Patent US5049183A successfully refreshed from Google Patents.
US5049183A
Expired / Lapsed
US
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Sintered machine part and method
Assignee: Honda Motor Co Ltd
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Filing: 1990-09-28
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Granted: 1991-09-17
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Expires: 2010-09-28
Abstract
Abstract A method of manufacturing a sintered machine part, by which the machine part can be manufactured to be sufficiently strong, wear and abrasion resistive, and durable against the fatigue caused by recursive impacts, without the heat treatments. In the method, a machine part composed of 0.1 to 0.8% of carbon by weight, 2 to 6% of nickel by weight, 0.6 to 1.6% of molybdenum by weight, 1 to 3% of copper by weight and balance iron is manufactured by mixing partially diffused alloy powder composed of 2 to 6% of nickel by weight, 0.4 to 0.6% of molybdenum by weight, 1 to 3% of copper by weight and balance iron with graphite powder amounting to 0.1 to 0.8% by weight and molybdenum simple powder having 2 to 7 μm mean particle size amounting to 0.2 to 1% by weight, and then by compacting the mixed powder and sintering the compact.
Inventors
- 👤 Tsutomu Saka
- 👤 Akira Fujiwara
- 👤 Tadayuki Tsutsui
- 👤 Osamu Murai
- 👤 Kei Ishii
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 10:50
CPC Classifications
C; C22; C22C; C22C33/00; C22C33/02; C22C33/0257; C22C33/0207; F; F16; F16D; F16D23/00; F16D23/02; F16D23/025
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
143 words
A method of manufacturing a machine part by sintering, the machine part being composed of 0.1 to 0.8% of carbon by weight, 2 to 6% of nickel by weight, 0.6 to 1.6% of molybdenum by weight, 1 to 3% of copper by weight and balance iron, the method comprising steps of: (a) mixing partially diffused alloy powder composed of 2 to 6% of nickel by weight, 0.4 to 0.6% of molybdenum by weight, 1 to 3% of copper by weight and balance iron with graphite powder amounting to 0.1 to 0.8% by weight and molybdenum powder having 2 to 7 μm of mean particle size and amounting to 0.2 to 1% by weight; (b) compacting the mixed powder obtained in the step (a) by compression to form a compact for a machine part; and (c) sintering the compact obtained in the step (b).
Claim 2
Independent Claim
143 words
A method of manufacturing a machine part by sintering, the machine part being composed of 0.1 to 0.8% of carbon by weight, 2 to 6% of nickel by weight, 0.6 to 1.6% of molybdenum by weight, 1 to 3% of copper by weight and balance iron, the method comprising steps of: (a) mixing partially diffused alloy powder composed of 2 to 6% of nickel by weight, 0.4 to 0.6% of molybdenum by weight, 1 to 3% of copper by weight and balance iron with graphite powder amounting to 0.1 to 0.8% by weight and molybdenum powder having 2 to 7 μm of mean particle size and amounting to 0.2 to 1% by weight; (b) compacting the mixed powder obtained in the step (a) by compression to form a compact for a machine part; and (c) sintering the compact obtained in the step (b).
Claim 3
Dependent Claim
37 words
The method of claim 1, the method further comprising before the step (c) of sintering steps of: (1) presintering the compact obtained in the step (b); and (2) repressing the presintered compact obtained in the step (1).
Claim 4
Dependent Claim
24 words
The method of claim 2, wherein the compact is presintered approximately at the temperature of 650° C. to 850° C. in the step (2).
Claim 5
Dependent Claim
21 words
The method of claim 3, wherein the compact is presintered preferably at the temperature of 780° C. in the step (2).
Claim 6
Dependent Claim
17 words
The method of claim 4, wherein the compact is sintered approximately at the temperature of 1,130° C.
Claim 7
Dependent Claim
15 words
The method of claim 1, wherein the sintered machine part manufactured is a synchronizer hub.
Claim 8
Dependent Claim
15 words
The method of claim 2, wherein the sintered machine part manufactured is a synchronizer hub.
Claim 9
Dependent Claim
10 words
The machine part manufactured by the method of claim 1.
Claim 10
Dependent Claim
10 words
The machine part manufactured by the method of claim 2.
Claim 11
Dependent Claim
10 words
The machine part manufactured by the method of claim 3.
Claim 12
Dependent Claim
10 words
The machine part manufactured by the method of claim 4.
Claim 13
Dependent Claim
10 words
The machine part manufactured by the method of claim 5.
Claim 14
Dependent Claim
10 words
A synchronizer hub manufactured by the method of claim 1.
Claim 15
Dependent Claim
10 words
A synchronizer hub manufactured by the method of claim 2.
References Cited (Backward Citations)
US3652905A
Cited
US4985309A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-09-16 | 1995-03-18 | 1995-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-09-16 | 1999-03-18 | 1999-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-09-16 | 2003-03-18 | 2003-09-17 | $7700.00 | Window Closed / Lapsed |