US3580368A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disc brake cooling means and pump drive mechanism
Assignee: Motors Liquidation Co
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Filing: 1969-06-02
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Granted: 1971-05-25
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Expires: 1989-06-02
Abstract
Abstract A liquid-cooled disc brake wherein the cooling liquid is pumped through the brake by a small high-speed rotary impeller pump driven by the rotating hub of the wheel to be braked. The pump drive uses the disc pack to provide a clutch drive when the brake is energized and a slower speed viscous shear drive when the brake is released.
Inventors
- 👤 Burnette Heck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:55
CPC Classifications
F; F16; F16D; F16D65/00; F16D65/78; F16D65/84; F16D65/853; F16D55/00; F16D55/24; F16D55/26; F16D55/36; F16D55/40; F16D2055/0004; F16D2055/0058; F16D2065/783
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
187 words
A pump drive comprising: a plurality of rotatable discs to be braked, a plurality of rotationally stationary discs arranged to cooperate with said rotatable discs to form a disc pack, means for selectively compressing said disc pack to brake said rotatable discs and for releasing said disc pack to permit rotation of said rotatable discs relative to said stationary discs, a pump drive disc having opposed side friction surfaces and a drive gear formed thereon and being positioned between and frictionally engageable with two of said rotatable discs, said pump drive disc being clutched in driving relation with said two rotatable discs when said disc pack is compressed, and a driven gear in mesh with said drive gear and operatively driving a pump when said drive gear is rotated, said disc pack being immersed in cooling liquid, and said pump drive disc being driven by viscous shear acting on both sides thereof between said pump drive disc and the rotatable discs adjacent thereto at a speed substantially less than the speed of the rotatable discs when the disc pack is released and the rotatable discs are rotating.
Claim 2
Dependent Claim
187 words
A pump drive comprising: a plurality of rotatable discs to be braked, a plurality of rotationally stationary discs arranged to cooperate with said rotatable discs to form a disc pack, means for selectively compressing said disc pack to brake said rotatable discs and for releasing said disc pack to permit rotation of said rotatable discs relative to said stationary discs, a pump drive disc having opposed side friction surfaces and a drive gear formed thereon and being positioned between and frictionally engageable with two of said rotatable discs, said pump drive disc being clutched in driving relation with said two rotatable discs when said disc pack is compressed, and a driven gear in mesh with said drive gear and operatively driving a pump when said drive gear is rotated, said disc pack being immersed in cooling liquid, and said pump drive disc being driven by viscous shear acting on both sides thereof between said pump drive disc and the rotatable discs adjacent thereto at a speed substantially less than the speed of the rotatable discs when the disc pack is released and the rotatable discs are rotating.
Claim 3
Dependent Claim
67 words
The pump drive of claim 1, all of said discs being annular in form and said rotatable discs being mounted by internal splines on a hub having mating external splines, said pump drive disc having an inner peripheral surface positioned in rotational guiding and bearing relation with the radially outer surfaces of said hub splines, and further having said drive gear formed on its outer peripheral surface.
Claim 4
Dependent Claim
99 words
The pump drive of claim 1, all of said discs being annular in form and said rotatable discs being mounted by internal splines on a hub having mating external splines, and said pump drive further comprising: a bearing ring having a splined inner periphery received in meshing relation with said hub external splines between said two rotatable discs and further having a bearing outer peripheral surface receiving said pump drive disc concentrically thereon in bearing relation, said pump drive disc having an inner peripheral surface positioned in rotational guiding and bearing relation with said bearing ring outer peripheral surface.
Claim 5
Dependent Claim
57 words
The pump drive of claim 1, further comprising: means for determining the speed of said pump drive disc relative to the speed of said two rotatable discs, said means including channellike relief areas provided in at least one of the interfacial surfaces providing a friction drive for said pump drive disc when said disc pack is compressed.
References Cited (Backward Citations)
US2828840A
Cited
US3303911A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |