US3291107A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature compensating hydraulic tappet
Assignee: Johnson Products Inc
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Filing: 1965-06-16
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Granted: 1966-12-13
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Expires: 1985-06-16
Abstract
No abstract record available.
Inventors
- 👤 Richard D Cornell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:11
CPC Classifications
F; F16; F16K; F16K25/00; F16K25/04; F01; F01L; F01L1/00; F01L1/20; F01L1/22; F01L1/24; F01L1/245; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/49298; Y10T29/49304
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
159 words
IN A TEMPERATURE COMPENSATING HYDRAULIC TAPPET FOR AN INTERNAL COMBUSTION ENGINE, HAVING A HOLLOW TAPPET BODY HAVING ONE CLOSED END WILL AN OUTER CAM FOLLOWER SURFACE, AND ONE OPEN END, AND AXIALLY MOVABLE PLUNGER IN SAID BODY; SAID PLUNGER HAVING AN OUTER PERIPHERAL SURFACE SPACED SLIGHTLY FROM SAID BODY TO FORM AN OIL PASSAGE THEREBETWEN, SAID PLUNGER BEING HOLLOW, WITH AN INNER PERIPHERAL SURFACE, AND HAVING A PASSAGEWAY OPENING AND AN INTEGRALLY FORMED VALVE SEAT ON ITS INNER END AND A PUSH ROD SET RECEIVING OPENING ON ITS OPPOSITE END ADJACENT SAID BODY OPEN END; SAID TAPPET BODY COMPRISING A CAST IRON BODY HAVING A RELATIVELY LOW THERMAL EXPANSION RATE; SAID PLUNGER HAVING AN ALUMINUM CORE WITH A RELATIVELY HIGH THERMAL EXPANSION RATE, AND HAVING AN INTEGRAL, HARD SURFACE, ENVELOPING CASE JACKET OF 0.0005 TO 0.0025 INCH THICKNESS OF ALUMINUM OXIDE OVER ITS ENTIRE SURFACE AREA INCLUDING SAID VALVE SEAT, SAID JACKET EFFECTING STRENGTH REINFORCING FOR THE ENTIRE PLUNGER.
Claim 2
Dependent Claim
159 words
IN A TEMPERATURE COMPENSATING HYDRAULIC TAPPET FOR AN INTERNAL COMBUSTION ENGINE, HAVING A HOLLOW TAPPET BODY HAVING ONE CLOSED END WILL AN OUTER CAM FOLLOWER SURFACE, AND ONE OPEN END, AND AXIALLY MOVABLE PLUNGER IN SAID BODY; SAID PLUNGER HAVING AN OUTER PERIPHERAL SURFACE SPACED SLIGHTLY FROM SAID BODY TO FORM AN OIL PASSAGE THEREBETWEN, SAID PLUNGER BEING HOLLOW, WITH AN INNER PERIPHERAL SURFACE, AND HAVING A PASSAGEWAY OPENING AND AN INTEGRALLY FORMED VALVE SEAT ON ITS INNER END AND A PUSH ROD SET RECEIVING OPENING ON ITS OPPOSITE END ADJACENT SAID BODY OPEN END; SAID TAPPET BODY COMPRISING A CAST IRON BODY HAVING A RELATIVELY LOW THERMAL EXPANSION RATE; SAID PLUNGER HAVING AN ALUMINUM CORE WITH A RELATIVELY HIGH THERMAL EXPANSION RATE, AND HAVING AN INTEGRAL, HARD SURFACE, ENVELOPING CASE JACKET OF 0.0005 TO 0.0025 INCH THICKNESS OF ALUMINUM OXIDE OVER ITS ENTIRE SURFACE AREA INCLUDING SAID VALVE SEAT, SAID JACKET EFFECTING STRENGTH REINFORCING FOR THE ENTIRE PLUNGER.
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) | 1969-12-12 | 1970-06-13 | 1970-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-12 | 1974-06-13 | 1974-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-12 | 1978-06-13 | 1978-12-13 | $7700.00 | Window Closed / Lapsed |