Valve arrangement for hydraulic consumer

Details Valve arrangement for hydraulic consumer Valve arrangement for hydraulic consumer

2006-01-10

2006-01-10

Jacyna, J. Casimer (Department: 3751)

Valves and valve actuation

Reciprocating valve

Piston

C251S063000, C251S063500

Reexamination Certificate

active

06983926

ABSTRACT:
A check valve arrangement for a hydraulic consumer which permits connecting the hydraulic consumer selectively to a medium pressure line or a high pressure line. The valve arrangement comprises a medium pressure switching valve10, a high pressure switching valve14, and a check valve6downstream of these valves. The check valve6is constructed as a combined sliding and seat valve and comprises control surfaces28, 29, 38for the medium pressure P1, the high pressure P2, and the pressure applied to a consumer line5, i.e., the pressure applied to the hydraulic consumer. The control surfaces are dimensioned such that a connection of the hydraulic consumer to the high pressure line can occur only when a predetermined limit pressure is reached in the hydraulic consumer.

REFERENCES:
patent: 4401293 (1983-08-01), Rodewald et al.
patent: 4938253 (1990-07-01), Takeo et al.
patent: 6488258 (2002-12-01), Dantlgraber et al.
patent: 2004/0061086 (2004-04-01), Rodrigues
patent: 151 839 (1920-10-01), None
patent: 443 165 (1936-02-01), None
patent: 940 901 (1963-11-01), None

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