Fluid circuit for maintaining constant pressure between two abut

Details Fluid circuit for maintaining constant pressure between two abut Fluid circuit for maintaining constant pressure between two abut

1990-12-14

1992-07-28

Look, Edward K.

Power plants

Pressure fluid source and motor

Pulsator

60546, 60562, 60581, 92 98D, 226191, F15B 700

Patent

active

051331870

ABSTRACT:
A fluid circuit assembly for maintaining substantially constant pressure between two abutting solid objects, the circuit assembly comprising a master cylinder assembly, a plurality of working cylinder assemblies, piston rods extending from the working cylinder assemblies, a spool on distal ends of the piston rods adapted to engage a surface against which it is desired to maintain constant pressure, the master cylinder and the working cylinders having first chambers in communication with a first fluid circuit, the master cylinder having a second chamber in communication with a source of gas under a selected substantially constant pressure, said gas being in communication with a gas reservoir portion of a liquid/gas tank, a liquid reservoir portion of said tank being in communication with second chambers of said working cylinder assemblies, such that upon change of pressure on the spool by the surface, a reaction is generated in the circuit assembly, such as to move the spool to restore a selected pressure between the spool and the surface.

REFERENCES:
patent: 2950739 (1960-08-01), Lofink
patent: 3039127 (1962-06-01), Molenaar
patent: 3375759 (1968-04-01), Smith
patent: 3579989 (1971-05-01), Stark et al.
patent: 3854646 (1974-12-01), Dorfel et al.
patent: 4692971 (1987-09-01), Ginter

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