Matches 1 - 50 out of 129 1 2 3 >


Match Document Document Title
US20110300008 COMPACT CABLE SUSPENDED PUMPING SYSTEM FOR LUBRICATOR DEPLOYMENT  
A method of installing or retrieving a pumping system into or from a live wellbore includes connecting a lubricator to a production tree of the live wellbore and raising or lowering one or more...
US20110293459 Screw pump with field refurbishment provisions  
A screw pump (20) with field refurbishment provisions has screws (40), a base (26), and shafts (50) for the screws (40). The screws (40) have helical flights that intermesh during rotation, and...
US20080080996 Screw rotor  
The present invention is to provide a screw rotor including a resin rotor formed around a metallic shaft without generation of cracks. Spiral chamfers are formed on surfaces of metallic shafts...
US20120237382 SCREW EXPANDER SYSTEM  
A screw expander system includes a screw expander provided with an expansion space for expanding an operating medium, an operating medium inlet, an operating medium outlet, oil inlets, and oil...
US20120230857 WATER INJECTION TYPE SCREW FLUID MACHINE  
A screw fluid machine has a first non-contact seal, a second non-contact seal and a lip seal disposed between a rotor chamber and a bearing for a rotor shaft located on the high pressure side, and...
US20080056927 PUMP  
In a pump with a housing composed of two intersecting cylinder sections, having provided on mutually opposite sides inlet and outlet ports and having in each cylinder section a rotor rotatably...
US20060078453 Mechanism of the screw rotor  
A screw-rotor machine having a male rotor and a female rotor formed by a number of helical lobs or ribs and a like number of intervening helical grooves; the profiles of male rotor and female...
US20080175739 SUPERCHARGER WITH HEAT INSULATED GEAR CASE  
A positive displacement supercharger includes a housing having a rotor cavity. A pair of positive displacement rotors are oppositely rotatable in the rotor cavity and have interleaved helical...
US20120100029 SCREW COMPRESSOR  
In order to prevent deterioration in performance of an oil-free screw compressor and scuffing caused by rust, surfaces of both male and female rotors are coated with heat-resistance coatings...
US20090304538 MODULAR MULTI-ROTOR COMPRESSOR AND METHOD OF MANUFACTURE  
A multi-rotor compressor and method of manufacturing is provided. The compressor includes a housing with a plurality of identical planet rotors. The planet rotors are equally spaced apart at a...
US20140341710 CENTRIFUGAL REFRIGERANT VAPOUR COMPRESSORS  
A refrigerant compressor (10) for use in a chiller-heater system that can provide chilled water at less than 10° C. and hot water at more than 80° C. without the need for additional heat input,...
US20080038132 Rotary Dry Vacuum Pump  
Conventionally, when a canned motor is used in the drive part of a rotary dry vacuum pump, there is found a problem that reaction produced gas flows into the interior of the canned motor to...
US20120156078 Progressing Cavity Pump/Motor  
A progressing cavity pump/motor (10) includes a stator housing (12), a polymeric layer (14), and a rotor (16). A plurality of axially extending grooves (24) are formed in the interior surface of...
US20100021332 SCREW PUMP  
A screw pump includes a casing including a main accommodating bore and plural sub accommodating bores, a main rotor adapted to be rotatably accommodated in the main accommodating bore, and plural...
US20070041861 Screw rotor and vacuum pump  
The invention provides a low-cost screw rotor that is capable of compressing gas. As exemplified in FIG. 4, screw rotors (26, 27) comprise: upstream screw section (43a) defined on the upstream...
US20090232689 SUPERCHARGER WITH OUTLET BARS FOR ROTOR TIP SEAL SUPPORT  
The invention is to reduce flutter and wear and improve the serviceability and wear life of tip seals for roots blower and screw type compressor superchargers where used for improved supercharger...
US20090016920 SCREW PUMP AND SCREW GEAR  
A screw pump is provided with a pair of screw rotors serving as fluid transfer bodies. With respect to a rotation angle (x) around an axis of each of the screw rotors, a change of a lead angle (θ)...
US20090257902 COMPRESSOR DEVICE  
An improved multi-stage compressor device for compressing gas, which compressor device (1) mainly consists of at least two compressor elements (2-5-28) placed in series one after the other, at...
US20090311119 Screw Compressor Capacity Control  
A screw compressor has a housing (22; 302) having first (53; 330) and second (58; 340) ports along a flowpath. A first rotor (26; 306) has a lobed body. A second rotor (28; 308, 310) has a lobed...
US20090004036 Helical Screw Compressor  
A screw compressor with two rotors held in a rotor housing has sealing arrangements 11, 11′ to seal the pressurized side shaft pin of the rotors, wherein each sealing arrangement has a number of...
US20050244294 Screw fluid machine  
A screw fluid machine includes a screw-shaped male rotor having formed helically therearound teeth and a screw-shaped female rotor having formed helically therearound grooves. The female rotor is...
US20120121450 SCREW SPINDLE PUMP ARRANGEMENT  
A screw spindle pump arrangement includes a low-pressure connection, a high-pressure connection, a drive spindle, and at least one idling spindle. A feed section of the idling spindles is divided...
US20090004038 Liquid-Cooled Rotor Assembly for a Supercharger  
A rotor assembly for a supercharger assembly is provided. The rotor assembly includes at least one lobe defining at least one cavity. The at least one cavity is configured to contain a fluid...
US20120288395 Screw Spindle Machine and Method of Manufacturing the Same  
A screw spindle machine having a tubular casing (10) that is made of cast metal and is lined with a wear resistant layer (16), with the wear resistant layer (16) being encapsulated in a steel...
US20080302129 Refrigeration system for transcritical operation with economizer and low-pressure receiver  
A refrigeration apparatus for transcritical operation includes a gas cooler, an aftercooler, an evaporator with a low-pressure liquid separator, a compressor, a first controllable throttling...
US20140010698 Multiple Segment Lobe Pump  
Designs for multiple segment lobe pumps are shown. The designs include pumps using rotors having two lobes to a plurality of lobes and segments that include two segments to a plurality of...
US20060083651 Composite dry vacuum pump having roots rotor and screw rotor  
Disclosed is a dry vacuum pump for evacuating a processing chamber in semiconductor or display manufacturing device, or for evacuating the gaseous substance and/or the byproducts generated in...
US20090148331 Roots type gear compressor with helical lobes having feedback cavity  
A gear compressor or supercharger for compressing compressible fluids such as air, having a pair of intermeshing helical lobed rotors. A plenum or cavity is provided at a rear end of the gear...
US20120134867 DRY PUMP  
The present invention provides a dry pump including: a center cylinder which includes: a plurality of pump chambers containing an upper stage pump chamber that communicates with an intake port and...
US20080199340 Screw Displacement Pump  
The invention relates to a screw pump of single-entry, double-shaft construction with an external bearing of the two screw shafts (1, 2) and a pump housing (3) enclosing the screw shafts (1, 2) by...
US20080279708 Screw Compressor with Oil Feed System  
A rotary screw compressor with an oil feed system that has a plurality of oil orifice nozzles to feed oil to the compressor rotors and the compressor bearings. One of the oil orifice nozzles is...
US20090252627 Compressor Assembly Comprising a Valve Unit in the Intake Region  
An air compressor assembly includes a compressor housing, an intake port defined by the compressor housing for intake of the air, and a plurality of guide contours disposed adjacent to the intake...
US20110073081 Supercharger Cooling  
A supercharger cooling system provides a path for coolant from an air/coolant heat exchanger to a supercharger intercooler and loops around a hot outlet end of a screw type supercharger and back...
US20120114514 Hydraulic Toothed Wheel Machine  
A toothed wheel machine including a housing for receiving two meshing and especially helical-toothed wheels. The toothed wheels are axially mounted in sliding manner by axial surfaces between...
US20060165543 Screw compressor acoustic resonance reduction  
A screw compressor for acoustic resonance reduction and refrigeration systems including the screw compressor are disclosed. The screw compressor has an acoustic barrier integral with the...
US20080063554 PRECISION FLOW GEAR PUMP  
A positive displacement gear pump including a pump housing having an inlet port, an outlet portion, and first and second pumping chambers. A first gear having helical teeth is engaged with an...
US20080060623 SUPERCHARGER WITH GEAR CASE COOLING FAN  
A positive displacement supercharger includes a housing having a rotor cavity. A pair of positive displacement rotors carry air from an inlet end to an outlet end of the cavity. A gear case...
US20080314055 Refrigerant System Unloading By-Pass Into Evaporator Inlet  
A refrigerant system has at least one unloader valve selectively communicating refrigerant between the compressor compression chambers and a point upstream of the evaporator. When the compressor...
US20120148435 SCREW COMPRESSOR  
Provided is a screw compressor, accommodating a pair of rotatable male and female screw rotors in a compression chamber formed in a casing, wherein the casing includes: an internal dividing wall...
US20080166253 Oilless Screw Compressor  
An oilless screw compressor incorporating water-cooled cooling units for cooling compressed air discharged from compressor bodies having a pair of male and female screw rotors which can be rotated...
US20110243781 OILLESS SCREW COMPRESSOR AND COMPRESSED AIR COOLING UNIT  
An oilless screw compressor incorporating water-cooled cooling units for cooling compressed air discharged from compressor bodies having a pair of male and female screw rotors which can be rotated...
US20120227437 STATIONARY VOLUME RATIO ADJUSTMENT MECHANISM  
A screw compressor with a volume ratio adjustment mechanism. The volume adjustment mechanism is a penetration in the housing of a screw compressor. The penetration includes one or more apertures....
US20080112832 HERMETIC SCREW COMPRESSOR  
A hermetic screw compressor comprises a male rotor, a female rotor engaging the male rotor, an electric motor connected to a low pressure side shaft portion of the male rotor, a low pressure side...
US20100310402 SCREW COMPRESSOR  
The invention revealed a screw compressor and its electrical control system and related control methods. The system comprises a power module, a high-low (tension) transformer and a compressor...
US20080253914 LIQUID INJECTION TYPE SCREW COMPRESSOR  
A liquid injection type screw compressor in which, in a compression stroke of an working space formed by male and female rotors, liquids such as oil or water is prevented from leaking from the...
US20150132171 ROOTS-STYLE BLOWER WITH LEAKAGE MECHANISMS  
The disclosure concerns a Roots-type blower comprising a housing defining first and second transversely overlapping cylindrical chambers and at least one inlet port and an outlet port; first and...
US20110058974 OPTIMIZED HELIX ANGLE ROTORS FOR ROOTS-STYLE SUPERCHARGER  
A Roots-type blower has first and second meshed, lobed rotors disposed in first and second chambers of a housing. Each lobe has first and second axially facing end surfaces defining a twist angle...
US20130129548 TWO-STAGE MEDIUM-PRESSURE SCREW-TYPE AIR COMPRESSOR SET  
A two-stage medium-pressure screw air compressor comprises a primary screw compressor (21) and a secondary screw compressor (22) communicating with the gas-liquid separator (6) via the first...
US20120171068 Displacement Pump with Internal Compression  
The invention relates to a dry-compressing dual-shaft rotary displacement screw spindle pump machine for delivering and compressing gases. The spindle rotor pair therein includes multiple stages,...
US20100254836 Oil-Cooled Screw Compressor  
In an oil-cooled screw compressor comprising, a compressor body including a pair of a male rotor and a female rotor, a motor including a stator and a motor rotor connected to one of the male and...

Matches 1 - 50 out of 129 1 2 3 >