Pressure actuator

Details Pressure actuator Pressure actuator

1989-08-25

1991-06-25

Butler, Douglas C.

Fluid-pressure and analogous brake systems

Speed-controlled

Having a valve system responsive to a wheel lock signal

188162, 303 93, 303113, 303115, 303119, B60T 832

Patent

active

050261258

ABSTRACT:
A pressure actuator for a vehicle braking system is provided. The actuator has a frame with fluid connections with a pressurized fluid source and a wheel cylinder. A piston is slidably mounted inside an interior bore of the frame. A nut is associated with the piston for moving the piston. A drive screw is threadably engaged with the nut. A motor is provided for powering the drive screw in response to a signal given by a controller. A gear train is provided having at least one gear connected with the first drive screw and another gear being connected with the motor for transmitting torque from the motor to the first drive screw. One of the gears has an inner hub and an outer ring with a spring device preventing relative motion between the hub and the ring unless a predetermined torque value is exceeded whereby the hub has angular rotation with respect to the ring.

REFERENCES:
patent: 2537672 (1951-01-01), James
patent: 3090258 (1963-05-01), Zink et al.
patent: 3420580 (1967-05-01), Dymond
patent: 3549210 (1969-02-01), Birge et al.
patent: 3790225 (1974-02-01), Wehde
patent: 4327414 (1982-04-01), Klein
patent: 4927212 (1990-05-01), Harrison et al.

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