US3638760A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil tank for a rotary piston internal combustion engine with dry-sump lubrication
Assignee: Daimler Benz AG
•
Filing: 1970-03-31
•
Granted: 1972-02-01
•
Expires: 1990-03-31
Abstract
Abstract An oil tank for a rotary piston internal combustion engine, especially of trochoidal type of construction, with a dry sump lubrication for the drive unit and with a metered fresh oil lubrication for the piston cam surface in the housing casing; the oil tank for the dry sump lubrication includes inlet, outlet, venting and filler connections whereby a second tank for the fresh oil lubrication is arranged on the inside of the oil tank at a place substantially directly below the filler inlet and is in communication with the oil tank by way of an overflow while having its own outlet.
Inventors
- 👤 Heinz Lamm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 00:22
CPC Classifications
F; F01; F01M; F01M11/00; F01M11/06; F02; F02B; F02B53/00; F01M1/00; F01M1/12; F01M2001/126; F01M11/0004; F01M2011/0083; F02B2053/005; F02F; F02F7/00; F02F7/0085; F02F2007/0092; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
145 words
An oil tank structure for a rotary piston internal combustion engine which includes a housing with a casing forming a piston contact surface, a rotating piston in said housing, a dry-sump lubrication means for the drive unit of the internal combustion engine, a metered fresh oil lubrication means of the piston contact surface in the casing, and inlet, outlet venting and filler means for said oil tank structure, characterized by a first oil tank providing an oil supply for the lubrication means of the drive unit, and a second tank providing an oil supply of the fresh oil lubrication means arranged in the oil tank receiving the oil supply for the lubricating means of the drive unit, substantially directly below the filler means, said second tank being operatively connected with the first oil tank by way of overflow means and having a separate outlet means.
Claim 2
Dependent Claim
145 words
An oil tank structure for a rotary piston internal combustion engine which includes a housing with a casing forming a piston contact surface, a rotating piston in said housing, a dry-sump lubrication means for the drive unit of the internal combustion engine, a metered fresh oil lubrication means of the piston contact surface in the casing, and inlet, outlet venting and filler means for said oil tank structure, characterized by a first oil tank providing an oil supply for the lubrication means of the drive unit, and a second tank providing an oil supply of the fresh oil lubrication means arranged in the oil tank receiving the oil supply for the lubricating means of the drive unit, substantially directly below the filler means, said second tank being operatively connected with the first oil tank by way of overflow means and having a separate outlet means.
Claim 3
Dependent Claim
32 words
An oil tank structure according to claim 1, characterized in that the second tank is operatively connected with the oil supply in the first oil tank by way of a large surface.
Claim 4
Dependent Claim
48 words
An oil tank structure according to claim 2, characterized in that a runoff wall means is provided above the level of the oil supply below the inlet means of the oil in said first tank and in that said runoff wall means extends transversely through the oil tank.
Claim 5
Dependent Claim
23 words
AN oil tank structure according to claim 3, characterized in that the runoff wall means terminates closely in front of the second tank.
Claim 6
Dependent Claim
27 words
An oil tank structure according to claim 4, characterized in that the runoff wall means terminates closely in front of the second tank with a sharp edge.
Claim 7
Dependent Claim
42 words
An oil tank structure according to claim 3, characterized in that a protective wall means is arranged above the inlet means and below the vent means, the end of said protective wall means being disposed relatively close above the runoff wall means.
Claim 8
Dependent Claim
20 words
An oil tank structure according to claim 6, characterized in that said protective wall means is of substantially trapezoidal shape.
Claim 9
Dependent Claim
51 words
An oil tank structure according to claim 7, characterized in that the oil tank structure consists of substantially transparent synthetic resinous material provided with markings for the permissive minimum level of the oil in said first tank and of the oil for the fresh oil lubrication means in said second tank.
Claim 10
Dependent Claim
23 words
An oil tank structure according to claim 8, characterized in that the runoff wall means terminates closely in front of the second tank.
Claim 11
Dependent Claim
27 words
An oil tank structure according to claim 9, characterized in that the runoff wall means terminates closely in front of the second tank with a sharp edge.
Claim 12
Dependent Claim
62 words
An oil tank structure according to claim 10, characterized in that the dry-sump lubrication means is connected by way of its outlet means with the drive unit of a rotary piston internal combustion engine of trochoidal construction while the fresh oil lubrication means is connected with the contact surface in the casing of the engine housing by way of a metering pump.
Claim 13
Dependent Claim
48 words
An oil tank structure according to claim 1, characterized in that a runoff wall means is provided above the level of the oil supply below the inlet means of the oil in said first tank, and in that said runoff wall means extends transversely through the oil tank.
Claim 14
Dependent Claim
23 words
An oil tank structure according to claim 12, characterized in that the runoff wall means terminates closely in front of the second tank.
Claim 15
Dependent Claim
27 words
An oil tank structure according to claim 13, characterized in that the runoff wall means terminates closely in front of the second tank with a sharp edge.
Claim 16
Dependent Claim
42 words
An oil tank structure according to claim 13, characterized in that a protective wall means is arranged above the inlet means and below the vent means, the end of said protective wall means being disposed relatively close above the runoff wall means.
Claim 17
Dependent Claim
20 words
An oil tank structure according to claim 15, characterized in that said protective wall means is of substantially trapezoidal shape.
Claim 18
Dependent Claim
51 words
An oil tank structure according to claim 1, characterized in that the oil tank structure consists of substantially transparent synthetic resinous material provided with markings for the permissive minimum level of the oil in said first tank and of the oil for the fresh oil lubrication means in the second tank.
Claim 19
Dependent Claim
62 words
An oil tank structure according to claim 1, characterized in that the dry-sump lubrication means is connected by way of its outlet means with the drive unit of a rotary piston internal combustion engine of trochoidal construction while the fresh oil lubrication means is connected with the contact surface in the casing of the engine housing by way of a metering pump.
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) | 1975-01-31 | 1975-08-02 | 1976-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-31 | 1979-08-02 | 1980-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-31 | 1983-08-02 | 1984-02-01 | $7700.00 | Window Closed / Lapsed |