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US3351955A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Artificial leg having a knee joint construction which selectively permits either manual or automatic rotation between the stump unit and lower leg unit
Assignee: Individual
•
Filing: 1964-12-30
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Granted: 1967-11-14
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Expires: 1984-12-30
Abstract
No abstract record available.
Inventors
- 👤 Middleton Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:27
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/50; A61F2/60; A61F2/64
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
AN ARTIFICIAL LEG COMPRISING A STUMP UNIT AND A LOWER LEG ASSEMBLY CONNECTED THROUGH A SWINGABLE KNEE JOINT, SAID KNEE JOINT COMPRISING A FIRST MEMBER SECURED TO SAID STUMP OF SAID ARTIFICAL LEG, A SECOND MEMBER ROTATABLY MOUNTED ON SAID FIRST MEMBER AND SECURED TO SAID LEG ASSEMBLY, LOCK MEANS OPERABLE BETWEEN SAID MEMBERS TO HOLD THEM AGAINST ROTATION, AND RELEASE MEANS OPERABLE AFTER A PRESELECTED REARWARD SWINGING MOVEMENT OF SAID LEG ASSEMBLY RELATIVE TO SAID STUMP WHEREBY SAID LOCK MEANS HOLDING SAID FIRST AND SECOND MEMBERS AGAINST ROTATION IS RELEASED ALLOWING SAID LEG ASSEMBLY TO ROTATE RELATIVE TO SAID STUM UNIT.
Claim 2
Dependent Claim
102 words
AN ARTIFICIAL LEG COMPRISING A STUMP UNIT AND A LOWER LEG ASSEMBLY CONNECTED THROUGH A SWINGABLE KNEE JOINT, SAID KNEE JOINT COMPRISING A FIRST MEMBER SECURED TO SAID STUMP OF SAID ARTIFICAL LEG, A SECOND MEMBER ROTATABLY MOUNTED ON SAID FIRST MEMBER AND SECURED TO SAID LEG ASSEMBLY, LOCK MEANS OPERABLE BETWEEN SAID MEMBERS TO HOLD THEM AGAINST ROTATION, AND RELEASE MEANS OPERABLE AFTER A PRESELECTED REARWARD SWINGING MOVEMENT OF SAID LEG ASSEMBLY RELATIVE TO SAID STUMP WHEREBY SAID LOCK MEANS HOLDING SAID FIRST AND SECOND MEMBERS AGAINST ROTATION IS RELEASED ALLOWING SAID LEG ASSEMBLY TO ROTATE RELATIVE TO SAID STUM UNIT.
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) | 1970-11-13 | 1971-05-15 | 1971-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-13 | 1975-05-15 | 1975-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-13 | 1979-05-15 | 1979-11-14 | $7700.00 | Window Closed / Lapsed |