Power plants – Pressure fluid source and motor – Having plural energy outputs
Reexamination Certificate
2005-10-14
2008-08-12
Lazo, Thomas E (Department: 3745)
Power plants
Pressure fluid source and motor
Having plural energy outputs
C091S445000
Reexamination Certificate
active
07409828
ABSTRACT:
Control device1having a changeover valve5, a pump4delivering operating medium, in particular a motor-operated pump or a hand pump, connection devices for connecting the control device1to at least two tools, in particular a first lifting cylinder2and a second lifting cylinder3or the like, the changeover valve5being operable in particular by hand; whereina) the changeover valve5, when the operator lets go of it, can be brought automatically into a basic position in which no pressure build-up in the region of the tools is possible,b) a control valve7is provided between the changeover valve5and the tools, andc) the control valve7can likewise be operated by hand by an operator.
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Patent Office of the People's Republic of China, Notification of Second Office Action, Dec. 14, 2007, China.
Jihai, Jiang, Jinchun, Song and Changshi, Gao, “Hydraulics and Pneumatics”, pp. 138-141; Edition 1, Jan. 2002.
Lazo Thomas E
Lukas Hydraulik GmbH
Vedder Price P.C.
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