Patent US3137211A successfully refreshed from Google Patents.
US3137211A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compound uniflow steam engine
Assignee: Individual
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Filing: 1961-05-01
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Granted: 1964-06-16
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Expires: 1981-05-01
Abstract
No abstract record available.
Inventors
- 👤 Jr Russell Grinnell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:54
CPC Classifications
F; F01; F01B; F01B17/00; F01B17/02; F01B17/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
215 words
A COMPOUND UNIFLOW STEAM ENGINE COMPRISING A CYLINDER HAVING CLOSURE END WALLS AT OPPOSITE ENDS AND PISTON MEANS SLIDABLY DISPOSED BETWEEN SAID END WALLS DEFINING FIRST AND SECOND WORK CHAMBERS BETWEEN SAID END WALLS AND SAID PISTON AT FIRST AND SECOND END PORTIONS OF SAID CYLINDER RESPECTIVELY, SAID PISTON MEANS HAVING A LARGER TRANSVERSE SECTIONAL HEAD AREA DISPOSED IN SAID SECOND CHAMBER THAN IN SAID FIRST CHAMBER, FIRST WORK CHAMBER STEAM INLET MEANS INCLUDING FIRST VALVE MEANS ADAPTED TO BE OPERATED IN RESPONSE TO MOVEMENT OF SAID PISTON MEANS TO SAID FIRST END PORTION OF SAID CYLINDER AND DURING SUBSEQUENT MOVEMENT OF SAID PISTON MEANS BACK TOWARD SAID SECOND END PORTION OF SAID CYLINDER FOR ADMITTING STEAM UNDER PRESSURE TO SAID FIRST WORK CHAMBER, PASSAGE MEANS FORMED IN AND OPENING THROUGH OPPOSITE ENDS OF SAID PISTON AT POINTS SPACED INWARDLY OF THE ADJACENT PERIPHERAL PORTIONS OF SAID PISTON AND COMMUNICATING SAID FIRST WORK CHAMBER WITH SAID SECOND WORK CHAMBER, SAID PASSAGE MEANS INCLUDING SECOND VALVE MEANS OPERABLE IN SECOND WORK CHAMBER INCLUDING SECOND VALVE MEANS OPERABLE IN RESPONSE TO MOVEMENT OF SAID PISTON MEANS TO SAID SECOND END PORTION OF SAID CYLINDER AND DURING MOVEMENT OF SAID PISTON MEANS TO SAID FIRST END PORTION OF SAID CYLINDER FOR COMMUNICATING SAID FIRST AND SECOND WORK CHAMBERS.
Claim 2
Dependent Claim
215 words
A COMPOUND UNIFLOW STEAM ENGINE COMPRISING A CYLINDER HAVING CLOSURE END WALLS AT OPPOSITE ENDS AND PISTON MEANS SLIDABLY DISPOSED BETWEEN SAID END WALLS DEFINING FIRST AND SECOND WORK CHAMBERS BETWEEN SAID END WALLS AND SAID PISTON AT FIRST AND SECOND END PORTIONS OF SAID CYLINDER RESPECTIVELY, SAID PISTON MEANS HAVING A LARGER TRANSVERSE SECTIONAL HEAD AREA DISPOSED IN SAID SECOND CHAMBER THAN IN SAID FIRST CHAMBER, FIRST WORK CHAMBER STEAM INLET MEANS INCLUDING FIRST VALVE MEANS ADAPTED TO BE OPERATED IN RESPONSE TO MOVEMENT OF SAID PISTON MEANS TO SAID FIRST END PORTION OF SAID CYLINDER AND DURING SUBSEQUENT MOVEMENT OF SAID PISTON MEANS BACK TOWARD SAID SECOND END PORTION OF SAID CYLINDER FOR ADMITTING STEAM UNDER PRESSURE TO SAID FIRST WORK CHAMBER, PASSAGE MEANS FORMED IN AND OPENING THROUGH OPPOSITE ENDS OF SAID PISTON AT POINTS SPACED INWARDLY OF THE ADJACENT PERIPHERAL PORTIONS OF SAID PISTON AND COMMUNICATING SAID FIRST WORK CHAMBER WITH SAID SECOND WORK CHAMBER, SAID PASSAGE MEANS INCLUDING SECOND VALVE MEANS OPERABLE IN SECOND WORK CHAMBER INCLUDING SECOND VALVE MEANS OPERABLE IN RESPONSE TO MOVEMENT OF SAID PISTON MEANS TO SAID SECOND END PORTION OF SAID CYLINDER AND DURING MOVEMENT OF SAID PISTON MEANS TO SAID FIRST END PORTION OF SAID CYLINDER FOR COMMUNICATING SAID FIRST AND SECOND WORK CHAMBERS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-16 | 1967-12-16 | 1968-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-16 | 1971-12-16 | 1972-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-16 | 1975-12-16 | 1976-06-16 | $7700.00 | Window Closed / Lapsed |