Abstract: A roller assembly for a rolling door or similar device. The roller comprises a polymer and it has first and second sides, a rolling surface, and an axis around which the roller rolls. The roller also has an interior bore and a shaft rotatably coupled to the roller. One or more ferrules are received within one or both sides of the roller. The ferrules support and align the roller for rotation upon the shaft.

Abstract: A wheel assembly adapted to travel along guide rails or tracks. The assembly includes a roller formed of porous sintered metal, a shaft attached to a supporting body and an adapter to which both the roller and shaft are connected. The adapter includes a cylindrical inner portion with an axial socket to receive the shaft and a cylindrical inner portion of a smaller diameter to define an annular inner shoulder. A spring retainer secures the roller to the adapter.

Abstract: A receiver dryer for an automobile air conditioning system is produced by physically working a metal blank by impact extrusion to form a receptacle with a continuous side wall and an end wall at one end having a relatively thick mounting block included therein. The mounting block is drilled to form access ports for fluid refrigerant. A length of tubing is inserted through the open end of the receptacle and one end thereof is connected to one of the ports. A desiccant bag is also inserted. Then the upper portion of the continuous side wall is physically deformed to close the open end and seal the interior of the receptacle.

Abstract: The invention provides a nut and cap assembly, wherein the nut has relatively flat external side faces symmetrically located about a central axis, the side faces being symmetrical on opposite sides of a central plane perpendicular to the axis of the nut. Each of the side faces has two axially extending slots formed therein on opposite sides of the central plane. The slots are separated at their inner ends by a bridge portion in the respective side face of the nut. The assembly also includes a cap formed of relatively stiff resilient plastic material with a socket formed therein, corresponding generally to the shape of the nut. Each interior side wall of the socket of the cap has a projection extending radially inward and having a ramp portion facing toward the socket opening.

Abstract: A dense body having a projecting radial flange about its middle is used to agitate the contents in a spray can. When the can is shaken, the agitator moves inside the can to mix pigment or other solid particles with a liquid vehicle in the can. The flange around the body reaches into a corner formed by the side and bottom of the can to provide more effective mixing of the contents. The generally rounded shape of the agitator prevents sticking.

Abstract: A method of making a nut adapted for use in combination with a structural member commonly known as "UNISTRUT". The structural member or "UNISTRUT" as in one face, a longitudinal slot bordered by inwardly projecting flanges. The nut has serrations in one face and is positioned in the slot with the serrations in gripping engagement with the edges of the flanges so that a threaded fasting member may extend between the flanges and into the threaded opening into the nut. In accordance with the method of the invention a strip of deformable, hardenable metal is cold rolled to form a plurality of longitudinally extending ridges or serrations and with sufficient force and working to harden the strip. The resulting hardened strip is then cut diagonally into a plurality of nut blanks with hardened serrations in one face. The blanks are then tapped to form a nut adapted for use in a "UNISTRUT" system.