Fluid-pressure and analogous brake systems – Multiple fluid-receiving devices – Multiple motors
Patent
1989-10-26
1990-06-19
Butler, Douglas C.
Fluid-pressure and analogous brake systems
Multiple fluid-receiving devices
Multiple motors
188 723, 188170, 188216, 188349, 303 976, 303 71, 303 962, B60T 1300, B60T 1322, F16D 6524
Patent
active
049347608
ABSTRACT:
A friction brake mechanism having a pair of front brake assemblies and a pair of rear brake assemblies receives pressurized fluid at the same time and at the same pressure from a hydraulic control apparatus. Each of the brake assemblies has a brake piston movable in a chamber between a holding position and a releasing position and a plurality of brake plates and a plurality of brake disks interleaved with the brake plates. A first spring system is associated with the pair of front brake assemblies and a second spring system is associated with the rear brake assemblies. The first spring system provides a different force than the second spring system to cause the rear brake assemblies to be engaged a predetermined period of time ahead of the pair of front brake assemblies without any design change in the hydraulic control apparatus.
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Butler Douglas C.
Caterpillar Inc.
Rhoads Kenneth A.
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