US4909198A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aluminum alloy valve lifter with sprayed coating and method of producing same
Assignee: Toyota Motor Corp
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Filing: 1989-02-28
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Granted: 1990-03-20
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Expires: 2009-02-28
Abstract
Abstract An aluminum alloy valve lifter comprises a valve lifter body made of Al-Si (5-20%) type alloy, having silicon average grain diameter of 2 to 40 micrometers, and consisting of a cylindrical portion and a disc portion; an Fe-C type sprayed coating formed on the peripheral surface of the cylindrical portion, containing 0.1% or more of carbon and having a hardness of 300 Hv or more; a wear-resistant chip fixed on the underside of the disc portion; and an adjusting shim set on the upper side of the disc portion.
Inventors
- 👤 Shigeki Shiraya
- 👤 Takesi Nakakobara
- 👤 Hitoshi Ishii
- 👤 Takashi Tomoda
- 👤 Kenji Shimoda
- 👤 Souichi Hayashi
- 👤 Zenichiro Kato
- 👤 Syuichi Ezaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:09
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/01; B32B15/012; F; F01; F01L; F01L1/00; F01L1/12; F01L1/14; F01L1/143; F01L1/20; F01L1/205; F01L2301/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
120 words
An aluminum alloy valve lifter having a sprayed coating comprising: a valve lifter body of an aluminum alloy essentially consisting of 5 to 20% Silicon, an additive element for increasingt strength, aluminum and inevitable impurities, and holding silicon particles having an average grain diameter of from 2 to 40 micrometers in the matrix thereof; an Fe-C type sprayed coating formed on a sliding peripheral surface of said valve lifter body having a carbon content of 0.1% or more and a hardness of 300 Hv or more; a wear-resistant chip fixed on a portion of the valve lifter body for contact with a valve rod; and an adjusting shim set on another portion of the body for contact with a cam.
Claim 2
Dependent Claim
120 words
An aluminum alloy valve lifter having a sprayed coating comprising: a valve lifter body of an aluminum alloy essentially consisting of 5 to 20% Silicon, an additive element for increasingt strength, aluminum and inevitable impurities, and holding silicon particles having an average grain diameter of from 2 to 40 micrometers in the matrix thereof; an Fe-C type sprayed coating formed on a sliding peripheral surface of said valve lifter body having a carbon content of 0.1% or more and a hardness of 300 Hv or more; a wear-resistant chip fixed on a portion of the valve lifter body for contact with a valve rod; and an adjusting shim set on another portion of the body for contact with a cam.
Claim 3
Dependent Claim
27 words
An aluminum alloy valve lifter according to claim 1, wherein said additive element is at least one selected from the group consisting of Mg, Cu and Ni.
Claim 4
Dependent Claim
56 words
An aluminum alloy valve lifter according to claim 1, wherein said Fe-C type sprayed coating is formed by electric arc spraying and has a porosity of 5% or less, each of the spray particles of said sprayed coating having a degree of crush upon adhesion (adhesion length a-adhesion height b/adhesion length a) of 0.95 or more.
Claim 5
Dependent Claim
45 words
An aluminum alloy valve lifter according to claim 1, wherein said Fe-C type sprayed coating consists of an upper portion and a lower portion having a hardness of from 350 to 450 Hv, and a center portion having a porosity of from 5 to 10%.
References Cited (Backward Citations)
US3545415A
Cited
US3628514A
Cited
US4182299A
Cited
JPS536238A
Cited
JPS5334635A
Cited
JPS5342148A
Cited
US4230491A
Cited
JPS5734346A
Cited
JPS58165508A
Cited
JPS58176409A
Cited
JPS58214609A
Cited
US4430970A
Cited
JPS6263105A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-03-19 | 1993-09-18 | 1994-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-03-19 | 1997-09-18 | 1998-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-03-19 | 2001-09-18 | 2002-03-20 | $7700.00 | Window Closed / Lapsed |