US3687231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal combustion engine for oil testing
Assignee: Individual
•
Filing: 1971-01-22
•
Granted: 1972-08-29
•
Expires: 1991-01-22
Abstract
Abstract An internal combustion engine for oil testing, comprising two separate lubricating circles, the first of which is supplied with the oil to be tested, and the second with ordinary lubricating oil, each of the lubricating circles being associated with a separate oil chamber in the crankshaft housing, said oil chambers being separated from each other by means of a partition of the crankshaft housing providing an oil-tight seal.
Inventors
- 👤 Andreas Scheiterlein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:07
CPC Classifications
F; F01; F01M; F01M11/00; F01M1/00; F01M9/00; F01M9/10
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
210 words
An internal combustion engine for oil testing, comprising a crankcase, a crankshaft extending through and carried in said crankcase, gear members located in the said crankcase, a cylinder block mounted on the said crankcase, at least one piston slidably guided in said cylinder block, lubricating points of said crankshaft, of said gear members and of said piston provided in the said crankcase and said cylinder block, a lubricating system for the feeding of the said lubricating points, consisting of a first lubricating circle comprising mechanically and thermally highly loaded lubricating points, oil to be tested circulating in the said first lubricating circle, a second lubricating circle arranged in spaced relation to said first lubricating circle and comprising the remaining lubricating points of the engine, normal lubricating oil circulating in said second lubricating circle, an oil-wetted inner space in said crankcase and said cylinder block, a partition arranged in the said oil-wetted inner space and subdividing the same into two separate oil chambers sealed off against each other, the first of said oil chambers including the lubricating points of the first lubricating circle supplied with the oil to be tested, the second of said oil chambers including the remaining lubricating points of the second lubricating circle supplied with ordinary lubricating oil.
Claim 2
Dependent Claim
210 words
An internal combustion engine for oil testing, comprising a crankcase, a crankshaft extending through and carried in said crankcase, gear members located in the said crankcase, a cylinder block mounted on the said crankcase, at least one piston slidably guided in said cylinder block, lubricating points of said crankshaft, of said gear members and of said piston provided in the said crankcase and said cylinder block, a lubricating system for the feeding of the said lubricating points, consisting of a first lubricating circle comprising mechanically and thermally highly loaded lubricating points, oil to be tested circulating in the said first lubricating circle, a second lubricating circle arranged in spaced relation to said first lubricating circle and comprising the remaining lubricating points of the engine, normal lubricating oil circulating in said second lubricating circle, an oil-wetted inner space in said crankcase and said cylinder block, a partition arranged in the said oil-wetted inner space and subdividing the same into two separate oil chambers sealed off against each other, the first of said oil chambers including the lubricating points of the first lubricating circle supplied with the oil to be tested, the second of said oil chambers including the remaining lubricating points of the second lubricating circle supplied with ordinary lubricating oil.
Claim 3
Dependent Claim
65 words
An internal combustion engine for oil testing according to claim 1, further comprising passages for said gear members from said first oil chamber to said second oil chamber, a gasket each located at one of said passages and sealing said two oil chambers off against each other at these passages, said partition being arranged in said crankcase and designed as a crosswall of said crankcase.
Claim 4
Dependent Claim
26 words
An internal combustion engine for oil testing according to claim 2, wherein the said partition of the crankcase is inclined in relation to a horizontal plane.
Claim 5
Dependent Claim
40 words
An internal combustion engine for oil testing according to claim 2, wherein an aperture is provided in the said partition of the crankcase, a removable cover being insertable in the said aperture of the partition and closing the same tightly.
Claim 6
Dependent Claim
46 words
An internal combustion engine for oil testing according to claim 2, comprising two crankshaft bearings connected with the first-mentioned lubricating circle impinged upon by the test oil, a sealing ring being provided around the crankshaft at the inner extremity of each of the said crankshaft bearings.
Claim 7
Dependent Claim
46 words
An internal combustion engine for oil testing according to claim 2, comprising two crankshaft bearings connected with the second lubricating circle impinged upon by ordinary lubricant, a sealing ring each being provided around the crankshaft at the outer extremity of each of the said crankshaft bearings.
Claim 8
Dependent Claim
84 words
An internal combustion engine for oil testing according to claim 1, further comprising a spacer inserted between said crankcase and said cylinder block, a crosswall arranged in the said spacer and defining said partition separating said first oil chamber including lubricating points impinged upon by the oil to be tested and pertaining to the cylinder block from said second oil chamber including lubricating points located beneath said spacer and supplied with ordinary lubricating oil, in such a manner as to provide an oil-tight seal.
Claim 9
Dependent Claim
123 words
An internal combustion engine for oil testing according to claim 7, comprising a crosshead shoe slidably guided in the said spacer, a bearing bolt arranged in transverse relation in the said crosshead shoe, a connecting rod, an upper extremity of which is hinged on the said bearing bolt, a lower extremity of the connecting rod being hinged on the crankshaft of the engine, a push rod hinged to the said bearing bolt and extending through the said crosswall of the spacer, an upper extremity of the said push rod being hinged to the piston of the engine, a stuffing-box inserted in the said crosswall of the spacer and tightly encompassing the said push rod at the point where it extends through the crosswall.
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) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |