Title:
OIL REPLENISHMENT SYSTEM IN BALANCING OIL LINE FOR HORIZONTAL LEVEL LUFFING CRANE JIB
Document Type and Number:
Japanese Patent JP3845069
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a simple, reliable and low-cost system for automatically or manually correcting the lack of interlocking between a sub-arm and a counterweight balancing beam caused by a leakage in an oil line.
SOLUTION: A pressure oil supply line 13 connects a pressure oil supply pump 11 to a hydraulic balancing pipe 9, and a solenoid valve 15 is fitted to the oil line 13. Position detectors 17, 18 are installed at a sub-arm and a main arm, near the connection of a counterweight balancing beam 5. In the case of detecting the sub-arm 4 to be in a hanging-down position before detecting the counterweight balancing beam 5 to be in a perpendicular position, a logic controller 16 controls the operation of the solenoid valve 14 to replenish a hydraulic cylinder 8 with pressure oil to put the balancing beam 5 into a perpendicular position.
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Inventors:
Garego Antoine
Application Number:
JP2003087745A
Publication Date:
November 15, 2006
Filing Date:
March 27, 2003
Export Citation:
Assignee:
S.M.S. SYNERGIE MANAGEMENT SYSTEME
International Classes:
B66C23/76; B66C23/10; B66C23/72; (IPC1-7): B66C23/72; B66C23/10
Domestic Patent References:
| JP59143893A | ||||
| JP63004996U | ||||
| JP57033040Y1 | ||||
| JP62008300U |
Attorney, Agent or Firm:
Tetsuo Hirose
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