US4388920A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable position knee immobilizer
Assignee: Kirschner Medical Corp
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Filing: 1981-10-26
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Granted: 1983-06-21
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Expires: 2001-10-26
Abstract
Abstract A wraparound immobilizer including a stiffener support which is rotatable and lockable to accommodate the varying positions of a patient's knee.
Inventors
- 👤 Mark J. Hajost
- 👤 Robert L. Crevling
- 👤 Fred B. Powell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:40
CPC Classifications
A; A61; A61F; A61F5/00; A61F5/01; A61F5/0102; A61F5/0123; A61F5/0125
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
190 words
A variable position knee immobilizer comprising: a flexible cover having upper and lower sections each in planar orientation having upper and lower edges and opposite side edges and adapted to be wrapped about and surround the thigh and calf portions of a patient's leg; securing means connected to said upper and lower sections of said cover for fastening the cover around the patient's leg above and below the knee; and stiffener support means comprising upper and lower elongate, interconnected generally flat plates operatively connected to corresponding upper and lower sections of the cover generally centrally of their side edges and extending from adjacent the top edge to the bottom edge of each section to be located along the back of the leg generally parallel to the length of the leg with adjacent ends of the plates being positioned directly behind the knee, and means pivotally interconnecting the adjacent ends of the plates for rotatably positioning the plates and the upper and lower sections of the cover, said pivotal interconnecting means including means for locking the plates at varying positions of the patient's knee to immobilize the leg in such positions.
Claim 2
Dependent Claim
190 words
A variable position knee immobilizer comprising: a flexible cover having upper and lower sections each in planar orientation having upper and lower edges and opposite side edges and adapted to be wrapped about and surround the thigh and calf portions of a patient's leg; securing means connected to said upper and lower sections of said cover for fastening the cover around the patient's leg above and below the knee; and stiffener support means comprising upper and lower elongate, interconnected generally flat plates operatively connected to corresponding upper and lower sections of the cover generally centrally of their side edges and extending from adjacent the top edge to the bottom edge of each section to be located along the back of the leg generally parallel to the length of the leg with adjacent ends of the plates being positioned directly behind the knee, and means pivotally interconnecting the adjacent ends of the plates for rotatably positioning the plates and the upper and lower sections of the cover, said pivotal interconnecting means including means for locking the plates at varying positions of the patient's knee to immobilize the leg in such positions.
Claim 3
Dependent Claim
86 words
The knee immobilizer of claim 1 wherein said pivotal interconnecting means comprise spaced disk portions on the adjacent ends of each plate extending perpendicular to the plane of the plate, the disk portions on one of said plates engaging corresponding disk portions on the other of said plates, and said locking means including pivot pin means connecting disk portions of one plate to respective disk portions of the other plate and being adjustable to grippingly secure the same together and prevent relative movement of the plates.
Claim 4
Dependent Claim
39 words
The knee immobilizer of claim 2 wherein said locking means further includes serrations on opposed contiguous surfaces of said disk portions for frictional engagement to secure said plates against relative movement upon gripping engagement by said pivot pin means.
Claim 5
Dependent Claim
62 words
The knee immobilizer of claim 3 wherein said pivot pin means includes a pair of bolts extending through openings in respective engaged disk portions of the plates and engaging spacer means extending between the spaced disk portions of the plates, said bolts being individually adjustable to grip said disk portions and thereby maintain said plates in fixed position relative to each other.
Claim 6
Dependent Claim
32 words
The knee immobilizer of claim 1 wherein said upper and lower plates and disk portions thereof are of substantially identical construction to facilitate their manufacture and interchangeable use in the knee immobilizer.
References Cited (Backward Citations)
US2545843A
Cited
US4013070A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-06-20 | 1986-12-20 | 1987-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-20 | 1990-12-20 | 1991-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-20 | 1994-12-20 | 1995-06-21 | $7700.00 | Window Closed / Lapsed |