US4569323A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil separator
Assignee: Aisin Corp
•
Filing: 1984-07-16
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Granted: 1986-02-11
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Expires: 2004-07-16
Abstract
Abstract An oil separator mounted on a cylinder head cover of an internal combustion engine to separate the lubricating oils within the blowby gases includes a buffer to intercept splashes of oil within the cylinder head cover, an inclined porous filter of foaming metal material positioned downstream of the buffer and an oil reservoir for depositing of the oil trapped by the filter.
Inventors
- 👤 Shuji Okumura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:52
CPC Classifications
F; F01; F01M; F01M13/00; F01M13/04; F01M13/0416; F01M13/0011; F01M2013/0438; F02; F02F; F02F7/00; F02F7/006
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
205 words
In an internal combustion engine including a cylinder head and a cover for each cylinder wherein the improvement comprises an oil separator having inlet and outlet ports and which is mounted on said cylinder head cover to separate and trap the lubricating oils within the blowby gases and which further comprises: a case mounted on said cylinder head cover, buffer means positioned near said inlet port and within said case to intercept splashes of the lubricating oils within said cylinder head cover, an inclined porous filter of foaming metal material inclined at an angle of 15°-90° with respect to a horizontal plane of said cylinder head case and positioned downstream of said buffer means in a direction of flow of said blowby gases, and an oil reservoir positioned at the lower end of said filter to reserve the oils trapped by said filter wherein said buffer means further comprises a first buffer having a first inclined buffer secured to said case so as to extend from the ceiling of said case and a second buffer formed on a bottom plate which is secured to a lower open portion of said case; and a second buffer positioned downstream of said filter and above said oil reservoir.
Claim 2
Dependent Claim
205 words
In an internal combustion engine including a cylinder head and a cover for each cylinder wherein the improvement comprises an oil separator having inlet and outlet ports and which is mounted on said cylinder head cover to separate and trap the lubricating oils within the blowby gases and which further comprises: a case mounted on said cylinder head cover, buffer means positioned near said inlet port and within said case to intercept splashes of the lubricating oils within said cylinder head cover, an inclined porous filter of foaming metal material inclined at an angle of 15°-90° with respect to a horizontal plane of said cylinder head case and positioned downstream of said buffer means in a direction of flow of said blowby gases, and an oil reservoir positioned at the lower end of said filter to reserve the oils trapped by said filter wherein said buffer means further comprises a first buffer having a first inclined buffer secured to said case so as to extend from the ceiling of said case and a second buffer formed on a bottom plate which is secured to a lower open portion of said case; and a second buffer positioned downstream of said filter and above said oil reservoir.
Claim 3
Dependent Claim
28 words
An oil separator as set forth in claim 1, further comprising a check valve to return the oils within said reservoir to an interior portion of the engine.
Claim 4
Dependent Claim
25 words
An oil separator as set forth in claim 2, wherein said check valve is positioned at a lower portion of said case defining said reservoir.
Claim 5
Dependent Claim
20 words
An oil separator as set forth in claim 1, wherein said filter is mounted on said first and second buffer.
Claim 6
Dependent Claim
17 words
An oil separator as set forth in claim 1, wherein said filter is mounted on said case.
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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) | 1989-02-10 | 1989-08-12 | 1990-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-02-10 | 1993-08-12 | 1994-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-02-10 | 1997-08-12 | 1998-02-11 | $7700.00 | Window Closed / Lapsed |