Motors: expansible chamber type – With motive fluid valve – Contracting chamber exhaust valve controlled by expanding...
Reexamination Certificate
2007-06-12
2007-06-12
Nguyen, Hoang (Department: 3748)
Motors: expansible chamber type
With motive fluid valve
Contracting chamber exhaust valve controlled by expanding...
C091S435000, C091S461000
Reexamination Certificate
active
10515255
ABSTRACT:
The invention relates to hydraulic control in a hydraulic system for the operation of a machine tool such as a press for processing material of a certain type, especially for the operation of the scrap cutters. Said control allows for impact attenuation and combined rapid motion switching with load compensation and transfer of a hydraulic medium of a hydraulic cylinder for the movement of the other. According to the invention, said control comprises hydraulic media of a hydraulic cylinder for pre-control of a first main valve element (2.4.0), a second main valve element (2.7.0) and a third main valve element (3.7.0) which are functionally combined and a fourth valve (2.5).
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International Search Report for corresponding International Application No. PCT/DE 03/01022.
Klother Andreas
Post Karl-Heinz
Metso Lindemann GmbH
Nguyen Hoang
Polster Lieder Woodruff & Lucchesi L.C.
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