US3773153A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotor for clutch or brake
Assignee: Borg Warner Corp
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Filing: 1972-01-26
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Granted: 1973-11-20
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Expires: 1992-01-26
Abstract
Abstract A rotor for use in disc brakes or clutches adapted to be cooled by a fluid passing between and across spaced friction surfaces which rotor includes a pair of spaced apart, annular discs joined together for conjoint rotation and a fin assembly disposed between the discs formed from a strip of relatively thin material folded to define a plurality of adjacent folds disposed in an annular configuration which fin assembly acts to promote and turbulize the flow of fluid between the annular discs and also acts in a heat exchange relationship between the annular discs and the fluid.
Inventors
- 👤 R Smirl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:33
CPC Classifications
F; F16; F16D; F16D65/00; F16D65/02; F16D65/12; F16D65/128; F16D13/00; F16D13/58; F16D13/72; F16D43/00; F16D43/02; F16D43/04; F16D43/06; F16D43/08; F16D43/10; F16D65/123; F16D65/125; F16D2065/13; F16D2065/1304; F16D2065/1316; F16D2065/1328; F16D2065/134; F16D2065/1352; F16D2065/1392
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
193 words
An annular friction member for a brake or clutch comprising a pair of spaced apart annular discs; a fin assembly disposed between said discs formed from a strip of relatively thin material folded to define a plurality of adjacent folds disposed in an annular configuration, each fold including a pair of planar surfaces joined together along a common line and a radially extending channel defined between said planar surfaces; connecting means independent of said fin assembly disposed between said discs joining said discs for conjoint rotation and adapted to space said discs apart thereby resisting compressive loads tending to urge said discs together; and a plurality of louvres extending substantially normal to and between said discs and formed integral with and extending from at least some of said planar surfaces to provide openings therein, including a first set of louvres extending from one of said planar surfaces and inclined in one direction to direct air into said channel defined between said planar surfaces and a second set of louvres extending from one of said planar surfaces and inclined in the opposite direction to direct air from said channel defined between said planar surfaces.
Claim 2
Dependent Claim
193 words
An annular friction member for a brake or clutch comprising a pair of spaced apart annular discs; a fin assembly disposed between said discs formed from a strip of relatively thin material folded to define a plurality of adjacent folds disposed in an annular configuration, each fold including a pair of planar surfaces joined together along a common line and a radially extending channel defined between said planar surfaces; connecting means independent of said fin assembly disposed between said discs joining said discs for conjoint rotation and adapted to space said discs apart thereby resisting compressive loads tending to urge said discs together; and a plurality of louvres extending substantially normal to and between said discs and formed integral with and extending from at least some of said planar surfaces to provide openings therein, including a first set of louvres extending from one of said planar surfaces and inclined in one direction to direct air into said channel defined between said planar surfaces and a second set of louvres extending from one of said planar surfaces and inclined in the opposite direction to direct air from said channel defined between said planar surfaces.
Claim 3
Dependent Claim
26 words
An annular friction member as in claim 1 in which said fin assembly is attached to each of said discs so as to conduct heat therebetween.
Claim 4
Dependent Claim
54 words
An annular friction member as in claim 1 in which said louvres are formed integral with and extend outward from each planar surface of the pairs of surfaces and are inclined in each direction on each surface so as to direct air into and from the channel defined between each pair of planar surfaces.
Claim 5
Dependent Claim
36 words
An annular friction member as in claim 1 including a hub member attached to at least one of said discs adapted to be connected to a rotary driving member and to transmit torque to said discs.
Claim 6
Dependent Claim
28 words
An annular friction member as in claim 4 in which said Hub member is attached to said disc member by means of a plurality of axially flexible straps.
Claim 7
Dependent Claim
56 words
An annular friction member as in claim 1 in which said fin assembly is formed from a plurality of strips of relatively thin material of successively increasing length, each strip folded to define a plurality of adjacent folds, each strip disposed in an annular configuration, adjacent strips being concentric and having successively increasing numbers of folds.
Claim 8
Dependent Claim
34 words
An annular friction member as in claim 6 in which some of said adjacent folds of one of said strips are staggered with respect to some of said adjacent folds of said adjacent strip.
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) | 1976-11-19 | 1977-05-21 | 1977-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-19 | 1981-05-21 | 1981-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-19 | 1985-05-21 | 1985-11-20 | $7700.00 | Window Closed / Lapsed |