Abstract: A rotary-to-linear motion actuator having helical bevel gear and methods of use thereof are described. The actuator may be utilized with an apparatus for managing a fluid flow passage between one or more input ports and output ports. A pinion gear engages, and during operation turns, a bevel ring gear arranged on a helical path along an external periphery of a sleeve retaining a seat, which forms a fixed orifice. The teeth of the bevel gear are arranged on the helical path at the same pitch as external threads on the sleeve, which in turn, engage internal threads in a thrust tube. The trust tube is engaged with a thrust tube jam nut that locks the thrust tube into position within the valve body. The area of the flow passage is changed by movement of the fixed seat orifice axially with respect to a contoured plug assembly. The threads of the sleeve and the thrust tube resist axial load imparted by the pressure drop across at the fixed orifice.

Abstract: A rotary-to-linear motion actuator having helical bevel gear and methods of use thereof are described. The actuator may be utilized with an apparatus for managing a fluid flow passage between one or more input ports and output ports. A pinion gear engages, and during operation turns, a bevel ring gear arranged on a helical path along an external periphery of a sleeve retaining a seat, which forms a fixed orifice. The teeth of the bevel gear are arranged on the helical path at the same pitch as external threads on the sleeve, which in turn, engage internal threads in a thrust tube. The trust tube is engaged with a thrust tube jam nut that locks the thrust tube into position within the valve body. The area of the flow passage is changed by movement of the fixed seat orifice axially with respect to a contoured plug assembly. The threads of the sleeve and the thrust tube resist axial load imparted by the pressure drop across at the fixed orifice.

Abstract: A rotary-to-linear motion actuator having helical bevel gear and methods of use thereof are described. The actuator may be utilized with an apparatus for managing a fluid flow passage between one or more input ports and output ports. A pinion gear engages, and during operation turns, a bevel ring gear arranged on a helical path along an external periphery of a sleeve retaining a seat, which forms a fixed orifice. The teeth of the bevel gear are arranged on the helical path at the same pitch as external threads on the sleeve, which in turn, engage internal threads in an apparatus body. The area of the flow passage is changed by movement of the fixed seat orifice axially with respect to a contoured plug assembly. The threads of the sleeve and the body resist axial load imparted by the pressure drop across at the fixed orifice.

Abstract: A rotary-to-linear motion actuator having helical bevel gear and methods of use thereof are described. The actuator may be utilized with an apparatus for managing a fluid flow passage between one or more input ports and output ports. A pinion gear engages, and during operation turns, a bevel ring gear arranged on a helical path along an external periphery of a sleeve retaining a seat, which forms a fixed orifice. The teeth of the bevel gear are arranged on the helical path at the same pitch as external threads on the sleeve, which in turn, engage internal threads in an apparatus body. The area of the flow passage is changed by movement of the fixed seat orifice axially with respect to a contoured plug assembly. The threads of the sleeve and the body resist axial load imparted by the pressure drop across at the fixed orifice.

Abstract: An automatic, pneumatic reel latch, comprising a hub adapted to be attached to a drive shaft of a tape deck, the hub has an annular groove forming an inner cylindrical surface and an outer thin cylindrical shell. A cup-shaped piston is fitted with a rolling diaphragm and inserted into the groove. A plurality of tapered flats are molded on the outer surface of the piston. Compressed air is supplied through an axial bore in the drive shaft, into the cylinder, causing the piston to move out of the groove, and by cam action of the lands, move outwardly a plurality of roller friction pad assemblies, having friction pads on their outer surfaces. A tape reel is adapted to slide over the latch and to be outside of, and co-planar with, the friction pads. The pneumatic pressure of the piston will force the friction pads into contact with the reel, providing sufficient friction to drive the reel in synchronism with the hub.