupling.
16. An attachment device for attaching a patient sling to a spreader bar, the device comprising: a first attachment site attachable to an attachment element of the sling or the spreader bar; a second attachment site attachable to the other one of the sling or the spreader bar; a locking element that locks the attachment element to the first or second attachment site automatically upon initial connection of the attachment element to the first or second attachment site, wherein the locking element is configured to allow movement of the attachment element along an axis of movement into the first or second attachment site, and the locking element prevents removal of the attachment element from the first or second attachment site; and a release mechanism operable to allow removal of the attachment element, wherein the attachment device is configured to allow rotation of the attachment element about the axis of movement when the attachment element is locked in place, wherein operation of the release mechanism moves the locking element from the first to the second position.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
(1) A number of preferred, non-limiting embodiments of the present disclosure will now be described, with reference to the drawings, in which:
(2) FIGS. 1A and 1B are schematic diagrams of prior art spreader bar and sling systems;
(3) FIGS. 2A-2C show prior art clips for use on, for example, the system of FIGS. 1A and 1B;
(4) FIGS. 3A and 3B show one embodiment of a clip of the present disclosure;
(5) FIGS. 4A-4H show stages of operation of the clip of FIGS. 3A and 3B;
(6) FIGS. 5A-5C show an alternative embodiment of a clip of the present disclosure;
(7) FIGS. 6A-6G show stages of operation of the clip of FIG. 5;
(8) FIGS. 7A-7D show stages of attachment of an alternative embodiment of a clip in accordance with the present disclosure;
(9) FIG. 8 shows stages of the removal of the exemplary clip of FIG. 7;
(10) FIGS. 9A-9B are schematic diagrams showing the attachment of a clip in accordance with the present disclosure to a spreader bar frame;
(11) FIGS. 10A-10B are schematic diagrams showing an alternative method of attachment of a clip in accordance with the present disclosure to a spreader bar frame; and
(12) FIG. 11 shows a schematic diagram of a patient positioned in a patient sling that employs an attachment device disclosed herein.
DESCRIPTION OF NON-LIMITING ILLUSTRATIVE EMBODIMENTS
(13) An exemplary embodiment of a clip in accordance with this disclosure is shown in FIGS. 3A and 3B, and the use of such a clip is illustrated in FIG. 4.
(14) Turning first to FIGS. 3A and 3B, clip 30 comprises a generally flat rectangular body 31 having slot 32 to which a strap can be attached (not shown). Two latches 33 are disposed on either side of rectangular aperture 35. Latches 33 are each pivotally mounted on separate shafts (not shown), which passes through the center of each latch and into clip body 31. Latches 33 are free to rotate about the shaft with the axis of rotation lying in the plane of clip body 31.
(15) In one embodiment, latches 33 may have a generally cylindrical in shape, each including a notch 34 configured to engage and conforming to a portion of a spreader bar 99, 109 connector 95, 105. In the embodiment shown in FIG. 3B, notch 34 has a cut-out cuboidal configuration in one side of each latch 33 that faces the opposite latch. Accordingly, it can be seen that rotation of latches 33 rotates notches 34 so as to face each other across aperture 35, thereby increasing the effective width of aperture 35 by double the depth of each notch 34. Rotation of latches 33 by 90°-270° narrows the effective width of aperture 35 to a width that is equal to the natural width of aperture 35 minus the diameters of latches 33. When the latches 33 are in these positions the latches may be referred to as in the “closed” configuration. A spring mechanism (not shown) of the clip 30 biases latches 33 into the configuration shown in FIG. 3A, which is one of the closed configurations. A release mechanism (not shown) of the clip 30 rotates latches 33 against the bias of the spring mechanism into the “open” configuration (see FIG. 3B) in which notches 34 face each other.
(16) Clip body 31 also has angled slot 36 in communication with aperture 35 at one end and a terminus opening 37 at the other end. In one embodiment, aperture 35, slot 36 and terminus opening 37 may form a keyhole opening. The function of this structure will be described below.
(17) As best shown in FIGS. 9A-11, clip 30, 50, 70 may be part of a patient transfer or lift system in which one or more clips 30, 50 or 70 are operably associated with a connector 95, 105 of a spreader bar 99, 109 and/or a strap, belt or portion of a patient sling 15. By way of example, the connector 95, 105 may be integral with, attached to, extending from and/or otherwise mounted on spreader bar 99, 109. The connector 95, 105 may be configured to engage and be secured to aperture 35, 55, 75, slot 36, 76 and/or terminus 37, 77. In an exemplary embodiment, the connector 95, 105 may be configured as a protrusion, knob, hook or catch. An attachment member of patient sling 15, such as a belt, strap, loop, pocket or folded surface, may be operably associated with one or more clips 30, 50 or 70 securing it to the patient sling. In one embodiment, the attachment member of patient sling 15 may be inserted through, coupled to or otherwise attached to slot 32, 52, 72 of clips 30, 50 or 70.
(18) FIGS. 4A-4D illustrate one embodiment in which mounting of clip 30 on a connector, configured as knob 40, and FIGS. 4E-4H illustrate the removal of clip 30 from knob 40. Knob 40 is as described above in relation to FIG. 2A.
(19) In FIG. 4A, clip 30 is presented to knob 40 and is positioned so that knob 40 and aperture 35 are in alignment. In FIG. 4B, clip 30 is pushed towards knob 40 so as to force knob 40 to enter aperture 35 between latches 33. In FIG. 4C, latches 33 rotate against the bias of the spring mechanism until notches 34 become aligned with knob 40, allowing knob 40 to pass through aperture 35 (which has a wider effective width in this position) to emerge on the other side of clip 30.
(20) Once knob 40 has crossed latches 33, the spring mechanism causes latches 33 to return to their initial position (i.e., a closed configuration), so that latches 33 are locked behind knob 40. Thus positioned with a rearward facing ridge of knob 40 abutting latches 33, knob 40 is securely and rotatably locked within aperture 35. This configuration is shown in FIG. 4D.
(21) In order to release clip 30 from knob 40, the user activates the release mechanism in order to rotate latches 33 until notches 34 face each other, as shown in FIG. 4E. The user then aligns apertures 35 with knob 40 and removes clip 30 from knob 40 as shown in FIGS. 4F to 4H.
(22) Optionally, the user can carry out a further locking procedure (not shown) by moving clip 30 laterally relative to knob 40 in order to move knob 40 along channel 36 until it sits in terminus 37. This action can then be reversed in order to move knob 40 back into engagement with latches 33.
(23) It will be appreciated that this mechanism may be configured so that clip 30 is asymmetric, in that knob 40 needs to approach clip 30 from one specific side. In this embodiment, it is therefore not possible to insert the clip from the other side. A connector is therefore limited to engaging clip 30 from one direction and at one access or engagement point through aperture 35. In one embodiment, spring biased latches 33 may be configured to restrict rotation between two specific positions, to and from the closed position shown in FIG. 4A and an open position shown in FIGS. 4B-4C.
(24) A further embodiment of the present disclosure is illustrated in FIGS. 5A-5C and 6A-6G. These Figures show clip 50 having body 51, strap slot 52 and a pair of rotating latches 53 on either side of aperture 55. Latches 53 each have a notch 54 that catches the head of knob 40 in use, as will be described below. A spring mechanism (not shown) biases latches 53 into the locked configuration (see, e.g., FIG. 5C).
(25) FIGS. 5B and 5C also illustrate release mechanism 58, which is shown in FIG. 5B in an unlocked position in which latches 53 are free to rotate about an axis in the plane of clip body 51. Release mechanism 58 is however spring-biased into a locked position as shown in FIG. 5C in order to prevent rotation of latches 53 and to lock knob 40 in place.
(26) The attachment of clip 50 to knob 40 is now described with reference to FIGS. 6A-6D and the removal of the same described by reference to FIGS. 6E-6G.
(27) First, release mechanism 58 is moved into the unlocked position and clip 50 is presented to knob 40 so as to align knob 40 with aperture 55 (FIG. 6A). Clip 50 is then pushed so as to force knob 40 to enter aperture 50 between latches 53 (FIG. 6B). Once knob 40 is fully inserted, release mechanism 58 is automatically moved into the locked position in order to lock rotation of latches 53 (FIG. 6C). FIG. 6D shows clip 50 locked in place on knob 40.
(28) In order to remove clip 50, release mechanism 58 is first pulled into the unlocked position in order to unlock rotation of latches 53 as shown in FIG. 6E. Clip 50 can then be pulled away from knob 40, which will slide out whilst rotating latches 53 (FIG. 6F). FIG. 6G shows clip 50 removed from knob 40.
(29) An alternative embodiment of a clip in accordance with this disclosure is illustrated in FIGS. 7A to 7D and 8. This is known as the “sliding latch” embodiment.
(30) As shown in FIGS. 7A to 7D and 8, clip 70 comprises clip body 71 and clip housing 78 in which clip body 71 is slidably mounted. Clip body 71 has strap slot 72 and aperture 75 therein, with aperture 75 in communication with channel 76 and terminus 77. A pair of latches 73 are mounted on clip housing 78 and are aligned with aperture 75 when clip body 71 is in the “locked” position (the left hand image in FIG. 8) and are aligned with channel 76 when clip body 71 is in the “unlocked” configuration (the right hand image of FIG. 8). Latches 73 extend from clip housing 78 towards aperture 75, and may be oriented with respect to clip body 71 to cover opposing portion of aperture 75. In one embodiment, a substantial portion of latches 73 may be supported or backed by a surface of clip body 71, lending strength or rigidity to latches 73. The unattached distal ends of latches 73 extending over a portion of aperture 75 may be movable with respect to clip body 71 and aperture 75 to permit knob 40 to pass therebetween and catch a lip of knob 40 to secure knob 40 within aperture 75. In an exemplary embodiment, latches 73 may be constructed as cantilevered leaf springs, elongate metal member or elongate plastic members. In one embodiment, latches 73 may be constructed and/or configured to substantially prevent withdrawal of knob 40 after it is secured within aperture 75 as shown in FIG. 7D. Clip body 71 can be moved from the locked to the unlocked configuration by sliding it into and out of clip housing 78. Clip housing 78 has release strap 80 at the other end of clip housing 78 to clip body 71.
(31) In order to attach clip 70 to knob 40, clip 70 is presented to knob 40 in its locked state, by aligning aperture 75 with knob 40 (FIG. 7A). Clip 70 is then pushed in order to force knob 40 to enter aperture 75 between spring-loaded latches 73 (FIG. 7B). Further pushing of clip 70 as shown in FIG. 7C will enable knob 40 to cross spring-loaded latches 73 at which point they close behind the head of knob 40 and clip 70 is completely secured to knob 40 (FIG. 7D).
(32) In order to remove clip 70 from knob 40, the user pulls on release strap 80 in order to slide clip body 71 out of clip housing 78 and into the unlocked position (see, e.g., right-hand portion of FIG. 8). This brings aperture 75 laterally away from latches 73 at which point clip 70 can be removed from knob 40.
(33) FIGS. 9A and 9B, and 10A and 10B, show schematic diagrams of the clips of the present disclosure, generically referenced as 90 and 100 but which may be interchanged with any of the aforementioned clip embodiments 30, 50, 70 of this disclosure, in which the clips are in an unmounted state (FIGS. 9A and 10A) and a mounted state (FIGS. 9B and 10B) with respect to attachment knobs 95 and 105 of spreader bars 99 and 109, respectively. Notably, FIGS. 9B and 10B illustrate the locking of clips 90, 100 in a single step by inserting connector 95, 105 in the corresponding apertures of clips 90, 100. In one embodiment, clip 90, 100 and their corresponding latches may be configured as or essentially function as a quick connect mechanism. The latches automatically lock to rotatably secure connector 95, 105 in the clip aperture immediately upon initial connection of connector 95, 105 to clip 90, 100. While connector 95, 105 may be subsequently moved to a terminus opening of the clip's key hole shaped aperture, this is optional and not necessary to ensure that clips 90, 100 are locked and rotatably secured to spreader bars 99, 109. Moreover, as discussed above, the two step clip release process in which: (a) the release mechanism of the clips 90, 100 is moved to an unlocked position allowing for rotation of the clip latches and (b) subsequent separation of the connector 90, 105 through apertures of clips 90, 100, ensures that the clips 90, 100 are not accidentally disengaged from spreader bars 99, 109.
(34) FIG. 11 shows a schematic diagram in which a patient sling 15 is used to support a patient P. The attachment device of the present invention shown here as clip 90, 100 are operatively associated with and securely connect patient sling 15 to the spreader bar 99, 109. The clip 90, 100 is connected to the spreader bar 99, 109 via the connector 95, 105, which is attached to the spreader bar 99, 109. The connector 95, 105 is maintained within the aperture of the clip 90, 100 due to rotation of the latches to the spring-biased position, namely, the closed configuration. As described above, the connector 95, 105 may be removed from the aperture by rotating the latches to the open configuration using a release mechanism. While FIG. 11 illustrates clip 90, 100 in combination with connector 95, 105, any of the clips 30, 50 or 70 may be substituted for clip 95, 105 in accordance with this disclosure.
(35) All optional and preferred features and modifications of the described embodiments and dependent claims are usable in all aspects of the invention taught herein. Furthermore, the individual features of the dependent claims, as well as all optional and preferred features and modifications of the described embodiments are combinable and interchangeable with one another.
(36) The disclosure in the abstract accompanying this application is incorporated herein by reference.
