Patent US3237471A successfully refreshed from Google Patents.
US3237471A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable-pitch sheave
Assignee: Ernst Heinkel AG
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Filing: 1964-01-31
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Granted: 1966-03-01
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Expires: 1984-01-31
Abstract
No abstract record available.
Inventors
- 👤 Wunsch Erich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:43
CPC Classifications
F; F16; F16H; F16H55/00; F16H55/32; F16H55/52; F16H55/56
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
A VARIABLE-PITCH SHEAVE, COMPRISING A SHAFT; A FLANGE INCLUDING A CENTRAL PORTION AXIALLY MOVABLY MOUNTED ON SAID SHAFT; AND A BEARING DISPOSED BETWEEN SAID CENTRAL PORTION AND THE PERIPHERY OF SAID SHAFT, SAID BEARING INCLUDING AT LEAST ONE BEARING ELEMENT WHICH COMPRISES AN ANNULUS OF HELICAL CONVOLUTIONS ARRANGED TO ROLL ALONG THE PERIPHERY OF SAID SHAFT IN RESPONSE TO AXIAL MOVEMENTS OF SAID FLANGE.
Claim 2
Dependent Claim
64 words
A VARIABLE-PITCH SHEAVE, COMPRISING A SHAFT; A FLANGE INCLUDING A CENTRAL PORTION AXIALLY MOVABLY MOUNTED ON SAID SHAFT; AND A BEARING DISPOSED BETWEEN SAID CENTRAL PORTION AND THE PERIPHERY OF SAID SHAFT, SAID BEARING INCLUDING AT LEAST ONE BEARING ELEMENT WHICH COMPRISES AN ANNULUS OF HELICAL CONVOLUTIONS ARRANGED TO ROLL ALONG THE PERIPHERY OF SAID SHAFT IN RESPONSE TO AXIAL MOVEMENTS OF SAID FLANGE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-28 | 1969-08-30 | 1970-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-28 | 1973-08-30 | 1974-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-28 | 1977-08-30 | 1978-03-01 | $7700.00 | Window Closed / Lapsed |