EP 1101039 A1 20010523 - HYDRO-TRANSFORMER
Title (en)
HYDRO-TRANSFORMER
Title (de)
HYDRO-TRANSFORMATOR
Title (fr)
HYDROTRANSFORMATEUR
Publication
Application
Priority
- DE 9902238 W 19990720
- DE 19835676 A 19980806
- DE 19844648 A 19980929
Abstract (en)
[origin: US6499295B1] The present invention relates to a hydro-transformer including a hydraulic machine, a switching valve and a control means. A work port of the switching valve, which may optionally be connected hydraulically with a pressure port of the switching valve or a drain port of the switching valve, is connected with a first port of the hydraulic machine. The second port of the hydraulic machine is in hydraulic connection with a drive member. The switching valve is driven by the control means in response to a signal characterizing the volume flow into the hydraulic machine. Where the driver member is a cylinder, its extension may be carried out at a constant velocity and independently of a load, and energy may be recovered upon retraction. Due to the provision of a further switching valve between the second part of the hydrostatic motor and the drive member, a higher pressure may be generated at the drive member in the presence of a low pressure at the pressure port of the switching valve.
IPC 1-7
IPC 8 full level
F15B 1/02 (2006.01); F15B 11/028 (2006.01); F15B 11/05 (2006.01); F15B 21/08 (2006.01); F15B 21/14 (2006.01)
CPC (source: EP US)
F15B 1/02 (2013.01 - EP US); F15B 11/055 (2013.01 - EP US); F15B 21/087 (2013.01 - EP US); F15B 21/14 (2013.01 - EP US); F15B 2211/212 (2013.01 - EP US); F15B 2211/214 (2013.01 - EP US); F15B 2211/30525 (2013.01 - EP US); F15B 2211/3059 (2013.01 - EP US); F15B 2211/3122 (2013.01 - EP US); F15B 2211/6313 (2013.01 - EP US); F15B 2211/632 (2013.01 - EP US); F15B 2211/6336 (2013.01 - EP US); F15B 2211/665 (2013.01 - EP US); F15B 2211/6654 (2013.01 - EP US); F15B 2211/7052 (2013.01 - EP US); F15B 2211/7058 (2013.01 - EP US)
Citation (search report)
See references of WO 0008339A1
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
US 6499295 B1 20021231; EP 1101039 A1 20010523; EP 1101039 B1 20021211; JP 2002522710 A 20020723; WO 0008339 A1 20000217
DOCDB simple family (application)
US 76218601 A 20010409; DE 9902238 W 19990720; EP 99948659 A 19990720; JP 2000563945 A 19990720