Accession Number : ADD010822

Title :   Linear Actuator for Rotary Manipulator Motion.

Descriptive Note : Patent Application,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Wernli,R L

Report Date : 02 Nov 1983

Pagination or Media Count : 10

Abstract : An improved, pressure tolerant, underwater actuator for rotary motion between two manipulator arm segments is presented which comprises a hydraulic linear actuator fastened to one manipulator arm segment, a ram shaft driven by the linear actuator, a linear rack-type sprocket track, an idler sprocket gear attached about the pivot axis at one end of the manipulator arm segment, a second sprocket gear fastened at the other axis of the manipulator arm segment in a manner that it is also fixed to a second manipulator arm segment, a third sprocket gear fastened to the end of the ram shaft and driven by the ram shaft in a manner that it is constrained to move along the rack-type sprocket track, and a closed loop sprocket chain fastened around the idler and drive sprocket gears and meshed with the sprocket gear attached to the ram shaft in a manner that said ram shaft sprocket gear will drive and cause the chain to move double the distance of the actuator when activated. Movement of the sprocket chain causes the gear fixed to the shaft attached to the second manipulator arm segment to rotate thereby rotating the second manipulator arm segment in reference to the position of a first manipulator arm segment. (Author)

Descriptors :   *Patent applications, *Hydraulic actuators, Linear systems, Rotation, Joints, Drive sprockets, Gears, Chains, Remote control, Drive shafts, Torque, Lift, Manipulators, Underwater equipment, Sea water

Subject Categories : Couplers, Fasteners, and Joints
      Hydraulic and Pneumatic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE