Patent US4465287A successfully refreshed from Google Patents.
US4465287A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cylinder-head gasket for piston-type internal combustion engines
Assignee: Elring Dichtungswerke GmbH
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Filing: 1983-05-04
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Granted: 1984-08-14
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Expires: 2003-05-04
Abstract
Abstract In a cylinder-head gasket defining a sealing plane, and including at least a soft sheet of material made of a highly elastic layer of graphite, and formed with an opening serving as a fuel chamber passage, and wherein a sheet metal collar covers a rim of the layer bordering said opening, the improvement includes the sheet metal collar forming a single flange extending for the greater part thereof parallel to the sealing plane, and terminating near the edge of the said rim facing away from the said sealing plane.
Inventors
- 👤 Rudolf Bindel
- 👤 Wilhelm Kullen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:07
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/02; F16J15/06; F16J15/10; F16J15/12; F16J15/121; F16J15/122; F16J15/123; F05; F05C; F05C2203/00; F05C2203/08; F05C2203/0804; F05C2203/0808
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
81 words
A cylinder-head gasket defining a sealing plane, comprising in combination at least a soft sheet of material made of a highly elastic layer of graphite, and formed with an opening serving as a fuel chamber passage, a sheet metal collar clamp extending along a rim of said layer bordering said opening, and including a single flange extending for the greater part thereof parallel to said sealing plane, and terminating near an edge of said rim facing away from said sealing plane.
Claim 2
Dependent Claim
81 words
A cylinder-head gasket defining a sealing plane, comprising in combination at least a soft sheet of material made of a highly elastic layer of graphite, and formed with an opening serving as a fuel chamber passage, a sheet metal collar clamp extending along a rim of said layer bordering said opening, and including a single flange extending for the greater part thereof parallel to said sealing plane, and terminating near an edge of said rim facing away from said sealing plane.
Claim 3
Dependent Claim
47 words
The cylinder-head gasket as claimed in claim 1, wherein the cross-section of said sheet metal collar clamp is substantially L-shaped, the portion of said metal sheet collar clamp covering the rim of said layer bordering said opening being convex as viewed from the center of said opening.
Claim 4
Dependent Claim
35 words
The cylinder-head gasket as claimed in claim 1, wherein the cross-section of said sheet metal collar clamp is substantially L-shaped, two wings thereof forming substantially a right angle subtending a relatively small transition radius therebetween.
Claim 5
Dependent Claim
27 words
The cylinder-head gasket as claimed in claim 1, wherein said sheet metal collar clamp includes lugs overlapping an edge of said rim of said layer of graphite.
Claim 6
Dependent Claim
44 words
The cylinder-head gasket as claimed in claim 1, wherein the cross-section of said sheet metal collar clamp has a hook-like portion bent back on itself within a region of an edge of said rim of said layer of graphite, and faces towards said flange.
Claim 7
Dependent Claim
36 words
The cylinder-head gasket as claimed in claim 1, wherein the cross-section of said sheet metal collar clamp is bent back on itself within a region of an edge of said rim of said layer of graphite.
Claim 8
Dependent Claim
19 words
The cylinder-head gasket as claimed in claim 2, wherein said sheet metal collar clamp has a plurality of 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) | 1987-08-14 | 1988-02-13 | 1988-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-14 | 1992-02-13 | 1992-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-14 | 1996-02-13 | 1996-08-14 | $7700.00 | Window Closed / Lapsed |