Abstract: A push rod assembly having a first section and a second section through which an input force is transmitted to an output member. The first section includes a cylindrical member with a bellows attached thereto. The cylindrical member has a bore therein. The second section includes a piston that is attached to a brake pedal by a pivot pin. The piston divides the bore in the cylindrical member into a first chamber and a second chamber. The piston has a passage therethrough that connects the first chamber with the second chamber. A valve located in the passage controls the communication of fluid from the first chamber to the second chamber. A linkage member which extends into the bore in the cylindrical member is connected to a plate with a slot therein. The pivot pin associated with the brake pedal extends through the slot to attach the plate to the brake pedal.

Abstract: A brake pedal assembly including a pedal lever which is pivotally attached to a housing, a plate pivotally attached to the pedal lever, a push rod attached to said plate, and a pulley arrangement. The cable has a fixed length with a first end attached to the pedal lever and a second end attached to the plate. An operator input applied to the pedal lever moves the pedal lever in an arc about the pivotal attachment of the housing. As the pedal lever moves, the cable length between the pulley mechanism and the first end increases while the length between the pulley mechanism and the second end decreases. A decrease in the length of the cable between the second end and the pulley causes the plate to pivot with respect to the pedal lever. The arcuate movement of the first lever and the pivoting of the plate are combined to provide a push rod with linear movement for actuating a force receiver.

Abstract: A brake pedal assembly including a pedal lever pivotally attached to a housing, a plate having a cam surface pivotally attached on the pedal lever, a push rod attached to the plate, and a roller fixed to the housing which is adapted to engage the cam surface on the plate. An operator input applied to the pedal lever moves the pedal lever in an arc with respect to the pivotal attachment with the housing. The plate moves with the pedal lever and rotating thereon as the cam engages the roller to provide the push rod with linear movement for moving the push rod.

Abstract: A cover for a retention chamber in a master cylinder reservoir which will permit a probe to pass through a tab and pressurize a piston in a pressurizing chamber with a test fluid under pressure. This test fluid will allow an operator to visually inspect the master cylinder for fluid failures at various pressures. In the normal operation, the tab of the cover will allow fluid to flow from a supply chamber into the retention chamber. However, during a brake application when fluid is transmitted through the compensator port as the pressurizing piston moves past the compensator port, the tab will prevent this fluid from being squirted into the supply reservoir. This will assure that a minimum quantity of fluid is always present in the retention chamber to operate the brake system even though a low fluid level indicator in the supply chamber presents a failure warning signal to the operator.