US4135283A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resilient structural member such as a plate spring
Assignee: LuK Lamellen und Kupplungsbau GmbH
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Filing: 1977-03-11
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Granted: 1979-01-23
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Expires: 1997-03-11
Abstract
Abstract A resilient structural member is hardened and tempered, and partially shot peened, forming a roughened surface. The surface is smoothened to an at least partial extent by grinding and polishing in a drum, or by an electrochemical process.
Inventors
- 👤 Ernst Kohlhage
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:52
CPC Classifications
F; F16; F16F; F16F1/00; F16F1/02; F16F1/32; F16F1/324; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49609
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
68 words
Method of producing a resilient structural member such as a plate spring which comprises tempering the member, then directing a stream of particles to impinge on a surface portion of the member so as to harden and roughen the surface portion of the member, and thereafter smoothening to at least a partial extent the material of the roughened surface formed by the impingement of the stream of particles.
Claim 2
Dependent Claim
68 words
Method of producing a resilient structural member such as a plate spring which comprises tempering the member, then directing a stream of particles to impinge on a surface portion of the member so as to harden and roughen the surface portion of the member, and thereafter smoothening to at least a partial extent the material of the roughened surface formed by the impingement of the stream of particles.
Claim 3
Dependent Claim
15 words
Resilient structural member such as a plate spring produced by the method of claim 1.
Claim 4
Dependent Claim
12 words
Method according to claim 1 wherein the surface hardening process is shot-peening.
Claim 5
Dependent Claim
33 words
Method according to claim 3 wherein the intensity of the shot-peening has an Almen Gauge value of substantially A.0.3 mm, and coverage of substantially 70% of the surface by the shot-peening is effected.
Claim 6
Dependent Claim
78 words
Method of producing a resilient member such as a plate-spring which comprises tempering the member, then directing a stream of particles to impinge on a surface portion of the member so as to harden and roughen the surface portion of the member, and thereafter smoothening to at least a partial extent the roughened surface formed by the impingement of the stream of particles, the at least partial smoothening of the roughened surface being effected by removal of material.
Claim 7
Dependent Claim
78 words
Method of producing a resilient member such as a plate-spring which comprises tempering the member, then directing a stream of particles to impinge on a surface portion of the member so as to harden and roughen the surface portion of the member, and thereafter smoothening to at least a partial extent the roughened surface formed by the impingement of the stream of particles, the at least partial smoothening of the roughened surface being effected by removal of material.
Claim 8
Dependent Claim
15 words
Method according to claim 5 wherein the material removal is effected by a mechanical process.
Claim 9
Dependent Claim
15 words
Method according to claim 5 wherein the material removal is effected by an electrochemical process.
Claim 10
Dependent Claim
77 words
Method of producing the resilient structual member such as a plate-spring which comprises tempering the member, then directing a stream of particles to impinge on a surface portion of the member so as to harden and roughen the surface portion of the member, and thereafter smoothening to at least a partial extent the roughened surface formed by the impingement of the stream of particles, the at least partial smoothening of the roughened surface being effected by grinding.
Claim 11
Dependent Claim
77 words
Method of producing the resilient structual member such as a plate-spring which comprises tempering the member, then directing a stream of particles to impinge on a surface portion of the member so as to harden and roughen the surface portion of the member, and thereafter smoothening to at least a partial extent the roughened surface formed by the impingement of the stream of particles, the at least partial smoothening of the roughened surface being effected by grinding.
Claim 12
Dependent Claim
78 words
Method of producing the resilient structural member such as a plate spring which comprises tempering the member, then directing a stream of particles to impinge on a surface portion of the member so as to harden and roughen the surface portion of the member, and thereafter smoothening to at least a partial extent the roughened surface formed by the impingement of the stream of particles, the at least partial smoothening of the roughened surface being effected by polishing.
Claim 13
Dependent Claim
78 words
Method of producing the resilient structural member such as a plate spring which comprises tempering the member, then directing a stream of particles to impinge on a surface portion of the member so as to harden and roughen the surface portion of the member, and thereafter smoothening to at least a partial extent the roughened surface formed by the impingement of the stream of particles, the at least partial smoothening of the roughened surface being effected by polishing.
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) | 1982-01-22 | 1982-07-24 | 1983-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-22 | 1986-07-24 | 1987-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-22 | 1990-07-24 | 1991-01-23 | $7700.00 | Window Closed / Lapsed |