Pressure equalizer

Details Pressure equalizer Pressure equalizer

1988-11-07

1990-02-27

Basinger, Sherman D.

Ships

Submersible device

114334, 405193, B63G 800

Patent

active

049036289

ABSTRACT:
A pressure equalizing cabinet for instruments intended to be submerged in water is described. The device includes a source of compressed air and a piston in a cylinder. One side of the piston is in communication with the interior of the cabinet and the other side is in communication with the ambient. The piston also mounts a needle valve at a port in a conduit between this source of compressed air and the cabinet interior. When the pressure in the ambient exceeds the internal pressure, the piston is displaced to admit a flow of compressed air into the cabinet. When the pressure in the cabinet exceeds the ambient the piston closes the valve. A bleed valve is also provided for venting excess pressure within the cabinet during ascent.

REFERENCES:
patent: 1131712 (1915-03-01), Klein
patent: 3112724 (1963-12-01), Rosen
patent: 3759605 (1973-09-01), Johnson
patent: 4031581 (1977-06-01), Baugh

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