Patent DE560184C successfully refreshed from Google Patents.
US4126492A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brake disc and process for producing the same
Assignee: Honda Motor Co Ltd
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Filing: 1977-09-13
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Granted: 1978-11-21
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Expires: 1997-09-13
Abstract
Abstract A brake disk and process for producing the same which is particularly suitable for use on motorcycles. A stainless steel material of particular chromium content is subjected to a heat-treating and press-quenching step to form a brake disk having a sufficient hardness required for the function of a brake and being of favorable appearance for use on motorcycles.
Inventors
- 👤 Hiromu Okunishi
- 👤 Hideki Nakaji
- 👤 Hiroyuki Suwa
- 👤 Hideaki Sato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:25
CPC Classifications
B; B23; B23P; B23P15/00; B23P15/18; B21; B21D; B21D53/00; B21D53/26; B21D53/34; B21K; B21K1/00; B21K1/28; B21K1/32; C; C21; C21D; C21D1/00; C21D1/02; C21D1/62; C21D1/673; C21D9/00; C21D9/0068; F; F16; F16D; F16D65/00; F16D65/02; F16D65/12; F16D65/125; F16D65/127; F16D2250/00; F16D2250/0038; F16D2250/0053
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
68 words
A process for producing a brake disk characterized in that it is fabricated substantially of a martensitic stainless steel plate material containing at least 10% chromium and having a suitable surface hardness for a brake, including the step of: integrally combining an annular disk member shaped by press-quenching said material to be of a hardness required for the function of a brake with a separate hub fitting member.
Claim 2
Dependent Claim
68 words
A process for producing a brake disk characterized in that it is fabricated substantially of a martensitic stainless steel plate material containing at least 10% chromium and having a suitable surface hardness for a brake, including the step of: integrally combining an annular disk member shaped by press-quenching said material to be of a hardness required for the function of a brake with a separate hub fitting member.
Claim 3
Dependent Claim
52 words
A process for producing brake disks characterized by heating a martensitic stainless steel plate material containing at least 10% chromium to be at an imperfectly quenching temperature set at a hardness required for a brake disk and press-quenching said heated steel plate material to obtain a brake disk of a predetermined shape.
Claim 4
Dependent Claim
52 words
A process for producing brake disks characterized by heating a martensitic stainless steel plate material containing at least 10% chromium to be at an imperfectly quenching temperature set at a hardness required for a brake disk and press-quenching said heated steel plate material to obtain a brake disk of a predetermined shape.
Claim 5
Dependent Claim
36 words
A process for producing integrally shaped brake disks according to claim 2, further including the step of press-shaping and punching the heated material while said material is held and pressed and simultaneously press quenching said material.
Claim 6
Dependent Claim
65 words
A process for producing integrally shaped brake disks according to claim 3, further including the steps of: holding and pressing the peripheral side portion and central portion of said heated material; drawing and shaping the intermediate portion; shaping stepped portions in the boundary portions of said intermediate portion with the peripheral portion and central portion simultaneously with said shaping step, and simultaneously press-quenching said material.
Claim 7
Dependent Claim
43 words
A process for producing integrally shaped brake disks according to claim 3, further including the steps of: cutting off the edge of the heated material; and press-shaping and punching said material while said material is held and pressed, and simultaneously press-quenching said material.
Claim 8
Dependent Claim
35 words
A process for producing integrally shaped brake disks according to claim 2, further including the step of shaping and punching said material in advance and quenching said material while said material is held and pressed.
Claim 9
Dependent Claim
54 words
A process for producing brake disks according to claim 2, further including the steps of: punching and shaping said steel plate material to be circular ring-shaped; boring said material; heating said material; quenching said material while said material is held and pressed; and integrally combining said material with a separately shaped hub fitting member.
Claim 10
Dependent Claim
53 words
A process for producing brake disks according to claim 2, further including the steps of: punching and boring the heated material with a press; press-quenching said material while said material is held and pressed to obtain a ring-shaped annular disk member; and integrally combining said member with a separately shaped hub fitting member.
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) | 1981-11-20 | 1982-05-22 | 1982-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-11-20 | 1986-05-22 | 1986-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-11-20 | 1990-05-22 | 1990-11-21 | $7700.00 | Window Closed / Lapsed |