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 mounting strap is provided to assist in holding a lighting fixture near an attachment point. The mounting strap has a first end having a portion that is bent at a point along its length to form an acute angle with respect to the length of the remainder of the mounting strap. An aperture is provided in the length of the member to attach the mounting strap to the lighting fixture. The bent portion may be suspended over the mount to which the lighting fixture is to be attached. Following the necessary installation steps, such as connection of electrical wire, the mounting strap may be placed on the mount on which the lighting fixture is attached.

Abstract: An axial piston fluid pumping apparatus is disclosed in which wobble pistons are rigidly connected to arms of a nutating plate that is rotatably mounted on a bearing which is mounted on a drive shaft. The axis of the bearing is at an acute angle to the axis of the shaft. The wobble pistons move within cylinders whose bores are disposed about the axis of the shaft. The motion of the pistons is in three dimensions within the bores.

Abstract: A drain cock device for venting or draining gas or liquid from a pressurized vessel, such as an air compressor, that provides occlusive closure of an opening in the pressurized vessel. When the drain cock is in an open position, gas or liquid may exit the vessel though an open cavity in a valve stem. The drain cock includes primary and back up seals that form by threading a stem through a housing aperture to a closed position. The primary seal is formed by a resilient sealing member tightly contacting the housing valve seat. The back up seal is formed by the rigid, conical surface of the valve stem mating with a rigid valve seat in the housing aperture. The double seal arrangement provides a dependable occlusive seal because the back up seal safeguards leakage in the event of primary seal failure. The drain cock reduces the likelihood of such failure because the surface to surface back up seal alleviates the transverse forces to which the primary resilient seal is subjected.

Abstract: A diaphragm (1) for a diaphragm pump consists of a resilient material having a substantially annular outer region of a relatively low thickness and an adjacent central region which becomes thicker radially towards the center. A solid molded core (3) is vulcanized in the central region, for connection with a pump drive part. An outer diameter (F) of the core is less than a third of the outer diameter (D) of the diaphragm, and the thickness (L) of the resilient material of the central region above the solid core is between 5% and 20% of the outer diameter of the diaphragm. The diaphragm is used to avoid undesirable deformation of the diaphragm, during a tilt transmitted from the drive to the solid core, on both sides of top dead center. This diaphragm produces a pump with a low clearance volume and a large compression ratio.

Abstract: A two-cylinder air compressor has a motor with a through drive shaft. Identical housings are provided at each end of a cylindrical spacer sleeve that surrounds the motor. The housings include cylinder housing extensions each of which mounts a cylinder sleeve, a valve plate, and a head. The heads are part of a one-piece cylinder head member. Wobble pistons are mounted on each end of the motor shaft and operate in the cylinder sleeves. The cylinder sleeves rest on a floor in the housing which has integrally formed passages for cooling air to circulate around the cylinder sleeves. The one-piece cylinder head member includes integral tubes connecting the heads. The integral tubes span the distance between the heads and are spaced from the outside of the spacer. The housings may be joined by through bolts or without bolts by press fitting the bearings in the housing, press fitting the housings to the spacer sleeve, and press fitting the motor shaft into the bearings.

Abstract: A cylinder sleeve is composed of multiple identical interlocking sleeve elements. Each sleeve element has a circular cylindrical portion and an integral circular arc portion tangent to the cylindrical portion. The circular arc portion has a boss on one end and an offset finger on the other which mates with the boss of an adjacent sleeve element to fix the adjacent sleeve elements together radially.

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 frame for a recessed light fixture having a opening for mounting a light reflector of a first size. A second opening of a smaller size is defined within the first opening so that a light reflector of the smaller size is mountable at the second opening should a smaller reflector be desired.

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.