Abstract:
A diverter valve for use in a vehicle having a power braking system operated by a pressure differential servomotor. The diverter valve directs air under pressure from an emission control pump to the servomotor in response to a signal generated upon actuation of the brake pedal to supply a first fluid under pressure which in conjunction with a second fluid creates the desired pressure differential in the servomotor.
Abstract:
A control for sequentially operating a pressure differential servomotor with air at atmospheric pressure and air above atmospheric pressure in response to an input force for developing an output force to energize an intensifying device to supply a braking system with pressurized fluid.
Abstract:
A servomotor having a front shell with an annular external surface which can vary from an ellipse to a circle joined to a concentric rear shell by a flange. The flange contacts the end plate of the rear shell and biases a peripheral bead of a diaphragm against a seat to seal the interior of the front and rear shells from the atmosphere.
Abstract:
A switching apparatus for selectively diverting the air flow from a pump to a servomotor to create an operational pressure differential across a vacuum suspended wall in response to an operational signal indicating the need for an intensified pressure differential.
Abstract:
A power brake system for a parking brake having a hydraulically operated spring brake with a manual control. A single stroke pump responsive to a pressure differential created by the flow of a first and second fluid under pressure regulated by the manual control is capable of pressurizing hydraulic fluid. This pressurized hydraulic fluid is adapted to overcome the resiliency of the spring brakes to maintain the parking brake in a released position. A flow control device adjacent the manual control will assure that a constant differential pressure is maintained in the pump to stabilize the force of the pressurized hydraulic fluid. An indicator responsive to the pressure of the hydraulic fluid provides a visual indication of the operational mode of the spring brake to an operator.