Patent US2515073A successfully refreshed from Google Patents.
Patent US3219154A successfully refreshed from Google Patents.
US3219154A
Expired / Lapsed
US
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Overload protection device for hoists with an axial load brake
Assignee: Yale and Towne Inc
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Filing: 1962-08-27
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Granted: 1965-11-23
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Expires: 1982-08-27
Abstract
No abstract record available.
Inventors
- 👤 Robert K A Schenck
- 👤 Scheel Hans Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:05
CPC Classifications
B; B66; B66D; B66D5/00; B66D5/02; B66D5/12; B66D2700/00; B66D2700/07
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
IN A HOIST OF THE CLASS DESCRIBED HAVING A LIFT SHAFT AND A BRAKE THROUGH WHICH THE LIFT SHAFT IS ROTATED FOR LIFTING A LOAD, SAID BRAKE INCLUDING A RATCHET AND A DISC MEMBER TO WHICH SAID RATCHET APPLIES AXIAL PRESSURE DEPENDING ON THE LOAD LIFTED BY THE SHAFT, THE IMPROVEMENT THAT COMPRISES MEANS MOUNTING THE DISC MEMBER FOR AXIAL MOVEMENT ON SAID SHAFT IN RESPONSE TO THE PRESSURE APPLIED BY THE RATCHET, AND LOCKING MEANS MOUNTED WITH RESPECT TO SAID SHAFT WHICH IS ACTUATED BY MOVEMENT OF
Claim 2
Dependent Claim
88 words
IN A HOIST OF THE CLASS DESCRIBED HAVING A LIFT SHAFT AND A BRAKE THROUGH WHICH THE LIFT SHAFT IS ROTATED FOR LIFTING A LOAD, SAID BRAKE INCLUDING A RATCHET AND A DISC MEMBER TO WHICH SAID RATCHET APPLIES AXIAL PRESSURE DEPENDING ON THE LOAD LIFTED BY THE SHAFT, THE IMPROVEMENT THAT COMPRISES MEANS MOUNTING THE DISC MEMBER FOR AXIAL MOVEMENT ON SAID SHAFT IN RESPONSE TO THE PRESSURE APPLIED BY THE RATCHET, AND LOCKING MEANS MOUNTED WITH RESPECT TO SAID SHAFT WHICH IS ACTUATED BY MOVEMENT OF
References Cited (Backward Citations)
US1224882A
Cited
US1637383A
Cited
US2202137A
Cited
US2303312A
Cited
US2348611A
Cited
US2378173A
Cited
US2894610A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-22 | 1969-05-24 | 1969-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-22 | 1973-05-24 | 1973-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-22 | 1977-05-24 | 1977-11-23 | $7700.00 | Window Closed / Lapsed |