Material or article handling – Vertically swinging load support – Shovel or fork type
Reexamination Certificate
2005-12-02
2008-11-25
Underwood, Donald (Department: 3652)
Material or article handling
Vertically swinging load support
Shovel or fork type
C037S468000, C091S426000
Reexamination Certificate
active
07455494
ABSTRACT:
A control circuit for an attachment mounting device that has a closed position for securing an implement and an opened position for releasing an implement. The control circuit includes at least one hydraulic actuator, a control valve and an auto-close feature. The control valve has at least a first energized position and a second energized position. The first energized position applies pressurized fluid to the at least one hydraulic actuator to actuate the attachment mounting device into the closed position. The second energized position applies pressurized fluid to the at least one hydraulic actuator to actuate the attachment mounting device into the opened position. The auto-close feature is configured to be activated after the control valve is in the first energized position and is configured to be deactivated after the control valve is in the second energized position.
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PCT/US2006/045582 International Search Report dated Sep. 13, 2007.
Clark Equipment Company
Farrell Leanne Taveggia
Underwood Donald
Westman Champlin & Kelly P.A.
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