Patent US3295857A successfully refreshed from Google Patents.
US3295857A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piston ring assembly
Assignee: Clevite Industries Inc
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Filing: 1963-07-29
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Granted: 1967-01-03
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Expires: 1983-07-29
Abstract
No abstract record available.
Inventors
- 👤 John O Lutz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:19
CPC Classifications
F; F16; F16J; F16J9/00; F16J9/06; F16J9/064; F16J9/066; F16J9/067; F16J9/061; F16J9/063
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
A PISTON RING ASSEMBLY COMPRISING FIRST AND SECOND SPLIT RING MEMBER IN OVERLYING DISPOSITION, EACH RING MEMBER HAVING A RECESS ON ITS INNER PERIPHERY, SAID RECESSES EXTENDING THROUGH SAID RINGS, SAID RINGS BEING POSITIONED SO THAT SAID RECESSES ARE ALIGNED, THE DISTANCE FROM THE RECESS ON THE FIRST RING MEMBER TO THE SPLIT ON THE FIRST RING MEMBER BEING GREATER THAN THE CORRESPONDING DISTANCE ON THE SECOND RING MEMBER, AN EXPANDER WITHIN SAID RING MEMBERS BIASING SAID RING MEMBERS RADIALLY OUTWARDLY, SAID EXPANDER HAVING AN UNDULATING PERIPHERY OF PROJECTIONS AND VALLEYS, SAID EXPANDER HAVING A PORTION DISPOSED WITHIN SAID RECESSES THEREBY RETAINING A PREDETERMINED RELATIVE ROTATIVE DISPOSITION BETWEEN THE SPLITS ON
Claim 2
Dependent Claim
111 words
A PISTON RING ASSEMBLY COMPRISING FIRST AND SECOND SPLIT RING MEMBER IN OVERLYING DISPOSITION, EACH RING MEMBER HAVING A RECESS ON ITS INNER PERIPHERY, SAID RECESSES EXTENDING THROUGH SAID RINGS, SAID RINGS BEING POSITIONED SO THAT SAID RECESSES ARE ALIGNED, THE DISTANCE FROM THE RECESS ON THE FIRST RING MEMBER TO THE SPLIT ON THE FIRST RING MEMBER BEING GREATER THAN THE CORRESPONDING DISTANCE ON THE SECOND RING MEMBER, AN EXPANDER WITHIN SAID RING MEMBERS BIASING SAID RING MEMBERS RADIALLY OUTWARDLY, SAID EXPANDER HAVING AN UNDULATING PERIPHERY OF PROJECTIONS AND VALLEYS, SAID EXPANDER HAVING A PORTION DISPOSED WITHIN SAID RECESSES THEREBY RETAINING A PREDETERMINED RELATIVE ROTATIVE DISPOSITION BETWEEN THE SPLITS ON
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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) | 1970-01-02 | 1970-07-04 | 1971-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-02 | 1974-07-04 | 1975-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-02 | 1978-07-04 | 1979-01-03 | $7700.00 | Window Closed / Lapsed |