Patent ID: 6347782
Filing Date: 2002-02-19
Classification: F16K,Y10T

Abstract:
An axial actuator to actuate a valve by turning the shaft of such valve, comprising:an outer enclosure forming an interior space; an inner enclosure within the interior space of the outer enclosure; a piston linearly movable within the interior space of the outer enclosure to divide the interior space into two chambers, one chamber including the inner enclosure, said piston having racks extending therefrom; a rotation device positioned at least partially within the inner enclosure and adapted to be secured to the shaft of the valve to be rotated by the actuator, said rotation device including a bevel gear having a hub adapted to receive the shaft of the valve to be rotated by the device; and interconnection structure supported by the inner enclosure interconnecting the movable piston and the rotation device to cause rotational movement of the rotation device upon linear movement of the piston within the interior space, said interconnection structure including mating compound pinion gears each having a bevel pinion gear and a spur pinion gear, each said compound pinion gear being positioned so that the bevel pinion ,ear mates with the rotation device bevel gear and the spur pinion gear mates with one of the racks extending from the piston.