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1. (WO2001002735) SWITCHING DEVICE FOR A MACHINE

Pub. No.:    WO/2001/002735    International Application No.:    PCT/EP2000/005976
Publication Date: Fri Jan 12 00:59:59 CET 2001 International Filing Date: Wed Jun 28 01:59:59 CEST 2000
IPC: E02F 9/22
F15B 1/02
F15B 1/027
F15B 13/00
F15B 20/00
Applicants: HYDAC FLUIDTECHNIK GMBH
THIRY, Gerd, Anton
BÄR, Harald
SCHAUS, Martin
Inventors: THIRY, Gerd, Anton
BÄR, Harald
SCHAUS, Martin
Title: SWITCHING DEVICE FOR A MACHINE
Abstract:
The invention relates to a switching device for a machine, especially a digger, comprising at least one supply connection and one useful connection (P, P') in addition to at least one hydraulic accumulator (10). An on-off valve (12) is arranged between the supply connection (P) and the useful connection (P') and separates the supply connection (P) at least partially from the useful connection (P') in one of the switching positions thereof in addition to ensuring that the hydraulic accumulator (10) is charged on the fluid side via the supply connection (P); in another switching position, the supply connection (P) is connected to the useful connection (P'), whereby the invention offers a substantial improvement with respect to known switching devices and the inventive switching device makes it possible to guarantee an emergency function before the machine is used to perform work.