Importance

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Abstract

A brake assembly (10,210,310,410) with a master cylinder totally integrated into a brake assembly. A housing for the brake assembly has an interior separated by a movable wall (30,30') to define first (32,32') and second (34,34') chambers. End element (18) secured to the housing has projection (17) located in the first chamber (32,32') with a plurality of passages (98,100) for communicating fluid to a brake system. A cylindrical member (60, 260,360,460) has a blind bore (74) that extends from a first end (70,264,364) toward a second end (72,266,366). The cylindrical member (60,260,360,460) slidably and sealingly engages the end element (18) to connect the blind bore (74) with the plurality of passages (98,100). A reaction member (120) is located between the hub member (46) and the cylindrical member (60, 260,360,460). A resilient arrangement (80, 388,390,488,490) urges the cylindrical member (60,260,360,460) toward the reaction member (120) to define pressurizing chambers (84,86,284,286,384,386) in the blind bore (74). The actuation force acts through the reaction member (120) to initially move the cylindrical member (60,260,360,460) into engagement with the end element (18) to terminated communication with a source of compensation fluid and establish specific flow paths between the blind bore (74) and the plurality of passages (98,100) connected to the brake system. After overcoming the force of the resilient arrangement (80,388,390,488,490), the cylindrical member (60,260,360,460) continues to move and pressurizing fluid in chambers (84,86,284,286,384,386). This pressurized fluid is communicated through the specified flow paths to effect a brake application.

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First Claim