US3301533A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control means for lowering device cables
Assignee: Cooper Industries LLC
•
Filing: 1965-08-27
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Granted: 1967-01-31
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Expires: 1985-08-27
Abstract
No abstract record available.
Inventors
- 👤 Jr Henry C Pfaff
- 👤 Francis G Schlosser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:22
CPC Classifications
B; B66; B66D; B66D3/00; B66D3/18; B66D3/24; Y; Y10; Y10T; Y10T24/00; Y10T24/39
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A HOISTING DEVICE COMPRISING A DRUM, A CABLE HAVING A FREE END FOR SUPPORTING A LOAD WOUND ON THE DRUM, AN ELECTRIC MOTOR CONNECTED TO THE DRUM FOR ROTATING THE DRUM, TO WIND AND UNWIND THE CABLE TO THEREBY RAISE AND LOWER THE LOAD, AND MEANS FOR CONTROLLING THE MOTOR COMPRISING A PAIR OF SWITCHES, MEANS FOR LATCHING THE CABLE IN A PRESELECTED POSITION AND OPENING ONE OF THE SWITCHES, MEANS FOR SEQUENTIALLY CLOSING SAID ONE OF THE SWITCHES AND UNLATCHING THE CABLE, AND MEANS FOR CLOSING THE SECOND SWITCH ONLY AFTER CLOSING SAID ONE SWITCH TO ENERGIZE MOTOR.
Claim 2
Dependent Claim
99 words
A HOISTING DEVICE COMPRISING A DRUM, A CABLE HAVING A FREE END FOR SUPPORTING A LOAD WOUND ON THE DRUM, AN ELECTRIC MOTOR CONNECTED TO THE DRUM FOR ROTATING THE DRUM, TO WIND AND UNWIND THE CABLE TO THEREBY RAISE AND LOWER THE LOAD, AND MEANS FOR CONTROLLING THE MOTOR COMPRISING A PAIR OF SWITCHES, MEANS FOR LATCHING THE CABLE IN A PRESELECTED POSITION AND OPENING ONE OF THE SWITCHES, MEANS FOR SEQUENTIALLY CLOSING SAID ONE OF THE SWITCHES AND UNLATCHING THE CABLE, AND MEANS FOR CLOSING THE SECOND SWITCH ONLY AFTER CLOSING SAID ONE SWITCH TO ENERGIZE MOTOR.
References Cited (Backward Citations)
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Cited
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US2006476A
Cited
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Cited
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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 |