Hydraulic actuation device
AssigneeKabushiki Kaisha Ogura
InventorKiyoshi KIMURA
Life of this patent
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Abstract
A hydraulic actuation device includes a tool, an actuation part having a pressure oil supply mechanism configured to send pressure oil from an oil chamber to the tool and return return oil from the tool to the oil chamber, an operation handle for adjusting oil passages for the pressure oil and the return oil in the pressure oil supply mechanism and configured to be able to be moved from an initial position, and biasing means configured to bias the operation handle toward the initial position when no external force is applied to the operation handle. When the operation handle moves from the initial position, the tool is actuated by the actuation part. When the operation handle is returned to the initial position by the biasing means, operation of the tool by the actuation part is stopped.
Claims9
A hydraulic actuation device comprising:
- a tool;
- an actuation part having a pressure oil supply mechanism configured to send pressure oil from an oil chamber to the tool and return oil from the tool to the oil chamber;
- an operation handle for adjusting oil passages for the pressure oil and the return oil in the pressure oil supply mechanism, the operation handle being configured to be able to be moved from an initial position;
- and
- biasing means configured to bias the operation handle toward the initial position when no external force is applied to the operation handle, wherein
- when the operation handle moves from the initial position, the tool is actuated by the actuation part, and
- when the operation handle is returned to the initial position by the biasing means, operation of the tool by the actuation part is stopped.
Dependencies are inferred from the claim text.