Uniform flow hydraulic system

Details Uniform flow hydraulic system Uniform flow hydraulic system

1989-03-27

1990-09-11

Price, Carl D.

Motors: expansible chamber type

With motive fluid valve

Inlet fluid supplemented by controlled fluid pressurized in...

92108, 92110, 92165R, 91440, F15B 1108, F15B 1304

Patent

active

049552821

ABSTRACT:
A multi-chamberal hydraulic cylinder and valve system utilizes a single relatively low flow rate pump to provide pressurized fluid during travel, compression and retraction of the piston rod. The piston rod has an effective diameter greater than its physical diameter due to the additional forces applied on an annular piston which is also used to extend and retract the piston rod without supplying pressurized fluid to the interior of the hollow piston rod except during the compression portion of the stroke.

REFERENCES:
patent: 3259026 (1966-07-01), Madland et al.
patent: 3353352 (1967-11-01), Gardner
patent: 3357451 (1967-12-01), Tennis
patent: 3452397 (1969-01-01), Newton
patent: 3559537 (1971-02-01), Faure
patent: 3858485 (1975-01-01), Rosaen et al.
patent: 4205591 (1980-06-01), Mickelson
patent: 4269283 (1981-05-01), Bramberger et al.
patent: 4343226 (1982-08-01), de Almeida
patent: 4750408 (1988-06-01), Stoll

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