Abstract: A horizontal type rotary compressor includes a lubricant distribution system which does not require a check valve for preventing the return of lubricant from the frictional bearing surfaces to the blade chamber. An eccentric blade within a blade chamber pumps lubricant out of the blade chamber through an aperture in one wall thereof. A dispensing pipe communicates the aperture of the blade chamber with the frictional bearing surfaces and includes an opening in the pipe adjacent the blade chamber. Reciprocal movement of the blade causes lubricant to be sucked through the aperture of the blade chamber and discharged from the blade chamber into the dispensing pipe. The opening in the pipe permits a larger amount of lubricant to pass into the pipe than out of the pipe, thereby effectively acting as a check valve and negating the need for a separate check valve in the lubricant distribution system.

Abstract: A horizontal type rotary compressor includes a lubricant distribution system which does not require a check valve for preventing the return of lubricant from the frictional bearing surfaces to the blade chamber. An eccentric blade within a blade chamber pumps lubricant out of the blade chamber through an aperture in one wall thereof. A dispensing pipe communicates the aperture of the blade chamber with the frictional bearing surfaces and includes an opening in the pipe adjacent the blade chamber. Reciprocal movement of the blade causes lubricant to be sucked through the aperture of the blade chamber and discharged from the blade chamber into the dispensing pipe. The opening in the pipe permits a larger amount of lubricant to pass into the pipe than out of the pipe, thereby effectively acting as a check valve and negating the need for a separate check valve in the lubricant distribution system.

Abstract: The invention comprises an arrangement, for use particularly in connection with a rotary displacement machine such as an air compressor, in which the fluid (air) compressed in the machine is employed to supply lubricant cyclically to the mating or coacting surfaces of the confined rotary piston and the walls of the compression chamber. A lubricator valve, having a translating piston and integral stem, is employed to extract oil from a repository supplied by an oil pump, and introduce it into a tapped-off compressed air line for pressurized injection into the compressor.

Abstract: The system comprises an arrangement for supplying sealing and lubrication oil to a gas compressor in an embodiment of the invention in which the oil pump is relieved of high pressure demand during normal compressor operating. A pneumatic control valve bypasses a quantity of the pump output in order that the pump can run with less energy demand. The valve is controlled by biasing and limiting pneumatic relays, and a pressure controller which regulate the bypass of pumped oil to a reservoir. One biasing relay adds a measure of pressure to a pilot signal, addressed to the control valve, to accommodate for line losses, and another relay establishes a lower, pilot signal limit, to insure that the oil pressure will not go below the pressure of coolant in an oil cooler.

Abstract: An oil-sealed vacuum pump comprises an oil circuit for supplying a pump chamber and bearings of the vacuum pump with oil. The oil circuit includes first and second branch conduits leading to the bearings and the pump chamber, respectively. The vacuum pump further has an oil pump coupled to the oil circuit for driving oil therethrough, a valve assembly coupled to the oil circuit for shutting off oil supply to the pump chamber during standstill of the vacuum pump, and a pressure reducer coupled to the oil circuit for reducing the oil pressure to environmental pressure. The first branch conduit leading to the bearings is situated upstream of, and the second branch conduit leading to the pump chamber and the valve assembly are situated downstream of the pressure reducer as viewed in the direction of oil flow in the oil circuit.

Abstract: A rotary compressor comprises a compression chamber defined by enclosing both ends of a cylinder with a main bearing and an end bearing; compression elements including a piston which is eccentrically rotated by a crank shaft within the compression chamber, and dividing the compression chamber into a high pressure chamber and a low pressure chamber; and a sealed container to be a plenum space, in which the compression elements are housed and lubricating oil is sumped at the inner bottom section of the sealed container to effect lubrication of sliding parts of the compression elements, wherein the lubricating oil is returned into the sealed container after it has been cooled through a heat-exchanger provided outside the sealed container.

Abstract: A combined power steering pump and vacuum pump assembly is disclosed wherein a vented reservoir is connected to receive the discharge of the vacuum pump as well as supply the fluid for circulation by and lubrication of the power steering pump. A sealing arrangement seals the vacuum pump from the power steering pump when the pumps are stopped but provides limited delivery of the fluid from the power steering pump to the vacuum pump when the pumps are running whereby the fluid in the power steering system is prevented from draining into the vacuum pump when stopped and is delivered thereto when running to lubricate same and is then delivered with the discharge air to the reservoir so that there is no loss of the fluid from the power steering system in lubricating the vacuum pump.

Abstract: A system for lubricating the main drive shaft bearings in a scroll compressor enclosed within a hermetic shell. The drive shaft and its main bearings are supported in a frame that defines first and second chambers adjacent each end of a main bearing. Each of the chambers includes an opening to a spatial volume contained within the compressor shell. An oil pump at the lower end of the drive shaft supplies oil through a bore in the shaft to a swing link bearing and a thrust bearing, both disposed adjacent its upper end. Oil is dispersed into the spatial volume as a mist of oil droplets by the rotating elements connected to the drive shaft. Fan means are disposed within the second chamber and are operative to develop a differential pressure between the two chambers so that oil droplets are drawn toward the first chamber, lubricating the main bearing as they pass through it.

Abstract: A vacuum pump comprises a suction nipple valve including a cylinder, a piston slidably received therein and a movable valve closing member operatively connected to the piston. The vacuum pump further has a pressure medium conduit having a first end communicating with the cylinder; an inlet opening at a second end of the conduit for pressure medium to flow through the inlet opening to the piston; a control arrangement for closing and opening the inlet opening dependent upon run or standstill of the vacuum pump. In the closed state of the inlet opening an oil quantity is maintained above the inlet opening.

Abstract: A method and apparatus for lubricating a vacuum pump, preferably a rotary vane vacuum pump, wherein the pump rotor is mounted on a hollow drive shaft continuously fed with a lubricating oil stream under excess pressure from an oil pump, radial openings being provided in the hollow shaft for the outward supply of lubricating oil to the elements being lubricated with the lubricating oil stream from said oil pump being fed under excess pressure as a pulsating and preferably intermittent flow stream into the interior of the hollow shaft.

Abstract: In a scroll-type compressor, the sum of pressure receiving areas of the upper end surfaces of crank portion of a crankshaft and the upper end surface of a balance weight is made substantially equal to the sum of the pressure receiving areas of the lower end surface of the shaft portion of the crankshaft and the lower end surface of the balance weight, the surfaces being subjected to internal pressures of the compressor. Consequently, only the downward force produced by the weights of the crankshaft and the rotor of a driving motor is applied to the crankshaft as an axial load which is born by a thrust bearing. Since the thrust bearing is required only to bear a small thrust load, it is free from the problems such as rapid wear and seizure.

Abstract: A horizontal rotary type compressor having a rotary compression unit hermetically contained in a closed shell has its lubricating parts effectively lubricated by lubricant oil being fed to the central lubrication bore formed axially in the crankshaft through a lubricant oil feed tube which is opened at one end within the lubricant oil accumulated on the bottom of the closed shell and adapted to be intermittently subjected to the refrigerant gas discharged from the compression unit.

Abstract: The lubricant metering system for a rotary internal combustion engine has a lubricant metering device connected to the engine to communicate with the working chambers of the engine during the compression phase of operation thereof and is in communication with a source of lubricant to receive lubricant to be metered from the latter in a lubricant reservoir. The lubricant metering device is also connected to deliver metered lubricant from the lubricant reservoir to a place of use in the engine. A differential pressure sensing means is provided in the lubricant metering device to sense the differential gaseous fluid pressure in the working chamber and the lubricant pressure in the lubricant reservoir and to displace lubricant from the lubricant reservoir in response to engine speed and load demand.

Abstract: A refrigerant compressor for use in refrigerators, air conditioners, heat pumps or the like apparatus. The refrigerant pump has a casing which encases a combination of a compressor and an electric motor. A spring guide has an attaching base portion fixed to a bearing supporting a crank shaft driven by the motor, and an oil pipe connected to the attaching base such that the inside of the oil pipe opens to one end of the crank shaft. The oil pipe is bent so that the free end thereof is immersed in the lubricating oil in the case. The oil pipe receives a closely-coiled spring which is fixed at its one end to the end of the crank shaft while the other end is immersed in the lubricating oil. As the compressor operates, the coiled spring rotates in the oil pipe so that the lubricating oil is sucked by the lead of the coiled spring through the gap formed between the inner peripheral surface of the oil pipe and the coiled spring.

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: An oil distribution system for lubricating bearings in a scroll compressor. The system includes an oil collector cup attached to the lower surface of a swing link. Oil pumped through an internal passage in a rotating drive shaft is retained in the collector cup when the compressor stops, so that it is immediately available to lubricate adjacent bearings upon restart of the machine. Also disclosed in two embodiments are means for distributing and properly allocating the flow of oil between a thrust bearing and a swing link bearing.

Abstract: A rotary compressor of the sliding vane type which is constructed to prevent seizure during high speed operation, with increased volume efficiency through reduction of leakage of refrigerant, and simultaneous improvements in refrigeration cycle efficiency by the prevention of entry of oil into the refrigeration cycle.

Abstract: A pumping apparatus for pumping liquids such as slurrys comprises a pumping cylinder/piston (6,8) driven by the piston/cylinder (16,18) of an operating device, the supply of fluid under pressure either to an upper port (16a) of the cylinder (16), or the lower port (16b) of the cylinder, being controlled by valve mechanism (28). The valve mechanism is moved between two conditions, in which it supplies fluid under pressure to one or other of said ports consequent upon the arrival of a member (20) connecting the two pistons (8,18) at one or other of its extreme positions of movement. Alternatively, or in addition, the fluid pressure circuit powering the operating device includes a regenerative branch, through which fluid under pressure flows from the low pressure side of the operating device directly back to the high pressure line of the fluid circuit, upstream of the motor supplying fluid under pressure.

Abstract: A horizontal rotary type compressor having a rotary compression unit hermetically contained in a closed shell has its lubricating parts effectively lubricated with the lubricating parts effectively lubricated with the lubricant oil being fed to the central lubrication bore formed axially in the crankshaft through a lubricant oil feed tube which is opened at one end within the lubricant oil accumulated on the bottom of the closed shell and adapted to be intermittently subjected to the refrigerant gas discharged from the compression unit.

Abstract: In a rotary compressor unit including a compressor comprising a rotor rotatable in a cylinder, a blade in contact with an outer surface of the rotor and reciprocated thereby in a radial direction in a closed chamber formed in the cylinder, the chamber being defined by longitudinally spaced apart end plates on both sides of the cylinder, suction and discharge and passages opening through the end plates into the closed chamber, and a check valve provided at least in the suction passage, the check valve comprises a fluid diode.

Abstract: A scroll compressor for compressing a gas to a high pressure or for use in a refrigeration system such as a refrigerator, freezer, air conditioner or the like, is provided. In the compressor, a compressor unit and its driving motor is enclosed gas-tightly in a casing, and the compressor unit is provided with a backpressure chamber into which is introduced a partially compressed gas so as to press an orbiting scroll member against a stationary scroll member. The compressed gas discharged from the compressor unit is circulated through component parts such as the motor enclosed in the casing before it flows into a next stage outside of the compressor. With the above arrangement, the separation of the orbiting scroll member from the stationary scroll member due to the gas pressure is prevented to thereby attaining a secure axial seal between them, and also the motor is satisfactorily cooled.

Abstract: A horizontal rotary type compressor having a rotary compression unit hermetically contained in a closed shell has its lubricating parts effectively lubricated with the lubricating parts effectively lubricated with the lubricant oil being fed to the central lubrication bore formed axially in the crankshaft through a lubricant oil feed tube which is opened at one end within the lubricant oil accumulated on the bottom of the closed shell and adapted to be intermittently subjected to the refrigerant gas discharged from the compression unit.

Abstract: A scroll-type compressor constituted by a stationary scroll and a revolving scroll, and an electric motor for causing a revolving motion of the revolving scroll are disposed in a closed container. The scroll-type compressor has openings which are adapted to permit fluid compression pockets between two scrolls to be communicated with the space inside the closed container when the pressure in the pockets have been increased to a predetermined pressure intermediate between the suction and discharge pressures, so that the pressure in the closed container may be maintained at the same level as the above-mentioned predetermined pressure. The bottom part of the closed container constitutes an oil well where the lubricating oil is stored. This oil well is connected to the suction side of the compressor through an oil feed passage constituted by a capillary tube, so that the oil is fed to the compressor due to the pressure difference between the space inside the closed container and the inlet side of the compressor.

Abstract: In a scroll type compressor unit including two interfitting fixed and orbiting scroll members in the compressor housing, a crank shaft projecting from the interior of the compressor housing and rotatably supported by a radial bearing, a crank pin on the inner end of the crank shaft on which the orbiting scroll member is rotatably supported by another radial bearing, and a rotation preventing mechanism for preventing the orbiting scroll member from rotating, an oil accumulating chamber is provided in the compressor housing to connect with the fluid inlet port of the compressor housing in order to lubricate those radial bearings and other moving parts. A shaft seal assembly is mounted on the crank shaft in a shaft seal cavity which is communicated with the oil accumulating chamber through a first oil passageway formed in the wall of the compressor housing.

Abstract: A rotary piston engine including a lubricating system having an oil passage extending axially through an eccentric shaft for supplying lubricating oil from an oil pump to bearing portions. A pressure regulator valve is provided in said oil passage in the eccentric shaft so that the oil pressure as regulated by the regulator valve is not affected by the centrifugal force which may be produced in the oil passing through a radial passage between the oil pump and the oil passage in the eccentric shaft. The regulator valve may include a temperature sensor which is responsive to the surrounding temperature.

Abstract: A mechanical rotary vane vacuum pump has high and low vacuum stages for a pumped gas. Each stage includes a rotor for vanes cyclically driven about a common axis that is eccentric to a cylinder of a stator; the stator of each stage includes an inlet and outlet for the pumped gas. An oil seal between inlets and outlets for each stage is in a narrow gap between the stator and rotor. An interstage structure includes a flow path between the stages for the pumped gases and a shaft drivingly connected the rotors of the stages. An oil flow path comprises a first passage through the interstage structure leading radially to the shaft. The shaft includes diametrically opposed oil metering flats or cavities longitudinally aligned with an outlet of the first passage. A second passage through the interstage structure is longitudinally aligned with the cavities and leads tangentially from the peripheries of the shaft and a bore for the shaft.

Abstract: The rotary-piston internal combustion engine comprises a trochoidal working chamber with a vertical major axis, a rotor shaft mechanically coupled to a generator and a water pump mounted on the engine housing, an auxiliary drive shaft used for driving an oil pump communicating in series with a water-cooled oil radiator and oil filter, a fuel pump and a lubricator installed on the engine housing. The auxiliary drive shaft is inclined at an angle of 7 to 15 deg of arc in the direction of rotation of the rotor shaft with respect to the working chamber major axis so that the drive shaft geometrical axis intersects the major axis somewhat above the chamber uppermost point and its opposite ends are used to drive the lubricator and the oil pump installed at the respective extremities of the shaft.

Abstract: Scroll apparatus for pumping liquids wherein recessed liquid transfer passage means are provided in the end plates of the scroll members. The transfer passage means may be inner passages within the scroll involutes, outer passages outside the scroll involutes or a combination of inner and outer passages. These passages are located and configured to be opened substantially immediately after the orbiting involute wrap has reached that point in its orbiting cycle to define three essentially completely sealed-off liquid zones. These passages remain open at least until the liquid passages between the wraps are sufficiently large to prevent any substantial pressure pulsations within the scroll liquid pump. The scroll liquid pumps may be operated to pump liquid radially inward or outward.

Abstract: A radial engine with a rotating cylinder block is disclosed which is capable of high rates of rotation although operating on the two stroke cycle. An intake air compressor and an exhaust driven turbine are provided, both in driving connection with the same output shaft as the cylinder block. A peripheral manifold serves both to provide the stator of the exhaust turbine and to mask exhaust passages from the cylinders in the block so as to modify the two stroke cycle of the engine by effectively advancing the end of the scavenge phase. A system for recovering oil from the block is disclosed, and the block is reinforced by a peripheral tension band.

Abstract: A compressor capacity control and lubrication system including a nonmodulating capacity regulator for an oil flooded gas compressor such as a rotary screw compressor. The system includes an on-off intake regulator. The lubrication system insures sufficient supply of cooling and sealing lubrication when the machine is operating at loaded conditions and a limited quantity of cooling lubrication when the machine is operating at unloaded conditions. This is accomplished by the use of a pair of gas-liquid reservoirs. One of the reservoirs is vented to atmosphere during unloaded operation of the compressor. Lubricant is supplied from both reservoirs to the compressor when the machine is operating at loaded conditions, but only one of the reservoirs when operating at unloaded conditions.

Abstract: Liquid-cooled rotary piston internal combustion engine with a housing consisting of at least one annular shell with interior guideway and two parallel end pieces, and bounding an interior space. The shell and end pieces containing cavities for circulation of two cooling circuits completely separate from each other. One of the circuits cools the region of the housing in the hot arc of the shell, where the ignition, expansion and exhaust strokes take place in the interior space. A liquid-cooled piston revolves in the housing. The cooling circuit of the piston and the shell cooling circuit traversing the region of the hot arc are connected in series.

Abstract: A method for reducing power consumption in a liquid-cooled type rotary compressor wherein a mixture of gas compressed in at least one compression chamber and liquid for cooling, lubricating and sealing are separated from each other immediately after the mixture is delivered out of the compression chamber to a delivery chamber so that the gas and liquid are allowed to behave separately. Further comprising the step of regulating the amount of liquid injected into said compression chamber always when the compressor is in operation. The said delivery chamber has a structure and dimension suitable for separating liquid from gas.

Abstract: The process enables, while starting from the same basical members, assembled in two different arrangements, to drive an earth-boring tool such as a bit, a milling cutter, a core barrel or the like with a reduced speed or a fast speed, according to the prevailing boring conditions. The downhole motor comprises a shaft and a body constituted by two helicoidal gears arranged within each other, providing an encapsulation preferably of right-handed pitch and having K and K+1 teeth. For providing a reduced speed the body is rotatably mounted and the tool is connected to said body. The shaft is angularly fixed and free to undergo a nutation movement. The resulting speed is the relative speed of rotation between the said body and the said shaft. For providing a fast rotation speed, the body is angularly and radially fixed. The helicoidal shaft meshes with the body and is supported in order freely to rotate around a crank system. The tool is connected to the crank.

Abstract: A rotary mechanism including a housing defining an operating chamber, a shaft journalled in the housing and having an eccentric within the chamber, a rotor within the chamber and journalled on the eccentric, a timing gear carried by the housing and within the chamber and having a predetermined number of teeth, an internal ring gear carried by the rotor and meshed with the timing gear, the ring gear having a number of teeth greater than the predetermined number of the timing gear whereby a crescent-shaped gap between the gears exist. A crescent-shaped pad is carried by the eccentric within the gap and an inlet port is provided in the eccentric adjacent one corner of the pad for supplying hydraulic fluid to the gap. An outlet port is located in the eccentric adjacent the other corner of the pad for conveying pressurized hydraulic fluid to a point of use within the mechanism. The invention provides high pressure hydraulic fluid through unique use of the timing and ring gears necessary in such mechanisms.

Abstract: The lubrication system for rotary mechanisms of the Wankel type, having a housing in which a rotor planetates, comprises an elongated, shallow trough in the inner peripheral surface of the trochoid housing of the mechanism, which trough extends substantially across the entire width of the surface and with its longitudinal axis canted relative to the trace line of the inner peripheral surface. A supply means is provided to conduct metered amounts of lubricant to the trough from a suitable source of lubricant to fill and maintain the trough in a full condition so that the apex seal blade carried by the rotor picks-up and distributes lubricant along the inner peripheral surface.

Abstract: Cooling means are provided for the stationary and orbiting scroll members of scroll-type apparatus. These cooling means comprise fluid coolant channels in the end plates and in the involute wraps of the scroll members and means to circulate a fluid coolant therethrough. In the case of the stationary scroll member the coolant may be water, oil or the like; while in the case of the orbiting scroll member the coolant is the lubricating oil used to lubricate a thrust bearing and the coupling means. The resulting effective cooling of the scroll members makes it possible to form scroll apparatus in large sizes.

Abstract: An improved means for lubricating the compression seals of rotary engines. The system is provided in a typical rotary engine having a housing with a main shaft extending through the housing and a rotor within the housing and journalled on the main shaft. The rotor includes a bore receiving the shaft. Conventional means are provided for supplying lubricant to the interface of the main shaft and the rotor at the bore. The rotor carries at least one compression seal and is provided with a lubrication conduit for the seal extending from the bore to a surface of the rotor adjacent the seal. During operation of the engine, relative rotation between the rotor and the shaft takes place and generates a pumping action at the interface to drive small amounts of lubricant through the lubrication conduit to the rotor surface to lubricate the seal.

Abstract: In rotary compressor of oil cooling type comprising; an unloader, a housing including a rotor chamber therein connected to said unloader, rotors housed within said housing, a reservoir for compressed air and oil connected through a check valve to a discharge port of said chamber and pipes for feeding oil from said reservoir into said chamber, the improvement wherein said rotary compressor further comprises an oil delivery pump is operatively connected to said rotors and an appropriate oil-discharge pipe is provided for delivering the cooling lubricant oil drawn from said port by said pump to said reservoir.