US3216651A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seal
Assignee: Battelle Development Corp
•
Filing: 1963-07-01
•
Granted: 1965-11-09
•
Expires: 1983-07-01
Abstract
No abstract record available.
Inventors
- 👤 Robert W King
- 👤 Raymond T Law
- 👤 William W Vogelhuber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:43
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/002; F16J15/008
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
118 words
IN A FREE-PISTON-ENGINE COMPRESSOR HAVING A RECIPROCATING PISTON ROD, A COMPOSITE SEAL COMPRISING: (A) A LIQUID-FILLED CHAMBER SURROUNDING THE PISTON ROD; (B) A SEALING MEMBER ON EACH SIDE OF SAID LIQUID-FILLED CHAMBER, EACH SAID SEALING MEMBER BEING POSITIONED CLOSELY AROUND THE PISTON ROD THEREBY MINIMIZING LEAKAGE OF LIQUID FROM SAID LIQUID-FILLED CHAMBER DURING RECIPROCATION OF THE PISTON ROD; (C) A RESILIENT MEMBER DISPOSED IN SAID LIQUID-FILLED CHAMBER AND SURROUNDING THE PISTON ROD; AND (D) A MOVABLE MEMBER IN SAID LIQUID-FILLED CHAMBER POSITIONED TO ENGAGE AND COMPRESS SAID RESILIENT MEMBER SEALING OFF SAID LIQUID-FILLED CHAMBER AFTER THE COMPRESSOR IS SHUT OFF, SAID MOVABLE MEMBER BEING ACTIVATED BY THE RESIDUAL PRESSURE OF SAID COMPRESSOR AFTER THE COMPRESSOR IS SHUT OFF.
References Cited (Backward Citations)
US1903210A
Cited
US2973135A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-08 | 1969-05-10 | 1969-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-08 | 1973-05-10 | 1973-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-08 | 1977-05-10 | 1977-11-09 | $7700.00 | Window Closed / Lapsed |