Patent US4147074A successfully refreshed from Google Patents.
US4147074A
Expired / Lapsed
US
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Aluminum alloy rocker-arm
Assignee: Toyota Motor Corp
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Filing: 1977-05-23
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Granted: 1979-04-03
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Expires: 1997-05-23
Abstract
Abstract A light weight, strong, and wear resistant rocker-arm of a high strength aluminum alloy with Si 5-25% , Cu less than 6%, Mg less than 1.5%, P 0-0.2% and the balance Al. An element with lubricating properties can be used in the alloy. The cross-section of the rocker-arm is generally T-shaped, or inverted T-shaped.
Inventors
- 👤 Masamitsu Noguchi
- 👤 Yoshiro Komiyama
- 👤 Masaoki Hashimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:39
CPC Classifications
F; F01; F01L; F01L1/00; F01L1/12; F01L1/18; F01L1/181; F16; F16H; F16H53/00; F16H53/06; F01L2301/00; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20576; Y10T74/20882
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
103 words
A rocker-arm body of a high strength aluminum alloy and comprising, an integrally connected wear resistant material pad at one end of the rocker-arm body; a threaded adjusting screw receiving opening formed in the aluminum alloy at the other end of the body; the sectional profile of the arm being T or inverted T-shaped; said aluminum alloy consisting essentially of by weight Si 5-25%, Cu in an amount sufficient to add strength to the alloy but less than about 6%, Mg in an amount sufficient to permit heat strengthening of the alloy but less than about 1.5%, P 0%-0.2% and the balance Al.
Claim 2
Dependent Claim
103 words
A rocker-arm body of a high strength aluminum alloy and comprising, an integrally connected wear resistant material pad at one end of the rocker-arm body; a threaded adjusting screw receiving opening formed in the aluminum alloy at the other end of the body; the sectional profile of the arm being T or inverted T-shaped; said aluminum alloy consisting essentially of by weight Si 5-25%, Cu in an amount sufficient to add strength to the alloy but less than about 6%, Mg in an amount sufficient to permit heat strengthening of the alloy but less than about 1.5%, P 0%-0.2% and the balance Al.
Claim 3
Dependent Claim
17 words
A rocker-arm body according to claim 1 wherein said alloy further contains a lubricant property imparting element.
Claim 4
Dependent Claim
112 words
A rocker-arm body of a high strength aluminum alloy and comprising, an integrally connected wear resistant material pad at one end of the rocker-arm body; a threaded adjusting screw receiving opening formed in the aluminum alloy at the other end of the body; the sectional profile of the arm being T or inverted T-shaped; said aluminum alloy consisting essentially of by weight Si 5-25%, Cu in an amount sufficient to add strength to the alloy but less than about 6%, Mg in an amount sufficient to permit heat strengthening of the alloy but less than about 1.5%, P 0%-0.2%, less than 5% of a lubricant property imparting element, and the balance Al.
Claim 5
Dependent Claim
112 words
A rocker-arm body of a high strength aluminum alloy and comprising, an integrally connected wear resistant material pad at one end of the rocker-arm body; a threaded adjusting screw receiving opening formed in the aluminum alloy at the other end of the body; the sectional profile of the arm being T or inverted T-shaped; said aluminum alloy consisting essentially of by weight Si 5-25%, Cu in an amount sufficient to add strength to the alloy but less than about 6%, Mg in an amount sufficient to permit heat strengthening of the alloy but less than about 1.5%, P 0%-0.2%, less than 5% of a lubricant property imparting element, and the balance Al.
Claim 6
Dependent Claim
29 words
A rocker-arm body according to claim 3 wherein the lubricant property imparting element is one or more of the elements selected from the group consisting of Pb and Sn.
Claim 7
Dependent Claim
25 words
A rocker-arm body according to claim 4 wherein the lubricant property imparting element is Pb, present in an amount less than about 2% by weight.
Claim 8
Dependent Claim
25 words
A rocker-arm body according to claim 4 wherein the lubricant property imparting element is Sn, present in an amount less than about 3% by weight.
Claim 9
Dependent Claim
26 words
A rocker-arm body according to claim 1, wherein the aluminum alloy contains, Si 5-14%, Cu less than 5%, Mg less than 1.5% and the balance Al.
Claim 10
Dependent Claim
30 words
A rocker-arm body according to claim 1 wherein the aluminum alloy contains Si 14-25%, Cu less than 6%, Mg less than 1.5%, P less than 0.2%, and the balance Al.
Claim 11
Dependent Claim
26 words
A rocker-arm body according to claim 3, wherein the aluminum alloy contains, Si 5-14%, Cu less than 5%, Mg less than 1.5% and the balance Al.
Claim 12
Dependent Claim
39 words
A rocker-arm body according to claim 3, wherein the aluminum alloy contains Si 14-25%, Cu less than 6%, Mg less than 1.5%, P in an amount sufficient to refine the Si but less than 0.2%, and the balance Al.
References Cited (Backward Citations)
US2026542A
Cited
US2075089A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-04-02 | 1982-10-02 | 1983-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-02 | 1986-10-02 | 1987-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-02 | 1990-10-02 | 1991-04-03 | $7700.00 | Window Closed / Lapsed |