US4287861A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reciprocating internal-combustion engine
Assignee: Steyr Daimler Puch AG
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Filing: 1979-03-09
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Granted: 1981-09-08
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Expires: 1999-03-09
Abstract
Abstract In a reciprocating internal-combustion engine, a power unit comprises cylinders 1, cylinder heads 2, pistons, connecting rods, a crankshaft and crankshaft bearings. Soundproofing supporting members mount the ends of the power unit in an outer pan 7 which is connected to a flywheel housing 8. Soundproofing supporting members 12, 12a, 13 are coaxial with the crankshaft and center the power unit and hold it against substantial axial movement in the outer pan. An oil seal 14 is fitted between the power block and the top rim of the outer pan.
Inventors
- 👤 Kurt Lettner
- 👤 Eugen Egger
- 👤 Rudolf Unger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:30
CPC Classifications
F; F02; F02F; F02F7/00; F02F7/0065; F02F7/008
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
192 words
An internal combustion engine comprising (a) a power unit including a plurality of cylinders and associated cylinder heads, crankshaft bearings connected to the cylinders and a crankshaft rotatably mounted in the bearings, the crankshaft having two ends, (b) an outer pan having a bottom and an upper rim, the outer pan carrying the power unit and the power unit being mounted in the outer pan with a portion of the power unit protruding above the upper rim of outer pan, the protruding power unit portion and the upper rim defining a space therebetween, (c) a flywheel housing connected to the outer pan beyond one of the crankshaft ends, (d) annular soundproofing, load-bearing supporting members mounted coaxially about the crankshaft bearings near the ends of the crankshaft, the supporting members being arranged to support and center the power unit with respect to the outer pan and to hold the power unit against substantial axial movement in the outer pan, and (e) an oil seal mounted in the space between the protruding power unit portion and the outer pan upper rim for sealing in an oil-tight manner the power unit in the outer pan.
Claim 2
Dependent Claim
192 words
An internal combustion engine comprising (a) a power unit including a plurality of cylinders and associated cylinder heads, crankshaft bearings connected to the cylinders and a crankshaft rotatably mounted in the bearings, the crankshaft having two ends, (b) an outer pan having a bottom and an upper rim, the outer pan carrying the power unit and the power unit being mounted in the outer pan with a portion of the power unit protruding above the upper rim of outer pan, the protruding power unit portion and the upper rim defining a space therebetween, (c) a flywheel housing connected to the outer pan beyond one of the crankshaft ends, (d) annular soundproofing, load-bearing supporting members mounted coaxially about the crankshaft bearings near the ends of the crankshaft, the supporting members being arranged to support and center the power unit with respect to the outer pan and to hold the power unit against substantial axial movement in the outer pan, and (e) an oil seal mounted in the space between the protruding power unit portion and the outer pan upper rim for sealing in an oil-tight manner the power unit in the outer pan.
Claim 3
Dependent Claim
29 words
The internal combustion engine of claim 1, wherein the outer pan consists of two coaxial parts, the pan parts being separable along a plane extending transversely to the crankshaft.
Claim 4
Dependent Claim
42 words
The internal combustion engine of claim 1, further comprising an oil handling gear pump disposed radially inwardly of one of the supporting members, the gear pump including an internal gear and a housing fixed to the power unit and containing the gear.
Claim 5
Dependent Claim
50 words
The internal combustion engine of claim 1, wherein the cylinders and associated cylinder heads constitute a structural unit, the crankshaft bearing parts constituting a structural unit, the structural units are secured together by screw-means, the supporting members being secured to the structural unit constituted by the upper crankshaft bearing parts.
Claim 6
Dependent Claim
36 words
The internal combustion engine of claim 4, wherein the bottom of the outer pan defines openings wherethrough the screw means are accessible, and further comprising a bottom pan mounted on the bottom for covering the openings.
Claim 7
Dependent Claim
16 words
The internal combustion engine of claim 1, wherein the oil seal is an inflatable flexible tube.
Claim 8
Dependent Claim
43 words
The internal combustion engine of claim 6, wherein the protruding power unit portion and the upper rim have respective surfaces tightly engaged by the flexible tube, and the tube has buffer elements projecting into the outer pan and tapering downwardly from the tube.
Claim 9
Dependent Claim
26 words
The internal combustion engine of claim 7, wherein the respective surfaces define grooves and the flexible tube has bulges conforming to, the extending into, the grooves.
Claim 10
Dependent Claim
53 words
The internal combustion engine of claim 1, wherein the oil seal has a profiled top portion extending above the upper rim of the outer pan, and further comprising a hood disposed over the protruding power unit portion, the hood having a lower rim received in the profiled top portion of the oil seal.
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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) | 1984-09-07 | 1985-03-09 | 1985-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-07 | 1989-03-09 | 1989-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-07 | 1993-03-09 | 1993-09-08 | $7700.00 | Window Closed / Lapsed |