EP 0561153 B1 19951102 - Capacity regulating device for at least two hydrostatic variable displacement pumps.
Title (en)
Capacity regulating device for at least two hydrostatic variable displacement pumps.
Title (de)
Vorrichtung zur Leistungregelung von wenigstens zwei hydrostatischen Verstellpumpen.
Title (fr)
Dispositif de réglage de puissance pour au moins deux pompes hydrostatiques à débit variable.
Publication
Application
Priority
DE 4208925 A 19920319
Abstract (en)
[origin: JPH0617761A] PURPOSE: To provide a power control device with a simple structure and being deliverable from a plant in the form of having a built-in power throttle. CONSTITUTION: A power control device 18 for controlling in a direction of reducing a displacement of variable displacement pumps along a hyperbolic control curve is actuated by control pressures against a pressure difference in a direction of a control position. The pressure difference is generated between a back pressure of a spring device against a first control pressure and a second pressure corresponding to an actuation pressure in an actuation line of another variable displacement hydraulic pump. This pressure difference decreases from a predetermined maximum value till a predetermined minimum value with increase of the second control pressure. The spring device is divided into a first pressure spring 22 and a second pressure spring 30. The first spring device is set to a force corresponding to the minimum value of the pressure difference, and the second spring device is set to a force corresponding to a difference between the maximum value and the minimum value of the pressure difference. The first pressure spring acts on the power control valve with the set force, and the second pressure spring acts on the power control valve at a force decreases with the increase of the second control pressure.
IPC 1-7
IPC 8 full level
F04B 1/08 (2006.01); F04B 1/30 (2006.01); F04B 49/00 (2006.01); F04B 49/08 (2006.01); F04C 11/00 (2006.01); F04C 14/00 (2006.01); F04C 14/02 (2006.01)
CPC (source: EP US)
F04B 49/002 (2013.01 - EP US); F04B 49/08 (2013.01 - EP US); F04B 2201/1203 (2013.01 - EP US); F04B 2203/0208 (2013.01 - EP US); F04B 2205/18 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB IT SE
DOCDB simple family (publication)
DE 4208925 C1 19930603; DE 59300837 D1 19951207; EP 0561153 A1 19930922; EP 0561153 B1 19951102; JP 3526885 B2 20040517; JP H0617761 A 19940125; US 5333997 A 19940802
DOCDB simple family (application)
DE 4208925 A 19920319; DE 59300837 T 19930210; EP 93102076 A 19930210; JP 5884493 A 19930318; US 2562593 A 19930302