Patent US3314337A successfully refreshed from Google Patents.
US3314337A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piston for an expansion engine
Assignee: Dresser Industries Inc
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Filing: 1964-01-31
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Granted: 1967-04-18
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Expires: 1984-01-31
Abstract
No abstract record available.
Inventors
- 👤 William H Payne
- 👤 Ralph E Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:52
CPC Classifications
F; F25; F25B; F25B9/00; F25B9/06; F25B2400/00; F25B2400/14; F25B2400/141
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
IN AN EXPANSION ENGINE INCLUDING A CYLINDER HAVING A BORE AND A CYLINDER HEAD HAVING A RECESS ALINED WITH SAID BORE, THE COMBINATION THEREWITH OF AN ELONGATED PISTON RECIPROCABLY ARRANGED IN SAID BORE AND RECESS, A FIRST ANNULAR WEAR BAND ON SAID PISTON ADJACENT THE END THEREOF REMOTE FROM SAID HEAD, A SECOND AND WIDER ANNULAR WEAR BAND ARRANGED GENERALLY CENTRALLY ON SAID PISTON SO AS TO PROVIDE SAID PISTON WITH AN END PORTION PROJECTING AXIALLY TOWARD SAID HEAD, SAID SECOND WEAR BAND NEVER CONTACTING SAID HEAD DURING RECIPROCATION OF SAID PISTON, AND SEALING RINGS CARRIED BY SAID PISTON INTERMEDIATE SAID WEAR BANDS.
Claim 2
Dependent Claim
103 words
IN AN EXPANSION ENGINE INCLUDING A CYLINDER HAVING A BORE AND A CYLINDER HEAD HAVING A RECESS ALINED WITH SAID BORE, THE COMBINATION THEREWITH OF AN ELONGATED PISTON RECIPROCABLY ARRANGED IN SAID BORE AND RECESS, A FIRST ANNULAR WEAR BAND ON SAID PISTON ADJACENT THE END THEREOF REMOTE FROM SAID HEAD, A SECOND AND WIDER ANNULAR WEAR BAND ARRANGED GENERALLY CENTRALLY ON SAID PISTON SO AS TO PROVIDE SAID PISTON WITH AN END PORTION PROJECTING AXIALLY TOWARD SAID HEAD, SAID SECOND WEAR BAND NEVER CONTACTING SAID HEAD DURING RECIPROCATION OF SAID PISTON, AND SEALING RINGS CARRIED BY SAID PISTON INTERMEDIATE SAID WEAR BANDS.
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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) | 1970-04-17 | 1970-10-17 | 1971-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-17 | 1974-10-17 | 1975-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-17 | 1978-10-17 | 1979-04-18 | $7700.00 | Window Closed / Lapsed |