US4260047A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Friction disc and method of making same
Assignee: Motors Liquidation Co
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Filing: 1979-12-03
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Granted: 1981-04-07
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Expires: 1999-12-03
Abstract
Abstract A friction disc for a clutch or brake is formed from a plurality of arcuate segments. The segments are stamped from a rectangular sheet of pregrooved friction material, interconnected by integral tab and slot structures to form an annulus, and bonded to an annular metal member.
Inventors
- 👤 Terry E. Nels
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:41
CPC Classifications
F; F16; F16D; F16D13/00; F16D13/58; F16D13/60; F16D13/64; F16D13/648; F16D65/00; F16D65/02; F16D65/12; F16D65/121; F16D65/127; F16D69/00; F16D2069/004; F16D65/122; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49789; Y10T29/49796
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
116 words
A process for manufacturing a friction disc for use in a clutch or brake assembly; the process comprising; hot-mold a plurality of parallel grooves at a predetermined depth in one side of a rectangular sheet of friction material; stamp a plurality of quarter-circle arcuate segments from said sheet of friction material, said stamping including the formation of a tab and slot at respective ends of each segment; interlock, through the tabs and slots, four of the segments to form an annular disc with adjacent segments having the respective grooves therein displaced 90°; bond one annular disc with the grooved surface facing axially outward, to each side of an annular metal member to form a friction disc.
Claim 2
Dependent Claim
116 words
A process for manufacturing a friction disc for use in a clutch or brake assembly; the process comprising; hot-mold a plurality of parallel grooves at a predetermined depth in one side of a rectangular sheet of friction material; stamp a plurality of quarter-circle arcuate segments from said sheet of friction material, said stamping including the formation of a tab and slot at respective ends of each segment; interlock, through the tabs and slots, four of the segments to form an annular disc with adjacent segments having the respective grooves therein displaced 90°; bond one annular disc with the grooved surface facing axially outward, to each side of an annular metal member to form a friction disc.
Claim 3
Dependent Claim
10 words
A friction disc produced by the process of claim 1.
Claim 4
Independent Claim
127 words
A method of manufacturing a friction disc for use in a clutch or brake assembly; the method comprising; hot-mold a plurality of parallel grooves at a predetermined depth in one side of a rectangular sheet of friction material; stamp a plurality of quarter-circle arcuate segments from said sheet of friction material, said stamping including the formation of a tab and slot at respective ends of each segment; interlock, through the tabs and slots, four of the segments to form an annular disc with adjacent segments having the respective grooves therein displaced 90°; apply an adhesive to both sides of an annular metal member; bond one annular disc with the grooved surface facing axially outward, to each side of the annular metal member to form a friction disc.
Claim 5
Independent Claim
127 words
A method of manufacturing a friction disc for use in a clutch or brake assembly; the method comprising; hot-mold a plurality of parallel grooves at a predetermined depth in one side of a rectangular sheet of friction material; stamp a plurality of quarter-circle arcuate segments from said sheet of friction material, said stamping including the formation of a tab and slot at respective ends of each segment; interlock, through the tabs and slots, four of the segments to form an annular disc with adjacent segments having the respective grooves therein displaced 90°; apply an adhesive to both sides of an annular metal member; bond one annular disc with the grooved surface facing axially outward, to each side of the annular metal member to form a friction disc.
Claim 6
Independent Claim
127 words
A method of manufacturing a friction disc for use in a clutch or brake assembly; the method comprising; hot-mold a plurality of parallel grooves at a predetermined depth in one side of a rectangular sheet of friction material; stamp a plurality of quarter-circle arcuate segments from said sheet of friction material, said stamping including the formation of a tab and slot at respective ends of each segment; interlock, through the tabs and slots, four of the segments to form an annular disc with adjacent segments having the respective grooves therein displaced 90°; apply an adhesive to the ungrooved side of the annular disc; bond one annular disc with the grooved surface facing axially outward, to each side of an annular metal member to form a friction disc.
Claim 7
Independent Claim
127 words
A method of manufacturing a friction disc for use in a clutch or brake assembly; the method comprising; hot-mold a plurality of parallel grooves at a predetermined depth in one side of a rectangular sheet of friction material; stamp a plurality of quarter-circle arcuate segments from said sheet of friction material, said stamping including the formation of a tab and slot at respective ends of each segment; interlock, through the tabs and slots, four of the segments to form an annular disc with adjacent segments having the respective grooves therein displaced 90°; apply an adhesive to the ungrooved side of the annular disc; bond one annular disc with the grooved surface facing axially outward, to each side of an annular metal member to form a friction disc.
Claim 8
Dependent Claim
128 words
A process of manufacturing a friction disc for use in a clutch or brake assembly; the process comprising; hot-mold a plurality of parallel grooves at a predetermined depth in one side of a rectangular sheet of friction material; apply a bonding adhesive to the ungrooved side of the rectangular sheet; stamp a plurality of quarter-circle arcuate segments from said sheet of friction material, said stamping including the formation of a tab and slot at respective ends of each segment; interlock, through the tabs and slots, four of the segments to form an annular disc with adjacent segments having the respective grooves therein displaced 90°; bond one annular disc with the grooved surface facing axially outward, to each side of an annular metal member to form a friction disc.
Claim 9
Dependent Claim
128 words
A process of manufacturing a friction disc for use in a clutch or brake assembly; the process comprising; hot-mold a plurality of parallel grooves at a predetermined depth in one side of a rectangular sheet of friction material; apply a bonding adhesive to the ungrooved side of the rectangular sheet; stamp a plurality of quarter-circle arcuate segments from said sheet of friction material, said stamping including the formation of a tab and slot at respective ends of each segment; interlock, through the tabs and slots, four of the segments to form an annular disc with adjacent segments having the respective grooves therein displaced 90°; bond one annular disc with the grooved surface facing axially outward, to each side of an annular metal member to form a friction disc.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-04-06 | 1984-10-06 | 1985-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-04-06 | 1988-10-06 | 1989-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-04-06 | 1992-10-06 | 1993-04-07 | $7700.00 | Window Closed / Lapsed |