Hydraulic signal output device

Details Hydraulic signal output device Hydraulic signal output device

2005-06-21

2005-06-21

Michalsky, Gerald A. (Department: 3753)

Fluid handling

Systems

With selective motion for plural valve actuator

C137S596100

Reexamination Certificate

active

06907902

ABSTRACT:
The present invention intends to provide a hydraulic signal output device having a smaller installation space, and thereby enabling to make an installation space of hydraulic machines in an operation room smaller and that of other than the hydraulic machines larger. In addition to this, the present invention intends to allow externally restricting an operation in the operation room. In order to attain the intentions, in a hydraulic signal output device of the present invention, a PPC valve, an EPC valve and a shuttle valve are integrally formed. In one invention, in addition to the above, a pressure oil output port in a pressure-reducing valve in the PPC valve is communicated with a pressure oil input port of a switching valve in an electromagnetic valve, and a pressure oil output port of the switching valve in the electromagnetic valve is communicated with a pilot pipe line.

REFERENCES:
patent: 5295513 (1994-03-01), Hori
patent: 6655229 (2003-12-01), Yamamoto et al.
patent: 3178556 (1994-06-01), None
patent: 2925895 (1995-03-01), None

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