Patent US3253583A successfully refreshed from Google Patents.
US3253583A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary internal combustion engine
Assignee: Isuzu Motors Ltd
•
Filing: 1963-04-22
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Granted: 1966-05-31
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Expires: 1983-04-22
Abstract
No abstract record available.
Inventors
- 👤 Tsukagawa Satoru
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:47
CPC Classifications
F; F02; F02B; F02B53/00; F02B2053/005; F02B75/00; F02B75/02; F02B2075/022; F02B2075/027; F02B2730/00; F02B2730/01; F02B2730/018; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
AN INTERNAL COMBUSTION ENGINE COMPRISING AN INTERNAL ROTOR OF THE SHAPED OF A TWO LEAF EPITROCHOID, AN EXTERNAL ROTOR HAVING A THREE LEAF SHAPED SPACE TO RECEIVE THE LEAFS OF THE INTERNAL ROTOR, BEARING MEANS MOUNTING THE INTERNAL ROTOR FOR ROTATION IN THE EXTERNAL ROTOR, BEARING MEANS MOUNTING THE EXTERNAL ROTOR FOR ROTATION IN A FIXED FRAME, GEAR MEANS CONNECTING THE ROTORS FOR ROTATION IN THE RATIO OF 3:2, AND INLET AND EXHAUST PASSAGES IN ONE LEAF OF THE INTERNAL ROTOR LOCATED ON OPPOSITE SIDES OF A RADIAL LINE DRAWN FROM THE AXIS OF ROTATION THROUGH THE RADIAL OUTERMOST DIMENSION OF THE LEAF, SAID GEAR MEANS COMPRISING AN INTERNAL GEAR ON THE EXTERNAL ROTOR AND AN EXTERNAL GEAR ON THE INTERNAL ROTOR AND FURTHER INCLUDING AN
Claim 2
Dependent Claim
126 words
AN INTERNAL COMBUSTION ENGINE COMPRISING AN INTERNAL ROTOR OF THE SHAPED OF A TWO LEAF EPITROCHOID, AN EXTERNAL ROTOR HAVING A THREE LEAF SHAPED SPACE TO RECEIVE THE LEAFS OF THE INTERNAL ROTOR, BEARING MEANS MOUNTING THE INTERNAL ROTOR FOR ROTATION IN THE EXTERNAL ROTOR, BEARING MEANS MOUNTING THE EXTERNAL ROTOR FOR ROTATION IN A FIXED FRAME, GEAR MEANS CONNECTING THE ROTORS FOR ROTATION IN THE RATIO OF 3:2, AND INLET AND EXHAUST PASSAGES IN ONE LEAF OF THE INTERNAL ROTOR LOCATED ON OPPOSITE SIDES OF A RADIAL LINE DRAWN FROM THE AXIS OF ROTATION THROUGH THE RADIAL OUTERMOST DIMENSION OF THE LEAF, SAID GEAR MEANS COMPRISING AN INTERNAL GEAR ON THE EXTERNAL ROTOR AND AN EXTERNAL GEAR ON THE INTERNAL ROTOR AND FURTHER INCLUDING AN
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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) | 1969-05-30 | 1969-11-29 | 1970-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-30 | 1973-11-29 | 1974-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-30 | 1977-11-29 | 1978-05-31 | $7700.00 | Window Closed / Lapsed |