Valve arrangement and hydraulic drive

Details Valve arrangement and hydraulic drive Valve arrangement and hydraulic drive

2006-11-14

2006-11-14

Look, Edward K. (Department: 3745)

Motors: expansible chamber type

With motive fluid valve

Relatively movable inlet and exhaust valves for single...

C091S444000

Reexamination Certificate

active

07134380

ABSTRACT:
The invention concerns a valve arrangement for controlling a hydraulic drive, the supply and the outflow of the hydraulic drive being separately controllable. It is endeavoured to improve the valve arrangement in such a manner that it is intrinsically tight, at the same time having a relatively simple design. For this purpose, a pump pipe and a tank pipe are connected with a first control valve, the first control valve being connected by separate pipes with a second control valve and a third control valve connected in parallel with the second control valve, the second control valve being connected with a first working connection of the hydraulic drive and the third control valve being connected with a second working connection of the hydraulic drive, backflow preventers for preventing the flow from the hydraulic drive in the direction of the tank being connected in parallel with the second control valve and/or the third control valve.

REFERENCES:
patent: 4206688 (1980-06-01), Haak et al.
patent: 4572238 (1986-02-01), Stenlund
patent: 4840111 (1989-06-01), Garnjost
patent: 5097746 (1992-03-01), Asaoka et al.
patent: 5138838 (1992-08-01), Crosser
patent: 5568759 (1996-10-01), Aardema
patent: 5746108 (1998-05-01), Kim
patent: 5960695 (1999-10-01), Aardema et al.
patent: 6131391 (2000-10-01), Poorman
patent: 6293181 (2001-09-01), Hajek et al.
patent: 6354185 (2002-03-01), Sturman
patent: 6467264 (2002-10-01), Stephenson et al.
patent: 6609369 (2003-08-01), Koehler et al.
patent: 6789570 (2004-09-01), Beyrak et al.
patent: 6938413 (2005-09-01), Harnischfeger
patent: 41 19 333 (1992-12-01), None
patent: 43 15 626 (1994-07-01), None
patent: 43 13 250 (1994-10-01), None
patent: 101 33 616 (2001-07-01), None
patent: 102 45 346 (2002-09-01), None
patent: 101 20 996 (2002-10-01), None
patent: 101 50 768 (2003-04-01), None
patent: WO 96/27051 (1996-09-01), None

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