US4485770A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Material for valve-actuating mechanism of internal combustion engine
Assignee: Honda Motor Co Ltd
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Filing: 1981-12-22
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Granted: 1984-12-04
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Expires: 2001-12-22
Abstract
Abstract A material, and a process for producing same, for fabricating components of valve-actuating mechanisms of internal combustion engines, the material comprising an iron-base sintered alloy, which comprises, by weight: 2-7% Cr (chromium); 0.1-1.5% Mo (molybdenum); 0.5-7% W (tungsten); 0.1-3% V (vanadium); and 0.5-3% C (carbon). Upon being subjected to a slide-contact with another member, the material exhibits a high degree of abrasion resistance and at the same time is capable of effectively protecting the material of a member operatively cooperating therewith in slide-contact. The material is thus highly suitable for very frequent slide-contact with a cam member or the like.
Inventors
- 👤 Tsutomu Saka
- 👤 Toshihiro Kamiyama
- 👤 Hiroyuki Endo
- 👤 Yutaka Ikenoue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:33
CPC Classifications
B; B22; B22F; B22F3/00; B22F3/24; C; C22; C22C; C22C33/00; C22C33/02; C22C33/0257; F; F01; F01L; F01L3/00; F01L3/02; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20576; Y10T74/20882
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
45 words
A material for fabricating components of valve-actuating mechanisms of internal combustion engines, consisting of an iron-base sintered alloy consisting of by weight: 2-7% Cr (chromium); 0.1-1.5% Mo (molybdenum); 0.5-7% W (tungsten); 0.1-3% V (vanadium); 1.5-3% C (carbon); 0.1-2% P (phosphorus); and the remainder Fe (iron).
Claim 2
Dependent Claim
45 words
A material for fabricating components of valve-actuating mechanisms of internal combustion engines, consisting of an iron-base sintered alloy consisting of by weight: 2-7% Cr (chromium); 0.1-1.5% Mo (molybdenum); 0.5-7% W (tungsten); 0.1-3% V (vanadium); 1.5-3% C (carbon); 0.1-2% P (phosphorus); and the remainder Fe (iron).
Claim 3
Dependent Claim
88 words
A slide-contact member for a valve-actuating mechanism of an internal combustion engine, said mechanism being adapted to drive a rocker arm through a valve lifter and a push rod by a cam, characterized in that: a working face portion of said slide-contact member is adapted to be brought into slide-contact with said cam, and is formed of an iron-base sintered alloy consisting of by weight: 2-7% Cr (chromium); 0.1-1.5% Mo (molybdenum); 0.5-7% W (tungsten); 0.1-3% V (vanadium); 1.5-3% C (carbon); 0.1-2% P (phosphorus); and the remainder Fe (iron).
Claim 4
Dependent Claim
88 words
A slide-contact member for a valve-actuating mechanism of an internal combustion engine, said mechanism being adapted to drive a rocker arm through a valve lifter and a push rod by a cam, characterized in that: a working face portion of said slide-contact member is adapted to be brought into slide-contact with said cam, and is formed of an iron-base sintered alloy consisting of by weight: 2-7% Cr (chromium); 0.1-1.5% Mo (molybdenum); 0.5-7% W (tungsten); 0.1-3% V (vanadium); 1.5-3% C (carbon); 0.1-2% P (phosphorus); and the remainder Fe (iron).
Claim 5
Dependent Claim
81 words
A slide-contact member for a valve-actuating mechanism of an internal combustion engine, said mechanism being adapted to drive a rocker arm directly by a cam, characterized in that: a working face portion of said slide-contact member is adapted to be brought into slide-contact with said cam, and is formed of an iron-base sintered alloy consisting of by weight: 2-7% Cr (chromium); 0.1-1.5% Mo (molybdenum); 0.5-7% W (tungsten); 0.1-3% V (vanadium); 1.5-3% C (carbon); 0.1-2% P (phosphorus); and the remainder Fe (iron).
Claim 6
Dependent Claim
81 words
A slide-contact member for a valve-actuating mechanism of an internal combustion engine, said mechanism being adapted to drive a rocker arm directly by a cam, characterized in that: a working face portion of said slide-contact member is adapted to be brought into slide-contact with said cam, and is formed of an iron-base sintered alloy consisting of by weight: 2-7% Cr (chromium); 0.1-1.5% Mo (molybdenum); 0.5-7% W (tungsten); 0.1-3% V (vanadium); 1.5-3% C (carbon); 0.1-2% P (phosphorus); and the remainder Fe (iron).
Claim 7
Dependent Claim
15 words
A slide-contact member according to claim 3, wherein: said slide-contact member comprises a rocker arm.
Claim 8
Dependent Claim
15 words
A slide-contact member according to claim 3, wherein: said slide-contact member comprises a valve lifter.
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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) | 1987-12-04 | 1988-06-04 | 1988-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-04 | 1992-06-04 | 1992-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-04 | 1996-06-04 | 1996-12-04 | $7700.00 | Window Closed / Lapsed |