Patent US3241531A successfully refreshed from Google Patents.
US3241531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary piston engine
Assignee: Individual
•
Filing: 1962-10-12
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Granted: 1966-03-22
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Expires: 1982-10-12
Abstract
No abstract record available.
Inventors
- 👤 Bancroft Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:45
CPC Classifications
F; F02; F02B; F02B53/00; F02B2730/00; F02B2730/03; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
183 words
A ROTARY PISTON FLUID DISPLACEMENT DEVICE COMPRISING A STATOR ASSEMBLY HAVING AN ANNULAR CHAMBER, A PLURALITY OF ROTARY PISTON ASSEMBLIES OF THE ANGULAR ACCELERATING AND DECELERATING TYPE MOVABLE ALONG A COMMON PATH OF TRAVEL WITHIN SAID CHAMBER ABOUT THE CENTRAL AXIS THEREOF, EACH OF SAID ASSEMBLIES INCLUDING A TUBULAR SUPPORT MEMBER AND A PLURALITY OF PISTONS MOUNTED UPON SAID TUBULAR SUPPORT MEMBER AND EXTENDING THEREFROM INTO SAID CHAMBER, EACH PISTON OF EACH OF SAID PLURALITY OF PISTON ASSEMBLIES FACING AT LEAST ONE PISTON OF A DIFFERENT PISTON ASSEMBLY, MEANS FOR ADMITTING FLUID INTO SAID CHAMBER, MEANS FOR RELEASING FLUID FROM SAID CHAMBER, A CRANKSHAFT ASSEMBLY CONSISTING OF A PAIR OF SEPARATE SHAFTS SPACED APART FROM ONE ANOTHER ALONG THE AXIS OF ROTATION OF SAID CRANKSHAFT ASSEMBLY WHICH EXTENDS ALONG THE CENTRAL AXIS OF SAID CHAMBER, SAID SHAFTS BEING DISPOSED FOR ROTATION ABOUT SAID CENTRAL AXIS, A PAIR OF ROTARY CONNECTING MEMBERS EACH HAVING A CENTRAL AXIS OF ROTATION AND EACH BEING PROVIDED WITH AN ECCENTRIC PIVOTAL CONNECTION OF ITS CENTRAL AXIS WITH A DIFFERENT ONE OF SAID SHAFTS, THE CENTRAL AXIS OF EACH
Claim 2
Dependent Claim
183 words
A ROTARY PISTON FLUID DISPLACEMENT DEVICE COMPRISING A STATOR ASSEMBLY HAVING AN ANNULAR CHAMBER, A PLURALITY OF ROTARY PISTON ASSEMBLIES OF THE ANGULAR ACCELERATING AND DECELERATING TYPE MOVABLE ALONG A COMMON PATH OF TRAVEL WITHIN SAID CHAMBER ABOUT THE CENTRAL AXIS THEREOF, EACH OF SAID ASSEMBLIES INCLUDING A TUBULAR SUPPORT MEMBER AND A PLURALITY OF PISTONS MOUNTED UPON SAID TUBULAR SUPPORT MEMBER AND EXTENDING THEREFROM INTO SAID CHAMBER, EACH PISTON OF EACH OF SAID PLURALITY OF PISTON ASSEMBLIES FACING AT LEAST ONE PISTON OF A DIFFERENT PISTON ASSEMBLY, MEANS FOR ADMITTING FLUID INTO SAID CHAMBER, MEANS FOR RELEASING FLUID FROM SAID CHAMBER, A CRANKSHAFT ASSEMBLY CONSISTING OF A PAIR OF SEPARATE SHAFTS SPACED APART FROM ONE ANOTHER ALONG THE AXIS OF ROTATION OF SAID CRANKSHAFT ASSEMBLY WHICH EXTENDS ALONG THE CENTRAL AXIS OF SAID CHAMBER, SAID SHAFTS BEING DISPOSED FOR ROTATION ABOUT SAID CENTRAL AXIS, A PAIR OF ROTARY CONNECTING MEMBERS EACH HAVING A CENTRAL AXIS OF ROTATION AND EACH BEING PROVIDED WITH AN ECCENTRIC PIVOTAL CONNECTION OF ITS CENTRAL AXIS WITH A DIFFERENT ONE OF SAID SHAFTS, THE CENTRAL AXIS OF EACH
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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) | 1969-03-21 | 1969-09-20 | 1970-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-21 | 1973-09-20 | 1974-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-21 | 1977-09-20 | 1978-03-22 | $7700.00 | Window Closed / Lapsed |