Shoulder ROM orthosis
First Claim
1. A device for stretching tissue of a joint in a body of a patient, said device comprising:
- a force application assembly comprising;
a first hinge includinga first hinge portion affixable to a first portion of the patient'"'"'s body on a first side of the joint;
a second hinge portion pivotally connected to said first hinge portion, affixable to a second portion of the patient'"'"'s body on a second side of the joint; and
a spool;
a second hinge connected to said first hinge, operative to increase an angle of the first hinge thereby changing an angle of the joint to stretch tissue of the joint, when an angle of the second hinge is increased;
a first pulley;
a second pulley formed between said first hinge and said second hinge;
a resilient cable operatively engaged with said spool, said first pulley, and said second pulley, wherein said spool is configured to apply a tension to said cable whereby tension on said cable applies a force to said first and second hinges in a direction of increasing an angle of said first and second hinges;
wherein when said free end of said cable is affixed relative to said second pulley, said resilience of said cable is operative to impart a continuous force to said first and second hinges in a direction of increasing an angle of said first and second hinges; and
a drive assembly coupled to the force application assembly, said drive assembly configured to move the second body portion with respect to the first body portion, wherein said drive assembly is further configured to maintain said spool in a position of applying tension to said cable;
wherein said drive assembly further comprises;
a first circular raceway;
at least one rotatable element;
a second raceway disposed in concentrically rotating conformity with said first circular raceway, having at least one curved surface operative to support said rotatable element between said first and second raceways, whereby when said first circular raceway is rotated in a first direction, said curved surface urges said rotatable element to a position in binding conformity between said first and second raceways, preventing rotation of said first raceway with respect to said second raceway; and
a plurality of pins configured to prevent said rotatable element from moving to said position in binding conformity when said second raceway is rotated.
1 Assignment
0 Petitions
Accused Products
Abstract
Therapeutic abduction of the shoulder joint is achieved using a hinged device, the hinge activated by a cable passed between pulleys to increase mechanical advantage. The cable is wound on a spool mounted on a ratcheting mechanism, whereby tension is maintained as the spool is wound via a knob or computer controlled motor. A rotation control device enables rotation of the spool by a user, but prevents rotation due to a load. Mating shackles pivot in connection with the hinge, and are activated by the cable to increase the angle of the hinge. The hinge is connected to the body, one portion affixed relative to the body, the other affixed relative to the upper arm. As the hinge angle is expanded, the shoulder joint is abducted, stretching the tissue of the joint. If resilient, the cable imparts a dynamic tensioning force to the shoulder joint. Medial or lateral rotation is accomplished by a second device disposed at the elbow, wherein the pivot point of internal/external rotation is along the axis of the upper arm.
295 Citations
14 Claims
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1. A device for stretching tissue of a joint in a body of a patient, said device comprising:
a force application assembly comprising; a first hinge including a first hinge portion affixable to a first portion of the patient'"'"'s body on a first side of the joint; a second hinge portion pivotally connected to said first hinge portion, affixable to a second portion of the patient'"'"'s body on a second side of the joint; and a spool; a second hinge connected to said first hinge, operative to increase an angle of the first hinge thereby changing an angle of the joint to stretch tissue of the joint, when an angle of the second hinge is increased; a first pulley; a second pulley formed between said first hinge and said second hinge; a resilient cable operatively engaged with said spool, said first pulley, and said second pulley, wherein said spool is configured to apply a tension to said cable whereby tension on said cable applies a force to said first and second hinges in a direction of increasing an angle of said first and second hinges; wherein when said free end of said cable is affixed relative to said second pulley, said resilience of said cable is operative to impart a continuous force to said first and second hinges in a direction of increasing an angle of said first and second hinges; and a drive assembly coupled to the force application assembly, said drive assembly configured to move the second body portion with respect to the first body portion, wherein said drive assembly is further configured to maintain said spool in a position of applying tension to said cable;
wherein said drive assembly further comprises;a first circular raceway; at least one rotatable element; a second raceway disposed in concentrically rotating conformity with said first circular raceway, having at least one curved surface operative to support said rotatable element between said first and second raceways, whereby when said first circular raceway is rotated in a first direction, said curved surface urges said rotatable element to a position in binding conformity between said first and second raceways, preventing rotation of said first raceway with respect to said second raceway; and a plurality of pins configured to prevent said rotatable element from moving to said position in binding conformity when said second raceway is rotated. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A device for stretching tissue of a joint in a body of a patient, comprising:
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a first hinge including a first hinge portion affixable to a first portion of the patient'"'"'s body on a first side of the joint; and a second hinge portion pivotally connected to said first hinge portion, affixable to a second portion of the patient'"'"'s body on a second side of the joint; a spool associated with said first hinge portion; a first pulley associated with said second hinge portion; a cable extending between said spool and said first pulley; a drive shaft configured to apply a rotational force to said first pulley whereby a tension is applied to said cable and said first hinge portion is urged to move relative to said second hinge portion; a drive assembly configured to limit a rotation of said first pulley, said drive assembly including a first circular raceway; at least one rotatable element; and a second raceway disposed in concentrically rotating conformity with said first circular raceway, having at least one curved surface operative to support said rotatable element between said first and second raceways, whereby when said first circular raceway is rotated in a first direction, said curved surface urges said rotatable element to a position in binding conformity between said first and second raceways, preventing rotation of said first raceway with respect to said second raceway; and a plurality of pins configured to prevent said rotatable element from moving to said position in binding conformity when said second raceway is rotated. - View Dependent Claims (9, 10, 11, 12)
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13. A device for stretching tissue of a joint in a body of a patient, comprising:
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a first hinge including a first hinge portion affixable to a first portion of the patient'"'"'s body on a first side of the joint; and a second hinge portion pivotally connected to said first hinge portion, affixable to a second portion of the patient'"'"'s body on a second side of the joint; a second hinge connected between said first and second hinge portions; a cable extending between one of said first and second hinge portions and said second hinge; a spool, connected to said cable, operative to apply a tension to said cable to increase an angle of said second hinge, thereby increasing an angle of said first hinge to cause stretching of joint tissue; a drive assembly configured to limit a rotation of said spool, including a first circular raceway connected to said spool; at least one rotatable element; and a second raceway disposed in concentrically rotating conformity with said first circular raceway, having at least one curved surface operative to support said rotatable element between said first and second raceways, whereby when said first circular raceway is rotated in a first direction, said curved surface urges said rotatable element to a position in binding conformity between said first and second raceways, preventing rotation of said first raceway with respect to said second raceway; and a plurality of pins configured to prevent said rotatable element from moving to said position in binding conformity when said second raceway is rotated. - View Dependent Claims (14)
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Specification