Title:
CONTROL VALVE OPERATING DEVICE
Document Type and Number:
Japanese Patent JP2007040342
Kind Code:
A
Abstract:
To provide a structure for automatically returning an operation lever to a neutral position without increasing the control force of the operation lever.
In this control valve operating device 100 in which flow channels of a control valve 15 are switched in interlocking with the motion of the operation lever 65, a spool 30 internally inserted into a casing of the control valve 15 in a state of being vertically slidable is vertically moved by the rotation of a switching shaft 44, the operation lever 65 is provided with a coil spring 69 for energizing the spool 30 to return to the neutral position, and further the switching shaft 44 is provided with a counter weight 53 against the self-weight of the spool 30.
Inventors:
NISHIKAWA KOTARO
HIROTA MICHINOBU
HIROTA MICHINOBU
Application Number:
JP2005223103A
Publication Date:
February 15, 2007
Filing Date:
August 01, 2005
Export Citation:
Assignee:
KAWASAKI PRECISION MACH LTD
International Classes:
F16K31/44; F16K31/60; G05G1/04; G05G5/05
Attorney, Agent or Firm:
Yoshihiro Tsunoda
Yasu Furukawa
Toshio Nishitani
Keiji width
Yu Nakao
Yasu Furukawa
Toshio Nishitani
Keiji width
Yu Nakao
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