Range of motion limiting device for shuttle carriage

Abstract

A range of motion limiting device, in one example comprising a first armature configured to engage a carriage moving on at least one rail having a first surface and a second surface transversely offset from the first surface of the rail. Also disclosed is an example utilizing a first bumper adjacent the first longitudinal end of the first armature. The first bumper extending transversely from the first transverse side of the first armature, optionally having a distal end with a non-slip surface engaging the first surface of a rail. Also disclosed is a second bumper longitudinally offset from the first bumper on the first armature, the second bumper extending transversely from the second transverse side of the first armature, also optionally having a distal end with a non-slip surface engaging the second surface of the rail.

Description

BACKGROUND OF THE DISCLOSURE

Field of the Disclosure

Disclosed herein is a range of motion limiting device configured to be placed in a rail or rails of a frame to limit the longitudinal movement of a carriage traveling on the rail(s). In one example, the device is used to limit the range of motion of a physical therapy or exercise apparatus.

BRIEF SUMMARY OF THE DISCLOSURE

Disclosed herein are several examples of a range of motion limiting device. One example comprising: a first armature having a first longitudinal end, a second longitudinal end; a first transverse side, a second transverse side; the first longitudinal end of the first armature configured to engage a carriage moving on at least one rail having a first surface and a second surface transversely offset from the first surface of the at least one rail; a first bumper adjacent the first longitudinal end of the first armature, extending transversely from the first transverse side of the first armature; the first bumper having a distal end with a non-slip surface engaging the first surface of the at least one rail; a second bumper longitudinally offset from the first bumper on the first armature, the second bumper extending transversely from the second transverse side of the first armature; the second bumper having a distal end with a non-slip surface engaging the second surface of the at least one rail; and the range of motion limiting device configured such that force exerted by the carriage is transmitted to the first armature, wherein this force rotationally biases the first bumper against the first surface of the at least one rail and the second bumper against the second surface of the at least one rail in a camming action, prohibiting further longitudinal movement of the carriage toward the first armature.

The range of motion limiting device may further comprise a lateral cross member having a first end affixed to the first longitudinal armature and extending laterally therefrom.

The range of motion limiting device may further comprise a second longitudinal armature affixed to a second end of the lateral cross member, the second longitudinal armature comprising: a second armature having a first longitudinal end, a second longitudinal end; a first transverse side, a second transverse side; the first longitudinal end of the second armature configured to engage the carriage; a first bumper adjacent the first longitudinal end of the second armature, extending transversely from the first transverse side of the second armature; the first bumper having a distal end with a non-slip surface engaging the first surface of the at least one rail; a second bumper longitudinally offset from the first bumper on the second armature, the second bumper extending transversely from the second transverse side of the second armature; the second bumper having a distal end with a non-slip surface engaging the second surface of the at least one rail; and the range of motion limiting device configured such that force exerted by the carriage is transmitted to the second armature, wherein this force rotationally biases the first bumper against the first surface of the at least one rail and the second bumper against the second surface of the at least one rail in a camming action, prohibiting further longitudinal movement of the carriage toward the second armature.

The range of motion limiting device may be arranged wherein the cross member comprises: a first lateral end connected to the first armature; a second lateral end connected to the second armature; a median portion extending between the first lateral end and the second lateral end; and wherein the median portion is transversely offset from the first armature and the second armature.

The range of motion limiting may be arranged wherein the cross member comprises: a first extension having a first end at the first armature and a second end at the median portion; the first extension at an angle of between 20° and 65° to the median portion; a second extension having a first end at the second armature and a second end at the median portion; and the first extension at an angle of between 20° and 65° to the median portion.

The range of motion limiting device may be arranged wherein the lateral cross member is configured to directly contact the carriage.

The range of motion limiting device may be arranged wherein the lateral cross member directly contacts the carriage.

The range of motion limiting device may be arranged wherein the lateral cross member is comprised of spring steel.

The range of motion limiting device may further comprise a reinforcing member extending from the median portion and configured to add transverse rigidity to the median portion.

The range of motion limiting device may be arranged wherein the reinforcing member is a unitary structure with the median portion, extending therefrom at a fold.

The range of motion limiting device may further comprise: a stiffener affixed to the first armature, the stiffener configured to reduce longitudinal flexing of the first armature; and a stiffener affixed to the second armature, the stiffener configured to reduce longitudinal flexing of the second armature.

The range of motion limiting device may be arranged where the non-slip surface of the second bumper is elastic.

The range of motion limiting device may be arranged wherein the non-slip surface of the first bumper is elastic.

The range of motion limiting device may further comprise a stiffener affixed to the first armature, the stiffener configured to reduce longitudinal flexing of the first armature.

The range of motion limiting device may be arranged wherein the carriage is a component of a shuttle table.

In another example is disclosed a range of motion limiting device comprising: a first armature having a first longitudinal end, a second longitudinal end; a first transverse side, a second transverse side; the first longitudinal end of the first armature contacting a carriage moving on at least one rail having a first surface and a second surface transversely offset from the first surface of the at least one rail; a first bumper adjacent the first longitudinal end of the first armature, extending transversely from the first transverse side of the first armature; the first bumper having a distal end with a non-slip surface in contact with the first surface of the at least one rail; a second bumper longitudinally offset from the first bumper on the first armature, the second bumper extending transversely from the second transverse side of the first armature; and the second bumper having a distal end with a non-slip surface in contact with the second surface of the at least one rail.

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS

FIG. 1 is a side perspective view of one example of a prior art exercise table to which the disclosed range of motion limiting device may be configured.

FIG. 2 is a highly schematic side perspective view of a plurality of rails forming part of a frame incorporating a range of motion limiting device as disclosed.

FIG. 3 is a highly schematic view of the rails and carriage to which may be attached the disclosed range of motion limiting device.

FIG. 4 is a side hidden line view of the example shown in FIG. 1.

FIG. 5 is a front perspective view of the range of motion limiting device shown in FIG. 1.

FIG. 6 is a right-side view of the range of motion limiting device shown in FIG. 1.

FIG. 7 is a left side view of the range of motion limiting device shown in FIG. 1.

FIG. 8 is a front view of the range of motion limiting device shown in FIG. 1.

FIG. 9 is a top view of the range of motion limiting device shown in FIG. 1.

FIG. 10 is a rear view of the range of motion limiting device shown in FIG. 1.

FIG. 11 is a bottom view of the range of motion limiting device shown in FIG. 1.

DETAILED DESCRIPTION OF THE DISCLOSURE

Disclosed herein is a range of motion limiting device configured to be placed in a rail or rails of a frame to limit the longitudinal movement of a carriage traveling on the rail(s).

In some apparatuses, for example in the field of therapy, shuttle, or exercise tables 20 as shown in FIG. 1 as well as those disclosed in U.S. Pat. Nos. 6,383,122 B1, 7,682,297 B2, 7,871,358 B2, each incorporated herein by reference, it is often desired to limit the range of motion or travel 22 of a carriage 24 between a footward end 26 and a headward end 28 of a frame 30 upon which the carriage 24 travels. In some applications, cords, bands, and other length adjustable static and elastic members may be attached between the frame 30 and the carriage to control, bias, or limit the range of motion or travel 22 of the carriage 24 on the frame 30. Several of those references listed above refer to such systems. Disclosed herein is an apparatus which is positioned against (between) facing surfaces of a rail 32 or rails 32a/32b wherein contact of the carriage 24 against the rails 32 of such a range of motion limiting device 34 wedges or in other terms creates a camming action between facing surfaces 36a and 37a (see FIG. 2) of the rail 32. This camming action prohibiting further movement of the carriage 24 in a longitudinal direction as the carriage 24 presses against the range of motion limiting device 34.

To aid in description, an axes system 10 is disclosed herein comprising a longitudinal axis 12 parallel to the armature(s) of the range of motion limiting device 34. Also disclosed is a transverse axis 14 perpendicular to the armature(s). Also disclosed is a lateral axis 16 lying perpendicular to the plane of travel of the carriage 24 and the transverse axis 14. An oblique axis 18 is disclosed, parallel to the line of travel 22 of the carriage 24. As will be disclosed herein, in use the longitudinal axis 12 is not necessarily parallel to the oblique axis 18.

In use, a user will be supported by the carriage 24, by lying, sitting, kneeling thereupon and then press against the kick plate 38 to move themselves and the carriage 24 towards the headward end of the frame 30. Commonly the user's feet will engage the kick plate 38 and the user will be biased away from the kick plate 38 as they press against the kick plate 38 with sufficient force to overcome friction, gravity resistance, and the force of any resilient members (e.g., elastic cords). To add rigidity, the kick plate 38 is commonly fixed to the frame 30 by way of a kick plate support 40 fixed to the kick plate 38 and attached to the frame 30. To aid in use and comfort, the frame 30 may be raised above the floor 40 by way of one or more legs 42. A therapist or other practitioner may devise an exercise regimen for a user, the user then employing the shuttle table 20 to facilitate the exercise regimen. In some exercises, it may be desired to limit the movement of the carriage 24 on the frame 30 either towards the headward end 28 and/or the footward end 26.

Disclosed herein are several examples of a range of motion limiting device 34 which is specifically configured to be fitted to the frame 30 at either the footward end 26 or the headward end 28.

In one example, the range of motion limiting device 34 as seen in FIG. 5 comprises a first armature 46a having a first longitudinal end 48a, a second longitudinal end 50a; a first transverse side 52a, and a second transverse side 56a. To aid in description, general terms will utilize a numeric label, and specific elements will use an alphabetic identifier. For example, the rails are labeled as 32, while specific rails (e.g., right and left rails) are identified as 32a and 32b.

In one example, the first armature 46a is configured to be pressed against by the carriage 24 moving on at least one rail 32 having a first surface 36a, and a transversely facing second surface 37a. The second surface 37a transversely offset 58 from the first surface 36a of the rail 32. As the armature 46 is thus longitudinally pressed against by the carriage 24, the armature 46 is rotationally forced to a camming or wedging action against the surfaces 36a-37a of the rail 32. Additional force exerted by the carriage 24 will increase the camming action, tending to further resist forces exerted by the carriage 24 on the first armature 46 by camming or wedging between the surfaces 36a-37a of the rail 32.

Also disclosed is an example utilizing a first bumper 60 attached to the first armature 46a adjacent the first longitudinal end 48a of the first armature 46a. The first bumper 60 extends from the first transverse side 62a of the first armature 46a. The first bumper 60a optionally has a distal end 64a configured to press against the surface 36a of the rail and when so pressed prohibit sliding of the range of motion limiting system 34 relative to the rail 32. The distal end 64a in one example having a malleable and/or non-slip surface 66a thereon such as rubber, silicone, plastic, etc. The non-slip surface 66a directly engages the first surface 36 of a rail 32.

Also disclosed is a second bumper 68a longitudinally offset from the first bumper 60a on the first armature 46a. In one example, the second bumper 68a is shown extending transversely 14 from the second transverse side 70a of the first armature 46a in an opposing direction from the first bumper 60a. The second bumper 68a also optionally having a distal end 72a with a malleable and/or non-slip surface 74a engaging the second surface 37 of the rail 32.

In operation, the range of motion limiting device 34 is configured such that force 76 exerted longitudinally by the carriage 24 against the first armature 46a rotationally biases the first bumper 60a against the first surface 36a of the rail 32a and the second bumper 68a against the second surface 37a of the rail 32a in a camming action. This camming action prohibiting further longitudinal movement 78 of the carriage 24 in a direction toward the first armature 46a. In other terms, as most easily understood by looking to the example of FIG. 4, force 76 of the carriage 24 pressing against the range of motion limiting device 34 is translated to a force 80 pressing the second bumper 68a against the surface 37a of the rail 32a. As the bumper 68 may comprise elastic such as rubber, silicone, wood, or other polymeric or natural materials, it may deform slightly as it is compressed. Where the second bumper 68a includes a non-slip surface 82a on the distal end thereof, a transverse offset 86 from the point of contact between the carriage and the range of motion limiting device 34 forms a lever arm such that the force 76, exerted on the range of motion limiting device 34 from longitudinal movement 78 of the carriage 34 presses the bumper 68a against the surface 37, which results in a rotational bias 88 about a pivot 90 or point of contact. This rotational bias 88 presses the first bumper 60a against the surface 36a as a force 92. Where the distal end 64a of the first bumper 60a also comprises a non-slip surface, longitudinal movement is additionally resisted. Addition of force 76 presses the bumpers 68a, 60a with increasing force in a wedging or camming action.

The range of motion limiting device in one example further comprises a lateral cross member 94 having a first end 96a affixed to the first armature 46a and extending laterally therefrom. The range of motion limiting device 34 may further comprise a second armature 46b affixed to a second end 96b of the lateral cross member 94. In one example the second armature 46b is substantially a mirror image of the first armature 46a. The same components may be utilized on the second armature 46b as the first armature 46a, such as a first bumper 60b, second bumper 68b, etc. Many components of the second armature equivalent to a component of the first armature are shown here having an alphabetic identifier “b” where the equivalent component of the first armature has an alphabetic identifier “a”.

The range of motion limiting device 34 as recited herein may further comprise a stiffener 98 (98a, 98b) affixed to the first armature 46a and/or the second armature 46b, each stiffener 98 is configured to reduce longitudinal flexing of the first armature from the first end 48 to the second end 50 in a transverse direction and torsional about the axis of the armature 46. In one example, such as shown in FIG. 11, the first armature 46a, second armature 46b, and lateral cross member 94 may be comprised of a unitary structure, folded or bent to the desired final shape. The material comprising this unitary structure may be structurally insufficient to provide the desired strength and resiliency to the armature 46, the stiffener 98 may be attached thereto. In one example, the first bumpers 60 and second bumpers 68 may be attached to the armature 46 via fasteners 100 and 102 respectively. These fasteners may also function to fasten the stiffener 98 to the associated armature 46.

The range of motion limiting device 34 may be arranged wherein the lateral cross member 94 comprises: a first lateral end 104a connected to the first armature 46a; a second lateral end 104b connected to the second armature 46b; a median portion 106 extending between the first lateral end 104a and the second lateral end 104b. In one example the median portion 106 is transversely offset 108 from the first armature 46a and the second armature 46b. This transverse offset 108 making adjustment, insertion, and manipulation simple, easy, and requiring very little force; as a user may grasp a grasping portion 110 generally clear (substantial clearance there between) of the frame 30 of the shuttle table 20. By so grasping the range of motion limiting device 34, a user will be able to insert one or more of the armatures 46 into one or more corresponding rails 32 and slide the range of motion limiting device into the headward end 28 or footward end 26 of the frame 30 to a position where it is desired that the carriage 24 not pass.

In one example, the transverse offset 108 between the median portion 106 to the first armature 46a and the second armature 46b also increasing the transverse distance 86 between the pivot point 90 and the contact point 112 between the carriage 24 and the range of motion limiting device 34. As previously described, this distance 86 forming a lever arm increasing the camming force in direction 88/92 and countering any longitudinal force 78.

The range of motion limiting device 34 may be arranged wherein the cross member 94 comprises: a first extension 112a having a first end 114a at the first armature 46a with a second end 116a at the median portion 106. In one example, the first extension 112a is at an angle 118a of between 20° and 65° to the median portion 106. In one example, the first extension 112a is a unitary continuous construction with the first armature 46a and/or the median portion 106 extending therefrom at a bend or fold. Similarly, in one example is disclosed a second extension 112b having a first end 114b at the second armature with a second end 116b at the median portion 106. In one example the first extension at an angle 118b of between 20° and 65° to the median portion. In one example, the second extension 112b is a unitary continuous construction with the second armature 46b and/or the median portion 106 extending therefrom at a bend or fold.

The range of motion limiting device 34 may further comprise a reinforcing member 120 extending from the median portion 106 and configured to add transverse rigidity to the median portion 106. The reinforcing member 120 may comprise a unitary structure with the median portion 106. The reinforcing member 120 extending from the median portion 106 at a bend or fold 122. Where the median portion 106 and other components may be made of plate steel or equivalent components, cut, formed, bent, folded, welded, fastened, or adhered together to form the range of motion limiting device 34, the reinforcing member 120 is configured to resist lateral bending, and torsional bending of the median portion.

The range of motion limiting device 34 may be arranged where the non-slip surface 82 of each second bumper 68, or non-slip surface 66 of the first bumper 60 is malleable and/or elastic. Elastic meaning the material returns to its original length, shape, etc., after being deformed or compressed.

While the present invention is illustrated by description of several embodiments and while the illustrative embodiments are described in detail, it is not the intention of the applicants to restrict or in any way limit the scope of the appended claims to such detail. Additional advantages and modifications within the scope of the appended claims will readily appear to those sufficed in the art. The invention in its broader aspects is therefore not limited to the specific details, representative apparatus and methods, and illustrative examples shown and described. Accordingly, departures may be made from such details without departing from the spirit or scope of applicants' general concept. The invention illustratively disclosed herein suitably may be practiced in the absence of any element which is not specifically disclosed herein.

Claims

1. A range of motion limiting device comprising: a first armature having a first longitudinal end, a second longitudinal end; a first transverse side, a second transverse side;the first longitudinal end of the first armature configured to engage a carriage moving on at least one rail having a first surface and a second surface transversely offset from the first surface of the at least one rail;a first bumper adjacent the first longitudinal end of the first armature, extending transversely from the first transverse side of the first armature;the first bumper having a distal end engaging the first surface of the at least one rail;a second bumper longitudinally offset from the first bumper on the first armature, the second bumper extending transversely from the second transverse side of the first armature;the second bumper having a distal end engaging the second surface of the at least one rail; andthe range of motion limiting device configured a contact force from the carriage rotationally biases the first bumper against the first surface of the at least one rail and the second bumper against the second surface of the at least one rail in a camming action, thus prohibiting further longitudinal movement of the carriage toward the first armature.

2. The range of motion limiting device as recited in claim 1 further comprising a lateral cross member having a first end affixed to the first longitudinal armature and extending laterally therefrom.

3. The range of motion limiting device as recited in claim 2 further comprising a second longitudinal armature affixed to a second end of the lateral cross member, the second longitudinal armature comprising: a second armature having a first longitudinal end, a second longitudinal end; a first transverse side, a second transverse side;the first longitudinal end of the second armature configured to engage the carriage;a first bumper of the second armature adjacent the first longitudinal end of the second armature, extending transversely from the first transverse side of the second armature;the first bumper of the second armature having a distal end with a non-slip surface engaging the first surface of a second rail;a second bumper of the second armature longitudinally offset from the first bumper of the second armature, the second bumper of the second armature extending transversely from the second transverse side of the second armature;the second bumper of the second armature having a distal end with a non-slip surface engaging the second surface of the second rail; andthe range of motion limiting device configured such that force exerted by the carriage is transmitted to the second armature, wherein the force rotationally biases the first bumper against the first surface of the second rail and the second bumper against the second surface of the second rail in a camming action, prohibiting further longitudinal movement of the carriage toward the second armature.

4. The range of motion limiting device as recited in claim 3 wherein the cross member comprises: a first lateral end connected to the first armature;a second lateral end connected to the second armature;a median portion extending between the first lateral end and the second lateral end; andwherein the median portion is transversely offset from the first armature and the second armature.

5. The range of motion limiting device as recited in claim 4 wherein the cross member comprises: a first extension having a first end at the first armature and a second end at the median portion;the first extension at an angle of between 20° and 65° to the median portion;a second extension having a first end at the second armature and a second end at the median portion; andthe second extension at an angle of between 20° and 65° to the median portion.

6. The range of motion limiting device as recited in claim 2 wherein the lateral cross member is configured to directly contact the carriage.

7. The range of motion limiting device as recited in claim 2 wherein the lateral cross member directly contacts the carriage.

8. The range of motion limiting device as recited in claim 2 wherein the lateral cross member is comprised of spring steel.

9. The range of motion limiting device as recited in claim 1 further comprising: a first stiffener affixed to the first armature, the first stiffener configured to reduce longitudinal flexing of the first armature; anda second stiffener affixed to the second armature, the second stiffener configured to reduce longitudinal flexing of the second armature.

10. The range of motion limiting device as recited in claim 1 where a non-slip surface of the second bumper is elastic.

11. The range of motion limiting device as recited in claim 1 wherein a non-slip surface of the first bumper is elastic.

12. The range of motion limiting device as recited in claim 1 further comprising a stiffener affixed to the first armature, the stiffener configured to reduce longitudinal flexing of the first armature.

13. The range of motion limiting device as recited in claim 1 wherein the carriage is a component of a shuttle table.