US3280646A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control system for an infinitely variable speed friction drive
Assignee: Ford Motor Co
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Filing: 1966-02-02
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Granted: 1966-10-25
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Expires: 1986-02-02
Abstract
No abstract record available.
Inventors
- 👤 George E Lemieux
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:30
CPC Classifications
F; F16; F16H; F16H61/00; F16H61/66; F16H61/664; F16H61/6648; Y; Y10; Y10S; Y10S74/00; Y10S74/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
A CONTROL CIRCUIT FOR A FRICTION DRIVE TRANSMISSION HAVING A PAIR OF RADIALLY SPACED RACES AT LEAST ONE OF WHICH IS ROTATABLE RELATIVE TO THE OTHER, SAID RACES ENCLOSING A RADIALLY ADJUSTABLE ROLLING ELEMENT FRICTIONALLY ENGAGED THEREBETWEEN, EACH OF SAID RACES HAVING AXIALLY SPACED AND CONNECTED ELEMENTS SLIDABLE TOWARDS OR AWAY FROM EACH OTHER TO RADIALLY MOVE SAID ROLLING ELEMENT AND EFFECT A CHANGE IN THE DRIVE RATIO OF SAID TRANSMISSION, INCLUDING, IN COMBINATION, FLUID PRESSURE SERVO MEANS ASSOCIATED WITH EACH OF SAID RACES FOR CLAMPING SAID ELEMENTS TOGETHER FOR TRANSMITTING A DRIVE THROUGH SAID TRANSMISSION, A SOURCE OF FLUID UNDER PRESSURE, CONDUIT MEANS CONNECTING SAID SOURCE AND EACH OF SAID SERVO MEANS, AND FLUID PRESSURE CONTROL MEANS IN SAID CONDUIT MEANS MOVABLE TO VARY THE LEVEL OF THE FLUID PRESSURE DIRECTED TO EACH OF SAID SERVO MEANS UPON A CHANGE IN THE FLUID PRESSURE TO ONE OF SAID SERVO MEANS.
Claim 2
Dependent Claim
151 words
A CONTROL CIRCUIT FOR A FRICTION DRIVE TRANSMISSION HAVING A PAIR OF RADIALLY SPACED RACES AT LEAST ONE OF WHICH IS ROTATABLE RELATIVE TO THE OTHER, SAID RACES ENCLOSING A RADIALLY ADJUSTABLE ROLLING ELEMENT FRICTIONALLY ENGAGED THEREBETWEEN, EACH OF SAID RACES HAVING AXIALLY SPACED AND CONNECTED ELEMENTS SLIDABLE TOWARDS OR AWAY FROM EACH OTHER TO RADIALLY MOVE SAID ROLLING ELEMENT AND EFFECT A CHANGE IN THE DRIVE RATIO OF SAID TRANSMISSION, INCLUDING, IN COMBINATION, FLUID PRESSURE SERVO MEANS ASSOCIATED WITH EACH OF SAID RACES FOR CLAMPING SAID ELEMENTS TOGETHER FOR TRANSMITTING A DRIVE THROUGH SAID TRANSMISSION, A SOURCE OF FLUID UNDER PRESSURE, CONDUIT MEANS CONNECTING SAID SOURCE AND EACH OF SAID SERVO MEANS, AND FLUID PRESSURE CONTROL MEANS IN SAID CONDUIT MEANS MOVABLE TO VARY THE LEVEL OF THE FLUID PRESSURE DIRECTED TO EACH OF SAID SERVO MEANS UPON A CHANGE IN THE FLUID PRESSURE TO ONE OF SAID SERVO 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) | 1969-10-24 | 1970-04-25 | 1970-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-24 | 1974-04-25 | 1974-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-24 | 1978-04-25 | 1978-10-25 | $7700.00 | Window Closed / Lapsed |