Patent US4071360A successfully refreshed from Google Patents.
US4071360A
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Method of forming a friction disc member
Assignee: BorgWarner Automotive Transmission and Engine Component Corp
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Filing: 1976-01-19
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Granted: 1978-01-31
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Expires: 1996-01-19
Abstract
Abstract A method of forming a friction disc having projecting teeth including load bearing edge faces, in which one or more surfaces of the disc is indented to reform the edge faces while confined within a die cavity.
Inventors
- 👤 Anthony Mannino, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:12
CPC Classifications
F; F16; F16D; F16D65/00; F16D65/02; F16D65/12; F16D65/123; B; B21; B21D; B21D53/00; B21D53/16; F16D13/00; F16D13/58; F16D13/60; F16D13/64; F16D13/648; F16D13/68; F16D13/683; F16D2065/13; F16D2065/134; F16D2065/1356; F16D2065/1368; F16D2250/00; F16D2250/0023
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
The method of forming a friction disc member having circumferentially spaced teeth including pairs of spaced load bearing edge portions, including the steps of shearing excess material from a piece of sheet metal stock to define said disc member confining said disc member within a die cavity having wall portions adjacent said load bearing edge portions of said teeth, urging a shedder having a pattern of projections formed thereon into penetrating engagement with planar surfaces of said teeth between pairs of edge portions thereby spreading said pairs of edge portions on each tooth into engagement with said adjacent wall portions of said die cavity to form properly sized teeth with pairs of spaced, smooth load bearing edge faces, and moving said shedder with respect to said die cavity for ejecting said disc member from said die cavity.
Claim 2
Independent Claim
137 words
The method of forming a friction disc member having circumferentially spaced teeth including pairs of spaced load bearing edge portions, including the steps of shearing excess material from a piece of sheet metal stock to define said disc member confining said disc member within a die cavity having wall portions adjacent said load bearing edge portions of said teeth, urging a shedder having a pattern of projections formed thereon into penetrating engagement with planar surfaces of said teeth between pairs of edge portions thereby spreading said pairs of edge portions on each tooth into engagement with said adjacent wall portions of said die cavity to form properly sized teeth with pairs of spaced, smooth load bearing edge faces, and moving said shedder with respect to said die cavity for ejecting said disc member from said die cavity.
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) | 1981-01-30 | 1981-08-01 | 1982-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-30 | 1985-08-01 | 1986-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-30 | 1989-08-01 | 1990-01-31 | $7700.00 | Window Closed / Lapsed |