US4387709A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Knee brace
Assignee: Individual
•
Filing: 1981-07-13
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Granted: 1983-06-14
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Expires: 2001-07-13
Abstract
Abstract A device for immobilizing the knee of an individual is an open-ended, tubular shell formed of an integral piece of semi-rigid material having portions shaped to receive the lower thigh, knee, and upper calf of the individual. The device is easily slipped on and off by means of expansion of a longitudinal opening which bifurcates one side of the device. After the device is placed around the individual's leg, the opening can be closed to tighten the shell around the leg forming the shell into an essentially closed open-ended tube which has substantial structural strength to provide secure immobilization. The thigh and calf portions of the device have flat areas to prevent rotation of the individual's leg within the device. The thigh portion extends at an angle from the calf portion sufficient to immobilize the individual's knee in a flexed position in which the ligaments are relaxed.
Inventors
- 👤 C. Anthony Shen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:49
CPC Classifications
A; A61; A61F; A61F5/00; A61F5/01; A61F5/0102; A61F5/0104; A61F5/0106; A61F5/04; A61F5/05; A61F5/058; A61F5/05841; A61F5/0585
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
125 words
A device for immobilizing an individual's knee comprising: an open-ended integral body formed into a substantially cylindrical tubular shell of semi-rigid material to provide substantial structural strength and secure immobilization, said shell having thigh, knee, and calf portions shaped to cover an individual's lower thigh, knee, and upper calf, respectively; said body having a narrow longitudinal opening extending the length of said shell for permitting said shell to be slipped on and off the individual; said tubular shell, at said thigh and calf portions including indentations which provide flat areas to prevent rotation of an individual's leg within the device; and said thigh portion extending at a sufficient angle from the calf portion to produce ligament relaxation of the individual's knee in a flexed position.
Claim 2
Independent Claim
125 words
A device for immobilizing an individual's knee comprising: an open-ended integral body formed into a substantially cylindrical tubular shell of semi-rigid material to provide substantial structural strength and secure immobilization, said shell having thigh, knee, and calf portions shaped to cover an individual's lower thigh, knee, and upper calf, respectively; said body having a narrow longitudinal opening extending the length of said shell for permitting said shell to be slipped on and off the individual; said tubular shell, at said thigh and calf portions including indentations which provide flat areas to prevent rotation of an individual's leg within the device; and said thigh portion extending at a sufficient angle from the calf portion to produce ligament relaxation of the individual's knee in a flexed position.
Claim 3
Independent Claim
109 words
A device for immobilizing an individual's knee comprising: an open-ended integral body formed into a substantially cylindrical shell of semi-rigid material, said body having thigh, knee, and calf portions sized to cover an individual's lower thigh, knee and upper calf, respectively; means for reducing the circumference of said portions to tighten said shell of semi-rigid material contiguously around the individual's lower thigh, knee, and upper calf and effect immobilization; and said cylindrical shell, at said thigh and calf portions including indentations which provide flat areas which seat flush against the individual's leg above and below the knee to prevent any rotation of the leg when the shell is tightened.
Claim 4
Independent Claim
109 words
A device for immobilizing an individual's knee comprising: an open-ended integral body formed into a substantially cylindrical shell of semi-rigid material, said body having thigh, knee, and calf portions sized to cover an individual's lower thigh, knee and upper calf, respectively; means for reducing the circumference of said portions to tighten said shell of semi-rigid material contiguously around the individual's lower thigh, knee, and upper calf and effect immobilization; and said cylindrical shell, at said thigh and calf portions including indentations which provide flat areas which seat flush against the individual's leg above and below the knee to prevent any rotation of the leg when the shell is tightened.
Claim 5
Dependent Claim
14 words
The device of claim 1 wherein said angle is about 145° to about 165°.
Claim 6
Dependent Claim
14 words
The device of claim 3 wherein said angle is about 150° to about 160°.
Claim 7
Independent Claim
65 words
A device for immobilizing an individual's knee comprising: an open-ended integral body formed into a substantially cylindrical tubular shell of semi-rigid material, said shell having a knee portion which essentially surrounds the patient's knee to effect secure immobilization, said shell having indentations, located above and below said knee portion, for compressing the individual's leg and thereby preventing rotation of the individual's leg within the device.
Claim 8
Independent Claim
65 words
A device for immobilizing an individual's knee comprising: an open-ended integral body formed into a substantially cylindrical tubular shell of semi-rigid material, said shell having a knee portion which essentially surrounds the patient's knee to effect secure immobilization, said shell having indentations, located above and below said knee portion, for compressing the individual's leg and thereby preventing rotation of the individual's leg within the device.
Claim 9
Independent Claim
78 words
A device for immobilizing an individual's knee comprising: an open-ended integral body formed into a substantially cylindrical shell of semi-rigid material, said body having thigh, knee, and calf portions sized to cover an individual's lower thigh, knee, and upper calf, respectively; and said calf portion including indentations which provide flat areas located on the back and sides of said body to apply pressure to said individual's calf and thereby prevent rotation of an individual's leg within said body.
Claim 10
Independent Claim
78 words
A device for immobilizing an individual's knee comprising: an open-ended integral body formed into a substantially cylindrical shell of semi-rigid material, said body having thigh, knee, and calf portions sized to cover an individual's lower thigh, knee, and upper calf, respectively; and said calf portion including indentations which provide flat areas located on the back and sides of said body to apply pressure to said individual's calf and thereby prevent rotation of an individual's leg within said body.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-06-13 | 1986-12-13 | 1987-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-13 | 1990-12-13 | 1991-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-13 | 1994-12-13 | 1995-06-14 | $7700.00 | Window Closed / Lapsed |