US3079903A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic tappet
Assignee: Johnson Products Inc
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Filing: 1962-05-07
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Granted: 1963-03-05
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Expires: 1982-05-07
Abstract
No abstract record available.
Inventors
- 👤 John W Humphreys
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:07
CPC Classifications
F; F01; F01L; F01L1/00; F01L1/20; F01L1/22; F01L1/24; F01L1/245
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
150 words
A HORIZONTALLY OPERABLE HYDRAULIC TAPPET COMPRISING: A VALVE TAPPET HOUSING; PLUNGER MEANS OPERABLE IN SAID HOUSING; A PRESSURE CHAMBER FORMED BETWEEN THE END OF SAID PLUNGER MEANS AND SAID HOUSING; A RESERVOIR FORMED IN SAID PLUNGER MEANS; FLOW CONTROL MEANS ASSOCIATED WITH THE END OF SAID PLUNGER MEANS PROVIDING ONEWAY COMMUNICATION BETWEEN SAID PRESSURE CHAMBER AND SAID RESERVOIR; HYDRAULIC FLUID INLET MEANS IN SAID RESERVOIR; AT LEAST ONE PARTITION ACROSS SAID RESERVOIR BETWEEN SAID CONTROL MEANS AND SAID INLET MEANS; A VALVELESS ORIFICE IN SAID PARTITION HAVING AN AXIS FORMED ON AN IMAGINARY STRAIGHT LINE EXTENDING THROUGH SAID PARTITION; SAID ORIFICE BEING CAPABLE OF FREELY PASSING PRESSURIZED HYDRAULIC FLUID WHEN SAID TAPPET IS IN OPERATION; AND SAID ORIFICE HAVING A DIAMETER NO GREATER THAN ABOUT 3/32 OF AN INCH TO PREVENT UNPRESSURIZED HYDRAULIC FLUID FROM FLOWING THERETHROUGH AND OUT OF SAID RESERVOIR WHEN SAID HORIZONTAL TAPPET IS NOT IN OPERATION.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-03-04 | 1966-09-03 | 1967-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-04 | 1970-09-03 | 1971-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-04 | 1974-09-03 | 1975-03-05 | $7700.00 | Window Closed / Lapsed |