Patent US3188052A successfully refreshed from Google Patents.
US3188052A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lowering apparatus
Assignee: Safety Automatic Fire Escapes Ltd
•
Filing: 1963-01-07
•
Granted: 1965-06-08
•
Expires: 1983-01-07
Abstract
No abstract record available.
Inventors
- 👤 Longworth Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:59
CPC Classifications
B; B66; B66D; B66D5/00; B66D5/02; B66D5/04; A; A62; A62B; A62B1/00; A62B1/06; A62B1/08; A62B1/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
IN A FITTING AND LOWERING APPARATUS, A ROTATABLY MOUNTED DRUM, A ROPE HAVING ONE END ATTACHED TO THE DRUM AND ANOTHER END FREE OF THE DRUM AND BEING WOUND AT LEAST PARTIALLY ON SAID DRUM, SPRING MEANS FOR URGING THE DRUM TO ROTATE IN THE DIRECTION CAUSING WINDING OF THE ROPE THEREON, LOAD SUPPORTING MEANS AT THE FREE END OF THE ROPE, A PULLEY ENGAGED BY THE ROPE BETWEEN ITS FREE END AND THE DRUM, A CENTRIFUGAL BRAKE, AND A FREE WHEEL CLUTCH MOUNTED ON SAID BRAKE AND SAID CLUTCH INCLUDING SPRINGLOADED BALLS FOR INTERCONNECTING SAID PULLEY AND SAID BRAKE WHEREBY THE ROPE IS SUBJECTED TO BRAKE ACTION ON UNWINDING FROM THE DRUM TO EFFECT CONTROLLED LOWERING OF A LOAD CARRIED BY SAID LOAD SUPPORTING MEANS AND IS ADAPTED TO RETURN FREELY FOR REWINDING ON THE DRUM BY SAID SPRING MEANS ON REMOVAL OF SAID LOAD.
Claim 2
Dependent Claim
146 words
IN A FITTING AND LOWERING APPARATUS, A ROTATABLY MOUNTED DRUM, A ROPE HAVING ONE END ATTACHED TO THE DRUM AND ANOTHER END FREE OF THE DRUM AND BEING WOUND AT LEAST PARTIALLY ON SAID DRUM, SPRING MEANS FOR URGING THE DRUM TO ROTATE IN THE DIRECTION CAUSING WINDING OF THE ROPE THEREON, LOAD SUPPORTING MEANS AT THE FREE END OF THE ROPE, A PULLEY ENGAGED BY THE ROPE BETWEEN ITS FREE END AND THE DRUM, A CENTRIFUGAL BRAKE, AND A FREE WHEEL CLUTCH MOUNTED ON SAID BRAKE AND SAID CLUTCH INCLUDING SPRINGLOADED BALLS FOR INTERCONNECTING SAID PULLEY AND SAID BRAKE WHEREBY THE ROPE IS SUBJECTED TO BRAKE ACTION ON UNWINDING FROM THE DRUM TO EFFECT CONTROLLED LOWERING OF A LOAD CARRIED BY SAID LOAD SUPPORTING MEANS AND IS ADAPTED TO RETURN FREELY FOR REWINDING ON THE DRUM BY SAID SPRING MEANS ON REMOVAL OF SAID LOAD.
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) | 1968-06-07 | 1968-12-07 | 1969-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-07 | 1972-12-07 | 1973-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-07 | 1976-12-07 | 1977-06-08 | $7700.00 | Window Closed / Lapsed |