Relief pressure switching apparatus for hydraulic working...

Details Relief pressure switching apparatus for hydraulic working... Relief pressure switching apparatus for hydraulic working...

2007-11-26

2010-10-12

Lazo, Thomas E (Department: 3745)

Power plants

Pressure fluid source and motor

Having a signal, indicator or inspection means

C060S429000

Reexamination Certificate

active

07810321

ABSTRACT:
In a relief pressure switching apparatus for hydraulic working machine for switching a relief pressure of a hydraulic actuator circuit in accordance with a specification of a compression crushing apparatus or a breaker to be installed, electromagnetically variable relief valves for determining the relief pressure are provided, and a controller commands the relief pressure selected by an operator from a plurality of relief pressures preliminarily set and stored in combination with a flow rate as matching a working apparatus to the relief valves.

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