Abstract: A rotary valve for fluid flow control is provided having curved sealing surfaces, at least one of which has a cross-sectional arc segment forming a portion of an involute, for a valve closure member and a fluid port valve seat or seating surface. By machining the sealing surfaces of the valve closure member and of the valve seat to the form of an involute, these surfaces will engage substantially simultaneously over the entire perimeter of the valve seat at initial closing contact and closed or sealed positions. After initial contact and during overclosure, if elastomeric surfaces are used, the compression and sealing of resilient seating material will be uniform over the entire engaging surface, and around the periphery of the valve seat.

Abstract: An electric motor having a cage pivotally mounted at one end to a post interior a housing by a first bearing and at its other end by a second bearing between the exterior of the cage and the interior of the housing. A first stator is mounted to the interior of the cage and has an output shaft and first rotor interior thereto. A second rotor is mounted to the exterior of the cage and interior a second stator which is mounted interior the housing. The second stator is driven with a control signal which is a function of the measure reaction torque experienced by the first stator to produce a counter torque to balance the reaction torque. A consistency transmitter mounted on the output shaft produces torque on the first stator as a function of the consistency of the material in which it is rotated.

Abstract: An electric motor having a first rotor on an output shaft, a first stator pivotally mounted to a housing, a second rotor mounted to the first stator and a second stator mounted to the housing. The second stator is driven with a control signal which is a function of the measure reaction torque experienced by the first stator to produce a counter torque to balance the reaction torque. A consistency transmitter mounted on the output shaft produces torque on the first stator as a function of the consistency of the material in which it is rotated.

Abstract: A mechanical movement is provided for converting between linear and rotational movement and includes a frame adapted to move only along a linear path of travel. A first rotatable member is adapted to bear against the frame in such a manner that the first rotatable member is free to rotate with respect to the frame. A second rotatable member is adapted to bear against the first rotatable member in such a manner that the second rotatable member is free to rotate with respect to the first rotatable member in an eccentric fashion. A third rotatable member is affixed to the second rotatable member and is adapted to rotate therewith about a fixed axis. Means are provided for minimizing the sideward thrust on the first and second rotatable members so that linear movement of the frame will be converted to rotational movement of the third rotatable member and so that rotational movement of the third rotatable member will be converted to linear movement of the frame.

Abstract: A device is provided having means for defining a fluid passage which include an inlet section, a throat section, and an outlet section. The fluid passage decreases in size in the inlet section and increases in size in the outlet section. A plurality of flexible members extend axially along the entire length of the fluid passage and extend radially outwardly from the means defining the fluid passage. Means are provided for adjusting the radial position of the flexible members to vary the size of the fluid passage.

Abstract: An improved scotch yoke has a means for absorbing sideward thrust. It includes a rod extending in a first direction through a hole in the yoke housing. A yoke arm in the housing is pivotable about an axis and extends in a second direction that intersects the first direction. Projection means, preferably on a member on the rod, extend through a slot in the yoke arm to link the rod with a means for absorbing sideward thrust to minimize bowing and twisting in the yoke arm and the rod. Movement of the rod slides the member in the first direction and pivots the yoke arm about the axis.

Abstract: An improved scotch yoke has a means for absorbing sideward thrust. It includes a rod extending in a first direction through a hole in the yoke housing. A yoke arm in the housing is pivotable about an axis and extends in a second direction that intersects the first direction. Projection means, preferably on a member of the rod, extend through a slot in the yoke arm to link the rod with a means for absorbing sideward thrust to minimize bowing and twisting in the yoke arm and the rod. Movement of the rod slides the member in the first direction and pivots the yoke arm about the axis.

Abstract: An improved scotch yoke has a means for absorbing sideward thrust. It includes a rod extending in a first direction through a hole in the yoke housing. A yoke arm in the housing is pivotable about an axis and extends in a second direction that intersects the first direction. Projection means, preferably on a member on the rod, extend through a slot in the yoke arm to link the rod with a means for absorbing sideward thrust to minimize bowing and twisting in the yoke arm and the rod. Movement of the rod slides the member in the first direction and pivots the yoke arm about the axis.

Abstract: A pump check valve control apparatus includes a pump for delivering a fluid to a system. A valve between the pump and the system controls the delivery of the fluid to the system. A valve actuator, signalled by an actuator control, begins to open the valve when the pressure on the pump side of the valve substantially equals the system pressure. During the opening cycle of the valve, a substantially constant pressure is maintained in the system. The actuator control closes the valve so that flow through the valve ceases when the pressure differential across the valve is substantially zero.