US3109418A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic valve push rod assembly
Assignee: Individual
•
Filing: 1962-02-23
•
Granted: 1963-11-05
•
Expires: 1982-02-23
Abstract
No abstract record available.
Inventors
- 👤 William C Exline
- 👤 Clyde O Caywood
- 👤 Elmer J Gardner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:28
CPC Classifications
F; F01; F01L; F01L1/00; F01L1/20; F01L1/22; F01L1/24; F01L1/2422
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
167 words
A SHOCK ABSORBING AND SELF ADJUSTING COMPRESSIVE FORCE TRANSMITTING DEVICE COMPRISING: (A) A RIGID CASING HAVING AN UPPER END AND A LOWER END, (B) SAID CASING HAVING AN INTERNAL WALL FORMING A PISTON RECEIVING CHAMBER EXTENDING THEREINTO FROM SAID UPPER END AND CLOSED AT THE BOTTOM THEREOF, (C) A PISTON IN SAID PISTON RECEIVING CHAMBER AND SLIDABLY COOPERATING WITH SAID WALL, (D) CLEARANCE BETWEEN SAID PISTON AND SAID WALL FORMING AN UPWARDLY EXTENDING FLUID CONDUIT, (E) SAID PISTON HAVING AN UPPER END AND A LOWER END AND AN INTERIOR INCLUDING UPPER AND LOWER CHAMBERS COMMUNICATING WITH EACH OTHER, SAID PISTON UPPER CHAMBER HAVING A TOP PORTION, (F) A CHECK VALVE SEAT MEMBER SECURED IN SAID PISTON LOWER CHAMBER AND HAVING A DOWNWARDLY FACING VALVE SEAT CAVITY AND A PASSAGEWAY OF GREATER CROSS-SECTIONAL AREA THAN SAID FLUID CONDUIT AND COMMUNICATING BETWEEN SAID VALVE SEAT CAVITY AND SAID PISTON UPPER CHAMBER, (G) MEANS PREVENTING FLUID FLOW BETWEEN SAID PISTON UPPER AND LOWER CHAMBERS EXCEPT THROUGH SAID SEAT MEMBER PASSAGEWAY,
Claim 2
Dependent Claim
167 words
A SHOCK ABSORBING AND SELF ADJUSTING COMPRESSIVE FORCE TRANSMITTING DEVICE COMPRISING: (A) A RIGID CASING HAVING AN UPPER END AND A LOWER END, (B) SAID CASING HAVING AN INTERNAL WALL FORMING A PISTON RECEIVING CHAMBER EXTENDING THEREINTO FROM SAID UPPER END AND CLOSED AT THE BOTTOM THEREOF, (C) A PISTON IN SAID PISTON RECEIVING CHAMBER AND SLIDABLY COOPERATING WITH SAID WALL, (D) CLEARANCE BETWEEN SAID PISTON AND SAID WALL FORMING AN UPWARDLY EXTENDING FLUID CONDUIT, (E) SAID PISTON HAVING AN UPPER END AND A LOWER END AND AN INTERIOR INCLUDING UPPER AND LOWER CHAMBERS COMMUNICATING WITH EACH OTHER, SAID PISTON UPPER CHAMBER HAVING A TOP PORTION, (F) A CHECK VALVE SEAT MEMBER SECURED IN SAID PISTON LOWER CHAMBER AND HAVING A DOWNWARDLY FACING VALVE SEAT CAVITY AND A PASSAGEWAY OF GREATER CROSS-SECTIONAL AREA THAN SAID FLUID CONDUIT AND COMMUNICATING BETWEEN SAID VALVE SEAT CAVITY AND SAID PISTON UPPER CHAMBER, (G) MEANS PREVENTING FLUID FLOW BETWEEN SAID PISTON UPPER AND LOWER CHAMBERS EXCEPT THROUGH SAID SEAT MEMBER PASSAGEWAY,
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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) | 1966-11-04 | 1967-05-06 | 1967-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-11-04 | 1971-05-06 | 1971-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-11-04 | 1975-05-06 | 1975-11-05 | $7700.00 | Window Closed / Lapsed |