Title:
ANTITHEFT DEVICE OF WORKING MACHINE
Document Type and Number:
Japanese Patent JP3946550
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide an inexpensive antitheft device of a working machine which does not require any complicated electric circuit.
SOLUTION: In an on-vehicle crane having a hydraulic pump operated by an engine, a hydraulic actuator operated by pressure oil discharged from the hydraulic pump, and a control valve to control the flow of the pressure oil fed to the hydraulic actuator from the hydraulic pump, a hydraulic circuit of the crane comprises an unload valve which can unload the pressure oil fed to the hydraulic actuator from the hydraulic pump, and a solenoid valve 31 for unloading operation to unload the unload valve, and an antitheft switch S6 is provided on a solenoid valve control line 40 to control the solenoid valve 31 for unloading, operation. When a vehicle is stored, the crane is set in a condition to prevent the vehicle from traveling, the solenoid valve 31 is operated by the antitheft switch S6, and the unload valve performs the unloading operation when an engine key switch is turned on.
More Like This:
| JP5024258 | Driver assistance device |
| JP4379010 | Locking device |
| JP5077112 | Auto lock system |
Inventors:
Jiro Kanazawa
Application Number:
JP2002063731A
Publication Date:
July 18, 2007
Filing Date:
March 08, 2002
Export Citation:
Assignee:
Furukawa Metal Co., Ltd.
International Classes:
B60R25/01; B60K25/00; B60R25/21; B66C23/36; (IPC1-7): B60R25/00; B60K25/00; B66C23/36
Domestic Patent References:
| JP2000255382A | ||||
| JP60073901U | ||||
| JP10338495A |
Attorney, Agent or Firm:
Tetsuya Mori
Yoshiaki Naito
Cui Shu Tetsu
Tadayuki Miyazaki
Yoshiaki Naito
Cui Shu Tetsu
Tadayuki Miyazaki