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Vehicle mountable arm for valve operating machine

Image Number 5 for United States Patent #8025078.

A valve operating device includes a mounting for attachment to a vehicle and an elongate arm, the free end of which is only moveable in a plane parallel to the ground. The joints of the arm pivot around vertical axes and the arm is locked into a desired orientation by a brake at each joint. A valve turning machine is at the free end of the arm. The brakes are engaged and released by a control on the valve turning machine.

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