US4179313A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making an article having a cast-in place bearing
Assignee: DOEHLER-JARVIS Inc
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Filing: 1977-12-23
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Granted: 1979-12-18
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Expires: 1997-12-23
Abstract
Abstract A composite part having freely movable components is manufactured by casting one component around the other to form an essentially locked unit and then freeing the components by thermal treatment.
Inventors
- 👤 James H. Koch
- 👤 Richard A. Ritzenthaler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:41
CPC Classifications
B; B22; B22D; B22D19/00; B22D19/12; F; F16; F16C; F16C11/00; F16C11/02; F16C11/04; F16J; F16J1/00; F16J1/10; F16J1/14; F16J1/22; F05; F05C; F05C2203/00; F05C2203/08; F05C2203/0865; F05C2203/0882; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49636; Y10T29/49643; Y10T29/49647; Y10T29/49648; Y10T29/49657; Y10T29/49659; Y10T29/497; Y10T29/49826; Y10T29/4984; Y10T29/49845; Y10T29/49853
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
132 words
A method for making a composite part having at least two components wherein one component is movable with respect to another, comprising: a. introducing a first component having a bearing surface thereon into a casting die; b. casting a second component within said casting die to form a composite part with said first component; c. cooling said composite part to ambient temperature to form a casting in which said first component is captured by and is essentially incapable of relative movement with said second component; and d. then thermally treating said casting by establishing and then substantially eliminating a sufficient temperature differential between said first and second components to free said first component and its bearing surface from said second component, establish a clearance therebetween, and permit relative movement between said components.
Claim 2
Independent Claim
132 words
A method for making a composite part having at least two components wherein one component is movable with respect to another, comprising: a. introducing a first component having a bearing surface thereon into a casting die; b. casting a second component within said casting die to form a composite part with said first component; c. cooling said composite part to ambient temperature to form a casting in which said first component is captured by and is essentially incapable of relative movement with said second component; and d. then thermally treating said casting by establishing and then substantially eliminating a sufficient temperature differential between said first and second components to free said first component and its bearing surface from said second component, establish a clearance therebetween, and permit relative movement between said components.
Claim 3
Dependent Claim
14 words
The method of claim 1, wherein: said first and second components comprise a metal.
Claim 4
Dependent Claim
52 words
The method of claim 2, wherein: said temperature differential is established and substantially eliminated by placing said composite part in an environment having a temperature above that of the composite part and below the melting point of the component of the composite having the lowest melting point and then cooling said part.
Claim 5
Dependent Claim
56 words
The method of claim 2, wherein: said first component comprises a copper alloy, said second component comprises an aluminum alloy, and said thermal treatment comprises establishing and then substantially eliminating said temperature differential by placing said composite part in an environment having a temperature from about 750° F. to 950° F. and cooling said composite part.
Claim 6
Dependent Claim
15 words
The method of claim 2, wherein: said first and second components comprise the same metal.
Claim 7
Dependent Claim
56 words
The method of claim 5, wherein: said first component comprises an aluminum alloy, said second component comprises an aluminum alloy and said thermal treatment comprises establishing and then substantially eliminating said temperature differential by placing said composite part in an environment having a temperature from about 750° F. to 950° F. and cooling said composite part.
Claim 8
Dependent Claim
63 words
The method of claim 2, wherein: said temperature differential is established and substantially eliminated by placing said composite part in an environment having a temperature lower than that of the composite part and above or equal to that of liquid nitrogen and then removing said composite part from said environment so as to permit the composite part to return to a higher temperature.
Claim 9
Dependent Claim
39 words
The method of claim 7, wherein: said composite part is thermally treated by placing the part in liquid nitrogen for about 15 to 30 minutes and then removing the part and permitting the part to return to ambient temperature.
Claim 10
Dependent Claim
46 words
The method of claim 2, wherein: said first metal component is selected from the group consisting of iron and iron alloys and said second metal component is selected from the group consisting of aluminum, aluminum alloys, copper, copper alloys, magnesium, magnesium alloys, zinc, and zinc alloys.
Claim 11
Dependent Claim
61 words
The method of claim 9, wherein: said first component comprises an iron alloy, and said second component comprises zinc, and said thermal treatment comprises establishing and then substantially eliminating said temperature differential by placing said composite part in an environment having a temperature as low as about -120° F. and then permitting said composite part to return to a higher temperature.
Claim 12
Dependent Claim
54 words
The method of claim 9, wherein: said first component comprises an iron alloy, said second component comprises zinc, and said thermal treatment comprises establishing and then substantially eliminating said temperature differential by placing said composite part in an environment having a temperature of about 300° F. to 500° F. and cooling said composite part.
Claim 13
Dependent Claim
54 words
The method of claim 9, wherein: said first component comprises an iron alloy, said second component comprises magnesium and said thermal treatment comprises establishing and then substantially eliminating said temperature differential by placing said composite part in an environment having a temperature of about 700° F. to 850° F. and cooling said composite part.
Claim 14
Dependent Claim
21 words
The method of claim 9, wherein: said first component comprises an iron alloy and said second component comprises an aluminum alloy.
Claim 15
Dependent Claim
46 words
The method of claim 13, wherein: said temperature differential is established and substantially eliminated by placing said composite part in a environment having a temperature above that of the composite part and below the melting point of the aluminum containing component and then cooling said part.
Claim 16
Dependent Claim
31 words
The method of claim 14, wherein: said part is placed in an environment between about 750° F. to about 950° F. for a time from about 7 to about 20 minutes.
Claim 17
Dependent Claim
36 words
The method of claim 15 which further includes the step of: age hardening the aluminum containing component following said thermal treatment by heating the part to a temperature from about 320° F. to about 350° F.
Claim 18
Dependent Claim
16 words
The method of claim 1, wherein: said second component is die cast within said casting die.
Claim 19
Dependent Claim
52 words
The method of claim 1, wherein: said temperature differential is established and substantially eliminated by placing said composite part in an environment having a temperature above that of the composite part and below the melting point of the component of the composite having the lowest melting point and then cooling said part.
Claim 20
Dependent Claim
63 words
The method of claim 1, wherein: said temperature differential is established and substantially eliminated by placing said composite part in an environment having a temperature lower than that of the composite part and above or equal to that of liquid nitrogen and then removing said composite part from said environment so as to permit the composite part to return to a higher temperature.
References Cited (Backward Citations)
US1900617A
Cited
US1881601A
Cited
US2252351A
Cited
US3204304A
Cited
US3314829A
Cited
US3763535A
Cited
US3786543A
Cited
US3953922A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-12-17 | 1983-06-18 | 1983-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-17 | 1987-06-18 | 1987-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-17 | 1991-06-18 | 1991-12-18 | $7700.00 | Window Closed / Lapsed |