EP 0179249 A2 19860430 - Hydraulic control.
Title (en)
Hydraulic control.
Title (de)
Hydraulische Steuerung.
Title (fr)
Commande hydraulique.
Publication
Application
Priority
DE 3434014 A 19840915
Abstract (en)
[origin: US4676140A] A hydraulic control system for an elevator or other similar reciprocating user is disclosed, which comprises an adjustable throttle valve and a control or bypass valve disposed in the fluid supply line between the pump and elevator. A pressure difference balance is provided for controlling the operation of the control valve, and the pressure difference balance has one end operatively connected to the pressure provided by the pump, and the other end operatively connected to the pressure in the user or load line. The control valve is thus adapted to maintain a desired pressure difference across the throttle valve which is independent of the load on the user. In addition, the zero setting of the pressure difference balance is adjustable, so as to permit the system to be equally operable in both the upward and downward movements of the elevator.
Abstract (de)
Eine hydraulische Steuerung besitzt eine Drossel (8), die hydraulisch verstellbar ist. Der Ölmengenbedarf wird durch ein Stellventil (9) gesteuert, das durch einen Steuerdruck hydraulisch verstellt wird. Hierzu dient eine Druckwaage (17), die als 3/2 - Wegeventil ausgebildet ist. Die Druckwaage verbindet den Steuerdruckraum des Stellventils in Abhängigkeit von dem Druckabfall an der Drossel entweder mit einem Vorgabedruckkanal oder mit dem Tank.
IPC 1-7
IPC 8 full level
B66B 1/04 (2006.01); F15B 11/05 (2006.01); G05D 7/00 (2006.01)
CPC (source: EP US)
B66B 1/24 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI NL SE
DOCDB simple family (publication)
US 4676140 A 19870630; AT E51089 T1 19900315; CA 1243585 A 19881025; DE 3434014 A1 19860320; DE 3576584 D1 19900419; DK 167863 B1 19931227; DK 410485 A 19860316; DK 410485 D0 19850910; EP 0179249 A2 19860430; EP 0179249 A3 19870930; EP 0179249 B1 19900314; JP H0615881 B2 19940302; JP S61112801 A 19860530
DOCDB simple family (application)
US 77544085 A 19850912; AT 85111444 T 19850910; CA 490527 A 19850912; DE 3434014 A 19840915; DE 3576584 T 19850910; DK 410485 A 19850910; EP 85111444 A 19850910; JP 20319585 A 19850913