EP 0756574 A1 19970205 - A DEVICE FOR DAMPING UNDESIRABLE OSCILLATIONS IN A CRANE MEMBER
Title (en)
A DEVICE FOR DAMPING UNDESIRABLE OSCILLATIONS IN A CRANE MEMBER
Title (de)
VORRICHTUNG ZUM DÄMPFEN VON UNGEWÜNSCHTEN SCHWINGUNGEN IN EINEM KRANELEMENT
Title (fr)
DISPOSITIF D'AMORTISSEMENT D'OSCILLATIONS INDESIRABLES DANS UN ELEMENT DE GRUE
Publication
Application
Priority
- SE 9500375 W 19950407
- SE 9401369 A 19940422
Abstract (en)
[origin: WO9529118A1] The present invention relates to a device for damping undesirable oscillations of a crane member (1) which is pivotally movable by means of at least one hydraulic motor (5, 5'). The hydraulic circuit (8) has a restriction (13) co-operating with a circuit-closing device (14; 18) the purpose of the restriction being to convert energy inherent in the system to heat in the hydraulic oil. The device includes means (14, 15, 16, 16') for controlling the closing device (14; 18) according to instantaneous conditions and/or changes or conditions, such as pressure and/or flow, in the hydraulic circuit (8). The energy-converting action of the restriction (13) is instantaneously activated as soon as a certain condition and/or a certain change of condition occurs. The conduit (12) in which the restriction (13) lies is completely shut off, rendering flow of oil through the restriction impossible, as long as the energy-converting action of the restriction is not called for.
IPC 1-7
IPC 8 full level
B66C 13/06 (2006.01); B66C 23/86 (2006.01)
CPC (source: EP)
B66C 13/06 (2013.01); B66C 13/063 (2013.01); B66C 23/86 (2013.01); F15B 2211/6313 (2013.01); F15B 2211/8616 (2013.01)
Citation (search report)
See references of WO 9529118A1
Designated contracting state (EPC)
AT DE IT
DOCDB simple family (publication)
WO 9529118 A1 19951102; AT E202324 T1 20010715; AU 2354395 A 19951116; DE 69521423 D1 20010726; DE 69521423 T2 20020502; EP 0756574 A1 19970205; EP 0756574 B1 20010620; SE 505698 C2 19970929; SE 9401369 D0 19940422; SE 9401369 L 19951023
DOCDB simple family (application)
SE 9500375 W 19950407; AT 95917527 T 19950407; AU 2354395 A 19950407; DE 69521423 T 19950407; EP 95917527 A 19950407; SE 9401369 A 19940422