US3109676A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic release hook assembly
Assignee: Dunlop Rubber Co Ltd
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Filing: 1962-03-07
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Granted: 1963-11-05
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Expires: 1982-03-07
Abstract
No abstract record available.
Inventors
- 👤 Mercer George Kenneth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 07:47
CPC Classifications
B; B63; B63B; B63B23/00; B63B23/40; B63B23/58; B66; B66C; B66C1/00; B66C1/10; B66C1/22; B66C1/34; B66C1/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
A LOAD CARRYING RELEASE HOOK ASSEMBLY WHICH COMPRISES A SHACKLE RETAINING HOOK MOVABLE TO A POSITION TO ENGAGE AND HOLD A SHACKLE, SPRING MEANS TO SWING SAID HOOK TO A POSITION TO RELEASE SAID SHACKLE, A LOCKING MEANS SPRING PRESSED TO LOCK SAID HOOK IN SHACKLE HOLDING POSITION, AN UNLOCKING MEANS TO MOVE SAID LOCKING MEANS TO RELEASE SAID HOOK, A SPRING BIASING SAID UNLOCKING MEANS TO UNLOCK SAID LOCKING MEANS THEREBY TO RELEASE SAID HOOK, AND MEANS ACTUATED BY THE WEIGHT OF A LOAD SUPPORTED BY SAID HOOK AGAINST THE FORCE OF SAID SPRING TO HOLD SAID UNLOCKING MEANS INOPERATIVE WHEN THE WEIGHT OF SAID LOAD SUPPORTED BY SAID HOOK IS SUFFICIENT TO OVERCOME THE FORCE OF SAID SPRING AND TO RELEASE SAID UNLOCKING MEANS WHEN THE LOAD SUPPORTED BY SAID HOOK IS LESS THAN THE FORCE OF SAID SPRING.
Claim 2
Dependent Claim
141 words
A LOAD CARRYING RELEASE HOOK ASSEMBLY WHICH COMPRISES A SHACKLE RETAINING HOOK MOVABLE TO A POSITION TO ENGAGE AND HOLD A SHACKLE, SPRING MEANS TO SWING SAID HOOK TO A POSITION TO RELEASE SAID SHACKLE, A LOCKING MEANS SPRING PRESSED TO LOCK SAID HOOK IN SHACKLE HOLDING POSITION, AN UNLOCKING MEANS TO MOVE SAID LOCKING MEANS TO RELEASE SAID HOOK, A SPRING BIASING SAID UNLOCKING MEANS TO UNLOCK SAID LOCKING MEANS THEREBY TO RELEASE SAID HOOK, AND MEANS ACTUATED BY THE WEIGHT OF A LOAD SUPPORTED BY SAID HOOK AGAINST THE FORCE OF SAID SPRING TO HOLD SAID UNLOCKING MEANS INOPERATIVE WHEN THE WEIGHT OF SAID LOAD SUPPORTED BY SAID HOOK IS SUFFICIENT TO OVERCOME THE FORCE OF SAID SPRING AND TO RELEASE SAID UNLOCKING MEANS WHEN THE LOAD SUPPORTED BY SAID HOOK IS LESS THAN THE FORCE OF SAID SPRING.
References Cited (Backward Citations)
GB158304A
Cited
US2858161A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-11-04 | 1967-05-06 | 1967-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-11-04 | 1971-05-06 | 1971-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-11-04 | 1975-05-06 | 1975-11-05 | $7700.00 | Window Closed / Lapsed |