Patent US3175543A successfully refreshed from Google Patents.
US3175543A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air compressing piston internal combustion engine
Assignee: Andreas Stihl AG and Co KG
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Filing: 1962-08-15
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Granted: 1965-03-30
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Expires: 1982-08-15
Abstract
No abstract record available.
Inventors
- 👤 Drebes Armin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:54
CPC Classifications
F; F02; F02B; F02B23/00; F02B23/02; F02B23/06; F02B23/0618; F02B23/063; F02B19/00; F02B19/14; F02B23/04; F02B23/0675; F02B23/0696; F02F; F02F3/00; F02F3/28; F02B2275/00; F02B2275/14; F02B3/00; F02B3/06; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
179 words
AN AIR COMPRESSING INTERNAL COMBUSTION ENGINE, WHICH COMPRISES: A CYLINDER, A FIRST MEMBER IN THE FORM OF A CYLINDER HEAD MOUNTED ON SAID CYLINDER, A SECOND MEMBER IN THE FORM OF A PISTON RECIPROCABLY MOUNTED IN SAID CYLINDER AND HAVING A PISTON TOP FACING SAID CYLINDER HEAD AND IN THE UPPER DEAD CENTER POSITION OF SAID PISTON CONFINING A MINIMUM CHAMBER WITH THE ADJACENT SURFACE OF SAID CYLINDER HEAD, ONE OF SAID MEMBERS HAVING A COMBUSTION CHAMBER THEREIN OF APPROXIMATELY SPHERICAL CONTOUR AND WITH AN OPENING FACING THE OTHER ONE OF SAID MEMBERS SAID PISTON TOP HAVING A CIRCULAR AREA WHICH IS COAXIAL WITH SAID OPENING AND HAVING A DIAMETER OF ABOUT 1.4 TIMES THE DIAMETER OF SAID OPENING, ONE OF SAID PISTON TOP AND CYLINDER HEAD OUTWARDLY OF SAID AREA BEING SO FORMED THAT IN TOP DEAD CENTER POSITION OF THE PISTON THE DISTANCE BETWEEN SAID AREA OF SAID PISTON TOP AND THE DISTANCE BETWEEN SAID AREA OF SAID PISTON THE DISTANCE BETWEEN THE CYLINDER HEAD AND THE OTHER PISTON TOP AREA LOCATED RADIALLY OUTWARDLY OF SAID AREA.
Claim 2
Dependent Claim
179 words
AN AIR COMPRESSING INTERNAL COMBUSTION ENGINE, WHICH COMPRISES: A CYLINDER, A FIRST MEMBER IN THE FORM OF A CYLINDER HEAD MOUNTED ON SAID CYLINDER, A SECOND MEMBER IN THE FORM OF A PISTON RECIPROCABLY MOUNTED IN SAID CYLINDER AND HAVING A PISTON TOP FACING SAID CYLINDER HEAD AND IN THE UPPER DEAD CENTER POSITION OF SAID PISTON CONFINING A MINIMUM CHAMBER WITH THE ADJACENT SURFACE OF SAID CYLINDER HEAD, ONE OF SAID MEMBERS HAVING A COMBUSTION CHAMBER THEREIN OF APPROXIMATELY SPHERICAL CONTOUR AND WITH AN OPENING FACING THE OTHER ONE OF SAID MEMBERS SAID PISTON TOP HAVING A CIRCULAR AREA WHICH IS COAXIAL WITH SAID OPENING AND HAVING A DIAMETER OF ABOUT 1.4 TIMES THE DIAMETER OF SAID OPENING, ONE OF SAID PISTON TOP AND CYLINDER HEAD OUTWARDLY OF SAID AREA BEING SO FORMED THAT IN TOP DEAD CENTER POSITION OF THE PISTON THE DISTANCE BETWEEN SAID AREA OF SAID PISTON TOP AND THE DISTANCE BETWEEN SAID AREA OF SAID PISTON THE DISTANCE BETWEEN THE CYLINDER HEAD AND THE OTHER PISTON TOP AREA LOCATED RADIALLY OUTWARDLY OF SAID AREA.
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) | 1968-03-29 | 1968-09-28 | 1969-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-29 | 1972-09-28 | 1973-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-29 | 1976-09-28 | 1977-03-30 | $7700.00 | Window Closed / Lapsed |