US3738331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary piston internal combustion engine with externally controlled ignition by means of a spark plug
Assignee: Daimler Benz AG
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Filing: 1971-04-26
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Granted: 1973-06-12
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Expires: 1991-04-26
Abstract
Abstract A rotary piston internal combustion engine with applied ignition by means of a spark plug within an ignition pre-chamber, especially of trochoidal construction, which essentially consists of a casing housing and of a polygonal piston rotating within the same which slides along a multi-arched inner casing running surface and over the orifice of a firing channel whereby a straight line extending in a cross-direction to the casing housing intersects both the center longitudinal axis of the spark plug as also the center longitudinal axis of the firing channel in the ignition pre-chamber in front of the center electrode of the spark plug.
Inventors
- 👤 E Braun
- 👤 W Brodbeck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:28
CPC Classifications
F; F02; F02B; F02B53/00; F02B53/12; F02B1/00; F02B1/02; F02B1/04; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
150 words
A rotary piston internal combustion engine with externally applied ignition by a spark plug means in an ignition prechamber, which includes a casing housing means and a polygonal piston means rotating within the casing housing means, said piston means sliding along a multi-arched inner-casing contact surface means and over the discharge orifice of a firing channel means, and said spark plug means including a center electrode, characterized in that the longitudinal axes of said spark plug means and of said firing channel means are disposed non-parallel to one another, and in that a straight line extending perpendicularly to the center longitudinal planes of the spark plug means and of the firing channel means intersects both the center longitudinal axis of the spark plug means as also the center longitudinal axis of the firing channel means in the ignition pre-chamber in front of the center electrode of the spark plug means.
Claim 2
Dependent Claim
150 words
A rotary piston internal combustion engine with externally applied ignition by a spark plug means in an ignition prechamber, which includes a casing housing means and a polygonal piston means rotating within the casing housing means, said piston means sliding along a multi-arched inner-casing contact surface means and over the discharge orifice of a firing channel means, and said spark plug means including a center electrode, characterized in that the longitudinal axes of said spark plug means and of said firing channel means are disposed non-parallel to one another, and in that a straight line extending perpendicularly to the center longitudinal planes of the spark plug means and of the firing channel means intersects both the center longitudinal axis of the spark plug means as also the center longitudinal axis of the firing channel means in the ignition pre-chamber in front of the center electrode of the spark plug means.
Claim 3
Dependent Claim
36 words
A rotary piston internal combustion engine according to claim 1, characterized in that the firing channel means arranged in the casing housing means has an angle of about 65* in the axial direction of the engine.
Claim 4
Dependent Claim
43 words
A rotary piston internal combustion engine according to claim 2, characterized in that the center longitudinal axes of the spark plug means and of the firing channel means, as viewed in cross-direction to the casing housing means, subtend an angle of about 130*.
Claim 5
Dependent Claim
19 words
A rotary piston internal combustion engine according to claim 3, characterized in that the engine is of trochoidal construction.
Claim 6
Dependent Claim
43 words
A rotary piston internal combustion engine according to claim 1, characterized in that the center longitudinal axes of the spark plug means and of the firing channel means, as viewed in cross-direction to the casing housing means, subtend an angle of about 130*.
Claim 7
Dependent Claim
19 words
A rotary piston internal combustion engine according to claim 1, characterized in that the engine is of trochoidal construction.
Claim 8
Dependent Claim
24 words
A rotary piston internal combustion engine according to claim 3, characterized in that the spark plug means projects laterally into the casing housing means.
Claim 9
Dependent Claim
24 words
A rotary piston internal combustion engine according to claim 1, characterized in that the spark plug means projects laterally into the casing housing means.
Claim 10
Dependent Claim
52 words
A rotary piston internal combustion engine according to claim 8, in which the housing casing means is adjoined laterally by lateral housing means, said spark plug means projecting laterally into said housing casing means generally in the axial direction of the engine through an aperture provided in a respective lateral housing means.
Claim 11
Dependent Claim
167 words
A rotary piston internal combustion engine with externally applied ignition by a spark plug means in an ignition pre-chamber, which comprises a housing means including a housing casing and lateral housing means, a polygonal piston means rotating within said housing casing means and sliding along a multi-arched inner-casing running surface means of the casing means over the discharge orifice of a firing channel means, and said spark plug means including a center electrode, characterized in that said spark plug means projects laterally into the housing casing means through a respective lateral housing means, and in that a straight line extending substantially perpendicularly to the center longitudinal planes of the spark plug means and of the firing channel means intersects both the center longitudinal axis of the spark plug means as also the center longitudinal axis of the firing channel means in the ignition pre-chamber in front of the center electrode of the spark plug means, and said two longitudinal axes being non-coincidental with respect to one another.
Claim 12
Dependent Claim
167 words
A rotary piston internal combustion engine with externally applied ignition by a spark plug means in an ignition pre-chamber, which comprises a housing means including a housing casing and lateral housing means, a polygonal piston means rotating within said housing casing means and sliding along a multi-arched inner-casing running surface means of the casing means over the discharge orifice of a firing channel means, and said spark plug means including a center electrode, characterized in that said spark plug means projects laterally into the housing casing means through a respective lateral housing means, and in that a straight line extending substantially perpendicularly to the center longitudinal planes of the spark plug means and of the firing channel means intersects both the center longitudinal axis of the spark plug means as also the center longitudinal axis of the firing channel means in the ignition pre-chamber in front of the center electrode of the spark plug means, and said two longitudinal axes being non-coincidental with respect to one another.
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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) | 1976-06-11 | 1976-12-11 | 1977-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-11 | 1980-12-11 | 1981-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-11 | 1984-12-11 | 1985-06-12 | $7700.00 | Window Closed / Lapsed |