Patent US3218875A successfully refreshed from Google Patents.
US3218875A
Expired / Lapsed
US
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Friction type variable speed drive
Assignee: GRANGIER AND CIE ETS
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Filing: 1963-11-06
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Granted: 1965-11-23
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Expires: 1983-11-06
Abstract
No abstract record available.
Inventors
- 👤 Myard Francis Emile
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:24
CPC Classifications
F; F16; F16H; F16H15/00; F16H15/02; F16H15/04; F16H15/06; F16H15/08; F16H15/10; F16H15/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
FRICTION TYPE VARIABLE SPEED DRIVE INCLUDING A DRIVEN ROTOR ON WHICH CURVED SOLIDS OF ROTATION ARE FREELY MOUNTED IN DIRECTIONS AT RIGHT ANGLES TO ITS AXIS OF ROTATION, THE COMMON ENVELOPE OF WHICH SOLIDS IS CIRCULAR, THE SOLIDS OF ROTATION COOPERATING WITH AT LEAST ONE ROTATABLE DRIVE PLATE AND BEING OPERATIVELY CONNECTED TO A MECHANISM FOR DISPLACING THEM FROM THE CENTRE OF THE DRIVE PLATE TOWARDS THE LATTER''S PERIPHERY, THE RADIUS OF CURVATURE OF THE GENERATRICES OF THE SOLIDS OF REVOLUTION BEING CONSTANT THROUGHOUT THE WHOLE OF THEIR LENGTH AND
Claim 2
Dependent Claim
90 words
FRICTION TYPE VARIABLE SPEED DRIVE INCLUDING A DRIVEN ROTOR ON WHICH CURVED SOLIDS OF ROTATION ARE FREELY MOUNTED IN DIRECTIONS AT RIGHT ANGLES TO ITS AXIS OF ROTATION, THE COMMON ENVELOPE OF WHICH SOLIDS IS CIRCULAR, THE SOLIDS OF ROTATION COOPERATING WITH AT LEAST ONE ROTATABLE DRIVE PLATE AND BEING OPERATIVELY CONNECTED TO A MECHANISM FOR DISPLACING THEM FROM THE CENTRE OF THE DRIVE PLATE TOWARDS THE LATTER''S PERIPHERY, THE RADIUS OF CURVATURE OF THE GENERATRICES OF THE SOLIDS OF REVOLUTION BEING CONSTANT THROUGHOUT THE WHOLE OF THEIR LENGTH AND
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) | 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 |