Patent US3732953A successfully refreshed from Google Patents.
US3732953A
Expired / Lapsed
US
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Rotatable friction plate assembly and method of making thereof
Assignee: Merlin Gerin SA
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Filing: 1971-01-29
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Granted: 1973-05-15
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Expires: 1991-01-29
Abstract
Abstract A rotatable friction plate assembly for a clutch or a brake comprising a cast light alloy base plate sandwiched between two facings of friction material, such as cupro-chromium. A plurality of heat conducting studs project from the backside of either facing in radial arrays to permit casting of the flange portion between the positioned facings whereby the flange portion is shaped to form radial ribs embedding said studs and to define radial vent conduits.
Inventors
- 👤 R Huet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:43
CPC Classifications
F; F16; F16D; F16D65/00; F16D65/02; F16D65/12; F16D65/128; F16D65/125; F16D2065/13; F16D2065/1304; F16D2065/132; F16D2065/134; F16D2065/1344
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
114 words
A rotatable plate comprising: a pair of unitary structures of friction material having each a radially extending planar annular friction facing and a plurality of heat conducting supporting studs on the backside thereof, and a supporting base plate of cast light alloy having a flange portion, said structure being spaced apart back-to-back with interdigitating studs in sandwich relation with said flange portion cast thereon, said flange portion covering said backside of the friction facings and embedding said studs to enhance heat dissipation from said friction facings, said flange portion being shaped to define a plurality of radiating inner venting conduits circumferentially alternating with radiating solid sections, said studs being embedded in said solid sections.
Claim 2
Dependent Claim
114 words
A rotatable plate comprising: a pair of unitary structures of friction material having each a radially extending planar annular friction facing and a plurality of heat conducting supporting studs on the backside thereof, and a supporting base plate of cast light alloy having a flange portion, said structure being spaced apart back-to-back with interdigitating studs in sandwich relation with said flange portion cast thereon, said flange portion covering said backside of the friction facings and embedding said studs to enhance heat dissipation from said friction facings, said flange portion being shaped to define a plurality of radiating inner venting conduits circumferentially alternating with radiating solid sections, said studs being embedded in said solid sections.
Claim 3
Dependent Claim
136 words
A rotatable friction plate comprising: a pair of unitary structures of friction material having each a radially and circumferentially extending planar annular friction facing and a plurality of heat conducting supporting studs on the backside thereof, said structures being disposed back-to-back so that the free ends of the studs of each structure bear against the backside of the facing of the other structure and a supporting base plate of light alloy having a flange portion cast on the backsides of said structures and shaped to define a plurality of radiating inner venting conduits circumferentially alternating with radiating solid sections, said studs being entirely embedded in said solid sections to enhance heat dissipation from the friction facings of said structures, the entire surface of said backsides of said facings engaging coextensive outer portions of said flange portion.
Claim 4
Dependent Claim
136 words
A rotatable friction plate comprising: a pair of unitary structures of friction material having each a radially and circumferentially extending planar annular friction facing and a plurality of heat conducting supporting studs on the backside thereof, said structures being disposed back-to-back so that the free ends of the studs of each structure bear against the backside of the facing of the other structure and a supporting base plate of light alloy having a flange portion cast on the backsides of said structures and shaped to define a plurality of radiating inner venting conduits circumferentially alternating with radiating solid sections, said studs being entirely embedded in said solid sections to enhance heat dissipation from the friction facings of said structures, the entire surface of said backsides of said facings engaging coextensive outer portions of said flange portion.
Claim 5
Dependent Claim
43 words
A friction plate as set forth in claim 2, said studs being disposed in substantial radial arrays corresponding to said radiating solid sections of said base plate, successive studs of each array being associated alternatively with one and the other of said facings.
Claim 6
Dependent Claim
27 words
A friction plate as set forth in claim 2, said solid sections having outer wall means shaped to define radially succeeding throat portions of said vending conduits.
Claim 7
Dependent Claim
31 words
A friction plate as set forth in claim 2, said studs tapering down from the free ends thereof towards the backside of the facing with which said studs are integrally formed.
References Cited (Backward Citations)
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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) | 1976-05-14 | 1976-11-13 | 1977-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-14 | 1980-11-13 | 1981-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-14 | 1984-11-13 | 1985-05-15 | $7700.00 | Window Closed / Lapsed |