Patent US3229538A successfully refreshed from Google Patents.
US3229538A
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US
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Variable speed drive transmission
Assignee: ROLLER GEAR Ltd
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Filing: 1961-09-25
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Granted: 1966-01-18
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Expires: 1981-09-25
Abstract
No abstract record available.
Inventors
- 👤 Schottler Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:29
CPC Classifications
F; F16; F16H; F16H13/00; F16H13/10; F16H15/00; F16H15/02; F16H15/04; F16H15/06; F16H15/32; F16H15/36; F16H15/38; F16H15/44; F16H61/00; F16H61/66; F16H61/664; F16H61/6647
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
IN A VARIABLE SPEED DRIVE TRANSMISSION INCLUDING A DRIVE SHAFT AND A DRIVEN SHAFT WITH A BALL AND RACE TYPE FRICTIONAL DRIVE CHANGE SPEED MECHANISM HAVING DRIVE ELEMENTS IN FRICTIONAL ENGAGEMENT DRIVINGLY INTERCONNECTING SAID SHAFTS, THE IMPROVEMENT COMPRISING MECHANISM AUTOMATICALLY CONTROLLING DRIVE PRESSURE BETWEEN SAID DRIVE ELEMENTS IN ACCORDANCE WITH THE COEFFICIENT OF FRICTION BETWEEN TWO OF SAID DRIVE ELEMENTS.
Claim 2
Dependent Claim
60 words
IN A VARIABLE SPEED DRIVE TRANSMISSION INCLUDING A DRIVE SHAFT AND A DRIVEN SHAFT WITH A BALL AND RACE TYPE FRICTIONAL DRIVE CHANGE SPEED MECHANISM HAVING DRIVE ELEMENTS IN FRICTIONAL ENGAGEMENT DRIVINGLY INTERCONNECTING SAID SHAFTS, THE IMPROVEMENT COMPRISING MECHANISM AUTOMATICALLY CONTROLLING DRIVE PRESSURE BETWEEN SAID DRIVE ELEMENTS IN ACCORDANCE WITH THE COEFFICIENT OF FRICTION BETWEEN TWO OF SAID DRIVE ELEMENTS.
References Cited (Backward Citations)
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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) | 1969-01-17 | 1969-07-19 | 1970-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-17 | 1973-07-19 | 1974-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-17 | 1977-07-19 | 1978-01-18 | $7700.00 | Window Closed / Lapsed |