Abstract: A hydrodynamic radial bearing including a cylindrical body having an inner wall and an outer wall, at least one gutter along the inner wall and at least one wedge-shaped recess in fluid receiving communication with the at last one gutter. The at least one wedge has a wide portion immediately adjacent the gutter and a narrow portion located away from the wide portion along the circumference of the inner wall.The bearing is manufactured by inserting the bearing into a fixture having at least one deforming protuberance located along an interior wall of the fixture so that the at least one protuberance contacts the outer wall of the bearing and elastically deforms the inner wall of the bearing. Then a machining operation is performed along the inner wall to remove the deformed portion of the inner wall. The bearing is then removed from the fixture and the machined portion of the wall retracts, forming at least one recess.

Abstract: A portable compressor, which includes a compressor airend for compressing a fluid; a prime mover operably connected to the airend to drive the airend and thereby compress the fluid; and a portable compressor housing which defines a housing chamber having a chamber temperature. The compressor means and prime mover are located in the chamber. The housing has a first end and a second end and means formed thereon to provide for ambient air to flow through the first and second ends and into the housing chamber. The portable compressor also including a housing chamber temperature optimizing system comprising: fan for drawing ambient air through the housing ends. The fan is adapted for movement in a first direction to draw ambient air through the first housing end and in a second direction to draw ambient air through the second housing end. The system also includes a chamber temperature measuring member located in the housing chamber; and a motor for moving the fan.

Abstract: A diaphragm pump including a pump housing having a first housing side and a second housing side; a first unitary manifold flow connected to the first housing side; a second unitary manifold flow connected to the second housing side. The first and second unitary manifolds are adapted to be flow connected to either the first or second housing sides. The diaphragm pump also includes a pump inlet manifold and a pump discharge manifold. The pump inlet and discharge manifolds each have a first end, a second end, a first flow port at one of the ends and a second flow port located along the manifold between the two manifold ends. Both of said manifolds are adapted to be flow connected to the first and second unitary manifolds.

Abstract: A portable machine having a frame and an engine supported by the frame, the engine having a power source and an engine cutoff device connected to the engine. In combination with the machine is a machine diagnosis circuit comprised of at least one protective switch connected in series with the engine power source and the engine cutoff device. The circuit also includes a diagnosis indicator combination wired across each of the at least one protective switches, the diagnosis indicator combination is comprised of an LED pair and resistor. In order to provide an indication of a machine problem, an indicator panel is located along the outside of the machine. The panel overlays the LED pairs and includes at least one icon which is illuminated by the LED pair to provide an outside readable graphical indication of the existence and location of the machine problem.

Abstract: A compressor running gear and method for assembling the running gear. The running gear includes a split housing having a first housing portion having a first wall and a second wall. Each wall includes at least one shoulder and a shroud. The split housing also includes a second housing portion adapted to be mated with the first housing portion, the first and second housing portions together define a housing chamber. The running gear also includes a crank assembly located in the housing chamber. The crank assembly includes first and second bearing carriers which are mounted on a crankshaft. Each of the bearing carriers has at least one arm adapted to be seated on the at least one shoulder.

Abstract: A fluid cylinder comprising a tube having a sidewall and at least one open end, the sidewall has a locking groove formed therein adjacent each of the at least one open ends, each of the open ends includes an edge which includes a chamfer. The fluid cylinder also includes at least one endcap for closing the at least one open end, each of the at least one endcaps comprising: a leading end having a groove formed therein, said groove adapted to receive a compressible retaining ring, the retaining ring adapted to engage the locking groove when the at least one open end is closed by the at least one endcap. Each of the endcaps also includes a shoulder and a sealing member located between the leading end and the shoulder, the sealing member is adapted to sealingly engage the edge of the at least one open end.

Abstract: An apparatus for primary air/oil separation for an oil-flooded air compressor, the apparatus includes a tank having a sidewall, a bottom end and a top end. The sidewall and ends define a tank separation chamber. The apparatus further includes a flow conduit for flowing an air/oil mixture from the compressor into the tank separation chamber. A primary separator element is located in the chamber and provides primary separation of the air/oil mixture. The primary separator element is flow connected to the flow conduit and includes a body with at least two discharge ends and an arcuate elbow flow connected to each of the at least two discharge ends. Each elbow has an outer peripheral portion and an inner peripheral portion. As the air/oil mixture is forced through the separator element, the oil is drawn to the outer peripheral portion and the compressed air is located in the inner peripheral portion. In this way, primary separation of the oil and the air is achieved.

Abstract: Insulation is provided in the form of wall insulation, piston or diaphragm insulation and/or piston rod and/or diaphragm washer insulation to increase the temperature in the working air chamber of an air motor of the piston or diaphragm type to reduce the formation of ice on exhaust.

Abstract: A reciprocating pump, comprising a reciprocating motor having a housing body which includes an open first end and a base at the first end, the base substantially closes the first end of the motor housing. The motor also includes a reciprocating member movable by the motor. The member has an end and is adapted to be movable through a housing body chamber. The reciprocating pump includes a pump outlet having a first end, a second end, a pumped fluid outlet port between the ends, and a passageway joining said ends and adapted to receive the end of the reciprocating member. The passageway has a minimum width and the outlet body is connected to the pump base. The reciprocating pump also includes a pump member adapted to be flow connected to the second end of the outlet body.

Abstract: A pressure relief valve for both reducing pressure in a vessel when the pressure of a mixed media combination made up of a mixture of gaseous and nongaseous components and contained in the vessel is at a relief valve actuating pressure, and for filtering nongaseous components from a mixed media combination flowed from the valve. The valve includes a housing with an inlet and a discharge port. The housing inlet is disposed in mixed media combination receiving communication with the vessel. The housing defines a housing chamber and the housing also includes a valve member movable within in the chamber between an occluding position, relative to the inlet when the vessel pressure is not at the actuating pressure, and a non-occluding position, relative to the inlet, when the vessel pressure is at the actuating pressure. The pressure relief valve also includes a filter device expandable by the mixed media combination when the vessel pressure is at the actuating pressure.

Abstract: A pressure relief valve for both reducing pressure in a vessel when the pressure of a mixed media combination made up of a mixture of gaseous and nongaseous components and contained in the vessel is at a relief valve actuating pressure, and for filtering nongaseous components from a mixed media combination flowed from the valve. The valve includes a housing with an inlet and a discharge port. The housing inlet is disposed in mixed media combination receiving communication with the vessel. The housing defines a housing chamber and the housing also includes a valve member movable within in the chamber between an occluding position, relative to the inlet when the vessel pressure is not at the actuating pressure, and a non-occluding position, relative to the inlet, when the vessel pressure is at the actuating pressure. The pressure relief valve also includes a filter device expandable by the mixed media combination when the vessel pressure is at the actuating pressure.