Patent US3146767A successfully refreshed from Google Patents.
US3146767A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic tappet
Assignee: Johnson Products Inc
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Filing: 1963-05-16
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Granted: 1964-09-01
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Expires: 1983-05-16
Abstract
No abstract record available.
Inventors
- 👤 Morris V Dadd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:21
CPC Classifications
F; F01; F01L; F01L1/00; F01L1/20; F01L1/22; F01L1/24; F01L1/245
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
187 words
IN AN ENGINE HAVING A VALVE MEANS ACTUATED BY A VALVE TRAIN INCLUDING A ROCKER ARM ASSEMBLY, A PUSH ROD AND A HYDRAULIC TAPPET COMPRISING: SAID ROCKER ARM ASSEMBLY HAVING A SOURCE OF OIL; SAID PUSH ROD HAVING A PASSAGEWAY THERETHROUGH COMMUNICATING WITH SAID SOURCE OF OIL; SAID TAPPET HAVING A BODY WITH AN INTERNAL BORE AND A CLOSED END AND AN OPEN END, A PLUNGER RECIPROCALLY MOUNTED WITHIN SAID BORE, SAID PLUNGER INCLUDING A BOTTOM WALL HAVING AN OPENING THEREIN, SAID WALL FORMING BETWEEN IT AND SAID CLOSED END A COMPRESSION CHAMBER; SAID PUSH ROD EXTENDING THROUGH SAID OPEN END AND DIRECTLY ENGAGING SAID BOTTOM WALL OF SAID PLUNGER; A CHECK VALVE IN SAID OPENING; SAID PASSAGEWAY OF SAID PUSH ROD BEING AXIALLY ALIGNED AND LOCATED OVER SAID OPENING PROVIDING DIRECT COMMUNICATION BETWEEN SAID PASSAGEWAY AND SAID OPENING WHEREBY SAID COMPRESSION CHAMBER IS SUPPLIED BY OIL FROM SAID ROCKER ARM SOURCE OF OIL DIRECTLY THROUGH AND FROM SAID PUSH ROD; SAID PUSH ROD PASSAGEWAY SERVING AS A RESERVOIR FOR SUPPLYING OIL TO SAID COMPRESSION CHAMBER WHEN THE SUPPLY OF OIL FROM SAID SOURCE IS TEMPORARILY STOPPED.
Claim 2
Dependent Claim
187 words
IN AN ENGINE HAVING A VALVE MEANS ACTUATED BY A VALVE TRAIN INCLUDING A ROCKER ARM ASSEMBLY, A PUSH ROD AND A HYDRAULIC TAPPET COMPRISING: SAID ROCKER ARM ASSEMBLY HAVING A SOURCE OF OIL; SAID PUSH ROD HAVING A PASSAGEWAY THERETHROUGH COMMUNICATING WITH SAID SOURCE OF OIL; SAID TAPPET HAVING A BODY WITH AN INTERNAL BORE AND A CLOSED END AND AN OPEN END, A PLUNGER RECIPROCALLY MOUNTED WITHIN SAID BORE, SAID PLUNGER INCLUDING A BOTTOM WALL HAVING AN OPENING THEREIN, SAID WALL FORMING BETWEEN IT AND SAID CLOSED END A COMPRESSION CHAMBER; SAID PUSH ROD EXTENDING THROUGH SAID OPEN END AND DIRECTLY ENGAGING SAID BOTTOM WALL OF SAID PLUNGER; A CHECK VALVE IN SAID OPENING; SAID PASSAGEWAY OF SAID PUSH ROD BEING AXIALLY ALIGNED AND LOCATED OVER SAID OPENING PROVIDING DIRECT COMMUNICATION BETWEEN SAID PASSAGEWAY AND SAID OPENING WHEREBY SAID COMPRESSION CHAMBER IS SUPPLIED BY OIL FROM SAID ROCKER ARM SOURCE OF OIL DIRECTLY THROUGH AND FROM SAID PUSH ROD; SAID PUSH ROD PASSAGEWAY SERVING AS A RESERVOIR FOR SUPPLYING OIL TO SAID COMPRESSION CHAMBER WHEN THE SUPPLY OF OIL FROM SAID SOURCE IS TEMPORARILY STOPPED.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-01 | 1968-03-02 | 1968-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-01 | 1972-03-02 | 1972-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-01 | 1976-03-02 | 1976-09-01 | $7700.00 | Window Closed / Lapsed |