Accession Number : ADD016104

Title :   Submarine External Hydraulic Fluid - Isolated System.

Descriptive Note : Patent, Filed 1 Oct 92, patented 5 Oct 93,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Moody, Paul E

Report Date : 05 Oct 1993

Pagination or Media Count : 6

Abstract : A submarine is equipped with a conventional main hydraulic system and has at least one hydraulic actuator located outside the vessel's pressurized hull where it is susceptible to contamination of its hydraulic fluid. The actuator is operated from an isolation system that includes a slave piston driven by a power piston from the main hydraulic system to keep a desired pressure in the secondary system by operating the power piston only as required for this purpose. Both power and slave pistons positions are related and a two position limit switch as tripped by switch actuators linked to these pistons for operating the power and slave pistons. This isolation system prevents any contaminants in the external system from contaminating the internal system.

Descriptors :   *HYDRAULIC ACTUATORS, *HYDRAULIC FLUIDS, *SUBMARINES, *PATENTS, ACTUATORS, CONTAMINANTS, CONTAMINATION, PISTONS, POWER, PRESSURE, SWITCHES, SUBMARINE HULLS, PRESSURE HULLS, HYDRAULIC PRESSURE

Subject Categories : Submarine Engineering
      Hydraulic and Pneumatic Equipment
      Lubricants and Hydraulic Fluids

Distribution Statement : APPROVED FOR PUBLIC RELEASE