Power plants – Pressure fluid source and motor – With control means for structure storing work driving energy
Reexamination Certificate
2005-08-17
2008-10-28
Leslie, Michael (Department: 3745)
Power plants
Pressure fluid source and motor
With control means for structure storing work driving energy
C060S454000, C091S444000
Reexamination Certificate
active
07441406
ABSTRACT:
The invention relates to a fluid circuit for load displacement, having a fluid supply line for conveying fluid from a fluid tank by means of a fluid pump to at least one fluid store of a consumer, and having a fluid return line, through which fluid can be returned, driven by the consumer, from the store to the tank, a valve being provided in the fluid supply line which allows a fluid supply flow to pass through from the tank to the store and blocks a fluid return flow from the store to the tank, the fluid circuit also comprising at least one switchable valve which can be switched between a return flow passage position and a return flow blocking position, and being distinguished by the fact that the switchable valve is in that section of the fluid return line which is separate from the fluid supply line.
REFERENCES:
patent: 3842943 (1974-10-01), Nakamura et al.
patent: 4745743 (1988-05-01), Boulanger
patent: 5355773 (1994-10-01), Winkels
patent: 6305264 (2001-10-01), Yang et al.
patent: 6837045 (2005-01-01), Heusser
patent: 94 15 062.1 (1995-01-01), None
patent: 296 17 922 (1997-01-01), None
patent: 44 23 644 (1998-10-01), None
patent: 1 052 215 (2000-04-01), None
Jungheinrich Aktiengesellschaft
Leslie Michael
Rothwell Figg Ernst & Manbeck P.C.
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