Motors: expansible chamber type – With motive fluid valve – Relatively movable serial valves
Reexamination Certificate
2006-07-25
2006-07-25
Look, Edward K. (Department: 3745)
Motors: expansible chamber type
With motive fluid valve
Relatively movable serial valves
C091S464000, C091S455000
Reexamination Certificate
active
07080590
ABSTRACT:
The invention concerns a valve arrangement for controlling a hydraulic drive having a first working connection (A) and a second working connection (B), and being connectable with or separable from a pressure source (P), the supply and the outflow of the hydraulic drive being separately controllable. It is endeavoured to improve the energetic efficiency of the valve arrangement. For this purpose, the first working connection (A) is connected with a first control valve and the second working connection (B) is connected with a second control valve, the first and the second control valves being connected with each other and with a third control valve, which is connected with a tank.
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patent: WO 96/27051 (1996-09-01), None
Andersen Torben Ole
Hansen Poul Erik
Nielsen Brian
Leslie Michael
Look Edward K.
McCormick Paulding & Huber LLP
Sauer-Danfoss ApS
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