Class 418/5 - MULTISTAGE

Subclass of Class 418 - Rotary expansible chamber devices
Definition: Apparatus in which there is provided a plurality of working
No. of patents: 52
Last issue date: 07/29/2008

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Number	Title	Issue Date
7404705	Blending pump assembly A blending pump assembly for accurately maintaining the proper ratio of two fluid components. Flow of a first fluid is utilized to drive a fluid motor, which in turn drives a pumping mechanism to inject a proportional amount of a second fluid into the flow of the fi...	07/29/2008
7381036	Motor-pump unit A motor-pump unit is provided that has at least two internal gearwheel pumps axially aligned that are driven off of the rotor of the electric motor. The rotor of the electric motor is U-shaped and is concentrically disposed about the pump. The web of the U-shape is ...	06/03/2008
7367790	Double-acting type orbiting vane compressor The double-acting type orbiting vane compressor comprises an orbiting vane having upper and lower circular vanes formed at the upper and lower surfaces of a vane plate of the orbiting vane, respectively, the orbiting vane being attached to a crankshaft rotatable by ...	05/06/2008
7335004	Apparatus for varying capacity in scroll compressor An apparatus for varying the capacity in a scroll compressor, the apparatus having an orbiting scroll provided with a wrap filling portion which is stepped at a certain height, extending the entire inside of a wrap from an outer end portion of the wrap; a fixed scro...	02/26/2008
7293970	Two-stage rotary compressor An oil supply hole connecting an oil reservoir to a suction port formed in a lower supporting member of a two-stage rotary compressor is disclosed. The suction port is provided in the lower supporting member attached to the lower side of a high stage side rotary com...	11/13/2007
7210913	Scroll fluid machine with a silencer A scroll fluid machine comprises a housing, a drive shaft, a stationary scroll fixed to the housing, and an orbiting scroll driven by the drive shaft. A gas from the outer circumference of the housing is introduced between the stationary and orbiting scrolls, and se...	05/01/2007
7189066	Light gas vacuum pumping system A vacuum pumping system includes a primary vacuum pump having an inlet for coupling to a system, and a secondary vacuum pump having an inlet coupled to the exhaust of the primary vacuum pump. The primary vacuum pump is an oil-free, positive displacement vacuum pump ...	03/13/2007
7172395	Scroll-type fluid machine A fixed scroll (40) is provided which is made up of a first stationary-side member (41) and a second stationary-side member (46). The first stationary-side member (41) has a first stationary-side wrap (42) and a first outer periphe...	02/06/2007
7156922	Multi-chamber installation for treating objects under vacuum, method for evacuating said installation and evacuation system therefor A multi-chamber installation (1) treats objects under vacuum. An evacuation system (5) is connected to a plurality of chambers (2, 3, 4). To reduce the complexity of the evacuation process, a forepump (5) has several stages (11, 12, 13...	01/02/2007
7131826	Blending pump assembly A blending pump assembly for accurately maintaining the proper ratio of two fluid components. Flow of a first fluid is utilized to drive a fluid motor, which in turn drives a pumping mechanism to inject a proportional amount of a second fluid into the flow of the fi...	11/07/2006
7108492	Roots pump A roots pump has a housing, a plurality of rotary shafts, a rotor, a confluent passage and a closed space. The housing forms therein a pump chamber. The rotary shafts are supported on the housing in parallel relation to each other. The rotor is mounted on each of th...	09/19/2006
7059294	Orbital engine An engine is disclosed including at least one piston which is positioned within a toroidal piston chamber. A method of operating an engine is disclosed wherein a piston is advanced in a toroidal piston chamber past a first valve and the first valve is closed to form...	06/13/2006
7019412	Power generation methods and systems A closed loop system for generating mechanical energy at high efficiencies. The system can have a heating source, a superheater, an expander, a receiver, an absorber, a desorber, and regenerator with pumps and controls. The superheater heats a working fluid (a refri...	03/28/2006
7007505	Refrigerating device A refrigerating device including a refrigerating cycle including a plurality of compressors driven by motors, the plurality of compressors comprising a variable speed compressor which can be controlled in capacity and a constant speed compressor which is driven by a...	03/07/2006
6931866	Multistage compression type rotary compressor and cooling device A multi-stage compression type rotary compressor, having a driving element and a first and a second rotary compression element that are driven by the driving element in a sealed container, is provided. The refrigerant compressed by the first rotary compression eleme...	08/23/2005
6929455	Horizontal two stage rotary compressor A hermetic two stage rotary compressor having a housing with a stationary shaft fixedly mounted in the housing. A motor having a rotor and a stator is mounted in the housing with the rotor being rotatably mounted on the shaft. A pair of compression mechanisms are ro...	08/16/2005
6887058	Fluid machinery A fluid machinery includes a helical mechanism connected to a driving mechanism, which is driven via a crank shaft. The helical mechanism includes a cylinder defining an inner space, a roller disposed inside the cylinder so as to be rotated in an eccentric manner, t...	05/03/2005
6884047	Compact scroll pump A compact scroll pump includes a scroll set having an inlet and an outlet, and a drive mechanism. The scroll set includes a stationary scroll blade extending from a stationary plate and an orbiting scroll blade extending from an orbiting plate. The stationary and or...	04/26/2005
6764288	Two stage scroll vacuum pump Vacuum pumping apparatus includes a scroll set having an inlet and an outlet. The scroll set includes a first stationary scroll blade and a second stationary scroll blade extending from a stationary plate and separated by a gap, and an orbiting scroll extending from...	07/20/2004
6752605	Horizontal two stage rotary compressor with a bearing-driven lubrication structure A hermetic rotary compressor including a housing having an oil sump formed therein; a stationary shaft fixedly mounted in the housing, a longitudinal bore formed in the shaft; and a motor mounted in the housing, the motor having a rotor and a stator, the rotor havin...	06/22/2004
6699022	Vacuum exhaust apparatuses and vacuum exhaust methods A vacuum exhaust apparatus includes an oil-sealed rotary pump with a gas inlet for taking a gas into the pump. The gas inlet has a gas inlet flange to join with a flange of a gas inlet pipe for guiding the gas to the pump. An oil supply section connects w...	03/02/2004
6638040	Dry vacuum pump A dry vacuum pump comprises a scroll-type vacuum pump and a rotary-vane vacuum pump, wherein the rotary-vane vacuum pump is mounted on the side of an inlet, whereas the scroll-type vacuum pump is mounted on the side of an outlet, and then a compound-type ...	10/28/2003
6439864	Two stage scroll vacuum pump with improved pressure ratio and performance A scroll vacuum pump includes a first stage having a first stage fixed plate with a spiral involute, a second stage having a second stage fixed plate with a spiral involute wrap, and an orbiting plate having upper and lower surfaces. An involute spiral ex...	08/27/2002
6267572	Scroll fluid machine having scroll members at each end of a rotating hollow shaft A scroll fluid machine requiring no crank shaft to orbitably support an orbiting scroll member and capable of being reduced in overall size in the axial direction. In a casing, two fixed scroll members are provided on the axis of the casing, and an electr...	07/31/2001
6174440	Device and method for processing a fluid by two-phase compression and fractionation The invention is a device for processing a fluid F comprising at least one fraction A to be separated, the fraction to be separated being soluble in a solvent phase. The device includes at least one delivery for the fluid F to be processed; at least one d...	01/16/2001
6164939	Scroll pump A scroll pump comprising a fixed scroll, an orbiting scroll orbiting with a radius which is the same as the eccentric distance of an eccentric shaft to the center of the fixed scroll and contacting the fixed scroll, an inlet port formed in the middle of t...	12/26/2000
6123526	Multistage pump and method for assembling the pump A multistage pump includes a shaft assembly and a housing and spacing plates. The shaft assembly completed by forming shafts and rotors integrally. The spacing plates defining a plurality of successive compression chambers, each chamber is delimited by tw...	09/26/2000
6113358	Scroll compressors A method of improving the efficiency of a pair of first and second scroll refrigeration compressors, at least the second of which includes an intermediate port is characterized in that the delivery of the first scroll compressor is fed into the intermedia...	09/05/2000
6050792	Multi-stage scroll compressor A scroll is provided which can be operated as either a vacuum pump, a low pressure compressor or a high pressure compressor. The scroll includes a housing, a fixed scroll plate having a continuous fixed involute wrap and an orbiting scroll plate having a ...	04/18/2000
5961297	Oil-free two stage scroll vacuum pump and method for controlling the same pump An oil-free two-stage vacuum pump includes first and second pump stages coupled in series. The first and second pump stages have discharge spaces capable of communicating with each other via a bypass passage. The bypass passage is provided with a pressure...	10/05/1999
5951268	Sperial vacuum pump having a metal bellows for limiting circular translation movement A vacuum pump with circular translation cycle comprises a stationary body (10) with a stationary disc (13, 14) that includes, at least on one side thereof, a spiral-shaped projection (23, 24, 25), a movable disc (30) facing the stationary one (13, 14) and...	09/14/1999
5947694	Scroll-type vacuum pumping apparatus Vacuum pumping apparatus includes a non-scroll type auxiliary pump and a scroll pump disposed in a single housing. The auxiliary pump and the scroll pump are connected in series and are driven by a common motor. Typically, the auxiliary pump has a relativ...	09/07/1999
5855473	High displacement rate,scroll-type, fluid handling apparatus A fluid handling apparatus, particularly a vacuum pump, has as a first stage a high volumetric displacement rate scroll pump of multiple nested interacting pairs of fixed and movable spiral-shaped blades supported in a housing between an inlet and an outl...	01/05/1999
5616015	High displacement rate, scroll-type, fluid handling apparatus A positive displacement fluid handling apparatus has a first, high volumetric displacement rate scroll pump of nested interacting pairs of fixed and movable spiral-shaped blades supported in a housing between an inlet and an outlet. Each adjacent blade pa...	04/01/1997
5588818	Rotor-to-rotor coupling A rotor to rotor coupling providing a connecting rod having longitudinal grooves mating to longitudinal grooves in a rotor end. The mated grooves forming chambers for which pins are received therein. A rotor cap secures the captured pins within the chambe...	12/31/1996
5304047	Scroll compressor of two-stage compression type having an improved volumetric efficiency A scroll compressor has first, second and third scrolls. The second and third scrolls each have a spiral ridge on a flat plane and the first scroll has two spiral ridges on opposite sides of a flat plate. The second and third scrolls are arranged on both ...	04/19/1994
5299922	Positive displacement rotary pump An eccentric drive rotates inside a ring that is hinged to a plate and an astomeric curtain is wrapped around the ring and across an articulated plate. The curtain moves along a cylindrical wall inside the pump cavity to move fluid from an inlet to an out...	04/05/1994
5195880	Eccentric screw pump with reversible rotor An eccentric screw pump comprises at least one stator, a rotor having a core and received for eccentric rotation in the stator, a first coupling device adapted to connect one end of the rotor to a drive system, a second coupling device provided at another...	03/23/1993
5071327	Two speed gerotor motor with centrally located valve and commutator This gerotor-type hydraulic motor operates at two speeds (low speed, high torque and high speed, low torque) at a given flow rate and pressure of driving hydraulic fluid. It includes first and second rotating power elements disposed along an axis. Between...	12/10/1991
4846638	Rotary fluid machine with pivoted vanes A rotary fluid machine comprising a housing, a drive disk, a drive shaft, inner and outer cylindrical assemblies, and a plurality of vanes. The drive disk is supported within the housing for rotation about a first axis, and the drive shaft is connected to...	07/11/1989

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Class 418/5 - MULTISTAGE