Patent US3301142A successfully refreshed from Google Patents.
US3301142A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid pressure operated clutch and vent valve assembly
Assignee: Ford Motor Co
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Filing: 1965-05-24
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Granted: 1967-01-31
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Expires: 1985-05-24
Abstract
No abstract record available.
Inventors
- 👤 Cenko John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:36
CPC Classifications
F; F16; F16D; F16D25/00; F16D25/06; F16D25/062; F16D25/063; F16D25/0635; F16D25/0638; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7869
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
A VENT VALVE ASSEMBLY FOR USE WITH A ROTATABLE FLUID PRESSURE OPERATED CLUTCH SERVO HAVING AN ANNULAR PISTON MEMBER AND AN ANNULAR CYLINDER MEMBER THAT COOPERATE TO DEFINE AN ANNULAR PRESSURE CHAMBER, AN OPENING FORMED IN ONE OF SAID MEMBERS, A FIRST VALVE ELEMENT HAVING A FRUSTO-CONICAL SURFACE POSITIONED AT LEAST IN PART IN SAID OPENING, A VALVE OPENING IN SAID FIRST VALVE ELEMENT, A SECOND VALVE ELEMENT ADAPTED TO REGISTER WITH SAID VALVE OPENING AND INCLUDING A PLURALITY OF SPRING FINGERS ENGAGEABLE WITH SAID FRUSTO-CONICAL SURFACE THEREBY PRODUCING A FORCE COMPONENT TENDING TO URGE SAID SECOND VALVE ELEMENT OUT OF REGISTRY WITH SAID VALVE OPENING, SAID SECOND VALVE ELEMENT BEING RESPONSE TO A PRESSURE BUILD-UP IN SAID CHAMBER TO MOVE INTO REGISTRY WITH SAID VALVE OPENING AGAINST THE OPPOSING INFLUENCE OF SAID FORCE COMPONENT.
Claim 2
Dependent Claim
135 words
A VENT VALVE ASSEMBLY FOR USE WITH A ROTATABLE FLUID PRESSURE OPERATED CLUTCH SERVO HAVING AN ANNULAR PISTON MEMBER AND AN ANNULAR CYLINDER MEMBER THAT COOPERATE TO DEFINE AN ANNULAR PRESSURE CHAMBER, AN OPENING FORMED IN ONE OF SAID MEMBERS, A FIRST VALVE ELEMENT HAVING A FRUSTO-CONICAL SURFACE POSITIONED AT LEAST IN PART IN SAID OPENING, A VALVE OPENING IN SAID FIRST VALVE ELEMENT, A SECOND VALVE ELEMENT ADAPTED TO REGISTER WITH SAID VALVE OPENING AND INCLUDING A PLURALITY OF SPRING FINGERS ENGAGEABLE WITH SAID FRUSTO-CONICAL SURFACE THEREBY PRODUCING A FORCE COMPONENT TENDING TO URGE SAID SECOND VALVE ELEMENT OUT OF REGISTRY WITH SAID VALVE OPENING, SAID SECOND VALVE ELEMENT BEING RESPONSE TO A PRESSURE BUILD-UP IN SAID CHAMBER TO MOVE INTO REGISTRY WITH SAID VALVE OPENING AGAINST THE OPPOSING INFLUENCE OF SAID FORCE COMPONENT.
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) | 1970-01-30 | 1970-08-01 | 1971-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-30 | 1974-08-01 | 1975-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-30 | 1978-08-01 | 1979-01-31 | $7700.00 | Window Closed / Lapsed |