Patent US4335890A successfully refreshed from Google Patents.
US4335890A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gasket for cylinder head
Assignee: Individual
•
Filing: 1980-03-25
•
Granted: 1982-06-22
•
Expires: 2000-03-25
Abstract
Abstract A gasket for sealing the joint between the cylinder block and the cylinder head of wet liner internal combustion engine formed a pair of outer metal plates, and a composite metal spacer plate disposed between the two outer plates. Incorporated between the outer metal plates and around each cylinder bore opening is a washer having on each face circumferential serrations of V-shaped profile.
Inventors
- 👤 Terence P. Nicholson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:27
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/02; F16J15/06; F16J15/08; F16J15/0818; F16J15/0825; F16J2015/085
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
139 words
A gasket for sealing the joint between the cylinder block and the cylinder head of a wet liner internal combustion engine comprising a pair of outer metal plates, a composite metal spacer plate disposed between the two outer plates, and a sealing washer disposed between the two outer plates around each cylinder bore opening, said sealing washer formed on each axial face with circumferential serrations of V-shaped profile, the thickness of the washer measured over the peaks of the serrations being somewhat greater than that of the composite spacer plate whereas the thickness measured between the troughs of the serrations is significantly less than that of the composite spacer plate, said sealing washer being deformable under the clamping pressure of said plates so that the material in the peaks of the serrations flow into the troughs of the serrations.
Claim 2
Dependent Claim
139 words
A gasket for sealing the joint between the cylinder block and the cylinder head of a wet liner internal combustion engine comprising a pair of outer metal plates, a composite metal spacer plate disposed between the two outer plates, and a sealing washer disposed between the two outer plates around each cylinder bore opening, said sealing washer formed on each axial face with circumferential serrations of V-shaped profile, the thickness of the washer measured over the peaks of the serrations being somewhat greater than that of the composite spacer plate whereas the thickness measured between the troughs of the serrations is significantly less than that of the composite spacer plate, said sealing washer being deformable under the clamping pressure of said plates so that the material in the peaks of the serrations flow into the troughs of the serrations.
Claim 3
Dependent Claim
38 words
The gasket according to claim 1, wherein said outer metal plates have outwardly directed corrugations formed therein away from the cylinder bore openings and the spacer plate comprises a central soft metal layer and hard metal surface layers.
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) | 1985-06-21 | 1985-12-21 | 1986-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-21 | 1989-12-21 | 1990-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-21 | 1993-12-21 | 1994-06-22 | $7700.00 | Window Closed / Lapsed |