Accession Number : ADD017331

Title :   Hydraulic Cylinder Assembly For Use In Variable External Pressure Environments.

Descriptive Note : Patent, Filed 12 Oct 93, patented 15 Nov 94,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Bodycoat, Peter R ; DiNola, P

Report Date : 15 Nov 1994

Pagination or Media Count : 11

Abstract : A hydraulic cylinder assembly for use in a variable external pressure environment provided. A hydraulic cylinder exposed to the variable external pressure environment has two chambers separated from one another by a piston. Hydraulic fluid fills each of the two chambers. In an 'at work' mode the hydraulic fluid fills each of the two chambers is pressurized to the variable external pressure. In an 'at rest' mode, pressure of the hydraulic fluid is selectively varied from the variable external pressure in one of the two chambers such that the piston moves. The entire assembly can be installed between the pressure and outer hulls of a submarine and utilize seawater to equalize the pressure in a balanced power stroke circuit.

Descriptors :   *CYLINDRICAL BODIES, *HYDRAULIC EQUIPMENT, *PATENTS, ENVIRONMENTS, VARIABLES, PRESSURE, EXTERNAL, POWER, CIRCUITS, ASSEMBLY, HYDRAULICS, SEA WATER, CHAMBERS, HULLS(STRUCTURES), REST, HYDRAULIC FLUIDS, VARIABLE PRESSURE, FILLERS

Subject Categories : Hydraulic and Pneumatic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE