Accession Number : ADD011794

Title :   Pneumatic Actuator Device.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON DC

Personal Author(s) : Gazzera,R W

Report Date : 16 Apr 1985

Pagination or Media Count : 7

Abstract : A closed center four-way poppet actuator control device is incorporated into a pneumatic actuation system for controlling the movement of flight surfaces. The closed center four-way poppet actuator control device has a housing, a pair of two-way poppet valves in the housing, a rocker arm assembly mounted on the housing and connected to the pair of two-way poppet valves, and a diaphragm assembly also mounted in the housing and in contact with the two-way valves. A torquemotor-driver assembly connected to the diaphragm assembly actuates the two-way valves as determined by control symbols. The rocker arm causes the two-way valves to function oppositely each other: one allows high pressure gas to be input to a lobe motor acutator while the other allows gas to be ouput from the lobe motor actuator. Each two-way valve has a cylindrical poppet valve for inletting the gas to the actuator and a disk poppet valve for outputting the gas to the actuator and a disk poppet valve for outputting the gas from the actuator to a vent. The actuator causes movement of the flight surfaces through a gearbox. A velocity transducer monitors this movement and transmits this movement to an electronic control unit which senmds control signals to drive the torque motor-driver assembly that actuates said actuator control device. (Author)

Descriptors :   *PATENTS, *PNEUMATIC ACTUATORS, *PNEUMATIC VALVES, DIAPHRAGMS(MECHANICS), CAMS, PNEUMATIC SERVOMECHANISMS, GAS FLOW, HIGH PRESSURE, DRIVES, FLIGHT CONTROL SYSTEMS, GUIDED MISSILE COMPONENTS, FINS

Subject Categories : Hydraulic and Pneumatic Equipment
      Pumps, Filters, Pipes, Tubing, Fittings & Vlvs
      Guided Missiles

Distribution Statement : APPROVED FOR PUBLIC RELEASE