Login| Sign Up| Help| Contact|

Patent Searching and Data

Document Type and Number:
Japanese Patent JP2000508409
Kind Code:
The invention relates to a safety circuit for controlling a hydraulic drive (10) with a drive part (12) movable in at least two different directions of movement and controllable for any movement by a control switching circuit. A safety circuit which ensures the required safety function in an absolutely safe manner, even in the event of a power failure, is obtained in that at least one safety switching circuit is hydraulically combined with the control switching circuit in such a manner that when the latter is switched off the drive part (12) can only be controlled by the respective safety switching circuit. Consequently, the highest-priority operation provided in an emergency, for example in the form of the defined closing or opening of a vapour control valve, is safely executed and the otherwise usual control process is interrupted by the control switching circuit.

More Like This:
Bleats, Wolfgang
Hertzzi, Reinel Hans
Application Number:
Publication Date:
July 04, 2000
Filing Date:
January 17, 1997
Export Citation:
Click for automatic bibliography generation   Help
High Duck Technology Gezel Shaft Mitt Beschlenktel Haftung
International Classes:
F01D21/18; F15B20/00; (IPC1-7): F15B20/00
Attorney, Agent or Firm:
Takashi Ishida (4 others)