Patent ID: 7028705

Claim:
A valve operator for moving a moveable valve element, with respect to a stationary valve frame, between connect and disconnect positions of the valve element, wherein in said connect position said valve element connects a source that supplies a high pressure fluid to a device, and in said disconnect position said valve element does not connect said source of high pressure fluid to said device, comprising: first and second energizable gear motors that have respective first and second driving members for moving said valve element, and a control for operating each of said gear motor to move the corresponding driving member from an initial position to an operating position and then immediately thereafter back to said initial position; in said operating position of said first driving member said first driving member positions said valve element in said connect position, in said operating position of said second driving member said second driving member positions said valve element in said disconnect position, and in initial positions of said first and second driving members said driving members are each positioned to allow said valve element to be moved between said connect and disconnect positions, whereby said moveable valve element can be moved to a different one of said positions when one of said motors is not energized.