Patent ID: 8025078

Claim:
A valve operating device comprising a mounting for retaining said device to a vehicle, an arm having a first end and a second end, a valve operating machine attached to said second end of said arm, said attachment between said second end and said valve operating machine being non-rotatable about a longitudinal axis of said arm and not pivotable about an axis, located at said second end of said arm, perpendicular to said longitudinal axis of said arm, said first end of said arm attached to said mounting, and only moveable with respect to said mounting by a pivot rotatable about a vertical axis wherein said valve operating machine at said second end of said arm is only moveable through a plane parallel to an underlying ground, a hydraulically operated brake at said pivot for selectively locking and unlocking said arm into a fixed angular orientation with respect to said mounting, a control for controlling the application and the release of said lock, and said control positioned at said second end of said arm.