Abstract: A wheel speed sensing device with shape-coupled sensor and exciter ring components reduces the effects of tolerance stack variances in the relative radial and axial locations of the sensor and exciter ring. Additionally, the assembly is readily adapted to installation within the sealed confines of the bearing area of a wheel.

Abstract: A two row, integral pathway, angular contact ball bearing has a single separator to handle both ball rows, but without significant limitation on the total ball count and load capacity. The theoretical full complement ball count is determined, that is, the largest number of balls that could be installed in the first row. The largest even number equal to or smaller than the full complement count is then determined, and chosen for the total number of separator pockets. The separator pockets are formed by adjacent axial fingers, long enough to reach both ball rows, and joined by circumferentially alternating bights. Therefore, at each end of the separator, half the pockets are open, and half closed. When the first ball row is installed against one pathway of the inner race, there is no access limitation, and all pockets, open and closed, are filled. Then, the separator is shifted back to clear the other pathway, before the outer race is inserted over the inner race.

Abstract: A disk type wheel has integrally formed air passages that open to the tire and through a central, closed bottom hub. Pressurized air is supplied axially through the bearing to an outlet surrounded by a mounting boss of the wheel bearing. When the wheel is added in conventional fashion to the boss, the central hub forms an air plenum in cooperation with the boss.

Abstract: The relative speed of the tires of a vehicle is monitored as an indication of the operating state of the vehicle, wherein if the vehicle is not operating in one of a number of predetermined states, the relative speed is monitored as an indication of relative pressure of the vehicle tires, and further wherein differences in relative speed not related to the predetermined states, and not related to differences in relative pressure, are accounted for.

Abstract: A piston type TPM actuator valve has enough clearance between the piston and the wall of the cylindrical passage that it slides to prevent sticking, but still avoids excessive bypass leakage through the same clearance. A plug located in the passage between the piston and the check valve has a vent to atmosphere that prevents leaking air from compressing behind the advancing piston. The plug also carries a seal that is compressed when the piston bottoms out to prevent further venting.