US4438734A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Overhead camshaft engine
Assignee: Nissan Motor Co Ltd
•
Filing: 1982-06-02
•
Granted: 1984-03-27
•
Expires: 2002-06-02
Abstract
Abstract An overhead camshaft engine comprises a cylinder head secured to a cylinder block of the engine; a plurality of cam bracket members disposed on the cylinder head to rotatably support a camshaft on the cylinder head; and at least a beam member secured to the cam bracket members to securely connect the cam bracket members with each other, thereby reducing noise emission due to the vibration of the cam bracket members.
Inventors
- 👤 Yoshimasa Hayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:09
CPC Classifications
F; F02; F02F; F02F1/00; F02F1/24; F02F1/26; F02F1/36; F02F1/38; F01; F01L; F01L1/00; F01L1/02; F01L1/04; F01L1/047; F01L1/053; F02B; F02B77/00; F02B77/11; F02B77/13; F02F7/00; F02F7/006; F02F7/0065; F02F7/008; F02B2275/00; F02B2275/20; F02F2001/244; F02F2001/245
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
91 words
An overhead camshaft engine having a camshaft, comprising: a cylinder head secured to a cylinder block of the engine; a plurality of cam bracket members disposed on said cylinder head for rotatably supporting the camshaft on said cylinder head; at least one beam member secured to said plurality of cam bracket members for securely connecting said cam bracket members to each other; and a rocker cover, independent of said beam member and secured to said cylinder block to cover said camshaft, said plurality of cam bracket members, and said beam member.
Claim 2
Dependent Claim
91 words
An overhead camshaft engine having a camshaft, comprising: a cylinder head secured to a cylinder block of the engine; a plurality of cam bracket members disposed on said cylinder head for rotatably supporting the camshaft on said cylinder head; at least one beam member secured to said plurality of cam bracket members for securely connecting said cam bracket members to each other; and a rocker cover, independent of said beam member and secured to said cylinder block to cover said camshaft, said plurality of cam bracket members, and said beam member.
Claim 3
Dependent Claim
34 words
An engine as claimed in claim 1 wherein said engine has intake and exhaust ports and said rocker cover is secured to walls of said cylinder block directly over said intake and exhaust ports.
Claim 4
Dependent Claim
35 words
An engine as claimed in claim 1, wherein said camshaft has an axis and said at least one beam member includes first and second beam members which extend parallel to the axis of the camshaft.
Claim 5
Dependent Claim
45 words
An enigne as claimed in claim 3, wherein a top section of said cylinder head has a plurality of bearing sections formed therein, each of said bearing sections being secured to a cam bracket member to form a camshaft bearing for rotatably receiving the camshaft.
Claim 6
Dependent Claim
60 words
An engine as claimed in claim 4, further comprising first and second bolts associated with each cam bracket for securing said cam bracket members to said bearing sections, said first and second bolts being spaced from each other and passong through said cam bracket members to said bearing sections, said camshaft bearing being disposed between said first and second bolts.
Claim 7
Dependent Claim
32 words
An engine as claimed in claim 5, wherein said first and second beam members are disposed outside of said first and second bolts, respectively with respect to the axis of said camshaft.
Claim 8
Dependent Claim
50 words
An engine as claimed in claim 6, wherein each cam bracket member has generally rectangular cross-section taken along a plane perpendicular to the axis of the camshaft, each of said cam bracket members being formed with upper opposite corners to which said first and second beam members are securely connected.
Claim 9
Dependent Claim
40 words
An engine as claimed in claim 7, wherein said bearing sections of said cylinder head project from the top section surface of said cylinder head and have a generally rectangular cross-section taken along a plane perpendicular to the camshaft axis.
Claim 10
Dependent Claim
22 words
An engine as claimed in claim 8, wherein said first and second beam members are integrally formed with said cam bracket members.
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) | 1987-03-27 | 1987-09-26 | 1988-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-27 | 1991-09-26 | 1992-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-27 | 1995-09-26 | 1996-03-27 | $7700.00 | Window Closed / Lapsed |