Drill rig
AssigneeDiamond Products Joint Venture
InventorKarl H. Moller
Life of this patent
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Abstract
In a preferred embodiment the core drilling rig of the present invention includes a base, a vertically extending mast, a movable carriage mounted on the mast, an electric powered motor for rotatably driving a core drill bit, and a control system for controlling the supply of electric power to the drive motor. The control system includes a motion sensitive device for detecting the unwanted movement of the base and suspending the supply of electric power to the motor.
Claims14
A drill rig for supporting and driving a core drill bit for drilling openings in concrete and related materials, said drill rig comprising a base, a vertically extending mast, a movable carriage mounted on the mast, an electric powered motor for rotatably driving a core drill bit and a control system for controlling the supply of electric power to said motor, said control system including a motion sensitive device for sensing the unwanted movement of said base and suspending the supply of electrical power to said motor.
Dependencies are inferred from the claim text.