Global Patent Index - EP 1099859 A2

EP 1099859 A2 2001-05-16 - Method of pressure-balancing hydraulic motors for driving the raise and lower cables of a cable crane

Title (en)

Method of pressure-balancing hydraulic motors for driving the raise and lower cables of a cable crane

Title (de)

Verfahren zum Druckausgleich in Hydraulikmotoren zum Antrieb der Hub- und Schliessseile eines Seilkranes

Title (fr)

Procédé pour équilibrer la pression dans les moteurs hydrauliques d'actionnement pour les cables pour hausser et abaisser d'une grue à cables

Publication

EP 1099859 A2 (DE)

Application

EP 00250337 A

Priority

DE 19955750 A

Abstract (en)

The method involves detecting (6,7) the working pressure in the working circuit of each hydraulic motor (4,5) during the initiation of the closing movement and controlling it via a controller so that the same working pressure exists in both working circuits at the end of the gripper closing process. The arrangement has a sensor in the hydraulic line leading to each sensor. Independent claims are also included for the following: an arrangement for pressure equalization in hydraulic motors for driving the lifting and gripper closing cables of a cable crane.

Abstract (de)

Die Erfindung betrifft ein Vefahren und eine Vorrichtung zum Druckausgleich in den umsteuerbaren Hydraulikmotoren zum Antrieb der Hub- und Schließseile eines Seilkranes mit einem Greifer zum Aufnehmen von Schüttgut, wobei der den vorzugsweise zwei Hubseilen zugeordnete Hydraulikmotor und der den vorzugsweise zwei Schließseilen zugeordnete Hydraulikmotor jeweils über Druckleitungen mit einer gemeinsamen Druckmittelquelle verbunden sind. Hierbei ist in jede zu dem jeweiligen Hydraulikmotor (4,5) führende Druckleitung ein Sensor (6,7) zur Erfassung des dort anstehenden Arbeitsdruckes eingesetzt, wobei zur Verarbeitung der den erfaßten Arbeitsdruck repräsentierenden Signale die Sensoren (6,7) mit einer Steuereinheit (3) verbunden sind, die ihrerseits mit einem Steuerblock (2) in Verbindung steht, über den die Arbeitsdrücke in den zu dem jeweiligen Hydraulikmotor (4,5) führenden Druckleitungen ausgleichbar sind. <IMAGE>

IPC 1-7 (main, further and additional classification)

F15B 21/04; B66C 23/00

IPC 8 full level (invention and additional information)

B66C 3/12 (2006.01); B66D 1/44 (2006.01); F15B 21/04 (2006.01)

CPC (invention and additional information)

B66D 1/44 (2013.01); B66C 3/125 (2013.01); F15B 21/047 (2013.01)

Citation (applicant)

None

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

EP 1099859 A2 20010516; EP 1099859 A3 20031112; EP 1099859 B1 20050518; AT 295943 T 20050615; DE 19955750 A1 20010531; DE 19955750 B4 20040527; DK 1099859 T3 20050919; ES 2243198 T3 20051201; PT 1099859 E 20050930; US 6619626 B1 20030916

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