Fluid-pressure and analogous brake systems – Multiple fluid-receiving devices – Multiple motors
Patent
1979-08-13
1981-03-17
Butler, Douglas C.
Fluid-pressure and analogous brake systems
Multiple fluid-receiving devices
Multiple motors
188170, 303 10, 303 50, 303 52, 303 71, B60T 1300
Patent
active
042563500
ABSTRACT:
PCT No. PCT/US79/00598 Sec. 371 Date Aug. 13, 1979 Sec. 102(e) Date Aug. 13, 1979 PCT Filed Aug. 13, 1979
Conventional fluid control circuits for brakes and the like normally comprise a control valve interconnected between a pressurized fluid source and the brakes for selectively actuating the same. A problem arises in that upon starting of the vehicle during cold weather conditions, the hydraulic fluid is not sufficiently warm to ensure efficient brake operation. This invention includes conduits (36) for sequentially communicating fluid from a fluid source (11), through an actuating chamber (14) of a brake (15), and to a control valve (25) in series when the brake (15) is either in its disengaged or engaged condition of operation. Furthermore, upon actuation of the valve (25), an operator is enabled to detect by "feel" the degree of brake engagement.
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Butler Douglas C.
Caterpillar Tractor Co.
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