Abstract: Combination linear and rotary actuators are disclosed. The linear and rotary actuators have a housing defining a cylindrical interior space and a pair of pistons located inside the cylindrical interior space. An inner bearing cylinder is provided that has spaced-apart ball bearings arranged in a helical pattern on its surface that engage with a structure having an inner surface with helical grooves therein. The structure at least indirectly engages a linear drive piston that is slidably mounted in the housing, and provides rotational movement thereto. The linear drive piston has an input shaft that has ball bearings on its surface, and is inserted inside the output shaft of a revolution piston that has an inner surface with linear grooves. The actuators use hydrostatically charged integral bearing races that activate during operation to reduce friction. Combination linear and rotary actuators with double actuation output shafts are also provided.

Abstract: Combination linear and rotary actuators are disclosed. The linear and rotary actuators have a housing defining a cylindrical interior space and a pair of pistons located inside the cylindrical interior space. An inner bearing cylinder is provided that has spaced-apart ball bearings arranged in a helical pattern on its surface that engage with a structure having an inner surface with helical grooves therein. The structure at least indirectly engages a linear drive piston that is slidably mounted in the housing, and provides rotational movement thereto. The linear drive piston has an input shaft that has ball bearings on its surface, and is inserted inside the output shaft of a revolution piston that has an inner surface with linear grooves. The actuators use hydrostatically charged integral bearing races that activate during operation to reduce friction. Combination linear and rotary actuators with double actuation output shafts are also provided.

Abstract: Valves, the components used to create valves and, more particularly, to piston-activated cartridge valves are disclosed. The valves include cartridge valve assemblies having a housing and a slidable member, the major part of which is located within the internal space of the housing. One end of the slidable member extends outward beyond the second end of the cartridge housing, and can be contacted by an actuator piston to open the valve. The interior surface of the cartridge housing and the sides of the slidable member are configured so that when the slidable member is in the open position, at least one fluid flow path is provided between the first and second openings of the cartridge housing so that fluid can flow either: (a) from the first opening to the second opening; or (b) from the second opening to the first opening.

Abstract: A rigging device includes an eccentric sleeve having a generally cylindrical shape and an eccentric bore disposed at an offset distance from a centerline of the eccentric sleeve. A pin has a shaft and a head disposed at a first end of the shaft and a retaining feature disposed at a second end of the shaft. The shaft is disposed within the eccentric bore. A lifting lug is realeasably mated to the shaft and disposed between the eccentric sleeve and the retaining feature.