US3924863A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gasket
Assignee: Honda Motor Co Ltd
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Filing: 1974-12-10
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Granted: 1975-12-09
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Expires: 1994-12-10
Abstract
Abstract A gasket is provided for use between a relatively cool cylinder head of an internal combustion engine and a relatively hot manifold receiving hot exhaust gases from the engine. The gasket is constructed of three plates: the center plate is formed of insulation material such as asbestos, one side plate being formed of copper or aluminum or other metal having a relatively high coefficient of thermal expansion, and the other side plate being formed of steel or stainless steel or other metal having a relatively low coefficient. The side plate with the high coefficient is placed against the engine head, and the side plate with the low coefficient is placed against the manifold, to prevent undesirable differential expansion of the side plates leading to gas leakage between the plates.
Inventors
- 👤 Soichi Nakano
- 👤 Yoshitoku Iizuka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 01:12
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/02; F16J15/06; F16J15/10; F16J15/12; F16J15/121; F16J15/122; F16J15/123; F02; F02B; F02B19/00; F02B19/10; F02F; F02F11/00; F02F11/002; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y10; Y10S; Y10S277/00; Y10S277/935; Y10S277/939; Y10S277/941
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
96 words
A gasket for an internal combustion piston engine having confronting relatively hot and cold contact surfaces comprising, in combination: A first plate formed of insulated material, a second plate formed of metal having a relatively high coefficient of termal expansion, a third plate formed of metal having a relatively low coefficient of thermal expansion, said first plate being positioned between said second and third plates, said second plate being adapted to contact the relatively cold contact surface of the engine and said third plate being adapted to contact the relatively hot contact surface of the engine.
Claim 2
Dependent Claim
96 words
A gasket for an internal combustion piston engine having confronting relatively hot and cold contact surfaces comprising, in combination: A first plate formed of insulated material, a second plate formed of metal having a relatively high coefficient of termal expansion, a third plate formed of metal having a relatively low coefficient of thermal expansion, said first plate being positioned between said second and third plates, said second plate being adapted to contact the relatively cold contact surface of the engine and said third plate being adapted to contact the relatively hot contact surface of the engine.
Claim 3
Dependent Claim
39 words
The combination set forth in claim 1 in which the cold surface is formed on a cylinder head of the engine and the hot surface is formed on a manifold through which hot exhaust gases pass from the engine.
Claim 4
Dependent Claim
144 words
In a gasket for use between the cylinder head and the manifold assembly of an internal combustion piston engine, the manifold assembly including passages for hot exhaust gases from the engine and leading to a reactor chamber for oxidizing unburned hydrocarbons, the gasket comprising, in combination: a first plate formed of insulation material, a second plate formed of metal having a relatively high coefficient of thermal expansion, a third plate formed of metal having a relatively low coefficient of thermal expansion, said first plate being positioned between said second and third plates, said second plate being adapted to contact the relatively cool engine head, and said third plate being adapted to contact the relatively hot manifold assembly, and all plates of the gasket having aligned holes through which hot exhaust gases may pass from the engine head to the manifold assembly and reactor chamber.
Claim 5
Dependent Claim
144 words
In a gasket for use between the cylinder head and the manifold assembly of an internal combustion piston engine, the manifold assembly including passages for hot exhaust gases from the engine and leading to a reactor chamber for oxidizing unburned hydrocarbons, the gasket comprising, in combination: a first plate formed of insulation material, a second plate formed of metal having a relatively high coefficient of thermal expansion, a third plate formed of metal having a relatively low coefficient of thermal expansion, said first plate being positioned between said second and third plates, said second plate being adapted to contact the relatively cool engine head, and said third plate being adapted to contact the relatively hot manifold assembly, and all plates of the gasket having aligned holes through which hot exhaust gases may pass from the engine head to the manifold assembly and reactor chamber.
Claim 6
Dependent Claim
16 words
The combination set forth in claim 3 in which said second plate is formed of copper.
Claim 7
Dependent Claim
16 words
The combination set forth in claim 3 in which said second plate is formed of aluminum.
Claim 8
Dependent Claim
16 words
The combination set forth in claim 3 in which said third plate is formed of steel.
Claim 9
Dependent Claim
17 words
The combination set forth in claim 3 in which said third plate is formed of stainless steel.
Claim 10
Dependent Claim
25 words
The combination set forth in claim 3 in which said second plate is formed of copper and said third plate is formed of stainless steel.
Claim 11
Dependent Claim
133 words
In a gasket for use betWeen the cylinder head and the manifold assembly of an internal combustion piston engine, the manifold assembly including intake passages and including exhaust passages leading to a reactor chamber for oxidizing unburned hydrocarbons, the gasket comprising, in combination: a first plate formed of insulation material, a second plate formed of metal having a relatively high coefficient of thermal expansion, a third plate formed of metal having a relatively low coefficient of thermal expansion, said first plate being positioned between said second and third plates, said second plate being adapted to contact the relatively cool engine head, and said third plate being adapted to contact the relatively hot manifold assembly, and the plates of the gasket having aligned holes through which the intake mixtures and exhaust gases may pass.
Claim 12
Dependent Claim
133 words
In a gasket for use betWeen the cylinder head and the manifold assembly of an internal combustion piston engine, the manifold assembly including intake passages and including exhaust passages leading to a reactor chamber for oxidizing unburned hydrocarbons, the gasket comprising, in combination: a first plate formed of insulation material, a second plate formed of metal having a relatively high coefficient of thermal expansion, a third plate formed of metal having a relatively low coefficient of thermal expansion, said first plate being positioned between said second and third plates, said second plate being adapted to contact the relatively cool engine head, and said third plate being adapted to contact the relatively hot manifold assembly, and the plates of the gasket having aligned holes through which the intake mixtures and exhaust gases may pass.
Claim 13
Dependent Claim
48 words
The combination set forth in claim 9 in which said holes for the intake mixtures contain grommets made of material having a relatively high coefficient of thermal expansion, and the holes for the exhaust gases contain grommets made from material having a relatively low coefficient of thermal expansiom.
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) | 1978-12-08 | 1979-06-09 | 1979-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-08 | 1983-06-09 | 1983-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-08 | 1987-06-09 | 1987-12-09 | $7700.00 | Window Closed / Lapsed |