US3824973A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cylinder head oil drain system
Assignee: Motors Liquidation Co
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Filing: 1973-06-01
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Granted: 1974-07-23
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Expires: 1993-06-01
Abstract
Abstract An oil drain system for an overhead camshaft internal combustion engine includes a jet pump nozzle having an intake end in communication with the main oil gallery of the cylinder head and a nozzle end operative to direct a stream of oil under pressure into a cylinder head drain passage, whereby the drain flow of oil from the cylinder head to the engine crank case is improved.
Inventors
- 👤 V Harhaus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:00
CPC Classifications
F; F01; F01M; F01M11/00; F01M11/04; F01M11/02; F01M9/00; F01M9/10; F01M2011/023; F02; F02B; F02B2275/00; F02B2275/20
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
159 words
In an oil supply system for an internal combustion engine, the internal combustion engine including a cylinder head, a main oil gallery in the cylinder head for supplying oil therein, a floor in the cylinder head for the collection of oil therein, an oil sump below the cylinder head, pump and conduit means for supplying oil under pressure from the oil sump to the main oil gallery, one or more oil drain passages in the cylinder head having an upper end terminating at the cylinder head floor and a lower end in communication with the oil sump, the improvement comprising: jet pump means provided in the cylinder head including jet nozzle means having an intake end in communication with the main oil gallery and a nozzle end operative to direct a flow of oil under pressure into one of the drain passages whereby the drainage of oil from the cylinder head floor through the one drain passage is enhanced.
Claim 2
Dependent Claim
159 words
In an oil supply system for an internal combustion engine, the internal combustion engine including a cylinder head, a main oil gallery in the cylinder head for supplying oil therein, a floor in the cylinder head for the collection of oil therein, an oil sump below the cylinder head, pump and conduit means for supplying oil under pressure from the oil sump to the main oil gallery, one or more oil drain passages in the cylinder head having an upper end terminating at the cylinder head floor and a lower end in communication with the oil sump, the improvement comprising: jet pump means provided in the cylinder head including jet nozzle means having an intake end in communication with the main oil gallery and a nozzle end operative to direct a flow of oil under pressure into one of the drain passages whereby the drainage of oil from the cylinder head floor through the one drain passage is enhanced.
Claim 3
Dependent Claim
43 words
The improvement of claim 1 wherein the jet conduit means is a nozzle having an enlarged diameter intake end retained within the main oil gallery and a nozzle end aligned to direct a stream of oil under pressure into the one drain passage.
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) | 1977-07-22 | 1978-01-21 | 1978-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-22 | 1982-01-21 | 1982-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-22 | 1986-01-21 | 1986-07-23 | $7700.00 | Window Closed / Lapsed |