US3142290A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic lash adjuster
Assignee: —
•
Filing: —
•
Granted: 1964-07-28
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Expires: 1981-07-28
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:52
CPC Classifications
F; F01; F01L; F01L1/00; F01L1/12; F01L1/14; F01L1/146; F01L1/20; F01L1/22; F01L1/24; F01L1/245
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
A HYDRAULIC TAPPET INCLUDING A HOLLOW CYLINDER CLOSED AT ONE END, A PLUNGER MOUNTED FOR RECIPROCATION WITHIN SAID CYLINDER, AN OIL CHAMBER IN SAID PLUNGER, AN OIL PASSAGE THROUGH SAID CYLINDER AND PLUNGER OPENING INTO SAID CHAMBER, AN OIL CHAMBER IN SAID CYLINDER AND YIELDING MEANS IN SAID CYLINDER OIL CHAMBER BIASING SAID PLUNGER AND CYLINDER IN OPPOSITE DIRECTIONS, THE END OF SAID PLUNGER ADJACENT SAID CYLINDER OIL CHAMBER BEING OPEN AND A VALVE IN SAID OPENING CONTROLLING THE FLOW OF OIL TO SAID CYLINDER OIL CHAMBER, AND PASSAGE MEANS, CLOSED BY SAID PLUNGER DURING A NORMAL RANGE OF RELATIVE AXIAL DISPLACEMENT BETWEEN THE CYLINDER AND PLUNGER, CONNECTING THE CYLINDER OIL CHAMBER WITH THE EXTERIOR OF SAID CYLINDER, MOVEMENT OF SAID PLUNGER IN A DIRECTION OUTWARDLY OF SAID CYLINDER, AT AN EXCESSIVE RANGE OF RELATIVE AXIAL DISPLACEMENT BETWEEN THE CYLINDER AND PLUNGER, OPENING SAID PASSAGE MEANS.
Claim 2
Dependent Claim
146 words
A HYDRAULIC TAPPET INCLUDING A HOLLOW CYLINDER CLOSED AT ONE END, A PLUNGER MOUNTED FOR RECIPROCATION WITHIN SAID CYLINDER, AN OIL CHAMBER IN SAID PLUNGER, AN OIL PASSAGE THROUGH SAID CYLINDER AND PLUNGER OPENING INTO SAID CHAMBER, AN OIL CHAMBER IN SAID CYLINDER AND YIELDING MEANS IN SAID CYLINDER OIL CHAMBER BIASING SAID PLUNGER AND CYLINDER IN OPPOSITE DIRECTIONS, THE END OF SAID PLUNGER ADJACENT SAID CYLINDER OIL CHAMBER BEING OPEN AND A VALVE IN SAID OPENING CONTROLLING THE FLOW OF OIL TO SAID CYLINDER OIL CHAMBER, AND PASSAGE MEANS, CLOSED BY SAID PLUNGER DURING A NORMAL RANGE OF RELATIVE AXIAL DISPLACEMENT BETWEEN THE CYLINDER AND PLUNGER, CONNECTING THE CYLINDER OIL CHAMBER WITH THE EXTERIOR OF SAID CYLINDER, MOVEMENT OF SAID PLUNGER IN A DIRECTION OUTWARDLY OF SAID CYLINDER, AT AN EXCESSIVE RANGE OF RELATIVE AXIAL DISPLACEMENT BETWEEN THE CYLINDER AND PLUNGER, OPENING SAID PASSAGE 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) | 1967-07-28 | 1968-01-27 | 1968-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-28 | 1972-01-27 | 1972-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-28 | 1976-01-27 | 1976-07-28 | $7700.00 | Window Closed / Lapsed |