US4597372A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil separator for blowby gas
Assignee: Toyota Motor Corp
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Filing: 1985-07-10
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Granted: 1986-07-01
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Expires: 2005-07-10
Abstract
Abstract The invention relates to an oil separator for blowby gas having a baffle with a side wall and a bottom wall. A cut piece is bent from the bottom wall. A shut-off member is attached to the side wall and has a first wall located at a spaced distance from and opposed to the bottom end of the cut piece. The bottom end of the first wall is located between a first line extending from the bottom end of the cut piece and perpendicular to the first wall, and an intersection point defined at the intersection of an extension of the cut piece and an extension of the first wall. According to the inventive structure, the oil drops splashed by the rotating cam and reflected from a side wall of a cylinder head cover toward the baffle are effectively prevented from entering the baffle.
Inventors
- 👤 Yasuharu Furukawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:38
CPC Classifications
F; F01; F01M; F01M11/00; F01M13/00; F01M13/04; F01M13/0416; F02; F02M; F02M25/00; F02M25/06; F02B; F02B2275/00; F02B2275/34; F02F; F02F7/00; F02F7/006; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
199 words
An oil separator for blowby gas in a multi-cylinder internal combustion engine having rotating cams, the oil separator comprising: a baffle having a side wall and a bottom wall which extends from a lower edge of said side wall, a cut piece bent away from said bottom wall to form a hole in said bottom wall, said cut piece including one side connected to said bottom wall a slanting portion and an opposide side opposed to said one side and comprising an edge, said cut piece slanting toward a side wall of a cylinder head cover, a gap formed between a periphery of the hole formed in said bottom wall and the edge of said cut piece constituting a blowby gas suction port; and an oil shut-off member attached to said baffle and having a first wall located at a spaced distance from and opposed to said edge of the cut piece of said baffle, a bottom end of said first wall being located between a first line extending from said edge of said cut piece and perpendicular to said first wall, and an intersection of an extension of said cut piece and an extension of said first wall.
Claim 2
Dependent Claim
199 words
An oil separator for blowby gas in a multi-cylinder internal combustion engine having rotating cams, the oil separator comprising: a baffle having a side wall and a bottom wall which extends from a lower edge of said side wall, a cut piece bent away from said bottom wall to form a hole in said bottom wall, said cut piece including one side connected to said bottom wall a slanting portion and an opposide side opposed to said one side and comprising an edge, said cut piece slanting toward a side wall of a cylinder head cover, a gap formed between a periphery of the hole formed in said bottom wall and the edge of said cut piece constituting a blowby gas suction port; and an oil shut-off member attached to said baffle and having a first wall located at a spaced distance from and opposed to said edge of the cut piece of said baffle, a bottom end of said first wall being located between a first line extending from said edge of said cut piece and perpendicular to said first wall, and an intersection of an extension of said cut piece and an extension of said first wall.
Claim 3
Dependent Claim
26 words
The oil separator for blowby gas of claim 1, wherein said baffle is located above said cylinders, and said bottom wall slants downward toward said cylinders.
Claim 4
Dependent Claim
42 words
The oil separator for blowby gas of claim 1, wherein the bottom wall of said baffle includes a lip extending between the periphery of the hole opposed to said edge of said cut piece, and the bottom end of the side wall.
Claim 5
Dependent Claim
49 words
The oil separator for blowby gas of claim 1, wherein said first wall of said oil shut-off member extends downward substantially in the vertical direction, said first wall being secured to a surface of the side wall of the baffle facing the side wall of the cylinder head cover.
Claim 6
Dependent Claim
94 words
The oil separator for blowby gas of claim 1 wherein said cut piece has a pair of lateral connecting sides which connect said one side and said edge of said cut piece, and said oil shut-off member has a pair of second walls generally parallel to said lateral sides of said cut piece, each of said second walls having a first end connected to said first wall, bottom ends of said second walls extending to the same level as the bottom end of said first wall at the first end of the second walls.
Claim 7
Dependent Claim
38 words
The oil separator for blowby gas of claim 4, wherein each second wall has a second end opposite the first end, each second end of said second wall being cut away to prevent interference with a rotating cam.
Claim 8
Dependent Claim
38 words
The oil separator for blowby gas of claim 5, wherein a gap is provided between said second walls of said oil shut-off member and said connecting sides of said cut piece, the blowby gas flowing through said gap.
Claim 9
Dependent Claim
21 words
The oil separator for blowby gas of claim 1, wherein said oil shut-off member is fixed to said baffle by spotwelds.
Claim 10
Dependent Claim
25 words
The oil separator for blowby gas of claim 1, wherein baffles are provided for the cams for the two central cylinders in a multi-cylinder engine.
Claim 11
Dependent Claim
46 words
The oil separator for blowby gas of claim 9, wherein holes are provided in the bottom wall of said baffle corresponding to said two central cylinders and an oil shut-off member is provided corresponding to each of said holes in the bottom wall of said baffle.
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) | 1989-06-30 | 1989-12-30 | 1990-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-30 | 1993-12-30 | 1994-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-30 | 1997-12-30 | 1998-07-01 | $7700.00 | Window Closed / Lapsed |