Abstract: In a vehicular brake system such as for use in a commercial aircraft, a torque limiter for maintaining the torque supplied by the braked wheels below a predetermined maximum value. The torque limiter includes a plurality of torque pistons which sense the torque of the wheels and operate in response to a torque value greater than the desired value to isolate the metered brake fluid within the brake cylinders and subsequently reduce the pressure of the brake fluid within the brake cylinders to release the brakes and decrease torque. The torque pistons are mounted in a piston carrier and extend from the piston carrier to engage notches formed in a torque arm housing that at least partially surrounds the piston carrier. Torque piston movement is initiated by relative rotational movement between the piston carrier and torque arm housing caused by an excessive reaction torque from the vehicle structure to the torque produced by the brakes.

Abstract: A brake system wherein a manually operated foot pedal actuates a metering valve that controls the pressure magnitude of fluid applied to a set of main brake pistons which push stator brake plates against rotating brake plates resulting in wheel braking torque; and further wherein a force balanced piston and a control valve, modulates the fluid pressure applied to the set of main brake pistons in response to wheel braking torque reaction, such that maximum brake torque is limited in direct proportion to the magnitude of pressure metered.