# US 2008/0188356 A1 · Knee orthosis

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- Number: US 2008/0188356 A1
- Document ID: US20080188356A1
- Status: Published application
- Kind: A1
- Application number: 12/026,112
- Filed: 2008-02-05
- Published: 2008-08-07
- Earliest claimed: 2007-02-05
- Assignees: Bonutti Research, Inc.
- Inventors: Boris P. Bonutti; Peter M. Bonutti; Glen A. Phillips
- Web page: https://patentgrep.com/patent/US20080188356A1

## CPC

- A61H 1/024: {Knee (A61H1/0255 takes precedence)}
- A61F 5/0125: {the device articulating around a single pivot-point}
- A61H 1/00: Apparatus for passive exercising (A61H5/00 takes precedence); Vibrating apparatus; Chiropractic devices, e.g. body impacting devices, external devices for briefly extending or aligning unbroken bones
- A61H 1/02: Stretching or bending {or torsioning} apparatus for exercising
- A61H 1/0237: {for the lower limbs}
- A61F 2005/0139: {geared}
- A61F 2005/0153: {combining rotational and stretching movements}
- A61H 1/0244: {Hip (A61H1/0255 takes precedence)}
- A61H 1/0266: {Foot}
- A61H 1/0274: {for the upper limbs}
- A61H 1/0277: {Elbow}
- A61H 1/0281: {Shoulder}
- A61H 1/0285: {Hand}
- A61H 1/0288: {Fingers}
- A61H: PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY (electrotherapy, magnetotherapy, radiation therapy or ultrasound therapy A61N)
- A61F: FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS (dental prosthetics A61C)

## Abstract

An orthosis for stretching tissue around a joint of a patient between first and second relatively pivotable body portions. The orthosis includes a first arm member affixable to the first body portion and including a first extension member extending therefrom. A second arm member affixable to the second body portion is also included and has a second extension member having an arcuate shape extending therefrom. A third arm member including a third extension member having an arcuate shape extending therefrom is interposed between the first and second arm members. The third extension member is slidably connected to the first arm member and the second extension member is operatively connected to the third arm members, such that the second arm members travel along an arcuate path defined by the second extension member when the second arm member is moved from a first position to a second position relative to the first and third arm members. Furthermore, the position of the third arm member can be securedly adjusted relative the first arm member.

## Claims

### Claim 1

An orthosis for stretching tissue around a joint of a patient between first and second relatively pivotable body portions, comprising:
a first arm member affixable to the first body portion and including a first extension member extending therefrom;
a second arm member affixable to the second body portion and including a second extension member having an arcuate shape extending therefrom; and
a third arm member interposed between the first and second arm members and including a third extension member having an arcuate shape extending therefrom,
wherein the third arm member is slidingly connected to the first extension member and the second extension member is operatively connected to the third arm member and travels along an arcuate path defined by the second extension member when the second arm member is moved from a first position to a second position relative to the first and third arm members.

### Claim 2 (depends on 1)

The orthosis of claim 1, further comprising a first cuff attached to the first arm member.

### Claim 3 (depends on 2)

The orthosis of claim 2, wherein the first cuff is fastenable about the first body portion tightly enough such that the first arm member may apply a force to the first body portion without having the first cuff slide along the first body portion.

### Claim 4 (depends on 1)

The orthosis of claim 1, further comprising a second cuff attached to the second arm member.

### Claim 5 (depends on 4)

The orthosis of claim 4, wherein the second cuff is fastenable about the second body portion tightly enough such that the second arm member may apply a force to the second body portion without having the second cuff slide along the second body portion.

### Claim 6 (depends on 4)

The orthosis of claim 4, wherein the second cuff is slidably mounted to the second arm member.

### Claim 7 (depends on 1)

The orthosis of claim 1, further comprising a drive assembly on the third arm member, the drive assembly engaging the second extension member for selectively moving the second arm member with respect to the third arm member.

### Claim 8 (depends on 7)

The orthosis of claim 7, wherein the drive assembly includes an anti-rotation mechanism.

### Claim 9 (depends on 8)

The orthosis of claim 8, wherein the drive assembly includes a gear rotatably mounted in the third arm member.

### Claim 10 (depends on 9)

The orthosis of claim 9, wherein the second extension member includes a plurality of teeth for engaging the gear.

### Claim 11 (depends on 10)

The orthosis of claim 10, wherein the gear is manually rotatable for selectively moving the second arm member with respect to the third arm member.

### Claim 12 (depends on 9)

The orthosis of claim 9, further comprising a motor operatively connected to the gear for selectively moving the second arm member with respect to the third arm member.

### Claim 13 (depends on 1)

The orthosis of claim 1, wherein the third arm member slides along an arcuate path with respect to the first member, defined by the third extension member as the third arm member is moved from the first position to the second position relative to the first arm member.

### Claim 14 (depends on 13)

The orthosis of claim 13, further comprising a locking pin removable positionable through the first and third arm members, wherein the locking pin locks the position of the third arm member with respect to the first arm member.

### Claim 15 (depends on 1)

The orthosis of claim 1, wherein the joint defines a first plane substantially orthogonal to a longitudinal axis of the second arm member and a second plane substantially parallel to the longitudinal axis of the second arm member.

### Claim 16 (depends on 15)

The orthosis of claim 15, wherein the second extension member extends from the second arm member, such that the operative connections of the first, second, and third arm members lie in the first plane.

### Claim 17 (depends on 1)

The orthosis of claim 1, wherein the joint and the first and second body portions define on one side of the joint an inner sector which decreases in angle as the joint is flexed and define on the opposite side of the joint an outer sector which decreases in angle as the joint is extended, such that the operative connections of the first, second, and third arm members are located in the inner sector.

### Claim 18

An orthosis for stretching tissue around a knee joint of a patient between upper and lower leg portions, the knee joint and the upper and lower leg portions defining on one side of the knee joint an inner sector which decreases in angle as the knee joint is flexed and defining on the opposite side of the knee joint an outer sector which decreases in angle as the knee joint is extended, comprising:
a first arm member affixable to the upper leg portion and including a first extension member extending therefrom;
a second arm member affixable to the lower leg portion and including a second extension member having an arcuate shape extending therefrom;
a third arm member interposed between the first and second arm members and including a third extension member having an arcuate shape extending therefrom,
wherein the third arm member is slidingly connected to the first extension member and the second extension member is operatively connected to the third member and travels along an arcuate path defined by the second extension member when the second arm member is moved from a first position to a second position relative to the third arm member; and
a drive assembly on the third arm member, the drive assembly engaging the second extension member for selectively moving the second arm member with respect to the first and third arm members.

### Claim 19 (depends on 18)

The orthosis of claim 18, wherein the drive assembly includes an anti-rotation mechanism.