EP 0149787 A3 19850821 - TORQUE CONTROLLING DEVICE FOR A VARIABLE HYDROPUMP
Title (en)
TORQUE CONTROLLING DEVICE FOR A VARIABLE HYDROPUMP
Publication
Application
Priority
- DE 3345264 A 19831214
- DE 8335902 U 19831214
Abstract (en)
[origin: US4668171A] A torque control device for an adjustable hydropump is described which is based on an output control device in which the output control is determined as a function of the output pressure of the hydropump and a pressure in a working pressure control line. For this purpose a torque valve is provided whose closure power is determined by a measuring spring or set of springs connected with the pump control member and pretensioned depending on the output setting. The torque valve connects the working pressure control line with the pressureless outlet depending on the pressure in the working pressure control line and the pretension of the measuring spring. The torque valve can be fixed on to the hydropump as a separate unit and the control characteristic can be changed from outside by adjustment of the measuring spring.
IPC 1-7
IPC 8 full level
F04B 49/00 (2006.01); F04B 1/32 (2006.01); F04B 49/08 (2006.01); F15B 11/00 (2006.01)
CPC (source: EP US)
F04B 1/324 (2013.01 - EP US); F04B 49/08 (2013.01 - EP US)
Citation (search report)
- [Y] FR 2211054 A5 19740712 - SPERRY RAND CORP [US]
- [Y] FR 1318661 A 19630222 - SCIPER SA
- [A] GB 2104250 A 19830302 - BOSCH GMBH ROBERT [DE]
- [A] US 3941513 A 19760302 - MALOTT THOMAS J
Designated contracting state (EPC)
DE FR GB IT SE
DOCDB simple family (publication)
EP 0149787 A2 19850731; EP 0149787 A3 19850821; EP 0149787 B1 19870506; EP 0149787 B2 19911002; DE 3345264 A1 19850627; DE 8335902 U1 19870604; JP H0526955 B2 19930419; JP S60147588 A 19850803; US 4668171 A 19870526
DOCDB simple family (application)
EP 84115198 A 19841212; DE 3345264 A 19831214; DE 8335902 U 19831214; JP 26309384 A 19841214; US 68192084 A 19841214