US4492189A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rocker cover assembly
Assignee: Nissan Motor Co Ltd
•
Filing: 1982-07-15
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Granted: 1985-01-08
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Expires: 2002-07-15
Abstract
Abstract A rocker cover assembly comprises a rocker cover body made of damping material and including an installation flange section having a plurality of projections; a frame-like pressure-plate disposed in contact with the rocker cover body installation flange section and including an outer bent section to cover the outer periphery of the installation flange section, and a plurality of inner bent portions each of which is plunged into the installation flange section at a location where each projection of the rocker cover body installation flange section is formed; and a seal-ring located within a space defined between the pressure-plate outer bent section and the projections of the rocker cover body installation flange section, thereby maintaining a secure oil-tight seal between the rocker cover body and a cylinder head.
Inventors
- 👤 Naoki Ogawa
- 👤 Akira Toda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:06
CPC Classifications
F; F02; F02B; F02B77/00; F02B77/11; F02B77/13; F02F; F02F7/00; F02F7/006
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
171 words
A rocker cover assembly for covering a cylinder head, comprising: a rocker cover body made of a material having damping capacity and including an installation flange section at which said rocker cover body is mounted on the cylinder head, said installation flange section having a plurality of projections each of which projects toward the cylinder head; a rigid frame-like pressure-plate disposed in contact with the rocker cover body installation flange section and including an outer bent section to cover the outer periphery of said installation flange section, and a plurality of inner bent portions each of which is plunged into said installation flange section at a location where a projection of said rocker cover body installation flange section is formed, said pressure plate being higher in rigidity than said rocker cover body; and a seal-ring interposed between the cylinder head and said rocker cover body installation flange section and located within a space defined between said pressure-plate outer bent section and the projections of said rocker cover body installation flange section.
Claim 2
Dependent Claim
171 words
A rocker cover assembly for covering a cylinder head, comprising: a rocker cover body made of a material having damping capacity and including an installation flange section at which said rocker cover body is mounted on the cylinder head, said installation flange section having a plurality of projections each of which projects toward the cylinder head; a rigid frame-like pressure-plate disposed in contact with the rocker cover body installation flange section and including an outer bent section to cover the outer periphery of said installation flange section, and a plurality of inner bent portions each of which is plunged into said installation flange section at a location where a projection of said rocker cover body installation flange section is formed, said pressure plate being higher in rigidity than said rocker cover body; and a seal-ring interposed between the cylinder head and said rocker cover body installation flange section and located within a space defined between said pressure-plate outer bent section and the projections of said rocker cover body installation flange section.
Claim 3
Dependent Claim
17 words
A rocker cover assembly as claimed in claim 1, wherein said pressure-plate is generally L-shaped in cross-section.
Claim 4
Dependent Claim
30 words
A rocker cover assembly as claimed in claim 2, wherein said pressure-plate is generally C-shaped in cross-section along a vertical plane passing through the inner bent portion of said pressure-plate.
Claim 5
Dependent Claim
27 words
A rocker cover assembly as claimed in claim 1, wherein the outer bent section of said pressure-plate is formed continuously along the outer periphery of said pressure-plate.
Claim 6
Dependent Claim
45 words
A rocker cover assembly as claimed in claim 1, wherein each inner bent portion of said pressure-plate is located in the vicinity of a part of said rocker cover body corresponding to the inner periphery of the installation flange section of said rocker cover body.
Claim 7
Dependent Claim
25 words
A rocker cover assembly as claimed in claim 1, wherein said material having damping capacity is a fibrous composite containing fiber material and synthetic resin.
Claim 8
Dependent Claim
17 words
A rocker cover assembly as claimed in claim 1, wherein said pressure plate is made of metal.
Claim 9
Dependent Claim
18 words
A rocker cover assembly as claimed in claim 1, wherein said pressure plate is made of hard plastic.
Claim 10
Dependent Claim
20 words
A rocker cover assembly as claimed in claim 1, wherein said material having damping capacity consists of a high polymer.
Claim 11
Dependent Claim
20 words
A rocker cover assembly as claimed in claim 1, wherein said material having damping capacity consists of a fibrous composite.
References Cited (Backward Citations)
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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) | 1988-01-08 | 1988-07-09 | 1989-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-08 | 1992-07-09 | 1993-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-08 | 1996-07-09 | 1997-01-08 | $7700.00 | Window Closed / Lapsed |