Pneumatic cylinder assemblies

Details Pneumatic cylinder assemblies Pneumatic cylinder assemblies

1978-06-14

1981-07-07

Hershkovitz, Abraham

Expansible chamber devices

Displacement control of plural cylinders arranged in...

92143, F15B 1522

Patent

active

042768136

ABSTRACT:
The present invention provides a method and apparatus for controlling the rate of flow of fluid in a high (e.g. 100 kg/sq cm) pressure hydraulic circuit such as is found in pneumatic piston and cylinder arrangements having hydraulic damping and which may be used to control the feed rate of a cutting tool. Control is achieved by incorporating into the fluid circuit, upstream of the flow control orifice, a pressure reducing valve designed to provide a controlled low (e.g. 7 kg/sq cm) pressure independently of changes in applied pressure or demanded flow rates and which further automatically clears itself of any silt deposited thereon from the hydraulic fluid.

REFERENCES:
patent: 2324515 (1943-07-01), Kalin
patent: 2664859 (1954-01-01), Green
patent: 3137369 (1964-06-01), Stromberg
patent: 3146680 (1964-09-01), Hutter
patent: 3176801 (1965-04-01), Huff
patent: 3554221 (1971-01-01), McMurry
patent: 3557831 (1971-01-01), Katchka
patent: 3890999 (1975-06-01), Moskow
patent: 3979998 (1976-09-01), Wada
patent: 4147179 (1979-04-01), Miura
Pneumatic Constructon Units, Konrad Ziesling, Olhydraulik und Pneumatik 14(1970), No. 7, pp. 295-299.

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