Abstract: A lug nut dispenser including a housing having an interior wall defining an elongate chamber for receiving lug nuts therein, an exterior wall, an upstream end for releasably receiving a drive impact tool, and a downstream end defining a port communicating with the chamber for permitting consecutive release and ejection of the lug nuts therethrough. A displacer ring is carried on the exterior walls of the housing and slides relative thereto. A displacer is connected to the ring and extends through a slot defined by and extending through the housing into the chamber. The displacer slides along the slot for moving the nuts downstream. The displacer includes a shoulder for engaging a nut positioned in the chamber for permitting sequential, axially-aligned movement of the nuts through the chamber. There are also at least two spaced-apart, flexible detent arms. Each arm has first and second ends. The second end includes a tip and is moveable between nut-retaining and nut-dispensing positions.

Abstract: A cryogenic refrigeration apparatus that re-liquifies boiled off cryogenic gases and returns the cooled, re-liquified gases to the cryogenic load. Reciprocation of a driver piston effects simultaneous and corresponding reciprocation of compressor and expander pistons. A magnetic sensor senses the position of the driver piston when at its top dead center position, its bottom dead center position, and a position about half way therebetween. Signals corresponding to the sensed position of the driver piston are sent to a logic control unit that governs the opening and closing of valves throughout the apparatus.