Abstract: The filter of a compressor is located in the casing of the compressor. The fluid path includes passages in the casing such that brazed connections are not required between the filter and the parts requiring lubrication.

Abstract: A gas/liquid mixture passes through a duct in which a filter device is interposed, the filter device being disposed such that its outlet duct is essentially vertical. The outlet duct opens out into a collecting enclosure placed above the filter device. A side outlet duct from the enclosure is disposed below the level of the liquid collected in the enclosure, a top portion collecting the gas given off above the level. The top portion communicates with the inlet of a jet which reinjects the gas into the outlet flow so as to form a homogeneous gas/liquid stream. The invention may be used, in particular, in the lubrication circuit of a vacuum pump having vanes and oil seals.

Abstract: An air-cooled oil-free screw compressor is provided with a first lubricating oil circulating flowpassage 1 which extends from an oil tank 20 via an oil pump 21 and an air heat exchanger 22 to cooling jackets 15 and 16 for cooling compressor bodies 12 and 13. A second such passage is connected between the cooling jackets and the oil tank and includes an oil filter 23, lubricating oil.

Abstract: An oil injection type screw compressor includes an oil passage for circulating lubricating oil extending from an oil separator disposed in a discharge passage of a compressor main body through an oil cooler, oil filter and oil pump on the downstream side of the oil pump to parts requiring lubricating oil such as rotors, bearings, shaft sealing members within the compressor main body, the compressor comprising pressure switches for detecting a pressure of a suction passage as a low pressure side, and a pressure of the oil passage between the oil filter and the oil pump as a high pressure side, whereby starting the oil pump when the differential pressure between both the detected pressures is not more than the specified value.

Abstract: An improved lubrication system for a refrigeration compressor is disclosed which lubrication system incorporates filtering arrangement for filtering lubricant supplied to a two stage lubricant pump and unique venting arrangement for venting gaseous refrigerant entrained within the lubricant. The two stage pump incorporates a vent passage in the first stage portion thereof which aids in avoiding a possible interruption of lubricant flow due to gaseous refrigerant within the first stage. A second radially extending restricted vent passage is provided in the drive shaft intermediate the ends thereof which is also designed to vent gaseous refrigerant while resisting the flow of lubricant therethrough so as to avoid priming thereof which could enable the passage to begin pumping lubricant.

Abstract: An oil filtration and exhaust apparatus for filtering particulates and gases from the recirculating oil of a vacuum pump which is adapted to remove gases from a process enclosure. The oil filtration and exhaust apparatus removes particulates and gases from the recirculating oil by means of particulate filters and a gas scrubbing filter. Additionally, the exhaust gases are demisted prior to exhaust to an exhaust header. The apparatus is particularly suited to semiconductor manufacturing processes.

Abstract: A lubricant circuit and a process for circulating a lubricant through such lubricant circuit of a compressor unit incorporating a planetary rotating compressor having a piston in an opening of a cylinder-piston. One embodiment of a circuit and one embodiment of a process of this invention relies on pressure in a lubricant separator vessel to force the flow of lubricant through the circuit to the compressor, and used lubricant pump as a scavenge pump. Another embodiment of a circuit and another embodiment of a process of this invention relies on the pressure developed by the lubricant pump to force the flow of lubricant through the circuit to the compressor, and utilizes a float operated valve to maintain constant lubricant level in the lubricant separator vessel.

Abstract: A screw compressor assembly includes a motor housing section, a compressor section and an oil separator downstream of the compressor discharge port. The motor housing section defines a flow path for suction gas traveling to the working chamber of the compressor so that the compressor drive motor is cooled by suction gas. The motor housing section also internally defines an integral heat exchange structure through which a passage for the flow of oil is defined. Discharge pressure in the oil separator drives separated oil into the passage in the motor housing heat exchange structure prior to the delivery of such oil to compressor surfaces requiring lubrication. The oil flowing through the integral heat exchange structure is cooled by the suction gas passing over the surface of the heat exchange structure interior of the motor housing.

Abstract: In the arrangement, a gear housing rotatably journals juxtaposed ends of coacting lobed, male and female rotors on a horizontal plane, and a passageway confined in the housing, on a diagonal plane which tranverses the horizontal plane, conducts oil therethrough to rotor-end bearings from an oil-admittance port at an upper end of the passageway. The rotors, then, are below the port, at a lower end of the passageway and, accordingly, the gear housing-supplied oil is scavenged into the rotors. Further, the compressor has an airend which comprises the gear housing, the latter being of aluminum, die-cast formation, having parallel, side faces, with an oil filter mounting coupled to one of the faces. A drive gear, and a therewith meshing driven gear, are supported by the housing. The driven gear is drivingly coupled to the male rotor, substantially centrally in the housing, and the female rotor is journaled in the housing, as noted, outwardly (relative to the housing) from the driven gear and male rotor.

Abstract: A pump for pumping a liquid containing solid contaminants, which pump comprises rotatable pumping means for pumping the liquid from a pump inlet to a pump outlet, a filter for filtering the liquid, auxiliary pumping means for pumping the liquid to the filter, first passage means for passing filtered liquid to at least one bearing in the pump for lubrication, a rotor device which is operative during use of the pump to cause the liquid inside the filter to swirl and clean the inside of the filter, and second passage means for allowing the passage of unfiltered liquid from the inside of the filter whereby the unfiltered liquid can remove separated solid contaminants on the inside of the filter.

Abstract: A screw compressor with liquid injection wherein the units previously disposed separately from one another, such as the air filter, liquid separator, and so on, are integrated into a single housing. Various compartments are formed in the housing by means of partitions, such that the compartments provide for good separation of entrained liquid from the compressed air being achieved because of large flow cross-section, maximum utilization of the available flowpath and multiple deflection of the current of compressed air. The compact construction results in a substantially smaller overall compressor size than that of comparable known compressor plants, in a reduction of manufacturing cost and simplification of the assembly of a compressor plant.

Abstract: A gas ballast device for an oil sealed mechanical rotary vane vacuum pump prevents vapor condensation in the outlet port region of the low vacuum stage of the pump as a vane cyclically approaches the outlet port, whereby molecules of condensed vapor in the oil do not flow back to the inlet port of the low vacuum stage through the oil seal between the inlet and outlet ports. A flow path for atmospheric air leading to the outlet port region includes a tortuous, constricted fluid passageway. An outlet passage connecting the tortuous, constricted fluid passageway to the outlet port region is positioned so that an orifice thereof into the outlet port region is filled with and sealed by oil except during a small portion of each vane cycle immediately after the vane passes the orifice, whereby no movement of mechanical parts is employed to control air flow in response to the cyclical movement of the vanes past the orifice.

Abstract: This invention relates to a rotary internal combustion engine operating on the four-stroke cycle: intake, compression, combustion and exhaust and the utilization of a star-shaped eccentric for converting the rotation of the rotor to driving the mainshaft, and an associated carburetor.