US3694823A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Knee joints for artificial legs
Assignee: JE Hanger and Co Ltd
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Filing: 1970-06-25
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Granted: 1972-10-03
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Expires: 1990-06-25
Abstract
Abstract The invention provides a prosthetic knee joint of the kind applying a lock against flexure when it is bearing a patient''s weight, in which a brake band is applied to a drum on the knee joint spindle by an accurately adjustable lever carried by the thigh portion of the joint.
Inventors
- 👤 Denis Ronald William May
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:35
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/50; A61F2/60; A61F2/64; A61F2/68; A61F2002/6845
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
175 words
An artificial knee joint between thigh and shin portions of a limb including mechanism for tightening a hoop clamp about a drum carried for rotation in one direction only by a pivot pin locked to the shin portion of the joint, said mechanism comprising a two-part tension member consisting of a housing pivoted to a bracket fixed to the thigh portion of the joint and to one end of the hoop clamp, and a lever pivoted to the said one end of the clamp and connected to the other end of the clamp, the said lever being angularly adjustable relative to the housing so as to preset the location of the two ends of the clamp relative to the thigh portion, whereby actuation of the clamp on application of a patient''s weight causing relative movement between thigh and shin portions may be adjusted to suit an individual patient, a pivot pin Connecting said two part tension member to said bracket, said pin being eccentric and moveable between positions rendering said tension member effective and ineffective.
Claim 2
Dependent Claim
175 words
An artificial knee joint between thigh and shin portions of a limb including mechanism for tightening a hoop clamp about a drum carried for rotation in one direction only by a pivot pin locked to the shin portion of the joint, said mechanism comprising a two-part tension member consisting of a housing pivoted to a bracket fixed to the thigh portion of the joint and to one end of the hoop clamp, and a lever pivoted to the said one end of the clamp and connected to the other end of the clamp, the said lever being angularly adjustable relative to the housing so as to preset the location of the two ends of the clamp relative to the thigh portion, whereby actuation of the clamp on application of a patient''s weight causing relative movement between thigh and shin portions may be adjusted to suit an individual patient, a pivot pin Connecting said two part tension member to said bracket, said pin being eccentric and moveable between positions rendering said tension member effective and ineffective.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-03 | 1976-04-03 | 1976-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-03 | 1980-04-03 | 1980-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-03 | 1984-04-03 | 1984-10-03 | $7700.00 | Window Closed / Lapsed |