Submarine External Hydraulic Fluid - Isolated System Statement of Government Interest.
Patent Application, Filed 1 Oct 92,
DEPARTMENT OF THE NAVY WASHINGTON DC
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A submarine is equipped with a conventional main hydraulic system and has at least one hydraulic actuator located outside the vessels pressurized hull where it is susceptible to contaminants 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 piston positions are related and a two position limit switch is 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.
- Submarine Engineering