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Match Document Document Title
7618245 Fluid machine  
Oil supply grooves ( 74, 84 ) are formed respectively in a rotating shaft ( 70 ) of a compression mechanism ( 50 ) integral with an electric motor ( 40 ) and in a rotating shaft ( 80 ) of an...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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),...
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...
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...
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...
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...
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...
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...
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...
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...
4764094 Screw machine having a plurality of symmetrically arranged rotors  
The screw machine comprises consecutively mounted screw mechanisms (6, 7 and 8, 9) incorporating coaxially arranged stators (10, 12 and 14, 16) and rotors (11, 13 and 15, 17) disposed therein whose...
4711006 Downhole sectional screw motor, mounting fixture thereof and method of oriented assembly of working members of the screw motor using the mounting fixture  
A downhole motor includes a bearing unit connected to a moving section incorporating successively arranged working members--a stator and a rotor interacting with each other along profile surfaces....
4650405 Scroll pump with axially spaced pumping chambers in series  
A multiple-turn scroll pump comprises a pumping unit on each lateral side of a base plate of an oscillatable scroll piston driven by an eccentric drive. Each pumping unit includes a spirally shaped...
4619594 Stackable rotary vane pump with improved volumetric efficiency  
A rotary vane pump includes a shaft of uniform diameter over at least the portion of its length passing through a cavity in a liner member which is eccentric to the shaft and a pair of end bearings...
4611975 Scroll type compressor or pump with axial pressure balancing  
The problem of axial deflection of scrolls having interfitting vanes in a scroll type apparatus acting as a compressor or a pump due to elevated pressure at the interface between the scrolls is...
4585401 Multistage helical down-hole machine with frictional coupling of working elements, and method therefor  
A helical down-hole machine comprises a plurality of sections, each such section having a helical rotor and a helical stator arranged with a preselected eccentricity to form cavities of variable...
4580955 Eccentric screw pump for the conveying of liquids from bore holes  
Disclosed is an eccentric screw pump for conveying liquids from bore holes, in particular oil well bores. The pump includes an eccentric screw, a stator associated with the screw and located at the...
4477238 Scroll type compressor with wrap portions of different axial heights  
A scroll type compressor is disclosed which includes a housing, a fixed scroll and an orbiting scroll. The fixed scroll is fixedly disposed relative to the housing and has a circular end plate from...
4457674 High efficiency scroll type compressor with wrap portions having different axial heights  
An efficient scroll type compressor is disclosed which has a large number of spiral turns, yet yields gradual, controlled compression. The compressor includes a housing, a fixed scroll and an...
4192152 Scroll-type fluid displacement apparatus with peripheral drive  
Peripherally-driven scroll apparatus. The orbiting scroll member is attached through radially-compliant linking means to eccentrics mounted on three equally spaced crankshafts to accommodate...
3994633 Scroll apparatus with pressurizable fluid chamber for axial scroll bias  
A positive fluid displacement apparatus employing scroll members having interfitting spiroidal wraps angularly and radially offset such that as one of the scroll members is orbited, moving fluid...
3951576 Rotary diaphragm pump  
The rotation of a helix within a deformable tube which is located within and attached by the ends to a pump casing of circular cross section causes fluid to flow between the tube and pump casing...
3922120 Rotary engines  
A rotary engine having a housing with a four-lobed cavity therein and a three-lobed rotor disposed in the cavity, the cavity and the rotor having cooperating surfaces all of which are sections of...
3873245 STEAM-DRIVEN ENGINE  
A positive-displacement, steam-driven engine has a generally-elliptical rotor which is mounted on a shaft that is eccentric of a cylindrical chamber. The rotor has an elongated slot which is...
3829256 DISPLACEMENT MACHINE  
A displacement machine comprising a displacement chamber subdivided into at least two series connected consecutively arranged chamber sections. Each of the chamber sections is bounded by an outer...
3802809 COMPLETELY DRY AND FLUID-TIGHT VACUUM PUMPS  
A completely dry and fluid-tight vacuum pump having a cycle of circular translation movement and comprising a fixed body having a fixed disc provided on at least one of its sides with a projection...
Matches 1 - 50 out of 72 1 2 >