Patent US3770085A successfully refreshed from Google Patents.
US3770085A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vehicle clutch and brake
Assignee: Motors Liquidation Co
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Filing: 1972-01-28
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Granted: 1973-11-06
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Expires: 1992-01-28
Abstract
Abstract A vehicle brake having a stationary housing, an output hub rotatably mounted on the housing and a multiple plate disc brake operatively connected between the housing and the output. The brake plates are spaced such that alternate members are splined to the housing and the output hub. The brake plates are engaged to prevent rotation of the output hub by a pair of pistons one of which is spring applied and pressure released and the other of which is pressure applied. The pistons are actuated independently so that the unactuated piston provides an abutment for the brake plate. The spring applied piston functions as a parking brake so that whenever the vehicle engine is not in operation a plurality of springs urge the piston into engagement with the brake plates to effectively connect the output hub to the stationary housing thereby preventing rotation of the output hub. When the engine is operating, fluid pressure is supplied to the piston to compress the springs thereby disengaging the brake. The fluid pressure to operate the other piston is controlled by a valve to permit selective operation of the brake during vehicle driving to permit the operator to stop or retard the vehicle or in a track laying type vehicle to permit the operator to have steer control. An input shaft is also rotatably mounted in the housing and is selectively connectable with the output hub through a multiple disc clutch to provide a drive to the output hub.
Inventors
- 👤 E Cottingham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:07
CPC Classifications
F; F16; F16D; F16D67/00; F16D67/02; F16D67/04; B; B60; B60T; B60T1/00; B60T1/02; B60T1/06; B60T1/062; F16D55/00; F16D55/24; F16D55/26; F16D55/36; F16D55/40; F16D59/00; F16D59/02; F16D2055/0004; F16D2055/0058; Y; Y10; Y10S; Y10S188/00; Y10S188/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
182 words
A vehicle output drive comprising housing means; input means rotatably mounted in said housing means; output means rotatably mounted in said housing means having a portion circumjacent said input means; brake means selectively operatively connected between said housing means and said output means for selectively preventing rotation of said output means including a plurality of disc members alternately splined to said housing means and said output means, first piston means slidably disposed in said housing means adjacent one of said disc members, spring means for urging said first piston iNto contact with said one disc member to engage said brake means, first chamber means formed between said housing means and said first piston being selectively pressurized to move said piston out of contact with said one disc member to disengage said brake means, a second piston slidably disposed in said housing means adjacent another of said disc members, and second chamber means formed by said housing means and said second piston means and being selectively pressurized to move said second piston into contact with said other disc member to engage said brake.
Claim 2
Dependent Claim
182 words
A vehicle output drive comprising housing means; input means rotatably mounted in said housing means; output means rotatably mounted in said housing means having a portion circumjacent said input means; brake means selectively operatively connected between said housing means and said output means for selectively preventing rotation of said output means including a plurality of disc members alternately splined to said housing means and said output means, first piston means slidably disposed in said housing means adjacent one of said disc members, spring means for urging said first piston iNto contact with said one disc member to engage said brake means, first chamber means formed between said housing means and said first piston being selectively pressurized to move said piston out of contact with said one disc member to disengage said brake means, a second piston slidably disposed in said housing means adjacent another of said disc members, and second chamber means formed by said housing means and said second piston means and being selectively pressurized to move said second piston into contact with said other disc member to engage said brake.
Claim 3
Dependent Claim
45 words
The invention defined in claim 1 and said output drive including a drive clutch comprising a plurality of friction plates alternately operatively connected between said input means and said output means, and selectively operable fluid motor means adjacent said plates for engaging said drive clutch.
Claim 4
Dependent Claim
160 words
A vehicle output brake comprising stationary housing means, output drive means rotatably mounted in said housing means and selectively operable brake means including a plurality of disc members alternately splined to said housing means and said output drive means, first piston means slidably disposed in said housing means adjacent one of said disc members, spring means urging said first piston means into contact with said one of said disc members to engage said brake means, first pressure chamber means adjacent said first piston means for selectively moving said first piston means against said spring means to disengage said brake means when said chamber is pressurized, second piston means adjacent another of said disc members and second pressure chamber means adjacent said second piston means for selectively moving said second piston means into contact with said another of said disc members when said second chamber is pressurized to engage said brake means independently of spring actuation of said first piston means.
Claim 5
Dependent Claim
160 words
A vehicle output brake comprising stationary housing means, output drive means rotatably mounted in said housing means and selectively operable brake means including a plurality of disc members alternately splined to said housing means and said output drive means, first piston means slidably disposed in said housing means adjacent one of said disc members, spring means urging said first piston means into contact with said one of said disc members to engage said brake means, first pressure chamber means adjacent said first piston means for selectively moving said first piston means against said spring means to disengage said brake means when said chamber is pressurized, second piston means adjacent another of said disc members and second pressure chamber means adjacent said second piston means for selectively moving said second piston means into contact with said another of said disc members when said second chamber is pressurized to engage said brake means independently of spring actuation of said first piston means.
Claim 6
Dependent Claim
201 words
A vehicle output brake comprising, housing means; output means rotatably mounted in said housing means; a plurality of brake disc means alternately splined to said hhousing means and said output means; first fluid motor means including piston means having engaged and disengaged positions; spring means for moving said first motor piston means to said engaged position for engaging said brake and said first motor piston means being responsive to the application of fluid pressure to move to the disengaged position for disengaging said brake; and second fluid motor means including piston means having engaged and disengaged positions and being responsive to the application of fluid pressure to move to the engaged position for engaging said brake independently of spring actuation of said first fluid motor piston means; said piston means of said first motor means providing an abutment for said second motor means when said first motor piston means is in the disengaged position and said piston means of said second motor means providing an abutment for said first motor means when said second motor piston means in the disengaged position during the independent spring and fluid pressure actuation of said piston means of said first and second motor means respectively.
Claim 7
Dependent Claim
201 words
A vehicle output brake comprising, housing means; output means rotatably mounted in said housing means; a plurality of brake disc means alternately splined to said hhousing means and said output means; first fluid motor means including piston means having engaged and disengaged positions; spring means for moving said first motor piston means to said engaged position for engaging said brake and said first motor piston means being responsive to the application of fluid pressure to move to the disengaged position for disengaging said brake; and second fluid motor means including piston means having engaged and disengaged positions and being responsive to the application of fluid pressure to move to the engaged position for engaging said brake independently of spring actuation of said first fluid motor piston means; said piston means of said first motor means providing an abutment for said second motor means when said first motor piston means is in the disengaged position and said piston means of said second motor means providing an abutment for said first motor means when said second motor piston means in the disengaged position during the independent spring and fluid pressure actuation of said piston means of said first and second motor means respectively.
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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) | 1976-11-05 | 1977-05-07 | 1977-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-05 | 1981-05-07 | 1981-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-05 | 1985-05-07 | 1985-11-06 | $7700.00 | Window Closed / Lapsed |