Abstract: A coupling assembly includes a housing having a stationary section. A clutch assembly is disposed within the stationary housing section and is operable between an engaged condition in which the clutch assembly is effective to transmit rotational force between an input member and an output member and a disengaged condition in which the clutch assembly is ineffective to transmit rotational force. A brake assembly is disposed within the stationary housing section. The brake assembly is operable between an engaged condition in which it is effective to retain the output member against rotation relative to the stationary housing section and a disengaged condition in which the brake assembly is ineffective to retain the output member against rotation relative to the housing. An actuator assembly is disposed within the stationary housing section and is operable to effect operation of the brake and clutch assemblies between their engaged and disengaged conditions.

Abstract: A brake and anti-skid control utilizing optical input sensors for determining wheel speed or position and suitable for aircraft use is disclosed. A valve control has a continuous source of pressurized hydraulic fluid, a hydraulically actuated wheel rotation brake device which responds to applied hydraulic pressure to apply a braking force to the wheel to arrest wheel rotation, a low pressure hydraulic fluid return, and a flow control servo valve interconnecting the source, the return, and the braking device for directing fluid from the source to the braking device when in a first state and for directing fluid from the braking device to the return when in a second state. Applied hydraulic pressure is monitored and if that monitored pressure exceeds a command pressure, further fluid from the braking device is diverted to the return.