Title:
CONTROL VALVE, DERRICKING CYLINDER AND OPERATION METHOD THEREOF, AND HIGH LIFT WORKBENCH
Document Type and Number:
Japanese Patent JP2021042075
Kind Code:
A
Abstract:
To provide a control valve, a derricking cylinder and an operation method thereof, and a high lift workbench that prevent accidents from occurring due to the failure of the balance valve and rodless cavity of the derricking cylinder.SOLUTION: There are provided a control valve, a derricking cylinder and an operation method thereof, and a high lift workbench for the field of elevated work. The control valve of the derricking cylinder includes a first balance valve provided in an oil circuit between a first port G and a second port F, and a second balance valve provided in an oil circuit between a third port H and a fourth port E. A switch valve arranged in series with the first balance valve is further provided in the oil circuit between the first port G and the second port F.SELECTED DRAWING: Figure 7
Inventors:
XU SHUGEN
Application Number:
JP2020008823A
Publication Date:
March 18, 2021
Filing Date:
January 23, 2020
Export Citation:
Assignee:
ZHEJIANG DINGLI MACHINERY CO
International Classes:
B66F9/22; B66F11/04
Domestic Patent References:
| JP2001240385A | 2001-09-04 | |||
| JPH06271297A | 1994-09-27 | |||
| JP2002087788A | 2002-03-27 |
Attorney, Agent or Firm:
Tomokazu Adachi
Atsuko Miura
Atsuko Miura