Patent US3310291A successfully refreshed from Google Patents.
US3310291A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tension responsive power driven winch
Assignee: Individual
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Filing: 1965-12-20
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Granted: 1967-03-21
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Expires: 1985-12-20
Abstract
No abstract record available.
Inventors
- 👤 John H Wiggins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:32
CPC Classifications
B; B66; B66D; B66D3/00; B66D2700/00; B66D2700/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
A POWER DRIVEN WINCH AND CABLE AND COUNTERWEIGHT SYSTEM WHEREBY A CONTINUOUS LIFTING CABLE TENSION IS APPLIED AT A BODY, SAID SYSTEM INCLUDING A SUPPORT AND A LEVER PIVOTED THEREON, A WINCH MOUNTED ON SAID LEVER AT A SPACED LOCATION FROM THE PIVOTAL AXIS THEREOF, SAID LEVER AND SAID WINCH COMPRISING A PART OF THE COUNTERWEIGHT OF SAID SYSTEM, OPERATION OF SAID WINCH IN RESPONSE TO AN INCREASE IN LOAD SERVING TO MOVE SAID COUNTERWEIGHT UPWARDLY AND RAISE SAID BODY, A SWITCH POSITIONED TO BE OPERATED BY SAID COUNTERWEIGHT AND TO CUT OFF SAID POWER AT A PREDETERMINED CABLE TENSION, AND WHEREBY SUBSEQUENTLY SAID COUNTERWEIGHT MOVES DOWNWARDLY ACTUATED BY ITS OWN EFFECTIVE WEIGHT UPON REMOVAL OF SAID INCREASED TENSION, AND OPERATES TO RAISE SAID BODY A PREDETERMINED DISTANCE AND TURN ON SAID POWER BY OPERATING SAID SWITCH.
Claim 2
Dependent Claim
137 words
A POWER DRIVEN WINCH AND CABLE AND COUNTERWEIGHT SYSTEM WHEREBY A CONTINUOUS LIFTING CABLE TENSION IS APPLIED AT A BODY, SAID SYSTEM INCLUDING A SUPPORT AND A LEVER PIVOTED THEREON, A WINCH MOUNTED ON SAID LEVER AT A SPACED LOCATION FROM THE PIVOTAL AXIS THEREOF, SAID LEVER AND SAID WINCH COMPRISING A PART OF THE COUNTERWEIGHT OF SAID SYSTEM, OPERATION OF SAID WINCH IN RESPONSE TO AN INCREASE IN LOAD SERVING TO MOVE SAID COUNTERWEIGHT UPWARDLY AND RAISE SAID BODY, A SWITCH POSITIONED TO BE OPERATED BY SAID COUNTERWEIGHT AND TO CUT OFF SAID POWER AT A PREDETERMINED CABLE TENSION, AND WHEREBY SUBSEQUENTLY SAID COUNTERWEIGHT MOVES DOWNWARDLY ACTUATED BY ITS OWN EFFECTIVE WEIGHT UPON REMOVAL OF SAID INCREASED TENSION, AND OPERATES TO RAISE SAID BODY A PREDETERMINED DISTANCE AND TURN ON SAID POWER BY OPERATING SAID SWITCH.
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) | 1970-03-20 | 1970-09-19 | 1971-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-20 | 1974-09-19 | 1975-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-20 | 1978-09-19 | 1979-03-21 | $7700.00 | Window Closed / Lapsed |