Patent US4587177A successfully refreshed from Google Patents.
US4587177A
Expired / Lapsed
US
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Cast metal composite article
Assignee: Clevite Industries Inc
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Filing: 1985-04-04
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Granted: 1986-05-06
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Expires: 2005-04-04
Abstract
Abstract A metal article such as a piston for a diesel engine has at least one portion which includes a matrix composite reinforced by inorganic ceramic fibers, wherein the density of fibers and/or the fiber orientation in the matrix composite is varied to provide superior resistance to thermal fatigue while having superior strength and wear characteristics.
Inventors
- 👤 Milton E. Toaz
- 👤 Martin D. Smalc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:33
CPC Classifications
B; B22; B22D; B22D19/00; B22D19/14; B22D19/0009; B22D19/0027; F; F02; F02B; F02B23/00; F02B23/02; F02B23/06; F02B23/0603; F02B23/0696; F02F; F02F3/00; F02F3/26; F02B3/00; F02B3/06; F05; F05C; F05C2201/00; F05C2201/02; F05C2201/021; F05C2201/028; F05C2253/00; F05C2253/16; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12458; Y10T428/12486
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
118 words
A cast metal article comprising a body made from a metal taken from the group consisting of aluminum, magnesium, zinc and alloys thereof, said body having a first part of only said metal and a second composite part containing both said metal and a preform insert member of a ceramic fiber material, said preform insert member having a first preselected characteristic portion directly adjacent said first body portion oriented for achieving a highly reliable bond between the first part of the body and the second composite part, a second preselected characteristic portion apart from said first preselected characteristic portion oriented for providing optimum thermal fatigue and wear properties, thereby not necessitating the need for a special surface coating.
Claim 2
Dependent Claim
118 words
A cast metal article comprising a body made from a metal taken from the group consisting of aluminum, magnesium, zinc and alloys thereof, said body having a first part of only said metal and a second composite part containing both said metal and a preform insert member of a ceramic fiber material, said preform insert member having a first preselected characteristic portion directly adjacent said first body portion oriented for achieving a highly reliable bond between the first part of the body and the second composite part, a second preselected characteristic portion apart from said first preselected characteristic portion oriented for providing optimum thermal fatigue and wear properties, thereby not necessitating the need for a special surface coating.
Claim 3
Dependent Claim
27 words
The article of claim 1 wherein said first preselected characteristic portion of composite part has a lower density of ceramic fibers than said second preselected characteristic portion.
Claim 4
Dependent Claim
47 words
The article of claim 2 wherein said density of fibers of said first preselected characteristic portion is generally from about 0 to about 5 volume percent and the density of fibers of said second preselected characteristic portion is generally from about 10 to about 50 volume percent.
Claim 5
Dependent Claim
38 words
The article of claim 1 wherein said first preselected characteristic portion directly adjacent said first body portion has a first orientation of ceramic fibers and the second preselected characteristic portion has a second different orientation of ceramic fibers.
Claim 6
Dependent Claim
27 words
The article of claim 1 wherein said first preselected characteristic portion has a lower density and different orientation of ceramic fibers from said second preselected characteristic portions.
Claim 7
Dependent Claim
23 words
The article of claim 1 wherein said preform insert member has a third preselected transitional characteristic portion between said first and second portion.
Claim 8
Dependent Claim
18 words
The article of claim 6 wherein said fibers in the third preselected transitional portion are of random orientation.
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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) | 1989-05-05 | 1989-11-04 | 1990-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-05-05 | 1993-11-04 | 1994-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-05-05 | 1997-11-04 | 1998-05-06 | $7700.00 | Window Closed / Lapsed |