| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 417254000 |
Reciprocating rigid stages
| 26 |
| 417253000 |
Condition responsive control of fluid
| 7 |
| 417245000 |
Fluid motor for one stage supplied from another stage
| 7 |
| 417246000 |
Stages driven by relatively movable motor working members
| 7 |
| 417251000 |
With interstage discharge or additional discharge from former stage | 5 |
| 20090246040 | Multistage Vacuum Pump Unit and an Operation Method Thereof - A multistage vacuum pump unit can save a power requirement and prevent the gas discharged outside of the unit from flowing-back inside the pump unit. A plurality of vacuum pumps are connected in series to form the multistage vacuum pump unit. A suction inlet of a first stage vacuum pump thereof is connected to a to-be-vacuumized container so that the space inside of the container becomes under a high vacuum condition. In an operating method, part of the gas discharged into a first intermediate passage from the first stage vacuum pump is branched during a low vacuum operation, and discharged toward an air atmosphere through a low conductance line provided with check valves that prevent the branched gas from flowing back. | 10-01-2009 |
| 20080206072 | Vacuum Apparatus - An object of this invention is to provide a vacuum apparatus used in the field of semiconductor production and capable of suppressing power consumption. | 08-28-2008 |
| 20090263258 | VIBRATION DAMPENING MEDIA IN HYDRAULIC POWER UNITS - A hydraulic power unit that uses a quantity of media within a cavity adjacent to and surrounding a hydraulic assembly in the housing of the hydraulic power unit to reduce the overall noise of the unit. Additionally, the cavity either seals the media from the moving parts of the hydraulic assembly or isolates the media from the moving parts of the hydraulic assembly to ensure damage to the hydraulic assembly does not result. | 10-22-2009 |
| 20140064989 | HIGH-PRESSURE FUEL PUMP DEVICE - A high-pressure fuel pump device of the invention includes a plunger-type high-pressure pump unit ( | 03-06-2014 |
| 20150086393 | OIL PUMP FOR VEHICLE - An oil pump for the vehicle includes: a first oil pump configured to pressurize oil and discharge the pressurized oil; a second oil pump connected with the first oil pump so as to be operated by receiving power from the first oil pump, and configured to pressurize oil and discharge the pressurized oil; and a connection path configured to connect the second oil pump to the first oil pump in order to supply the oil discharged from the second oil pump to the first oil pump, to decrease power loss and be formed to be compact. | 03-26-2015 |
| 417248000 |
Parallel stages to or from single stage | 1 |
| 20090175738 | Process and Device for the High-Pressure Delivery of a Fluid Mixture and Use of Same - A method for the high-pressure delivery of a mixture comprises delivering at least first and second fluids. The method comprises operations consisting in forming a mixture of fluids in a mixing zone having a pressure that is less than the desired high pressure and bringing the pre-mixed fluids to the high pressure. The first fluid is introduced into the mixing zone by a pumping operation that is performed by a high-pressure pump that is positioned downstream of the mixing zone. A device for performing the method is described. | 07-09-2009 |
| 417249000 |
Prior stage delivers to atmospheric chamber | 1 |
| 20120121442 | MULTISTAGE DRY VACUUM PUMP - The multistage dry vacuum pump is disclosed, in which it is possible to prevent a pump from being adhesively stuck, which problem occurs due to a difference in thermal expansions between a cylinder body and a rotor, by making thermal expansion conditions between a cylinder body and a rotor of a pump similar by concurrently cooling the cylinder body and the rotor of the pump, and a high vacuum degree can be obtained by obtaining an optimum gap design in the rotor and the cylinder, respectively, for thereby making the size of the pump smaller and significantly reducing the maintenance cost of the pump facilities. The gas passage for transferring gas compressed by each cylinder is provided at each cylinder body in a shape of surrounding an outer side of each cylinder, and a cooling water jacket for circulating cooling water is provided close to an outer side of the gas passage, and a communication passage is formed at a gas passage contacting with the cooling water jacket and is connected with an exhaust pace of the cylinder. | 05-17-2012 |
| 417250000 |
With interstage intake or additional inlet to latter stage | 1 |
| 20130177453 | PUMPING ARRANGEMENT - A differentially pumped vacuum system includes first, second and third chambers, and a pumping arrangement for evacuating the chambers. The pumping arrangement includes a compound pump having a first inlet connected to an outlet from the first chamber, a second inlet connected to an outlet from the second chamber, a first pumping section and a second pumping section downstream from the first pumping section, the sections being arranged such that fluid entering the compound pump from the first inlet passes through the first and second pumping sections and fluid entering the compound pump from the second inlet passes through, of said sections, only the second section. The pumping arrangement further includes a booster pump connected to an outlet from the third chamber, and a backing pump connected to the exhaust from the booster pump. Fluid exhaust from the compound pump can be conveyed to either the booster pump or the backing pump as required. | 07-11-2013 |
| Entries |
| Document | Title | Date |
|---|
| 20080199325 | Compression system, multicylinder rotary compressor, and refrigeration apparatus using the same - An object is to avoid generation of a collision sound of a second vane of a compression system comprising a multicylinder rotary compressor being configured to be used by switching of a first operation mode in which both rotary compression elements perform a compression work and a the second operation mode in which the only first rotary compression element substantially performs the compression work. When the second operation mode is switched to the first operation mode, discharge-side pressures of both the rotary compression elements are applied as a back pressure of the second vane, and thereafter an intermediate pressure is applied which is between suction-side and discharge-side pressures of both the rotary compression elements. When the first operation mode is switched to the second operation mode, a valve device interrupts flowing of a refrigerant into a second cylinder, and thereafter suction-side pressures of both the rotary compression elements are applied as the back pressure of the second vane. | 08-21-2008 |
| 20080206071 | Compression system, multicylinder rotary compressor, and refrigeration apparatus using the same - An object is to avoid generation of a collision sound of a second vane of a compression system comprising a multicylinder rotary compressor being configured to be used by switching of a first operation mode in which both rotary compression elements perform a compression work and a the second operation mode in which the only first rotary compression element substantially performs the compression work. When the second operation mode is switched to the first operation mode, discharge-side pressures of both the rotary compression elements are applied as a back pressure of the second vane, and thereafter an intermediate pressure is applied which is between suction-side and discharge-side pressures of both the rotary compression elements. When the first operation mode is switched to the second operation mode, a valve device interrupts flowing of a refrigerant into a second cylinder, and thereafter suction-side pressures of both the rotary compression elements are applied as the back pressure of the second vane. | 08-28-2008 |
| 20080247885 | West Compression Apparatus and Method - This wet compression invention with a vaporizable fluid mist demonstrates major performance improvements over the relevant art in achieving a high degree of saturation, providing sensible cooling, strongly reducing the temperature increase due to compression work, reducing excess diluent air flow for downstream combustion, reducing compression noise, and increasing the achievable compressor pressure ratio?. These improvements are obtained by one or more of: high mist or overspray from a) progressive axial injection of vaporizable fluid along the streamwise compression flow path, and b) transverse vaporizable fluid delivery from stators, rotors, perforated tubes, and/or duct walls, matching the gaseous fluid flow distribution across the compressor stream; c) reducing the compressor cross-sectional flow area of downstream compressor stages relative to up-stream stages, and d) increasing the rate of downstream vaporizable fluid injection relative to the rate of upstream injection, as a function of each compressor stage pressure ratio. | 10-09-2008 |
| 20090016903 | Precision Pump With Multiple Heads - A high purity, high precision pump capable of pumping more than one type of chemistry or process fluid without requiring cleaning or changing of surfaces contacting the processing fluid. The pump employs a single drive mechanism coupled in parallel with multiple pumping chambers, each capable of handling a different type of manufacturing fluid. The pump can be utilized as part of a single stage or multi-stage pump system. | 01-15-2009 |
| 20090035154 | SERIAL FAN MODULE AND FRAME STRUCTURE THEREOF - A serial fan module includes a first fan, a second fan and a plurality of guide elements which are disposed between the first fan and the second fan. The first fan has a first frame body and a first impeller. The second fan has a second frame body and a second impeller. Each of the guide elements has an axial extended part and an inclined part, and the inclined part meets the axial extended part at a camber angle. The guide elements guide an airflow from the first fan into the second fan. Also, a frame structure is disclosed. The frame structure includes a first frame body, a second frame body and a plurality of guide elements disposed between the first frame body and the second frame body. Each of the guide elements comprises an axial extended part and an inclined part and the inclined part meets the axial extended part at a camber angle. | 02-05-2009 |
| 20090047142 | VACUUM PUMP UNIT - The present invention relates to a dry vacuum pump unit capable of achieving ultimate pressure of about 1 Pa. The vacuum pump unit includes a main pump ( | 02-19-2009 |
| 20090047143 | Method and system for high viscosity pump - Embodiments described herein provide systems and methods for high viscosity pumps including a noncompliant filter. One embodiment can include a multi-stage pump comprising an pump inlet flow path, a pump outlet flow path, a feed stage in fluid communication with the pump inlet flow path, a dispense stage in fluid communication with the feed stage and the pump outlet flow path, a noncompliant disposable filter for high viscosity fluid in a flow path between the feed stage and the dispense stage and a set of valves to selectively allow fluid flow through the multi-stage pump. | 02-19-2009 |
| 20090148311 | AXIAL FLOW FAN UNIT - An axial flow fan unit includes a first and a second axial flow fan. The first axial flow fan includes a first motor, a plurality of first lead lines connected to the first motor, a first impeller rotatable about a center axis by the first motor, and a first housing arranged to enclose the first motor and the first impeller, wherein the first housing has a first recess portion extending from an inside to an outside of the first housing. Likewise, the second axial flow fan includes a second motor, a plurality of second lead lines, a second impeller, and the second housing, wherein the second housing has a second recess portion extending from an inside to an outside of the second housing. The first and the second lead lines are led out from the first and the second housings through the first and the second recesses, respectively. Further, the first recess portion is deviated relative to or partially overlapped with the second recess portion along a circumferential direction. | 06-11-2009 |
| 20090175737 | GROUNDWATER SAMPLING DEVICE - A groundwater sampling and pumping device and system for withdrawing groundwater from a well of small size, not exceeding 1.5 inches I.D. The device includes a hollow outer housing having water inlet ports formed through a bottom thereof and a hollow inner housing sized to be positioned integrally within the outer housing and defining a water flow passage therebetween. An electric motor in the inner housing is connected to a water impeller operably positioned to draw groundwater into the water passage. The water passing upwardly through the water flow passage provides cooling for the motor. Preferably the housing is formed of a polymer material, and/or a metal, such as stainless steel. | 07-09-2009 |
| 20090208349 | Solids handling hydro-finn pump - A flowable materials pump for moving flowable materials includes a substantially tubular pump housing having opposing first and second housing longitudinal open ends; an impeller assembly including an impeller rotatably mounted within and connected to the pump housing through which material flows through and around the impeller; and an impeller drive mechanism extending through the housing wall to and drivably connected to the impeller. The laterally position of the impeller drive mechanism relative to the pump housing permits stacking of the flowable materials pumps in linear series and in mutual fluid communication, so that the desired level of pumping force can be established incrementally by selecting the number of the pumps needed for a given application. | 08-20-2009 |
| 20090220357 | MULTISTAGE COMPRESSOR - The invention relates to a multistage compressor for providing high-pressure gas in filling stations, said compressor consisting of a high-pressure compressor and a multistage booster compressor (W). Both compressors comprise membrane pump chambers which are controlled by camshafts. The booster compressor (VV) can contain a plurality of stages (S | 09-03-2009 |
| 20090246039 | CARRIER ASSEMBLY FOR A PUMP - A pump assembly includes a manifold having an inlet port configured to be coupled to a supply pipe and an outlet port configured to be coupled to a discharge pipe. The pump assembly also includes a cartridge having a pump stack including a plurality of pumping stages. Each pumping stage includes an impeller. The cartridge extends between a first end and a second end. The first end is removably coupled to the manifold. A carrier assembly supports the cartridge. The carrier assembly moves the cartridge between an advanced position and a retracted position. The cartridge engages the manifold in the advanced position and the cartridge is disengaged from the manifold in the retracted position. Optionally, the carrier assembly may include a support frame and at least one rail. The support frame is slidable along the rail and the cartridge is supported by the support frame. | 10-01-2009 |
| 20090257889 | Vacuum Pump - [Problem to be Solved] Stator blade wheels and rotor blade wheels do not interfere with each other using lower-cost but wider cutting-width cutting or grinding for half-cutting-off of the stator blade wheels and not using expensive but narrower cutting-width wire electric discharge machining. | 10-15-2009 |
| 20090311113 | Rotor Assembly - A rotor assembly for a multi-stage pump is provided. The assembly comprises a drive shaft, a rotor component and a drive component. The rotor component is located on the drive shaft and comprises a rotor element for displacing fluid through the pump when the drive shaft is rotated. The drive component is anchored to the drive shaft and transmits torque from the drive shaft to the rotor component to effect rotation of the rotor component. A sleeve element is integrated with either the drive component or the rotor component and is used to space the rotor element from the drive component. An interface surface is located on the sleeve element for interacting with the other one of the drive component and the rotor component in order to maintain orthogonal alignment between the rotor element and the drive shaft. Drive means is provided for transmitting torque between the drive component and the rotor component. | 12-17-2009 |
| 20090324430 | COMPRESSORS UNITS - The invention relates to improvements in compressor units, and in particular to a modular compressor unit which has separate sections for the compressor, the controls and the air intake. The modular compressor unit comprises three separate adjoining sections, being an intake section, a compression section and a control section. The intake section comprises air intake means which provide an inlet for ambient air to be compressed and for cooling the compressor motor and comprise filters to filter air entering the intake means, noise attenuation means provided in the air intake means, and means for directing air to components in the compression section. The compression section comprises a compressor, a motor arranged to drive all compressor and all components within the unit required to cool compressed air, the motor and to remove heat from the compression section. The control section houses all the control means for operating the compressor unit. | 12-31-2009 |
| 20100008796 | PUMP ASSEMBLY AS WELL AS METHOD FOR THE MODULAR CONSTRUCTION OF A PUMP ASSEMBLY - A pump assembly is provided with a pump ( | 01-14-2010 |
| 20100021317 | SERIAL AXIAL FAN - A serial axial fan includes first and second axial fans. Each of the first and second axial fans includes a base portion and a plurality of support ribs arranged to connect the base portions to housings. The first and second axial fans are coupled together with the base portions thereof either in contact with or in close proximity to each other. Each of the support ribs in each of the first and second axial fans extends over both housings of the first and second axial fans. | 01-28-2010 |
| 20100098558 | Vacuum Pump or Vacuum Apparatus with Vacuum Pump - The invention relates to a vacuum pump or vacuum apparatus having a vacuum pump for the evacuation of one or a plurality of volumes, the vacuum pump having a plurality of pressure stages and at least two suction inlets. According to the invention, an outer suction inlet for a first pressure stage spatially encompasses an inner suction inlet for a second pressure stage such that the inner suction inlet seals only against pressure within the outer suction inlet, not against external pressure. | 04-22-2010 |
| 20100119385 | SERIAL AXIAL FAN - A serial axial fan preferably includes a first impeller and a second impeller each having a plurality of blades radially extending with a predetermined rotation axis as the center, a first motor portion, a second motor portion, a first housing, and a second housing. The first motor portion has a first circuit board on which at least one electronic component arranged to control the driving of the first impeller is mounted. The second motor portion has a second circuit board on which at least one electronic component arranged to control the driving of the second impeller is mounted. The first and second circuit boards are electrically connected. The driving of the first impeller and the driving of the second impeller are controlled by the electronic component disposed on at least one of the first and second circuit boards. | 05-13-2010 |
| 20100135826 | FLUID TRANSFERRING SYSTEM AND MICROPUMP SUITABLE THEREFOR - Disclosed herein is a micro fluid transferring system that comprises a micropump having a chamber, a first fluid transferring portion connected to the chamber, and a second fluid transferring portion connected to the chamber. This system is characterized in that at least one of the first and second fluid transferring portions comprises a pressure absorbing section for absorbing or alleviating a liquid vibrational pressure therein. | 06-03-2010 |
| 20100183451 | Hybrid hydraulic-electric engine - An automobile drive engine is described having an electric motor with two hydraulic pumps fixedly mounted on the center shaft of the motor. The smaller sized hydraulic pump is mounted on one side of the electric motor and the larger pump is mounted on the other side of the electric motor. The two hydraulic pumps are connected by hydraulic hoses which allow hydraulic fluid to circulate between the two pumps. As the electric motor begins to turn, it causes the impeller blades of the larger hydraulic pump to rotate forcing hydraulic fluid through the hose thereby building pressure on the impeller blades of the smaller hydraulic pump. The smaller hydraulic pump then begins to rotate. Because of the ratio of sizes, the smaller hydraulic pump begins to rotate much faster increasing the torque and/or speed produced by the electric motor. | 07-22-2010 |
| 20100266426 | Increased volumetric capacity of axial flow compressors used in turbomolecular vacuum pumps - A turbo-molecular vacuum pump of increased pumping capacity has parallel access toward two initial impeller-rotors. An additional annular space is provided around the periphery of the first rotor and the conventional first stator disc is omitted, thus creating an accelerated annual gas flow entering directly into the second rotor without an accumulation of pressure. | 10-21-2010 |
| 20100284831 | ADAPTORS FOR MULTISTAGE PUMP ASSEMBLIES - A pump assembly is configured to fit to a predefined pipe layout defined by supply and discharge interfaces that are positioned in a predefined relation to supply and discharged centerlines, respectively. The pump assembly includes a multistage pump having a plurality of pumping stages mounted along a pump shaft rotating along a rotation axis. The multistage pump has an inlet port and a discharge port, and the multistage pump is aligned horizontally such that the rotation axis is oriented parallel to the supply centerline. The pump assembly also includes an adaptor having a pump interface and a pipe interface, wherein the adaptor has an internal fluid channel extending along a non-linear passageway between the pump and pipe interfaces. The pump interface is coupled to one of the inlet and discharge ports of the multistage pump, and the pipe interface is located proximate one of the supply and discharge interfaces. | 11-11-2010 |
| 20100329896 | MULTISTAGE PRESSURE CONDENSER - According to one embodiment, there is provided a multistage-pressure condenser, including a first condenser, a second condenser and a third condenser, which are arranged in increasing order of internal pressure, the first condenser and the second condenser each including a first partition in which perforations from which condensate obtained by condensing turbine steam by cooling water drops are formed on a cooling water inflow side of the condenser rather than at a central part thereof, and a second partition which partitions a reheating room for reheating condensate dropping from the perforations in a direction perpendicular to an inflow direction of the cooling water, and a heating-steam flow path which supplies heated steam from the third condenser to the reheating room partitioned by the first partition and the second partition. | 12-30-2010 |
| 20110274562 | HOSE PUMP - The invention relates to a hose pump for delivering fluids, comprising a housing ( | 11-10-2011 |
| 20110286864 | MULTIPLE INLET VACUUM PUMPS - First and second pump stages provide a flow-path from an inlet to the outlet ( | 11-24-2011 |
| 20120014816 | COMPRESSOR - A compression device includes a plurality of compressors in a shell. Each compressor includes a rolling piston that rotates within a cylinder to compress refrigerant. At least one valve allows refrigerant to be simultaneously or successively compressed by the compressors. A first pipe transfers refrigerant into one of the compressors, and a second pipe transfers refrigerant compressed in one of the compressors to another one of the compressors when the refrigerant is successively compressed by the compression mechanisms. The first and second pipes are coupled to the cylinder of one of the compressors. | 01-19-2012 |
| 20120100015 | MULTI-STAGE COMPRESSOR - Provided is a multi-stage compressor which includes: a first-stage compressing unit which includes a first compressing element with an impeller and a second compressing element with an impeller, the first and second compressing elements being connected to each other; and a rear-stage compressing unit which includes at least one rear compressing element with an impeller, wherein the rear-stage compressing unit receives a fluid compressed and output from the first-stage compressing unit. | 04-26-2012 |
| 20120171056 | MOTORCOMPRESSOR UNIT WITH VARIABLE AERODYNAMIC PROFILE - This motorcompressor unit comprises at least one motor driving the rotation of a rotor and at least one compression stage comprising a set of bladed impellers mounted on a driven shaft the rotation of which is driven by the rotor, the assembly consisting of the motor and the or each compressor being mounted in a common casing that is gastight with respect to the gas handled by the compressor unit. | 07-05-2012 |
| 20130028757 | VACUUM PUMPING SYSTEM - The present invention relates to a vacuum pumping system ( | 01-31-2013 |
| 20140017099 | TURBOCHARGER SYSTEM WITH REDUCED THRUST LOAD - An exemplary compressor is provided. The compressor includes a plurality of blades, a hub defining a front surface and a back surface, and a first flow restriction structure provided at the back surface of the hub. The plurality of blades are arranged in a predefined manner on the front surface for receiving input air flow at a first pressure and compressing the input air flow to provide an output air flow at a second pressure higher than the first pressure. The first flow restriction member is configured for preventing at least a portion of the output air flow at the second pressure from entering into the back surface of the hub to reduce an air pressure at the back surface of the hub. | 01-16-2014 |
| 20140044570 | SYSTEM AND METHOD FOR A PUMP WITH ONBOARD ELECTRONICS - Embodiments of the present invention provide pumps with features to reduce form factor and increase reliability and serviceability. Additionally, embodiments of the present invention provide features for gentle fluid handling characteristics. Embodiments of the present invention can include a pump having onboard electronics and features to prevent heat from the onboard electronics from degrading process fluid or otherwise negatively impacting pump performance. Embodiments may also include features for reducing the likelihood that fluid will enter an electronics housing. | 02-13-2014 |
| 20140050597 | Pump Unit for a High-Pressure Pump - A pump unit includes a pump housing having a low-pressure inlet and a high-pressure outlet. A working medium is fed via the low-pressure inlet to a working chamber formed in the pump housing. The working medium is discharged from the working chamber via the high-pressure outlet. The pump unit also includes a pump piston channel formed in the pump housing and having a longitudinal axis. The pump unit has a first pump piston arranged movably along the longitudinal axis in the pump piston channel and coupled hydraulically to the working chamber. The pump unit also has a second pump piston arranged movably along the longitudinal axis in the pump piston channel and coupled hydraulically via a compensation volume to the first pump piston, wherein the compensation volume is coupled hydraulically to a compensation unit configured to adapt the compensation volume based on a pressure in the working chamber. | 02-20-2014 |
| 20140205472 | DUAL PUMP/DUAL BYPASS FUEL PUMPING SYSTEM - An example dual pump/dual bypass fuel pumping assembly may include a dual bypass valve including a first inlet port, a second inlet port, and a movable spool arranged to modulate fuel flow from the first inlet port to a first bypass port and a first discharge port and arranged to modulate fuel flow from the second inlet port to a second bypass port and a second discharge port based on a position of the movable spool; a first pump arranged to supply fuel to the first inlet port; a second pump arranged to supply fuel to the second inlet port; a supply header arranged to supply fuel to the first pump and the second pump; a bypass header fluidically coupled to the first bypass port, the second bypass port, and the supply header; and/or a discharge header fluidically coupled to the first discharge port and the second discharge port. | 07-24-2014 |
| 20140241909 | System Including High-Side and Low-Side Compressors - A system may be operable to circulate a working fluid between first and second heat exchangers. The system may include a suction line, a low-side compressor, a high-side compressor and a discharge line. The low-side and high-side compressors may both be in fluid communication with the suction and discharge lines. | 08-28-2014 |
| 20140294615 | Actuating Device For An Adjustable Convertible Top System Of A Motor Vehicle - An actuating device for an adjustable convertible top system of a motor vehicle includes at least two hydraulic drive cylinders. A first drive cylinder transmits an adjustment movement to a first gearing arrangement, and a second drive cylinder transmits the adjustment movement to a second gearing arrangement. The first drive cylinder and the second drive cylinder are connected hydraulically in series, such that an annular volume of the first drive cylinder is in fluid communication with a circular volume of the second drive cylinder via a connecting line. There is a difference between an annular area of the first drive cylinder forming the annular volume and a circular area of the second drive cylinder forming the circular volume. Intermediate gears having a different geometry and/or kinematics compensate for a speed difference between the two drive cylinders resulting from the difference. | 10-02-2014 |
| 20150078927 | Multi-Stage Pump Having Reverse Bypass Circuit - A multi-stage pump includes a pump head having at least two compression stages disposed in series With espect to the direction of flow of fluid through the pump, and a reverse fluid bypass circuit including a fluid passageway through which fluid flowing between upstream and downstream ones of the compression stages can he circulated back upstream of the upstream compression stage. The reverse fluid bypass circuit may restrict or stop the flow of fluid through the fluid passageway as long as the pressure differential across the fluid passage is below a. predetermined value. To this end, the reverse fluid bypass circuit may be configured to restrict the flow of fluid while the fluid is in its transitional or molecular flow regime, and allow the flow of fluid while the fluid is in its viscous flow regime. | 03-19-2015 |
| 20150104335 | INTERNAL-DRIVEN COMPRESSOR HAVING A POWERED COMPRESSOR ROTOR - The internal-driven compressor having a powered compressor rotor. The internal-driven compressor includes a compressor housing including a suction port and a discharge port, an internal driver including a rotor and a stator, the rotor and the stator located within the compressor housing, the stator located radially inward of the rotor, and a powered compressor rotor including an annular body extending about a center axis, wherein the rotor is fixed to the powered compressor rotor and configured to rotate the powered compressor rotor about the center axis in response to a force imparted by the stator. | 04-16-2015 |
| 20150118075 | COMPRESSOR THRUST BEARING SURGE PROTECTION - The present invention provides a method and apparatus of inhibiting a thrust bearing capacity of a compression system from being exceeded during a surge event in which a thrust bearing is biased with a biasing force to increase the thrust bearing overload margin between the capacity of thrust bearing to absorb axial forces and the greatest force produced during the surge event. This biasing force can be produced by appropriately sizing the high pressure seal on the side of the impeller opposite to the inlet of a compressor of the compression system so that the back disk force produced in the high pressure region of the high pressure seal and the low pressure region located inwardly of the high pressure region creates the desired bias force value and direction. | 04-30-2015 |
| 20150132155 | PUMP DEVICE WITH A VACUUM PUMP AND A LUBRICATION PUMP - A pump device having a drive shaft which has a drive section that can be coupled with a drive system. The pump device includes a vacuum pump that can be driven by the drive shaft. The vacuum pump includes a rotor and at least one blade that can be moved in radial direction in the rotor and that divides pressure chambers. The pump device also includes a lubrication pump that can be driven by the drive shaft. The vacuum pump is arranged between the drive section and the lubrication pump. A locking device is provided between the rotor and the lubrication pump in which, when activated, the at least one blade remains in a radially internal position when the rotor is rotating. | 05-14-2015 |
| 20150308456 | ELECTRIC MOTOR-DRIVEN COMPRESSOR HAVING BI-DIRECTIONAL LIQUID COOLANT PASSAGE - An electric motor-driven compressor includes a motor having a rotor and a stator in a motor housing, a low-pressure compressor mounted to one end of the motor housing, and a high-pressure compressor mounted to the other end of the motor housing, the compressors forming a two-stage compressor. The motor housing defines a convoluted liquid coolant passage having a plurality of axially spaced-apart, convoluted passageways arranged for serial flow of liquid coolant from the passage inlet, then through each of the convoluted passageways one after another, and finally out from the outlet. The coolant passage further defines at least a first bypass passage that intersects with the convoluted passageways and extends in a non-convoluted fashion so as to interconnect the convoluted passageways and provide an alternative flow path for the coolant. | 10-29-2015 |
