Abstract: The pneumatic drill has member defining an air input and an air output and a housing defining an internal cylindrical chamber having bearing surfaces having a through axis. A driven shaft is coupled to the tool engaging chuck that defines a plurality of longitudinal slots. The driven shaft is disposed within the chamber and has a longitudinal axis offset from the through axis. A plurality of vanes each being partially formed of graphite that are individually disposed within one of the plurality's of longitudinal slots. Two of the vanes, the housing, and the driven shaft define a moving compression chamber.

Abstract: A pumping device and method are described. The pumping device comprises a dry rough vacuum pump equipped with a gas inlet connected to a vacuum chamber, a gas outlet leading to a conduit and an ejector. The pumping method comprises pumping gases contained in the vacuum chamber using the dry rough vacuum pump through the gas inlet, measuring electric power consumed by the dry rough vacuum pump and the pressure of the gases in the conduit, starting the ejector, when the pressure of the gases at the outlet and the electrical power consumed cross respective set point values as they rise and stopping the ejector when the electric power consumed and the pressure of the gases in the conduit at the outlet cross respective set point values as they fall.

Abstract: A suction screen member is provided that bridges the inlet port and entrance port between a compressor housing and a suction duct in a scroll compressor. The suction screen member also serves to screen fluid entering the scroll compressor to prevent particulates from entering the scroll compressor. The suction screen member may be formed from only two components, including a sheet metal body that has a folded over section to provide a mounting segment that mounts into the inlet fitting for the outer housing and a tubular extension. Crimping of the folded over segment can secure the screen thereto. Other embodiments may have employ welding for screen attachment.

Abstract: A screw displacement pump is provided. The screw displacement pump is of single-entry, double-shaft construction with an external bearing of the two screw shafts. A pump housing encloses the screw shafts by forming feed chambers and externally delimiting the feed chambers with its internal shell surface, as well as a suction chamber for the medium to be induced and a pressure chamber to accommodate the medium pumped by the screw shafts. The pump housing is inserted into a pressure housing and attached to the pressure housing, so that the pressure chamber encloses the pump, at least in part.

Abstract: The present invention is intended to remove foreign matter such as worn powder in a refrigerating cycle and enhance the reliability in a refrigerating cycle using, in particular, HFC refrigerant. In the invention, accordingly, a coil shaped connection piping is provided in at least front portion or rear portion of a throttling unit, a fine pipe is connected to a lower portion of the connection piping, and a collector for collecting foreign matter in the refrigerating cycle is coupled to this fine pipe. Foreign matter in the refrigerant is separated from the refrigerant by centrifugal force, and is collected in the collector. Moreover, the foreign matter collecting effect is enhanced by disposing a magnetic piece in the collector.

Abstract: In a screw type vacuum pump which includes a housing provided with a rotor chamber, a pair of screw rotors in mesh with each other rotably provided in the rotor chamber, a transfer chamber of gas formed between an inner wall of the housing and flutes of the aforesaid pair of screw rotors, and a suction port and an exhaust port communicated to the transfer chamber, the gas being sucked from the suction port into the transfer chamber and exhausted from the exhaust port, by providing the aforesaid exhaust port in a side face of the housing, it is possible to form a larger exhaust port, and a time until the port is blocked with deposits can be prolonged.

Abstract: A variable valve timing control device includes a rotation member for opening or closing a valve, a rotation transmission member engaged with the rotation member to be relatively rotatable, a vane provided on either one of the rotation member or the rotation transmission member, a hydraulic chamber formed between the rotation member and the rotation transmission member and including an advance angle chamber and a retarded angle chamber, the advance angle chamber and the retarded angle chamber being formed by dividing the hydraulic chamber by the vane, a first hydraulic passage for supplying and discharging a fluid to the advance angle chamber, and a second hydraulic passage for supplying and discharging the fluid to the retarded angle chamber. The vane includes a surface hardness determined to be higher than a surface hardness of a sliding surface of the rotation member or the rotation transmission member for sliding the vane.

Abstract: A family of sliding vane rotary power devices provides an internal combustion engine, a pump, a compressor, a fluid-driven motor, an expander device, a fluid-driven pump, a compressor or a throttling device. All of these devices have a rotor assembly with a number of vanes equally spaced about the rotor dividing the rotor chamber into discrete cavities. As the rotor turns, the vanes follow the wall contour of the rotor chamber so that the cavities rotate with the rotor and expand and contract as the rotor turns. Various combinations of smooth wall contours and rotational arrangements are provided in different devices in order to cause an appropriate number of expansions and contractions of a cavity during the course of a rotation. Various devices in the family of devices differ both in the shape of the rotor chamber and in the configuration of an internal stator member about which the rotor assembly turns.

Abstract: The present invention is intended to remove foreign matter such as worn powder in a refrigerating cycle and enhance the reliability in a refrigerating cycle using, in particular, HFC refrigerant. In the invention, accordingly, a coil shaped connection piping is provided in at least front portion or rear portion of a throttling unit, a fine pipe is connected to a lower portion of the connection piping, and a collector for collecting foreign matter in the refrigerating cycle is coupled to this fine pipe. Foreign matter in the refrigerant is separated from the refrigerant by centrifugal force, and is collected in the collector. Moreover, the foreign matter collecting effect is enhanced by disposing a magnetic piece in the collector.

Abstract: A screw-type dry vacuum pump comprises a rotor having a screw thread thereon for exhausting a gas through rotation, a casing for housing the rotor therein, a reduced portion provided in the casing, and an enlarged portion provided on a discharge end of the casing. The reduced portion forms a slight gap between the outer circumferential surface of the rotor and the inner surface thereof. The enlarged portion forms a larger gap between the outer circumferential surface of the rotor and the inner surface thereof.

Abstract: The present invention is intended to remove foreign matter such as worn powder in a refrigerating cycle and enhance the reliability in a refrigerating cycle using, in particular, HFC refrigerant. In the invention, accordingly, a coil shaped connection piping is provided in at least front portion or rear portion of a throttling unit, a fine pipe is connected to a lower portion of the connection piping, and a collector for collecting foreign matter in the refrigerating cycle is coupled to this fine pipe. Foreign matter in the refrigerant is separated from the refrigerant by centrifugal force, and is collected in the collector. Moreover, the foreign matter collecting effect is enhanced by disposing a magnetic piece in the collector.

Abstract: The present invention is intended to remove foreign matter such as worn powder in a refrigerating cycle and enhance the reliability in a refrigerating cycle using, in particular, HFC refrigerant. In the invention, accordingly, a coil shaped connection piping is provided in at least front portion or rear portion of a throttling unit, a fine pipe is connected to a lower portion of the connection piping, and a collector for collecting foreign matter in the refrigerating cycle is coupled to this fine pipe. Foreign matter in the refrigerant is separated from the refrigerant by centrifugal force, and is collected in the collector. Moreover, the foreign matter collecting effect is enhanced by disposing a magnetic piece in the collector.

Abstract: The present invention is intended to remove foreign matter such as worn powder in a refrigerating cycle and enhance the reliability in a refrigerating cycle using, in particular, HFC refrigerant. In the invention, accordingly, a coil shaped connection piping is provided in at least front portion or rear portion of a throttling unit, a fine pipe is connected to a lower portion of the connection piping, and a collector for collecting foreign matter in the refrigerating cycle is coupled to this fine pipe. Foreign matter in the refrigerant is separated from the refrigerant by centrifugal force, and is collected in the collector. Moreover, the foreign matter collecting effect is enhanced by disposing a magnetic piece in the collector.

Abstract: The present invention is intended to remove foreign matter such as worn powder in a refrigerating cycle and enhance the reliability in a refrigerating cycle using, in particular, HFC refrigerant. In the invention, accordingly, a coil shaped connection piping is provided in at least front portion or rear portion of a throttling unit, a fine pipe is connected to a lower portion of the connection piping, and a collector for collecting foreign matter in the refrigerating cycle is coupled to this fine pipe. Foreign matter in the refrigerant is separated from the refrigerant by centrifugal force, and is collected in the collector. Moreover, the foreign matter collecting effect is enhanced by disposing a magnetic piece in the collector.

Abstract: The present invention is intended to remove foreign matter such as worn powder in a refrigerating cycle and enhance the reliability in a refrigerating cycle using, in particular, HFC refrigerant. In the invention, accordingly, a coil shaped connection piping is provided in at least front portion or rear portion of a throttling unit, a fine pipe is connected to a lower portion of the connection piping, and a collector for collecting foreign matter in the refrigerating cycle is coupled to this fine pipe. Foreign matter in the refrigerant is separated from the refrigerant by centrifugal force, and is collected in the collector. Moreover, the foreign matter collecting effect is enhanced by disposing a magnetic piece in the collector.

Abstract: The present invention is intended to remove foreign matter such as worn powder in a refrigerating cycle and enhance the reliability in a refrigerating cycle using, in particular, HFC refrigerant. In the invention, accordingly, a coil shaped connection piping is provided in at least front portion or rear portion of a throttling unit, a fine pipe is connected to a lower portion of the connection piping, and a collector for collecting foreign matter in the refrigerating cycle is coupled to this fine pipe. Foreign matter in the refrigerant is separated from the refrigerant by centrifugal force, and is collected in the collector. Moreover, the foreign matter collecting effect is enhanced by disposing a magnetic piece in the collector.

Abstract: The present invention relates to a rotary piston pump for conveying and/or metering liquid or pourable media. It consists of a pump casing (2) with a cylinder chamber (4) having a cylindrical inner periphery (6) into which open at least one inlet (8) and at least out outlet (10), and a rotary piston (20) rotating inside the cylinder chamber (4) which, together with at least one region of its outer peripheral surface (22) forms a seal with the inner peripheral surface (6) of the cylinder chamber (4) and is separated in regions from the inner peripheral surface (6) by a radial stroke distance. When the rotary piston rotates (arrow 70), an expanding working chamber (24) is formed in the region of the inlet (8) to draw the medium in and, on further rotation, contracts again in the region of the outlet to force the medium out.

Abstract: A sealed compressor for use in an air conditioner or a refrigerator. The sealed compressor has an electrically driving portion which includes a rotor having a dust reservoir for collecting and storing dust or the like, which reservoir is formed in the central part of the rotor. Further, the dust reservoir is connected to a through hole, in which lubricating oil flows, of a driving shaft through a horizontal hole. Thus, dust contained in lubricating oil are moved outward by centrifugal force. Further, when dust enter the dust reservoir, such dusts are stored therein. Furthermore, the stored dust cannot get out of the dust reservoir. As the result, dust contained in the lubricating oil can be prevented from getting into the sliding portion. Moreover, the sliding portion can be prevented from being damaged by dust contained in the lubricating oil. Consequently, a sealed compressor with high reliability can be provided.

Abstract: A rotary lobe pump has a pair of rotary lobes rotatably mounted in a pump chamber having end walls perpendicular to axes of the lobes and a side wall with which the rotors making sealing contact. At least one of the end walls is provided with a shallow groove in a region between the axes, the groove being of a selected depth and width to permit solid material lodged between the rotors and at least one of the end walls to become disengaged and flushed out while allowing a minimum of fluid to flow through the groove causing pressure loss in the pump.

Abstract: A rotary vane pump has a hollow rotor and a stationary liquid distributor member within the hollow rotor center, within which member plural supply and discharge fluid paths are provided. An elliptical housing allows for any one pumping chamber defined between adjacent slidable vanes to undergo plural pumping cycles. The novel pump is suited to operate under conditions of low inlet pressure and high discharge pressure, and is usable with incompressible liquids. The elliptical housing is formed by a boundary ring located within a pump casing, the boundary ring having an elliptical inner surface and a cylindrical outer surface. The pump may selectively include structure for enabling separation of particulate material from pumped liquids by the use of centrifugal force. The particulate material enters an opening in the boundary ring, the opening being connected by a passageway in the pump casing to a removable particulate collection chamber connected to the pump casing.

Abstract: A multistage vacuum pump including a plural set of two lobe type vacuum pumps arranged on a common shaft for rotors and in a common casing. The adjacent pumps are connected in series with each other through a communicating passage formed in a pump casing. A solid material collector having a cooling device is provided in the communicating passage so that it is dismountable from the pump casing. A solid component in a compressed gas is forcibly produced by and adhered to the solid material collector. Thus, it is not necessary to disassemble the pump casing for cleaning the same.

Abstract: A multistage vacuum pump with a case with at least two pump chambers in the case, and with at least one passage connecting the pump chambers together. To detect fouling in the especially sensitive connecting passages in a simple manner, it is proposed to configure the passages as part of bores leading to the outside, which can be closed with a plug.

Abstract: A single rotary pump is provided with a driven valve having outer curved faces and inner curved recesses along the major axis thereof, a rotary piston having vanes between which there are semi-ellipses having raised portions therebetween, said valve being driven by an external source to cause rotation of said piston whereby liquid under pressure flows from an inlet of the pump to an outlet of the pump.

Abstract: A silencer-carrying rotary vane pump wherein a hollow portion is provided between inner and outer circumferential walls of a cylindrical center case of the vane pump. The hollow portion is closed with side covers to form a sealed chamber through which a pumped out medium is discharged to the outside. A plurality of partitions may be provided in a portion of the sealed chamber to divide the sealed chamber into a plurality of sealed compartments, with adjacent compartments being in communication with each other by a passage having a small cross-sectional area. Soundproof members may be provided in the sealed compartments and an additional discharge port may be provided for communicating the sealed chamber with the outside of the pump.

Abstract: An oil separator for separating oil from exhausted gas containing refrigerant gas and fine particles of oil incorporated in the refrigerant gas including grooved plates each formed with a multiplicity of grooves on opposite surfaces to allow the exhausted gas to flow in a direction substantially at right angles to the grooves, whereby the fine particles of oil can be trapped by the grooved plates. The oil separator can achieve increased oil separation efficiency.

Abstract: A screw is adapted to cooperate with a casing and at least one pinion-wheel for compressing or expanding a fluid within the space located between two screw threads, the casing and a tooth of the pinion-wheel. The casing and crests of the threads carry two cooperating surfaces, and at least part of one of the surfaces comprises lands defining continuity of the surface but being discontinued along any circle centered on the axis of the screw. The lands separate cells which trap formative seizure particles and, thus, reduce the clearance needed between the screw and the casing.

Abstract: A screw is adapted to cooperate with a casing and at least one pinion-wheel for compressing or expanding a fluid within the space located between two screw threads, the casing and a tooth of the pinion-wheel. The casing and the crests of the threads carry two cooperating surfaces, and at least part of one of the surfaces comprises lands defining continuity of the surface but being discontinued along any circle centered on the axis of the screw. The lands separate cells which trap formative seizure particles and, thus, reduce the clearance needed between the screw and the casing.

Abstract: Combined vapor pump and a liquid driven motor for driving same. A combined motor and pump, as aforesaid, is provided as a compact unit which is of sufficiently simple design, and possessed of sufficiently few parts, as to be economical in manufacture while being effective in operation and capable of long life with a minimum of maintenance. The unit is made in three basic components, namely a motor component, a pump component and a conduit component positioned between the motor and pump components whereby the manufacture and assembly of said components may be carried out quickly and efficiently and whereby, further, a malfunctioning unit can be quickly and easily repaired by replacing in a simple manner the malfunctioning component thereof. Means comprising a chamfer in the body structure adjacent the vanes of the motor are provided to minimize the deleterious effect of dirt or grit entering into the motor from the liquid used for driving same.

Abstract: Feeding means supplies lubricant to a lubricant metering pump on a machine or engine which contains at least one shaft of which a bearing surface is mounted in a journal bearing and is pressure-lubricated.

Abstract: A rotary gear pump comprising two excentrically arranged gear wheels of different sizes, of which the greater gear wheel is rotatably mounted in the generally cylindrical housing of the pump and the smaller gear wheel is mounted upon a shaft which is arranged excentrically in the housing of the pump in such a way that the teeth of the two gear wheels, in the working condition of the pump, are mutually engaged along an area of the inner circumference of the housing of the pump between the outlet of the pump and the inlet of the pump, and are arranged with an interspace between the top circles of the teeth along another part of the circumferences of the wheels, a blocking member being arranged in the interspace with one surface of the blocking member sealing against teeth of the smaller gear wheel and with another surface of the blocking member sealing against teeth of the greater gear wheel, wherein the shaft and the blocking member are mounted rotatably in the housing about the axis of the greater gear wheel

Abstract: A pump for use in a paint application apparatus which is so constructed that there is provided a clearance between an appropriate portion of an internal surface of a casing of the pump and an external periphery of protruded portions of a rotor of the pump, and there is provided another clearance between an internal periphery of the protruded portions of the rotor and an external periphery of a cylinder section of a grand box of the pump. Further, in the pump, an appropriate portion of the internal surface of the casing of the pump, the external and internal peripheries of the rotor of the pump and the external periphery each of the cylinder section of the grand boxes are made hard by quenching, applying thereto an extremely hard alloy or spraying thereonto a hard material such as molybdenum.