Patent US4524046A successfully refreshed from Google Patents.
US4524046A
Expired / Lapsed
US
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Method for manufacturing a cam-cam shaft assembly
Assignee: Toyota Motor Corp
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Filing: 1984-04-16
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Granted: 1985-06-18
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Expires: 2004-04-16
Abstract
Abstract A method for manufacturing a firm and rigid cam-cam shaft assembly, which comprises the steps: (a) molding a component having through-hole therein from a material of an alloy to be sintered, said material allowing the first ratio of the contraction of the inner diameter of the component at joining portion when the component is singly sintered to the inner diameter thereof before sintering to be more than 2%; (b) presintering said component; (c) assembling said component onto a metal shaft such that said metal shaft may be inserted into said through-hole; and (d) sintering said component assembled onto the metal shaft, whereby the joining of the component to the metal shaft is carried out in such a manner that the second ratio of the difference between the outer diameter of the metal shaft and the inner diameter of the contracted component after sintering to the outer diameter of the metal shaft is more than 2%.
Inventors
- 👤 Tetsuya Suganuma
- 👤 Koji Kazuoka
- 👤 Shuichi Fujita
- 👤 Yoshitaka Takahashi
- 👤 Katsuhiko Ueda
- 👤 Hitoshi Nakamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:34
CPC Classifications
F; F16; F16H; F16H53/00; F16H53/02; F16H53/025; B; B22; B22F; B22F7/00; B22F7/06; B22F7/062; C; C22; C22C; C22C33/00; C22C33/02; C22C33/0257; C22C33/0278; C22C33/0285; B22F2998/00
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
121 words
A method for manufacturing a cam-cam shaft assembly, which comprises the steps of: (a) molding a component having a through-hole therein from an alloy material to be sintered, said material exhibiting a ratio of contraction of an inner diameter of said component at a joining portion when the component is sintered alone to said inner diameter thereof before sintering to be more than 2%; (b) presintering said component; (c) assembling said component onto a metal shaft such that said metal shaft is inserted into said through-hole; and (d) sintering said component assembled onto said metal shaft, whereby the joining of said component to said metal shaft is carried out in such a manner that the apparent interference is more than 2%.
Claim 2
Independent Claim
121 words
A method for manufacturing a cam-cam shaft assembly, which comprises the steps of: (a) molding a component having a through-hole therein from an alloy material to be sintered, said material exhibiting a ratio of contraction of an inner diameter of said component at a joining portion when the component is sintered alone to said inner diameter thereof before sintering to be more than 2%; (b) presintering said component; (c) assembling said component onto a metal shaft such that said metal shaft is inserted into said through-hole; and (d) sintering said component assembled onto said metal shaft, whereby the joining of said component to said metal shaft is carried out in such a manner that the apparent interference is more than 2%.
Claim 3
Dependent Claim
20 words
A method for manufacturing a cam-cam shaft assembly claimed in claim 1 wherein said apparent interference is more than 3%.
Claim 4
Dependent Claim
20 words
A method for manufacturing a cam-cam shaft assembly claimed in claim 1 wherein said apparent interference is more than 4%.
Claim 5
Dependent Claim
73 words
A method for manufacturing a cam-cam shaft assembly claimed in claim 1, wherein the alloy comprises, in terms of weight, from 2.5 to 7.5% of Cr, from 0.1 to 3.0% of Mn, from 0.2 to 0.8% of P, from 1.0 to 5.0% of Cu, from 0.5 to 2.0% of Si, from 0 to 3.0% of Mo, from 1.5 to 3.5% of C, and the balance being Fe with less than 2.0% of impurities.
Claim 6
Dependent Claim
73 words
A method for manufacturing a cam-cam shaft assembly claimed in claim 3, wherein the alloy comprises, in terms of weight, from 4.5 to 6.5% of Cr, from 0.1 to 1.5% of Mn, from 0.35 to 0.65% of P, from 1.5 to 3.0% of Cu, from 0.7 to 1.5% of Si, from 0.5 to 1.5% of Mo, from 1.8 to 3.0% of C, and the balance being Fe with less than 2% of impurities.
Claim 7
Dependent Claim
55 words
A method for manufacturing a cam-cam shaft assembly claimed in claim 1 wherein the alloy comprises, in terms of weight, from 15 to 25% of Cr, from 0.3 to 0.8% of P, from 0 to 3.0% of Mo, from 2.0 to 4.0% of C, and the balance being Fe with less than 2% of impurities.
Claim 8
Dependent Claim
73 words
A method for manufacturing a cam-cam shaft assembly claimed in claim 2, wherein the alloy comprises, in terms of weight, from 2.5 to 7.5% of Cr, from 0.1 to 3.0% of Mn, from 0.2 to 0.8% of P, from 1.0 to 5.0% of Cu, from 0.5 to 2.0% of Si, from 0 to 3.0% of Mo, from 1.5 to 3.5% of C, and the balance being Fe with less than 2.0% of impurities.
Claim 9
Dependent Claim
73 words
A method for manufacturing a cam-cam shaft assembly claimed in claim 7, wherein the alloy comprises, in terms of weight, from 4.5 to 6.5% of Cr, from 0.1 to 1.5% of Mn, from 0.35 to 0.65% of P, from 1.5 to 3.0% of Cu, from 0.7 to 1.5% of Si, from 0.5 to 1.5% of Mo, from 1.8 to 3.0% of C, and the balance being Fe with less than 2% of impurities.
Claim 10
Dependent Claim
55 words
A method for manufacturing a cam-cam shaft assembly claimed in claim 2, wherein the alloy comprises, in terms of weight, from 15 to 25% of Cr, from 0.3 to 0.8% of P, from 0 to 3.0% of Mo, from 2.0 to 4.0% of C, and the balance being Fe with less than 2% of impurities.
Claim 11
Dependent Claim
73 words
A method for manufacturing a cam-cam shaft assembly claimed in claim 3, wherein the alloy comprises, in terms of weight, from 2.5 to 7.5% of Cr, from 0.1 to 3.0% of Mn, from 0.2 to 0.8% of P, from 1.0 to 5.0% of Cu, from 0.5 to 2.0% of Si, from 0 to 3.0% of Mo, from 1.5 to 3.5% of C, and the balance being Fe with less than 2.0% of impurities.
Claim 12
Dependent Claim
73 words
A method for manufacturing a cam-cam shaft assembly claimed in claim 10, wherein the alloy comprises, in terms of weight, from 4.5 to 6.5% of Cr, from 0.1 to 1.5% of Mn, from 0.35 to 0.65% of P, from 1.5 to 3.0% of Cu, from 0.7 to 1.5% of Si, from 0.5 to 1.5% of Mo, from 1.8 to 3.0% of C, and the balance being Fe with less than 2% of impurities.
Claim 13
Dependent Claim
55 words
A method for manufacturing a cam-cam shaft assembly claimed in claim 3, wherein the alloy comprises, in terms of weight, from 15 to 25% of Cr, from 0.3 to 0.8% of P, from 0 to 3.0% of Mo, from 2.0 to 4.0% of C, and the balance being Fe with less than 2% of impurities.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-06-17 | 1988-12-17 | 1989-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-17 | 1992-12-17 | 1993-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-17 | 1996-12-17 | 1997-06-18 | $7700.00 | Window Closed / Lapsed |