US3139078A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Horizontal hydraulic valve lifter
Assignee: Motors Liquidation Co
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Filing: 1962-06-20
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Granted: 1964-06-30
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Expires: 1982-06-20
Abstract
No abstract record available.
Inventors
- 👤 Louis J Van Slooten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:34
CPC Classifications
F; F01; F01L; F01L1/00; F01L1/20; F01L1/22; F01L1/24; F01L1/245
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
IN A HYDRAULIC VALVE LIFTER HAVING GENERALLY CUPSHAPED CYLINDER AND PLUNGER MEMBERS IN SLIDABLY INTERFITTED NESTED RELATION FORMING A FLUID PRESSURE CHAMBER BETWEEN THEIR RESPECTIVE END WALLS AND A RESEVOIR CHAMBER WITHIN THE PLUNGER MEMBER, PASSAGE MEANS INTERCONNECTING SAID CHAMBERS INCLUDING MEANS OPERATIVE TO RESTRICT FLUID FLOW FROM THE PRESSURE CHAMBER TO THE RESERVOIR CHAMBER RELATIVE TO FLOW THEREBETWEEN IN OPPOSITE DIRECTION, SAID PLUNGER MEMBER HAVING A SEAT MEMBER MOUNTED ON ITS OPEN END, SAID SEAT MEMBER HAVING AN OPENING THEREIN FOR FLOW OF FLUID OUTWARDLY OF THE LIFTER FROM SAID RESERVOIR CHAMBER, A SIDE PORT IN SAID CYLINDER MEMBER
Claim 2
Dependent Claim
100 words
IN A HYDRAULIC VALVE LIFTER HAVING GENERALLY CUPSHAPED CYLINDER AND PLUNGER MEMBERS IN SLIDABLY INTERFITTED NESTED RELATION FORMING A FLUID PRESSURE CHAMBER BETWEEN THEIR RESPECTIVE END WALLS AND A RESEVOIR CHAMBER WITHIN THE PLUNGER MEMBER, PASSAGE MEANS INTERCONNECTING SAID CHAMBERS INCLUDING MEANS OPERATIVE TO RESTRICT FLUID FLOW FROM THE PRESSURE CHAMBER TO THE RESERVOIR CHAMBER RELATIVE TO FLOW THEREBETWEEN IN OPPOSITE DIRECTION, SAID PLUNGER MEMBER HAVING A SEAT MEMBER MOUNTED ON ITS OPEN END, SAID SEAT MEMBER HAVING AN OPENING THEREIN FOR FLOW OF FLUID OUTWARDLY OF THE LIFTER FROM SAID RESERVOIR CHAMBER, A SIDE PORT IN SAID CYLINDER MEMBER
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) | 1967-06-30 | 1967-12-30 | 1968-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-30 | 1971-12-30 | 1972-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-30 | 1975-12-30 | 1976-06-30 | $7700.00 | Window Closed / Lapsed |