US4927712A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fusible core alloy composites for plastics molding
Assignee: Yoon Technology
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Filing: 1988-05-23
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Granted: 1990-05-22
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Expires: 2008-05-23
Abstract
Abstract Tin-based alloys filled with steel shots or/and reinforced with short tin-coated steel fibers were prepared by melting the alloy phase and by mixing filler shots/fibers with the molten alloy in an air atmosphere with the addition of ammonium chloride. The content of steel shots ranges up to about 40 weight % and the fraction of tin-coated steel fibers ranges up to about 30 weight %. New reinforced composite alloys have a higher strength than unreinforced conventional alloys while keeping the melting temperature of new composites in the same range of unreinforced alloys.
Inventors
- 👤 Yoon O. Lhymn
- 👤 Chang Lhymn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:16
CPC Classifications
B; B22; B22F; B22F5/00; B22F5/007; B29; B29C; B29C33/00; B29C33/44; B29C33/52; C; C22; C22C; C22C47/00; C22C47/02; C22C47/04; C22C49/00; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12486
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
41 words
A tin-based or tin-bismuth eutectic alloy matrix composite usable as a fusible core material in the lost core technology consisting essentially of: (a) a tin-bismuth alloy matrix or a tin-lead antimony alloy matrix; and (b) a reinforcing agent comprising metal shots.
Claim 2
Dependent Claim
41 words
A tin-based or tin-bismuth eutectic alloy matrix composite usable as a fusible core material in the lost core technology consisting essentially of: (a) a tin-bismuth alloy matrix or a tin-lead antimony alloy matrix; and (b) a reinforcing agent comprising metal shots.
Claim 3
Dependent Claim
18 words
The composite of claim 1 wherein said alloy composites were made using an ammoniumchloride cleaning agent during mixing.
Claim 4
Dependent Claim
17 words
The composite of claim 1 wherein the diameter of said metal shots is less than 1 inch.
Claim 5
Dependent Claim
14 words
The composite of claim 1 wherein said metal shot are steel or copper shot.
Claim 6
Dependent Claim
17 words
The composite of claim 1 wherein the diameter of said metal shot is 0.3 to 0.5 m.
Claim 7
Dependent Claim
18 words
The composite of claim 1 wherein the content of said metal shots is less than 50 weight %.
Claim 8
Dependent Claim
19 words
The composite of claim 1 wherein the content of said metal shot is less than about 40 weight %.
Claim 9
Dependent Claim
28 words
The composite of claim 1 wherein the composition of said tin-bismuth alloy is about 80 to 94 weight % tin and about 5 to 20 weight % bismuth.
Claim 10
Dependent Claim
23 words
The composite of claim 1 wherein the composition of said tin-bismuth eutectic alloy is about 43 weight % tin--about 57 weight % bismuth.
Claim 11
Dependent Claim
37 words
The composite of claim 1 wherein the composition of said tin-lead-antimony alloy is about 50 to 65 weight % tin, about 30 to about 40 weight % lead, and about 2 to about 9 weight % antimony.
Claim 12
Dependent Claim
12 words
The composite of claim 1 wherein said metal shots are steel shots.
Claim 13
Dependent Claim
12 words
The composite of claim 1 wherein said metal shots are copper shots.
Claim 14
Dependent Claim
23 words
A reinforced fusible tin-based or tin-bismuth eutectic alloy composite prepared by adding a cleaning agent wherein the reinforcing agent is any metal shots.
Claim 15
Dependent Claim
23 words
A reinforced fusible tin-based or tin-bismuth eutectic alloy composite prepared by adding a cleaning agent wherein the reinforcing agent is any metal shots.
Claim 16
Dependent Claim
21 words
The composite of claim 13 wherein the melting temperature of said reinforcing agent is higher than tin-based or tin-bismuth eutectic alloys.
Claim 17
Dependent Claim
20 words
The composite of claim 13 wherein the weight fraction of said reinforcing agent is less than about 50 weight %.
Claim 18
Dependent Claim
20 words
The composite of claim 13 wherein the weight fraction of said metal shots is less than about 40 weight %.
Claim 19
Dependent Claim
18 words
The composite of claim 13 wherein the diameter of said metal shot is less than about 1 inch.
Claim 20
Dependent Claim
31 words
The composite of claim 13 wherein mechanical strength properties and tensile or compressive strength of said fusible alloy composites are higher than those of the unreinforced alloy containing no metal shots.
References Cited (Backward Citations)
US1628759A
Cited
US3166808A
Cited
US3566512A
Cited
US3622283A
Cited
US3605902A
Cited
US3638734A
Cited
US3864807A
Cited
FR2302346A1
Cited
JPS56123845A
Cited
JPS5789940A
Cited
US4341823A
Cited
JPS5882059A
Cited
JPS594940A
Cited
JPS59136215A
Cited
JPS6094323A
Cited
JPS6163413A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-05-21 | 1993-11-20 | 1994-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-21 | 1997-11-20 | 1998-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-21 | 2001-11-20 | 2002-05-22 | $7700.00 | Window Closed / Lapsed |