Exercise machines having adjustable elliptical striding motion

Abstract

An exercise machine is for performing a striding exercise motion. The exercise machine has frame; first and second pedal members; first and second foot pads on the first and second pedal members, respectively, each of the first and second foot pads being configured to move in an elliptical path during the striding exercise motion; first and second rocker arms pivotally coupled to the frame; and first and second adjustment devices configured to actively adjust and set a position of the first and second pedal members relative to the first and second rocker arms, respectively, which thereby changes a shape of the elliptical path.

Claims

1. An exercise machine for performing a striding exercise motion, the exercise machine comprising: a frame; first and second pedal members; first and second foot pads on the first and second pedal members, respectively, wherein the first and second foot pads are configured to move in respective elliptical paths during the striding exercise motion; first and second rocker arms pivotally coupled to the frame, wherein the first and second pedal members depend from and pivot along with the first and second rocker arms relative to the frame; first and second adjustment devices configured to actively adjust and set a position of the first and second pedal members relative to the first and second rocker arms, respectively, which thereby changes a shape of the elliptical paths, respectively; and first and second front link arms that are pivotally coupled at a first pivot axis to a lower portion of a respective one of the first and second rocker arms, and pivotally coupled at a second pivot axis to a forward portion of a respective one of the first and second pedal members; wherein the first and second adjustment devices are coupled to the respective one of the first and second pedal members and to a respective one of the first and second link arms intermediate the first pivot axis and second pivot axis, and wherein the first and second adjustment devices are configured to actively adjust and set a relative position of the first and second pivot axes on the first and second link arms, respectively, which thereby changes the shapes of the elliptical paths.

2. The exercise machine according to claim 1, wherein the first and second adjustment devices each comprises a linear actuator that is extendable and retractable to adjust the relative position of the first and second pivot axes.

3. The exercise machine according to claim 2, wherein each of the first and second front link arms extends between the first and second pivot axes at an angle, and wherein extension and retraction of the linear actuator changes the angle.

4. The exercise machine according to claim 3, wherein changing the angle changes a fore-aft range of motion through which a respective one of the first and second rocker arm pivots with respect to the frame during the striding exercise motion.

5. The exercise machine according to claim 1, wherein each of the first and second adjustment devices comprises a linear actuator having a first end coupled to a respective one of the first and second front link arms and a second end coupled to a respective one of the first and second pedal members.

6. The exercise machine according to claim 5, wherein each adjustment device extends along an adjustment device axis that intersects the front link arm between the first and second pivot axes.

7. The exercise machine according to claim 5, wherein each adjustment device is coupled to a respective one of the first and second pedal members above and rearwardly of the second pivot axis.

8. The exercise machine according to claim 5, wherein each adjustment device is coupled to a respective one of the first and second pedal members via a supporting bracket that extends upwardly from the forward portion of the respective one of the first and second pedal members.

9. The exercise machine according to claim 1, wherein the frame has a front frame portion and a rear frame portion; wherein the first and second pedal members each having a front pedal portion, a rear pedal portion, and the foot pad is located between the front and rear pedal portions; wherein the first and second rocker arms are pivotally coupled to the front frame portion; wherein the first and second adjustment devices are coupled to the front pedal portions of the first and second pedal members, respectively, and configured to actively adjust and set a position of the first and second pedal members relative to the first and second rocker arms, which thereby changes a shape of the elliptical path; further comprising first and second crank arms pivotally coupled to the rear frame portion; and further comprising first and second rear link arms that pivotally couple the rear pedal portions to the first and second crank arms, respectively, and thereby facilitate adjustment of the first and second pedal members relative to the first and second crank arms when the position of the first and second pedal members relative to the first and second rocker arms is adjusted, and to facilitate movement of rear pedal portions relative to the first and second crank arms during the striding exercise motion.

10. The exercise machine according to claim 9, wherein the first and second crank arms have a first end portion pivotally coupled to the rear frame portion at a common crank axis and a second end portion pivotally coupled to the first and second rear link arms, respectively, at a crank-link arm pivot axis, and wherein the first and second crank arms both pivot about the common crank axis.

11. The exercise machine according to claim 10, wherein the first and second link arms have a first end portion pivotally coupled to the rear portion of the first and second pedal members, respectively, at a pedal-link arm pivot axis, and a second end portion pivotally coupled at the crank-link arm pivot axis to the first and second crank arms, respectively.

12. The exercise machine according to claim 11, wherein the pedal-link arm pivot axis is located vertically below the common crank axis.

13. The exercise machine according to claim 11, wherein the pedal-link arm pivot axis is located vertically above the common crank axis.

14. The exercise machine according to claim 1, further comprising first and second handle members for manual engagement during the striding exercise motion, wherein the first and second handle members are pivotally coupled to the frame.

15. The exercise machine according to claim 14, wherein the first and second handle members have lower end portions coupled to the first and second foot pedal members, respectively.

16. The exercise machine according to claim 1, further comprising a controller that controls the first and second adjustment devices so as to actively adjust the shape of the elliptical path.

17. The exercise machine according to claim 16, wherein the controller is configured to automatically control the first and second adjustment devices so as to actively adjust the shape of the elliptical path without input from a user.

18. The exercise machine according to 16, wherein the controller is configured to control the first and second adjustment devices before, during and after performance of the striding exercise motion.

19. The exercise machine according to claim 16, further comprising a user input device electronically coupled to the controller, wherein a user can actively adjust the shape of the elliptical path via the user input device.

20. The exercise machine according to claim 1, wherein the shape of the elliptical path has a horizontal length that remains constant.

21. The exercise machine according to claim 1, wherein each of the first and second adjustment devices comprises a linear actuator.

22. The exercise machine according to claim 1, wherein each of the first and second adjustment devices comprises a linear actuator having a motor that rotates a positioning screw with respect to an engagement nut, wherein rotation of the positioning screw in a first direction lengthens the linear actuator and wherein opposite rotation of the positioning screw in a second direction shortens the linear actuator.

23. An exercise machine for performing a striding exercise motion, the exercise machine comprising: a frame; first and second pedal members; first and second foot pads on the first and second pedal members, respectively, each of the first and second foot pads being configured to move in an elliptical path during the striding exercise motion; first and second rocker arms pivotally coupled to the frame; first and second adjustment devices configured to actively adjust and set a position of the first and second pedal members relative to the first and second rocker arms, respectively, which thereby changes a shape of the elliptical path; and first and second front link arms that are each pivotally coupled at a first pivot axis to a lower portion of a respective one of the first and second rocker arms, and pivotally coupled at a second pivot axis to a forward portion of a respective one of the first and second pedal members; wherein each of the first and second adjustment devices comprises a linear actuator having a first end coupled to a respective one of the first and second front link arms and a second end coupled to a respective one of the first and second pedal members; and wherein the first end of each of the first and second adjustment devices is coupled to the respective one of the first and second front link arms at a first adjustment device pivot axis and wherein the second end of each of the first and second adjustment devices is coupled to the respective one of the first and second pedal members at a second adjustment device pivot axis.

24. The exercise machine according to claim 23, wherein the first and second adjustment device pivot axes are located vertically between the first and second pivot axes.

25. An exercise machine for performing a striding exercise motion, the exercise machine comprising: a frame; first and second pedal members; first and second foot pads on the first and second pedal members, respectively, wherein the first and second foot pads are configured to move in respective elliptical paths during the striding exercise motion; first and second rocker arms pivotally coupled to the frame, wherein the first and second pedal members depend from and pivot along with the first and second rocker arms relative to the frame; first and second adjustment devices configured to actively adjust and set a position of the first and second pedal members relative to the first and second rocker arms, respectively, which thereby changes a shape of the elliptical paths, respectively, wherein each of the first and second adjustment devices comprises a linear actuator having a first end that is coupled to a respective one of the first and second rocker arms and a second end that is coupled to a respective one of the first and second pedal members.

26. The exercise machine according to claim 25, wherein the first end of the linear actuator is pivotally coupled to the respective one of the first and second rocker arms and wherein the second end of the linear actuator is fixedly coupled to the respective one of the first and second pedal members.

27. The exercise machine according to claim 25, wherein the linear actuator comprises a motor that rotates a positioning screw to thereby cause linear movement of a carriage.

28. The exercise machine according to claim 27, wherein the carriage is coupled to the one of the first and second rocker arms such that rotation of the positioning screw moves the carriage and adjusts the position of the one of the first and second pedal members relative to the one of the first and second rocker arms.

29. The exercise machine according to claim 28, wherein the carriage further comprises a bushing that rides along a support bar positioned parallel to the positioning screw.

30. The exercise machine according to claim 29, wherein the linear actuator is contained within a housing.

31. An exercise machine for performing a striding exercise motion, the exercise machine comprising: a frame having a front frame portion and a rear frame portion; first and second pedal members each having a front pedal portion, a rear pedal portion, and a foot pad located between the front and rear pedal portions and being configured to move in an elliptical path during the striding exercise motion; first and second rocker arms pivotally coupled to the front frame portion; first and second adjustment devices coupled to the front pedal portions of the first and second pedal members, respectively, and configured to actively adjust and set a position of the first and second pedal members relative to the first and second rocker arms, which thereby changes a shape of the elliptical path; first and second crank arms pivotally coupled to the rear frame portion; first and second rear link arms that pivotally couple the rear pedal portions to the first and second crank arms, respectively, and thereby facilitate adjustment of the first and second pedal members relative to the first and second crank arms when the position of the first and second pedal members relative to the first and second rocker arms is adjusted, and to facilitate movement of rear pedal portions relative to the first and second crank arms during the striding exercise motion; and first and second crank extensions that axially extend from the second end portions of the first and second crank arms, respectively, wherein the first and second crank extensions remain parallel to the first and second crank arms as the first and second crank arms pivot with respect to the common crank axis.

32. The exercise machine according to claim 31, further comprising first and second guide members each having a first guide end portion pivotally coupled to the first and second pedal members, respectively, and a second guide end portion pivotally coupled to the first and second crank extensions, respectively.

33. The exercise machine according to claim 32, further comprising first and second pedal extension members extending from the rear pedal portions of the first and second pedal members, respectively, wherein the second guide end portions are pivotally coupled to the first and second crank extension members, respectively.

34. An exercise machine for performing a striding exercise motion, the exercise machine comprising: a frame; first and second pedal members; first and second foot pads on the first and second pedal members, respectively, wherein the first and second foot pads are configured to move in respective elliptical paths during the striding exercise motion; first and second rocker arms pivotally coupled to the frame, wherein the first and second pedal members depend from and pivot along with the first and second rocker arms relative to the frame; first and second adjustment devices configured to actively adjust and set a position of the first and second pedal members relative to the first and second rocker arms, respectively, which thereby changes a shape of the elliptical paths, respectively; and a controller configured to actively adjust and set the position of the first and second pedal members relative to the first and second rocker arms, respectively, based upon an input from an operator of the exercise machine wherein each of the first and second adjustment devices comprises a linear actuator having a first end that is coupled to a respective one of the first and second rocker arms and a second end that is coupled to a respective one of the first and second pedal members.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The present disclosure is described with reference to the following Figures. The same numbers are used throughout the Figures to reference like features and like components. Unless otherwise specifically noted, articles depicted in the drawings are not necessarily drawn to scale.

(2) FIG. 1 is a perspective view of a first embodiment of an exercise machine according to the present disclosure.

(3) FIG. 2 is a perspective view of a lower portion of the first embodiment having outer shrouds removed.

(4) FIG. 3 is an exploded view of portions of the first embodiment.

(5) FIG. 4 is a side view of the first embodiment, showing an elliptical path of a foot pad when adjustment devices on the foot pedal members are retracted.

(6) FIG. 5 is a view like FIG. 4, showing the elliptical path when the adjustment devices are partially extended.

(7) FIG. 6 is a view like FIG. 4, showing the elliptical path when the adjustment devices are fully extended.

(8) FIG. 7 is a perspective view of a second embodiment of an exercise machine according to the present disclosure.

(9) FIG. 8 is a side view of the second embodiment, showing an elliptical path of a foot pad when the adjustment devices on the foot pedal members are retracted.

(10) FIG. 9 is a view like FIG. 8, showing the elliptical path when the adjustment devices are partially extended.

(11) FIG. 10 is a view like FIG. 8, showing the elliptical path when the adjustment devices are fully extended.

(12) FIG. 11 is a perspective view of a third embodiment of an exercise machine according to the present disclosure.

(13) FIG. 12 is an exploded view of portions of the third embodiment.

(14) FIG. 13 is a side view of the third embodiment, showing an elliptical path of a foot pad when the adjustment devices on the foot pedal members are retracted.

(15) FIG. 14 is a view like FIG. 13, showing the elliptical path when the adjustment devices are partially extended.

(16) FIG. 15 is a view like FIG. 13, showing the elliptical path when the adjustment devices are fully extended.

(17) FIG. 16 is a closer view of rear portions of the first, second and third embodiments.

(18) FIG. 17 is a perspective view of a fourth embodiment of an exercise machine according to the present disclosure.

(19) FIG. 18 is a closer view of rear portions of the fourth embodiment.

DETAILED DESCRIPTION OF THE DRAWINGS

(20) It should be understood at the outset that, although exemplary embodiments are illustrated in the figures and described below, the principles of the present disclosure may be implemented using any number of techniques, whether currently known or not. The present disclosure should in no way be limited to the exemplary implementations and techniques illustrated in the drawings and described below.

(21) During research and development, the present inventor determined that it would be desirable to provide an exercise machine for performing an elliptical striding motion, wherein the user's foot path and/or orientation of the elliptical path traveled by the machine can be adjusted and set based upon the user's preferences and/or based upon a certain exercise routine. The present inventor further determined that it would be desirable to provide such an exercise machine with a robust design that avoids use of tracks or linear rollers/guides, which can be noisy and expensive, and subject to breakdown. The present inventor had determined it would be desirable to design such a machine with a small footprint compared to prior art machines. The present disclosure is a result of these endeavors.

(22) FIG. 1 depicts a first embodiment of an exercise machine 20a for performing a striding exercise motion. The exercise machine 20a includes a frame 22 having a front frame portion 24 with laterally extending leg braces 26 and a rear frame portion 28 with laterally extending leg braces 30. A base member 31 longitudinally extends from the front frame portion 24 to the rear frame portion 28. A support column 32 vertically upwardly extends from the front frame portion 24 and supports stationary handles 34 for manually grasping by a user performing the striding exercise motion. A stationary shaft 36 (see FIG. 6) laterally extends from the support column 32 at a location proximate to the stationary handles 34. The type and configuration of the frame 22 and stationary handles 34 is merely exemplary and can vary from what is shown.

(23) Referring to FIGS. 1 and 2, first and second rocker arms 38a, 38b have upper ends that are attached to and pivotally depend from opposite sides of the stationary shaft 36 relative to the support column 32. The upper ends have bearings that are journaled about the stationary shaft 36 and configured so that the rocker arms 38a, 38b can rotate back and forth with respect to the stationary shaft 36 as the user performs the striding exercise motion. The exercise machine 20a further has first and second pedal members 44a, 44b that longitudinally extend with respect to the frame 22. The pedal members 44a, 44b support first and second foot pads 46a, 46b that support the user's feet during the striding exercise motion. The type and configuration of the foot pads 46a, 46b can vary from what is shown. Examples of suitable foot pads are fully described in commonly-owned U.S. patent application Ser. No. 15/693,724, filed Sep. 1, 2017. In general, the foot pads 46a, 46b include a tread surface for engagement by the user's feet and a base frame that supports the tread surface with respect to the respective pedal members 44a, 44b. Generally, as will be further described herein below, the exercise machine 20a is configured such that the foot pads 46a, 46b and the corresponding user's feet move in an elliptical path during the striding exercise motion. The exercise machine 20a is further configured so that the user and/or a controller associated with the machine 20a can actively vary the shape of the elliptical path, as will be further described with reference to FIGS. 4-6.

(24) Referring to FIGS. 2 and 3, first and second front link arms 52a, 52b are pivotally coupled at a first pivot axis 54 to a lower portion of a respective one of the rocker arms 38a, 38b, and pivotally coupled at a second pivot axis 58 to a forward portion of a respective one of the pedal members 44a, 44b. In the illustrated example, the front link arms 52a, 52b each include a frame member 61 having opposing sides 62a, 62b and top and bottom pivot pins 64, 66 that extend through cross bores 68, 70 in the respective one of the rocker arms 38a, 38b and the respective one of the pedal members 44a, 44b. Additional supporting ribs 72 extend between the opposing sides 62a, 62b of the frame member 61. The front link arms 52a, 52b can be a casting, weldment, and/or the like. The configuration of the front link arms 52a, 52b can vary from what is shown, as will be evident from the description herein below regarding the third embodiment.

(25) With continued reference to FIGS. 2 and 3, first and second supporting brackets 74a, 74b extend upwardly from the forward portion of the respective pedal members 44a, 44b. In the illustrated example, the supporting brackets 74a, 74b each include a frame member 76 having opposing sides 78a, 78b coupled to the corresponding pedal members 44a, 44b. A rib 80 extends between the sides 78a, 78b and provides stability.

(26) With continued reference to FIGS. 2 and 3, first and second adjustment devices 82a, 82b are specially configured to adjust and set the position of the pedal members 44a, 44b relative to the rocker arms 38a, 38b, respectively, which as explained further herein below changes a shape of the above-noted elliptical path. More particularly, the first and second adjustment devices 82a, 82b are specially configured to adjust and set the position of the first pivot axis 54 relative to the pedal members 44a, 44b. In the illustrated embodiment, each of the adjustment devices 82a, 82b includes a linear actuator 84 that is extendable and retractable, which as explained further herein below with reference to FIGS. 4-6 thereby adjusts the relative position of the first and second pivot axes 54, 58. The linear actuator 84 includes a conventional bi-directional electric motor 86 mounted to a gearbox 88. The gearbox 88 is pivotally coupled to a respective front link arm 52a, 52b at a pivot pin 89 extending between the sides 62a, 62b of the frame member 61. Thus, each of the adjustment devices 82a, 82b are coupled to the respective front link arms 52a, 52b at a respective first adjustment device pivot axis 53 (see FIG. 2). The type and configuration of the linear actuator 84 can vary from what is shown and described. In other examples, the linear actuator 84 could include a worm gear with a right-angle motor.

(27) The gearbox 88 contains a gear set (not shown) that connect an output shaft (not shown) of the electric motor 86 to a first end portion of a positioning screw 90, which is disposed in the gearbox 88. Operation of the electric motor 86 causes rotation of the motor output shaft, which in turn operates the gear set, which in turn causes rotation of the positioning screw 90. A second end portion 71 of the positioning screw 90 is engaged via a threaded engagement with an engagement nut 92 that is pivotally mounted within the respective first or second supporting brackets 74a, 74b. Thus, each adjustment device 82a, 82b is coupled to a respective one of the pedal members 44a, 44b at a second adjustment device pivot axis 55 (see FIG. 2), which is located above and rearwardly of the second pivot axis 58. The adjustment device pivot axes 53, 55 are located vertically between the first and second pivot axes 54, 58. Each of the adjustment devices 82a, 82b extends along a respective adjustment device axis 94 (see FIG. 2), which in this example exactly and/or nearly intersects with the first pivot axis 54. This can vary from what is shown, as will be evident from description of the second embodiment shown in FIGS. 7-10 hereinafter below.

(28) With continued reference to FIGS. 2 and 3, operation of the electric motor 86 in a first direction causes rotation of the positioning screw 90 about its own axis in a first direction and operation of the electric motor 86 in an opposite direction causes opposite rotation of the positioning screw 90 about its own axis in an opposite, second direction. Rotation of the positioning screw 90 in the first direction causes the positioning screw 90 to travel outwardly relative to the engagement nut 92, thus lengthening the linear actuator 84. Rotation of the positioning screw 90 in the second direction causes the positioning screw 90 to travel further into engagement with the engagement nut 92, thus shortening the linear actuator 84.

(29) Referring to FIGS. 1 and 2, the exercise machine 20a further includes first and second handle members 96 that are configured for manual engagement during the striding exercise motion. The first and second handle members 96 are pivotally coupled to the frame 22 along the stationary shaft 36 and have upper handle portions 98 that extend upwardly from the stationary shaft 36 from respective pivot bearings 100 journaled on and pivotable about the stationary shaft 36. In this way, the upper handle portions 98 are pivotable forwardly and rearwardly with respect to the stationary shaft 36 during the striding exercise motion. The handle members 96 each have a lower end portion 102 that is pivotally coupled to an L-shaped connecting link 103, which in turn is coupled to a corresponding front portion of one of the pedal members 44a, 44b, and more specifically along a handle member pivot axis 104 (see FIG. 2) that is located rearwardly of the second pivot axis 58. By coupling to the first and second pedal members 44a, 44b, the range of motion of the handle members 96 is virtually unaffected by changing the elliptical path 150 (FIGS. 4-6). In other words, adjustment of the position of the pivot axis 54 relative to the respective pedal member 44a, 44b via the adjustment device 82a, 82b changes the shape of the ellipse 150, but not the arc or range of motion of the handle members 96. The shape and configuration of the connecting link 103 can vary from what is shown.

(30) Referring now to FIGS. 2, 3, 6, 15 and 16, the rear frame portion 28 supports the rear portions of the respective pedal members 44a, 44b. Specifically, first and second crank arms 110a, 110b each have a first end portion 112 that is pivotally coupled to a stanchion 114 that upwardly extends on the rear frame portion 28. The crank arms 110a, 110b are keyed together so that they remain 180 degrees apart from each other during operation of the exercise machine 20a. The first end portions 112 of the crank arms 110a, 110b are coupled together along a common crank axis 116. First and second rear link arms 118a, 118b pivotally couple the crank arms 110a, 110b to the rear portions of the respective pedal members 44a, 44b. As further explained herein below, the rear link arms 118a, 118b facilitate adjustment of the pedal members 44a, 44b relative to the crank arms 110a, 110b when the position of the pedal members 44a, 44b relative to the rocker arms 38a, 38b is adjusted via the adjustment devices 82a, 82b. The crank arms 110a, 110b each have a second end portion 120 that is pivotally coupled to a respective one of the rear link arms 118a, 118b. The rear link arms 118a, 118b each have a first end portion 122 that is pivotally coupled to the rear portion of the pedal members 44a, 44b at a pedal-link arm pivot axis 124, and a second end portion 126 that is pivotally coupled to the first and second crank arms 110a, 110b along a pedal-crank pivot axis 125. In this example, the pedal-link arm pivot axis 124 is located vertically below the common crank axis 116 so that the rear link arms 118a, 118b are subjected to tension forces from the weight of the user standing on the foot pads 46a, 46b; however this can vary, as will be evident from the alternate embodiment described herein below with respect to FIGS. 16 and 17.

(31) With continued reference to FIGS. 2, 3, 6, 15 and 16, first and second crank extensions 130a, 130b axially extend from the second end portions 120 of the crank arms 110a, 110b, respectively. The crank extensions 130a, 130b are coupled to the crank arms 110a, 110b via a keyed shaft 131 on the respective crank arms 110a, 110b and a corresponding slotted keyhole 134 formed in the crank extensions 130a, 130b. Thus, the crank extensions 130a, 130b rotate with and remain parallel with the crank arms 110a, 110b, as the crank arms 110a, 110b are rotated about the common crank axis 116.

(32) The rear portions of the pedal members 44a, 44b each have an upwardly-extending extension member 128 that extends transversely upwardly relative to the respective pedal member 44a, 44b. First and second guide members 136a, 136b each have a first guide end portion 138 pivotally coupled to the extension member 128 on a respective rear portion of the respective pedal member 44a, 44b and a second guide end portion 140 pivotally coupled to a respective one of the crank extensions 130a, 130b. A conventional resistance mechanism 142 (e.g., hybrid generator-brake) is mounted to the frame 22 at the rear frame portion 28 and coupled to the crank arms 110a, 110b so as to provide resistance to rotation of the crank arms 110a, 110b about the common crank axis 116 and optionally generating power based upon the rotation for powering, for example, the electric motor 86. The resistance mechanism 142 is a conventional item and thus is not further described herein for the sake of brevity. A suitable resistance mechanism 142 is the FB 6 Series sold by Chi Hua.

(33) Referring to FIG. 1, the exercise machine 20a further includes a controller 144 that is configured to control the adjustment devices 82a, 82b so as to actively adjust the shape of the elliptical path. Optionally, the controller 144 can be powered by the resistance mechanism 142, and/or a battery, and/or another electric power source. In the illustrated example, the controller 144 is configured to control the electric motor 86 and particularly to cause the electric motor 86 to operate and cause rotation of the positioning screw 90, as described herein above. The controller 144 can include a programmable processor, a memory, and an input/output device. The processor is communicatively connected to a computer readable medium that includes volatile or nonvolatile memory upon which computer readable code is stored. The processor can access the computer readable code on the computer readable medium, and upon executing the code, can send signals to carry out functions according to the methods described herein below. In the illustrated example, execution of the code allows the controller 144 to control (e.g. actuate) the electric motor 86.

(34) The exercise machine 20a further includes a user input device 146. Optionally, the user input device 146 can be powered by the resistance mechanism 142, and/or a battery, and/or another electric power source. The type and configuration of the user input device 146 can vary from what is shown. In the illustrated example, the user input device 146 mounted on the frame 22 and vertically extends above the stationary handles 34 so that a user standing on the foot pads 46a, 46b can view and manually actuate the user input device 146. In this example, the user input device 146 includes a touch screen that displays operating characteristics of the exercise machine 20a and allows the user to manually input commands to the controller 144, in particularly to command the controller 144 to actuate the adjustment devices 82a, 82b via the electric motor 86. This allows the user to actively adjust the shape of the noted elliptical path of travel of the foot pads 46a, 46b, as further described herein below.

(35) FIGS. 4-6 depict operation of the exercise machine 20a in positions of use, in which the adjustment devices 82a, 82b are retracted (FIG. 4), partially extended (FIG. 5) and fully extended (FIG. 6). In each position, the elliptical path 150 traveled by the foot pads 46a, 46b has the same horizontal length. As shown in the Figures, the adjustment devices 82a, 82b advantageously facilitate infinite adjustment of footpath (ellipse) inclination and/or orientation and/or angle. This can be accomplished without the use of ramps or guides. The horizontal length (i.e. the axial length from front to back with respect to the exercise machine 20) of the elliptical path 150 traveled by the foot pads 46a, 46b remains constant before and after operation of the adjustment devices 82a, 82b; however in each position of the adjustment devices 82a, 82b, the shape of the elliptical path 150 is different. In particular, the adjustment devices 82a, 82b facilitate adjustment and setting of the location of the pedal members 44a, 44b relative to the rocker arms 38a, 38b. As these relative positions are changed, so does the vertical displacement of the first pivot axis 54 and second pivot axis 58, which changes shape of the elliptical path 150 along which the foot pads 46a, 46b move.

(36) As described herein above, the controller 144 can be actuated by the user via the user input device 146 to thereby actively adjust and set the adjustment devices 82a, 82b to thereby change the shape of the elliptical path 150. Optionally, the controller 144 can also or alternately be programmed to automatically change the elliptical path 150 depending upon an operational or other characteristic of the exercise machine 20a and/or an exercise routine saved in the memory of the controller 144. In some examples, changes to the elliptical path 150 can occur before the exercise routine begins. In some examples, changes to the elliptical path 150 can occur during the exercise routine or after the exercise routine ends.

(37) As shown in FIGS. 4-6, actively adjusting the adjustment devices 82a, 82b actively adjusts and sets a relative position of the first and second pivot axes 54, 58. Stated another way, actively adjusting the adjustment devices 82a, 82b actively changes an angle at which the front link arms 52a, 52b extend between the first and second adjustment device pivot axes 53a, 53b. Changing this angle also causes a change in a fore-aft range of motion through which each of the rocker arms 38a, 38b pivot with respect to the frame 22 during the striding exercise motion. As described above, adjustment of the position of the pedal members 44a, 44b relative to the rocker arms 38a, 38b is facilitated at the rear frame portion 28 by pivoting of the rear link arms 118a, 118bwithout the need for linear guides or other similar bearings. More specifically, the rear link arms 118a, 118b are pivotally coupled to the pedal members 44a, 44b and thus adjustment of the position of the pedal members 44a, 44b is accommodated by pivoting of the rear link arms 118a, 118b about the respective pedal-link arm axis 124 and pedal-crank pivot axis 125.

(38) FIGS. 7-10 depict a second embodiment of the exercise machine 20b, in which the adjustment devices 82a, 82b each extend along respective adjustment device axis 94 that intersects with the respective front link arm 52a, 52b between the first and second pivot axes 54, 58. Like reference numbers are applied in accordance with the description herein above regarding the first embodiment. Due to the orientation of the adjustment device axis 94, the second embodiment of the exercise machine 20b places more load on the linear actuator 84; however it requires less travel length for the linear actuator 84 to enact a change in the shape of the elliptical path 150 compared to the first embodiment of the exercise machine 20a.

(39) FIGS. 11-14 depict a third embodiment of the exercise machine 20c, in which the adjustment devices are pivotally coupled to a respective one of the rocker arms 38a, 38b and fixedly coupled to a respective one of the pedal members 44a, 44b. In this example the linear actuator 84 includes a carriage 152 that is pivotally coupled to the respective rocker arm 38a, 38b and engaged via a threaded connection with the positioning screw 90. Actuation of the linear actuator 84 via actuation of the electric motor 86 causes rotation of the positioning screw 90 (as described herein above) which thereby causes axial movement of the carriage 152 along the positioning screw 90. This adjusts the relative positions of the respective rocker arm 38a, 38b and pedal member 44a, 44b, which thereby adjusts the elliptical path 150, as shown in FIGS. 13-15. In the illustrated example, the positioning screw 90 is mounted to a support housing 154 that is fixed to the forward end portion of the respective pedal member 44a, 44b. The support housing 154 also has smooth stationary shafts 156 that are disposed on opposite sides of the positioning screw 90. The carriage 152 has bearing passages 158 that slide along the smooth stationary shafts 156 as the positioning screw 90 is rotated. The carriage 152 has a pivot pin 160 that is received in a pivot bore 162 through the lower end portion of the respective rocker arm 38a, 38b. The configuration of the linear actuator 84 can vary from what is shown and described. The configuration of the carriage 152 and support housing 154 can vary from what is shown.

(40) FIGS. 17 and 18 depict a fourth embodiment of the exercise machine 20d wherein the pedal-link arm pivot axis 124 is located vertically higher than the common crank axis 116 in an orientation where the rear link arms 118a, 118b are subjected to compression forces from the weight of the user. The rear end portion of the pedal member 44a, 44b includes L-shaped elbow 164 that positions the pedal-link arm axis 124 higher than the common crank axis 116 and this example omits the extension member 128, which is present in the first embodiment and which is replaced by a shorter member or bracket. Contrary to the previous embodiments, the weight of the user standing on the foot pads 46a, 46b places compression forces on the rear link arms 118a, 118b rather than tension forces.

(41) Thus it can be seen that examples in the present disclosure facilitate active adjustment of the shape of the elliptical exercise motion without the need for rollers and tracks, or linear bearings and guides, which can require additional maintenance and cause undesirable noise.

(42) Although specific advantages have been enumerated above, various embodiments may include some, none, or all of the enumerated advantages. Other technical advantages may become readily apparent to one of ordinary skill in the art after review of the following figures and description. Modifications, additions, or omissions may be made to the systems, apparatuses, and methods described herein without departing from the scope of the disclosure. For example, the components of the systems and apparatuses may be integrated or separated. Moreover, the operations of the systems and apparatuses disclosed herein may be performed by more, fewer, or other components and the methods described may include more, fewer, or other steps. Additionally, steps may be performed in any suitable order. As used in this document, each refers to each member of a set or each member of a subset of a set.

(43) To aid the Patent Office and any readers of any patent issued on this application in interpreting the claims appended hereto, applicants wish to note that they do not intend any of the appended claims or claim elements to invoke 35 U.S.C. 112(f) unless the words means for or step for are explicitly used in the particular claim.