Accession Number : AD0163547

Title :   Multiple Area Hydraulic Actuator.

Descriptive Note : Patent,

Corporate Author : OFFICE OF THE SECRETARY OF THE ARMY WASHINGTON D C

Personal Author(s) : Hillberry,Benny M.

Report Date : 15 JUN 1971

Pagination or Media Count : 6

Abstract : Two or more fluid motors of the expandable chamber type are connected to a source of pressurized fluid, and are cross-connected to one another through valving, such that the power delivering element operates rapidly with a low force in one direction, (positive force), until a high resistance is encountered. Then a valve shifts automatically to increase the positive force output while the power delivering element operates at a lower speed. Further, upon reversal of the motors, high-pressure and low-speed retraction occurs if a substantial positive load remains against the power delivering element. This results in nice slow precise control of the apparatus. (Modified author abatract)

Descriptors :   (*HYDRAULIC ACTUATORS, *PATENTS), HYDRAULIC VALVES, SERVOMECHANISMS, SPRINGS, LOADS(FORCES)

Subject Categories : Hydraulic and Pneumatic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE