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US 6,267,548 B1Granted
Automatic over center system
AssigneeCase Corporation
InventorsRichard J. Lech, Roger D. Mickelson, Robert E. Wawiorka
Life of this patent
Estimating the term…
Abstract
The present invention is directed to a control circuit for automatically bringing a hydraulically operated work arm into a particular position without having to manually reverse the direction of the hydraulic operating system.
Claims4
In combination with an apparatus having an articulated work arm that is movable to a transport position and a hydraulic operating system therefore, a control circuit comprising:
- a solenoid valve operably connected with the work arm hydraulic operating system;
- a source of electricity for operating the solenoid;
- and
- a switching mechanism electrically connected in series between the electrical source and the solenoid to control operation thereof, said switching mechanism including a manually actuated operator switch and a position actuated switch located remotely from the operator switch in an operative position associated with the work arm and responsive to the position of the work arm so as to connect the electrical source to the solenoid valve when the operator switch is closed and the work arm is at a preselected position.
1 more element
Dependencies are inferred from the claim text.