US3203671A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hoist control mechanism
Assignee: Individual
•
Filing: 1963-04-11
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Granted: 1965-08-31
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Expires: 1983-04-11
Abstract
No abstract record available.
Inventors
- 👤 Anderson John Leavitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:57
CPC Classifications
B; B66; B66D; B66D3/00; B66D3/18; B66D3/24; B66D1/00; B66D1/28; B66D2700/00; B66D2700/01; B66D2700/0183
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
160 words
CONTROL FOR A LINE TAKE-UP MECHANISM OF THE TYPE HAVING A ROTARY DRUM AND MEANS FOR DRIVING THE DRUM, SAID CONTROL COMPRISING: (A) A SHAFT MEMBER ADAPTED FOR CONNECTION TO AND ROTATION BY SAID TAKE-UP MECHANISM HAVING EXTERNAL THREADS THEREON; (B) AT LEAST ONE INTERNALLY THREADED PROJECTABLE NUT MEMBER THREADABLY MOUNTED ON SAID SCREW SHAFT AND HAVING A PLURALITY OF RECESSES IN THE OUTER PERIPHERAL SURFACE THEREOF; (C) HOLDING MEANS HAVING A RECESS RECEIVING FLANGE FOR INTERFITTING WITH A SELECTED RECESS OF SUCH NUT TO PERMIT RECTILINEAR MOVEMENT OF SAID NUT WHILE PREVENTING ROTATION THEREOF, SAID HOLDING MEANS BEING SHIFTABLY MOUNTED TO PERMIT MOVEMENT FROM A SELECTED RECESS WHEREBY THE POSITION OF THE NUT MAY BE INITIALLY ADJUSTED; (D) LOCKING MEANS POSITIVELY CONNECTED TO SAID HOLDING MEANS FOR POSITIVELY HOLDING SAID RECESS RECEIVING FLANGE IN ENGAGEMENT WITH A SELECTED RECESS; AND (E) MEANS MOUNTED IN COOPERATIVE RELATION TO SAID PROJECTABLE NUT MEMBER AND RESPONSIVE THERETO FOR STOPPING THE DRIVING MEANS.
Claim 2
Dependent Claim
160 words
CONTROL FOR A LINE TAKE-UP MECHANISM OF THE TYPE HAVING A ROTARY DRUM AND MEANS FOR DRIVING THE DRUM, SAID CONTROL COMPRISING: (A) A SHAFT MEMBER ADAPTED FOR CONNECTION TO AND ROTATION BY SAID TAKE-UP MECHANISM HAVING EXTERNAL THREADS THEREON; (B) AT LEAST ONE INTERNALLY THREADED PROJECTABLE NUT MEMBER THREADABLY MOUNTED ON SAID SCREW SHAFT AND HAVING A PLURALITY OF RECESSES IN THE OUTER PERIPHERAL SURFACE THEREOF; (C) HOLDING MEANS HAVING A RECESS RECEIVING FLANGE FOR INTERFITTING WITH A SELECTED RECESS OF SUCH NUT TO PERMIT RECTILINEAR MOVEMENT OF SAID NUT WHILE PREVENTING ROTATION THEREOF, SAID HOLDING MEANS BEING SHIFTABLY MOUNTED TO PERMIT MOVEMENT FROM A SELECTED RECESS WHEREBY THE POSITION OF THE NUT MAY BE INITIALLY ADJUSTED; (D) LOCKING MEANS POSITIVELY CONNECTED TO SAID HOLDING MEANS FOR POSITIVELY HOLDING SAID RECESS RECEIVING FLANGE IN ENGAGEMENT WITH A SELECTED RECESS; AND (E) MEANS MOUNTED IN COOPERATIVE RELATION TO SAID PROJECTABLE NUT MEMBER AND RESPONSIVE THERETO FOR STOPPING THE DRIVING MEANS.
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) | 1968-08-30 | 1969-03-01 | 1969-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-30 | 1973-03-01 | 1973-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-30 | 1977-03-01 | 1977-08-31 | $7700.00 | Window Closed / Lapsed |