Abstract: A cover for a napkin dispenser includes an elongated dispensing aperture having a major and a minor axis. The cover also includes a pair of support members disposed on an inner surface of the cover on opposing sides of the elongated dispensing aperture. Each of the support members includes a central portion and the height of at least a portion of the central portion relative to the inner surface generally increases as a distance between the elongated dispensing aperture and the central portion increases.

Abstract: A pinch roller assembly for a sheet product dispenser includes a roller body and a plurality of clips. The roller body includes a plurality of grooves. The roller body is rotatably associated with the plurality of clips, each clip being disposed in one of the plurality of grooves.

Abstract: A pump has a pump assembly for pumping fluid. The pump assembly includes a fluid pressure changing mechanism in fluid communication with a valve plate which is in fluid communication with a port plate. A pair of flappers are interposed between and sealable with the valve plate and port plate. A head has a head port, and is in sealed engagement with the port plate, so that, in cooperation with the port plate and the valve plate, the flappers control fluid flowing through the head port and to and from the fluid pressure changing mechanism. Rotation of the port plate and valve plate relative to the head reverses flow of the fluid through the head port.

Abstract: A connecting rod including a generally vertical oriented rod section having a piston end and a connecting end. A non-through bore formed in the connecting end receives a pin mounted eccentrically on a shaft, such that rotation of the shaft causes the rod section to reciprocate. An axial groove formed in the bore allows air in the bore to escape during assembly. When a lubricant is disposed in the bore, the groove also provides lubrication over the entire length of the pin.

Abstract: A connecting rod including a generally vertical oriented rod section having a piston end and a connecting end. A non-through bore formed in the connecting end receives a pin mounted eccentrically on a shaft, such that rotation of the shaft causes the rod section to reciprocate. A bleed hole formed in an inside end of the bore allows air in the bore to escape during assembly. When a lubricant is disposed in the bore, the bleed hole is shaped to inhibit an excess amount of lubricant from escaping therethrough.

Abstract: A compressor assembly including a motor having a rotatable shaft, and a bracket attached to the motor. The bracket has fingers extending substantially perpendicular to the shaft. The fingers having ends with engagement surfaces. A connecting rod has a connecting end eccentrically connected to the shaft, and a piston end received in a cylinder sleeve. The cylinder sleeve is supported by shelves projecting from the fingers and is interposed between the fingers. A valve head member disposed above and in sealed engagement with the cylinder sleeve is interposed between the fingers, and the finger engagement surfaces retain the valve head member in sealed engagement with said cylinder sleeve.

Abstract: A pressure relief valve assembly for relieving fluid pressure in an exhaust outlet includes a deformable fluid passage in fluid communication with the exhaust outlet. The passage is blocked by a poppet disposed in the passage for discouraging fluid firm passing therethrough. A spring disposed in the passage urges the poppet against the fluid, and a knob having external buttress threads is disposed in the passage to compress the spring. The knob compresses the spring to prevent fluid below a predetermined pressure from escaping through the passage past said poppet.

Abstract: A motor and reciprocating piston assembly is mounted in housing halves using elastomeric mounting members interposed between the assembly and each half. There are three spaced sleeve-like mounting points on each side of the assembly and three similarly spaced sleeve-like bosses on the housing halves. The mounting members have three mounting portions received in the mounting points and bosses. The three mounting portions are connected by integral arms.

Abstract: A valve assembly for a pumping apparatus includes a cylinder sleeve having a head end with inlet and outlet ports surrounded by a recess. An elastomer seal element is received in the recess and includes a peripheral portion that encircles the ports and a bridge portion that extends across the space between the ports. Integral flapper valves extend into the spaces between the peripheral portion and the bridge portion. A valve head with inlet and exhaust chambers has a flat surface that seats against the seal element. The cross-section of the peripheral and bridge portions are compressible, such as that of an O-ring.

Abstract: A valve plate assembly is provided with a valve restraint for maintaining a valve within a recessed portion of the valve plate. The valve restraint further includes an irregular surface which contacts the surface of the valve when the assembly is in use, for example, in a compressor. The irregular surface may include through-holes at least partially through the surface which contacts the valve or may be a textured surface which contacts the valve during use. The valve plate includes a recessed portion having guides for receiving notched sections in the sidewalls of the valve and valve restraint.

Abstract: A one-piece piston assembly including a hollow frusto-conical piston is secured to a crankshaft ring via a hollow joint or waist member. Preferably the joint or waist member is frusto-conically shaped as well.

Abstract: An improved wobble-type piston and rod assembly wherein the assembly includes a conical or infundibularly shaped piston that is capable of withstanding non-axial stress and strain forces induced by reciprocation of the crank shaft ring. An apex of the infundibularly shaped piston is attached to the ring. The piston can be attached to the crank shaft ring by means of a plurality of axial ribs, the ribs flaring outwardly from the apex of the piston to the ring. Alternatively, the piston can be attached to the ring by means of a flattened beam with two ribs/fins that flare outwardly within the plane of the beam. The piston rod assembly is formed as a unitary body.