EP 0059709 A4 19840427 - TORQUE AND HIGH PRESSURE LIMITING CONTROL FOR VARIABLE DISPLACEMENT PUMPS.
Title (en)
TORQUE AND HIGH PRESSURE LIMITING CONTROL FOR VARIABLE DISPLACEMENT PUMPS.
Title (de)
DREHMOMENT- UND DRUCKSTEUERUNG FÜR PUMPEN MIT EINSTELLBAREM HUBVOLUMEN.
Title (fr)
COMMANDE DE LIMITATION DE COUPLE ET DE HAUTE PRESSION POUR POMPES A DEPLACEMENT VARIABLE.
Publication
Application
Priority
US 8001195 W 19800912
Abstract (en)
[origin: WO8201047A1] It is common practice to provide the servo-system for a variable displacement pump with a "load-plus" valve to maintain pump discharge pressure above a minimum pressure level and above load pressure in a fluid actuator connected to the pump in response to the load pressure in the actuator. Systems of this type are normally lacking in a device for ensuring that the prime mover for the pump functions at maximum efficiency. This invention is directed to a pressure and horsepower limiting valve (24) for ensuring such efficiency by modulating a load pressure signal (P<uL>u) communicated to the "load-plus" valve (23).
IPC 1-7
IPC 8 full level
F16H 61/46 (2010.01); F04B 1/32 (2006.01); F04B 49/08 (2006.01); F16H 61/4148 (2010.01); F16H 61/478 (2010.01)
CPC (source: EP)
F04B 1/324 (2013.01); F04B 49/08 (2013.01)
Citation (search report)
No further relevant documents disclosed
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
WO 8201047 A1 19820401; BE 888823 A 19811116; DE 3071999 D1 19870903; EP 0059709 A1 19820915; EP 0059709 A4 19840427; EP 0059709 B1 19870729; JP S57501393 A 19820805
DOCDB simple family (application)
US 8001195 W 19800912; BE 204803 A 19810515; DE 3071999 T 19800912; EP 81901178 A 19800912; JP 50152181 A 19800912