Patent US3301268A successfully refreshed from Google Patents.
US3301268A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crutches
Assignee: Individual
•
Filing: 1965-05-03
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Granted: 1967-01-31
•
Expires: 1985-05-03
Abstract
No abstract record available.
Inventors
- 👤 Richard R Tryon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:00
CPC Classifications
A; A61; A61H; A61H3/00; A61H3/02; A61H3/0288
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
213 words
A TELESCOPING CRUTCH COMPRISING, IN COMBINATION, AN UPPER PORTION INCLUDING A PAIR OF SPACED PARALLEL SIDE RAILS HAVING THEIR UPPER ENDS CONNECTED BY AN ARM REST, AND A LOWER PORTION WHICH IS SLIDABLY CONNECTED TO THE UPPER PORTION AND WHICH INCLUDES A STAFF, AND A HANDGRIP BY WHICH THE USER HOLDS ON TO THE CRUTCH AND WHICH IS CONNECTED TO SAID LOWER PORTION AND IS LOCATED BETWEEN THE PARALLEL RAILS, AT LEAST A PORTION OF THE HANDGRIP BEING MOUNTED TO PIVOT THROUGH LESS THAN A COMPLETE REVOLUTION, BETWEEN A NORMAL POSITION AND AN ABNORMAL POSITION AND BEING UNSYMMETRICAL WITH RESPECT TO THE AXIS OF PIVOTING TO PERMIT THE USER TO TELL BY HIS SENSE OF TOUCH WHETHER IT IS IN ITS NORMAL OR ITS ABNORMAL POSITION, AND A LATCH MECHANISM POSITIVELY DRIVEN BY THE PIVOTABLE PORTION OF THE HANDGRIP AND ENGAGEABLE WITH AT LEAST ONE RAIL FOR LATCHING THE HANDGRIP IN A PREDETERMINED FIXED POSITION BETWEEN THE PARALLEL RAILS WHEN SUCH PORTION OF THE HANDGRIP IS IN ITS NORMAL POSITION AND THEREBY LOCKING THE UPPER AND LOWER PORTIONS OF THE CRUTCH POSITIVELY IN THEIR EXTENDED POSITIONS, THE UPPER AND LOWER PORTIONS OF THE CRUTCH BEING FREE TO SLIDE RELATIVE TO ONE ANOTHER WHEN SUCH PORTION OF THE HANDGRIP IS IN ITS ABNORMAL POSITION.
Claim 2
Dependent Claim
213 words
A TELESCOPING CRUTCH COMPRISING, IN COMBINATION, AN UPPER PORTION INCLUDING A PAIR OF SPACED PARALLEL SIDE RAILS HAVING THEIR UPPER ENDS CONNECTED BY AN ARM REST, AND A LOWER PORTION WHICH IS SLIDABLY CONNECTED TO THE UPPER PORTION AND WHICH INCLUDES A STAFF, AND A HANDGRIP BY WHICH THE USER HOLDS ON TO THE CRUTCH AND WHICH IS CONNECTED TO SAID LOWER PORTION AND IS LOCATED BETWEEN THE PARALLEL RAILS, AT LEAST A PORTION OF THE HANDGRIP BEING MOUNTED TO PIVOT THROUGH LESS THAN A COMPLETE REVOLUTION, BETWEEN A NORMAL POSITION AND AN ABNORMAL POSITION AND BEING UNSYMMETRICAL WITH RESPECT TO THE AXIS OF PIVOTING TO PERMIT THE USER TO TELL BY HIS SENSE OF TOUCH WHETHER IT IS IN ITS NORMAL OR ITS ABNORMAL POSITION, AND A LATCH MECHANISM POSITIVELY DRIVEN BY THE PIVOTABLE PORTION OF THE HANDGRIP AND ENGAGEABLE WITH AT LEAST ONE RAIL FOR LATCHING THE HANDGRIP IN A PREDETERMINED FIXED POSITION BETWEEN THE PARALLEL RAILS WHEN SUCH PORTION OF THE HANDGRIP IS IN ITS NORMAL POSITION AND THEREBY LOCKING THE UPPER AND LOWER PORTIONS OF THE CRUTCH POSITIVELY IN THEIR EXTENDED POSITIONS, THE UPPER AND LOWER PORTIONS OF THE CRUTCH BEING FREE TO SLIDE RELATIVE TO ONE ANOTHER WHEN SUCH PORTION OF THE HANDGRIP IS IN ITS ABNORMAL POSITION.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-30 | 1970-08-01 | 1971-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-30 | 1974-08-01 | 1975-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-30 | 1978-08-01 | 1979-01-31 | $7700.00 | Window Closed / Lapsed |