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Pumps October categorized by USPTO classification 10/12Below are recently published patent applications awaiting approval from the USPTO. Recent week's RSS XML file available below.
Listing for abstract view: USPTO application #, Title, Abstract excerpt,Patent Agent. Listing format for list view: USPTO National Class full category number, title of the patent application. 10/25/2012 > 17 patent applications in 14 patent subcategories.
20120269651 - Compressed air energy storage system utilizing two-phase flow to facilitate heat exchange: A compressed-air energy storage system according to embodiments of the present invention comprises a reversible mechanism to compress and expand air, one or more compressed air storage tanks, a control system, one or more heat exchangers, and, in certain embodiments of the invention, a motor-generator. The reversible air compressor-expander uses... Agent: Lightsail Energy Inc.
20120269652 - Control method of fan rotation speed: A control method of a fan rotation speed, which controls the operation of a fan set including fans connected in series, is disclosed. The control method includes the steps of acquiring a control factor; judging whether the control factor is less than a first threshold value; executing a first control... Agent:
20120269653 - Dual power input fluid pump: A fluid pumping system for a vehicle having an internal combustion engine includes a housing, an electric motor, a controller to control the speed of the electric motor, a planetary gearset including a first member adapted to be driven by the internal combustion engine, a second member driven by the... Agent:
20120269655 - Compact peristaltic medical pump: A compact medical pump includes a linear peristaltic pumping mechanism driven by a motor located within a periphery of a belt of the pumping mechanism. The motor drives a gear set that drives a driving pulley which engages the belt having the rollers. A battery for the pump is positioned... Agent: Tyco Healthcare Group Lp
20120269654 - Optimization of dead space in pistonless compressors: A method for operating a pistonless compressor, which serves the purpose of compressing a gaseous medium, in particular a cryogenic medium and in the cylinder of which a liquid column is moved up and down, is described.... Agent:
20120269656 - Opposing swash plate piston pump/motor: A first swash plate (30) and a second swash plate (40) are disposed on either side of a cylinder block (4), and a plurality of cylinders (6) are disposed in the cylinder block (4). A first piston (8) and a second piston (9) are inserted opposite to each other in... Agent: Kayaba Industry Co., Ltd.
20120269657 - Wind machine pumping system for accumulating and pumping underground water from below the water table: A water pumping system having a wind machine driving an air compressor. The tower extends underground into the water saturated ground below the water table. The base of the tower has a water accumulator chamber with a one-way inlet valve such that water can pass into the water chamber. An... Agent:
20120269658 - Diaphragm pump with high suction capacity: A hydraulically-controlled diaphragm pump having a pump head in which a first deformable diaphragm defines a pump chamber, a pump body that co-operates with the first diaphragm to define a hydraulic working chamber, and a piston mounted to move back and forth in the pump body so as to form... Agent: Milton Roy Europe
20120269659 - Turbocharger: The invention relates to an exhaust-gas turbocharger (1) having a turbine (2), and having a compressor (3) which has a compressor housing (10), said compressor housing (10) being fastened to a bearing housing (4) and having a compressor spiral (13) and a bearing-housing-side diffuser wall (14), wherein the compressor housing... Agent: Borgwarner Inc.
20120269660 - Electric motor and electric submersible pump: In accordance with one aspect of the present invention, an electric motor is provided that includes a housing, a stator, and a rotor, wherein the stator and the rotor are disposed within the housing. The housing, the stator, and the rotor define an internal volume within the housing, said internal... Agent: General Electric Company
20120269661 - Mounting arrangement of the suspension springs in a refrigeration compressor: The suspension spring mounting arrangement is applied to a refrigeration compressor comprising a shell (1) and a block (3) forming, with the stator (4) of an electric motor, a stationary assembly (2) mounted inside the shell (1) by means of an assembly of helical springs (10), each spring presenting a... Agent: Whirlpool S.a.
20120269662 - Mounting arrangement for an eccentric shaft in a refrigeration compressor: The compressor of the invention includes a block (B) defining a shaft hub having a first and a second end portion and housing an eccentric shaft having a median portion radially journalled in the shaft hub, and a free end portion carrying the rotor of an electric motor. The first... Agent: Whirlpool S.a.
20120269663 - Battery-powered fans: A battery pack can be mounted to and removed from at least one of a fan main body and a support device at least when the fan main body is supported on an installation surface via the support device.... Agent: Makita Corporation
20120269664 - Motor-pump unit: A motor-pump unit, for providing pressure for a brake actuating device having a pneumatic brake booster including a pump and an electric motor driving the pump, the pump being a dual diaphragm pump having two opposed working diaphragms, each of which is clamped between a pump casing and a working... Agent: Continental Teves Ag & Co. Ohg
20120269665 - Blower fan: A motor arranged to rotate an impeller includes a rotor magnet fixed to a shaft, and a stator arranged opposite to the rotor magnet. The motor is arranged on an axially lower side of an impeller cup. The stator is fixed to an inner circumferential surface of a stator support... Agent: Nidec Corporation
20120269667 - Hermetic compressor: A hermetic compressor (100) includes a closed casing (2), a compression mechanism (4), a motor (6), a discharge pipe (8), a first balance weight (18), a swirl flow generating portion (21), and a second balance weight (19). The motor (6) has a stator (14) and a rotor (15). A communication... Agent: Panasonic Corporation
20120269666 - Motor and fan using the same: Disclosed herein are a motor and a fan using the same. The motor includes a chassis having a fillister, a stator assembly disposed at a central area of the chassis, a circuit element disposed in the fillister, a first resin material, and a second resin material. The first resin material... Agent: Delta Electronics, Inc.10/18/2012 > 10 patent applications in 8 patent subcategories.
20120263604 - Hydraulic pump control apparatus and method of construction machine: Disclosed are a hydraulic pump control apparatus and a hydraulic pump control method of a construction machine. The hydraulic pump control apparatus includes a pump control unit for controlling a discharge pressure of a hydraulic pump driven by an engine. The pump control unit includes: a pressure setting value calculating... Agent: Doosan Infracore Co., Ltd.
20120263605 - Compression method and air separation: A compression method, a multistage compression system and an air separation method and plant in which a gas is compressed in a series of compression stages to produce a compressed gas and each of the compression stages incorporate a variable speed compressor. In such compression method and system, the compressed... Agent:
20120263606 - Electrical submersible pump with reciprocating linear motor: A reciprocating pump, actuated by an expandable material, can be used to pump well fluids from a wellbore toward the surface of the earth. The expandable material can include piezoelectric, electrostriction, magnetostrictive, or piezomagnetic material. By using the expandable material, the pump can be sufficiently small to fit in various... Agent: Saudi Arabian Oil Company
20120263607 - Air jet for removing polluting oil: The present invention relates to an air jet for removing pollutant oil, and more particularly to an air jet capable of removing oil deposited on a small mud flat, sand or sedimentary soil in a coastal or inland area by injecting compressed air to float the oil on the water... Agent:
20120263608 - Pump casing and related apparatus and methods: A pump casing has a metallic band that defines a sidewall of the pump casing and having at least one tab projecting from a surface thereof or at least one opening. The pump casing also has first and second plates disposed opposite one another, with the metallic band being disposed... Agent: Thermo Neslab Inc.
20120263609 - Compressor including motor cooling: A compressor may include a shell, a compression mechanism supported within the shell, a drive shaft engaged with the compression mechanism and a motor. The drive shaft may define first and second passages extending axially within the drive shaft and a third passage extending radially through an outer circumferential surface... Agent:
20120263612 - Axial gap motor and pump device: Disclosed are a single rotor-type axial gap motor with low magnetic loss and high output, and a pump device using the axial gap motor. A first contact surface (231) is provided on the lateral surface in one circumferential direction of a yoke strip (23), and a second contact surface (232)... Agent: Fujitsu General Limited
20120263610 - Electric submersible pump (esp) thrust module with enhanced lubrication and temperature dissipation: A thrust module and a seal module for use in an electric submersible pump assembly is provided. The thrust module provides increased lubrication and heat dissipation while increasing sealing redundancies within the module. The thrust module includes a thrust bearing that absorbs thrust from the primary pump. A circulation pump... Agent: Baker Hughes Incorporated
20120263611 - Handheld blowing device and method of therefor: A handheld blowing device has a pair of side body members. The pair of side body members forms an interior section when connected together. One end of the pair of side body members is closed and a second end of the pair of side body members form a tapered open... Agent:
20120263613 - Piston pump for a hydraulic vehicle braking system: A piston pump as a return pump of a slip-controlled, hydraulic vehicle braking system is disclosed. There is a mushroom-shaped shut-off body as a spring-loaded outlet valve, the shaft thereof extending through a center hole of a tubular damper piston. The shut-off body is movable transversely to the opening and... Agent: Robert Bosch Gmbh10/11/2012 > 15 patent applications in 11 patent subcategories.
20120257987 - Cover structure for cryopump, cryopump, start-up method of cryopump, and storage method of cryopump: A storage method of a cryopump is provided, the storage method including: closing, with a pump cover, a pump inlet in the cryopump for receiving gases to be pumped by the cryopump; and reducing a pressure in the cryopump through a fluid channel for communicating an interior of the cryopump... Agent: Sumitomo Heavy Industries, Ltd.
20120257986 - Rotary cam actuated linear peristaltic pump: A rotary cam actuated linear peristaltic pump includes a plurality of cams which actuate a plurality of pistons. The cams apply a force to the piston by way of a lifter for providing mechanical advantage so that a smaller motor may be used to rotate the cam. Each piston of... Agent:
20120257985 - Torque transmitting rings for sleeves in electrical submersible pumps: An electrical submersible pump assembly has a motor module coupled to a centrifugal pump module by a seal section module. A shaft assembly extends through each of the modules for causing the motor module to rotate the pump module. At least one of the modules has a sleeve extending around... Agent: Baker Hughes Incorporated
20120257988 - Apparatus for mixing and pumping manure slurries: An apparatus for mixing and pumping manure slurry from a manure pit comprises a pump unit having first and second mixing rotors and a pumping rotor. In operation, the first mixing rotor draws solids downwardly towards the pump unit while the second mixing rotor redirect a portion of the solids... Agent:
20120257990 - Control of subsea compressors: System for control of a subsea located compressor fluidly connected to receive an inlet flow of gas through an inlet line, said flow may include liquid in an amount that may vary. The control system comprises a sensor means for measuring and determining the liquid droplet size distribution and liquid... Agent:
20120257989 - Method and system of submersible pump and motor performance testing: Submersible pump and motor performance testing. At least some of the illustrative embodiments are methods including: coupling a torque meter between an electric motor and a pump; and submersing the torque meter, electric motor, and pump in water. During periods of time when the torque meter, electric motor and pump... Agent: Gicon Pump & Equipment, Ltd.
20120257991 - Pressure exchanger: A pressure exchanger for transferring pressure from a high pressure fluid to a low pressure fluid, including a housing and a rotor arranged for rotation within the housing, the rotor having at least one passage extending generally axially through the rotor, the passage having a first opening at one end... Agent: Ghd Pty Ltd
20120257992 - Air compressor: An air compressor is provided. The air compressor includes a compression mechanism including a cylinder to generate compressed air, a motor provided to drive the compression mechanism, an inverter board including an inverter to control a rotation of the motor, two elongated tanks provided to store the compressed air generated... Agent: Max Co., Ltd.
20120257993 - Sealed compressor: A sealed compressor according to the present invention comprises an electric element; a compression element; a sealed container; and a suction pipe. The compression element includes a compression chamber, a piston provided inside of the compression chamber, and a suction muffler communicating with the inside of the sealed container and... Agent: Panasonic Corporation
20120257994 - Power generating apparatus of renewable energy type and method for installing hydraulic pump: It is intended to provide a power generating apparatus of renewable energy type which can transmit large torque and has a low-cost and readily processable structure of fixing a hydraulic pump to the main shaft and a method of mounting the hydraulic pump. A plurality of key slots 25 are... Agent: Mitsubishi Heavy Industries, Ltd.
20120257995 - Submersible pump and motor rotation indication circuit: It is appreciated that there may be ways to sense, transmit, store, or measure the direction of rotation of a pump or motor other than in the embodiments described above, however this patent application is not limited to the embodiments above but cover and include the spirit and intent of... Agent:
20120257996 - Vehicle a/c compressor assembly: A vehicle a/c compressor assembly for a hybrid or electric vehicle includes an electric motor housing, an AC electric motor in the electric motor housing, a compressor housing and a compressor in the compressor housing. The AC electric motor is drivingly coupled to the compressor exterior to the motor housing... Agent:
20120257997 - Air compressor: An air compressor includes a compressor body, an electric motor, and a gear mechanism that transmits power of the electric motor to the compressor body to prevent intrusion of dust into a casing of the electric motor for improving reliability. In the example in which a gear casing, a load... Agent: Hitachi Industrial Equipment Systems Co., Ltd.
20120257998 - Runner with integral impellor pump: In aspects, the present disclosure provides an apparatus for handling axial thrust in rotating equipment. The apparatus may include a thrust bearing and a runner having a contact surface engaging the thrust bearing. The runner may include passages extending between the contact surface and an opposing surface of the runner.... Agent: Baker Hughes Incorporated
20120257999 - Fan assembly and fan device thereof: A fan assembly and its fan device are disclosed herein. The fan device includes a housing, a fan body disposed in the housing, a connector electrically connected with the fan body, and a fixing cover detachably assembled to the housing. The fixing cover includes a connecting structure fitting a type... Agent: Delta Electronics, Inc.10/04/2012 > 36 patent applications in 26 patent subcategories.
20120251332 - Power control apparatus and power control method of construction machine: The present disclosure provides a power control apparatus of a construction machine, including: an engine connected to a hydraulic pump to drive the hydraulic pump; and a controller for calculating an engine load ratio defined as a ratio of a load torque of the engine for an engine maximum torque... Agent: Doosan Infracore Co., Ltd.
20120251333 - Autonomous sump pump system: An autonomous sump (ASP) system is designed to remove water from a sump using a source of power other than commercial electrical power or battery power. The ASP system can be a stand-alone unit or, alternatively, can be used along with a preexisting sump pump system. In some embodiments, the... Agent:
20120251334 - Ceiling fan controller using a dip switch to set rotation speed thereof: A ceiling fan controller using a DIP switch to set a rotation speed comprises a rectifying filter circuit, a CPU, a motor driving module, a voltage lowering circuit, an automatic balancing circuit, and a sensing circuit for a DC non carbon brush motor. A DIP switch electrically connects to the... Agent: Chao-chin Yao
20120251335 - Pump controller with multiphase measurement: Methods and apparatus for measuring phase flow rate of the components of a multiphase fluid in a conduit. A pumping system pumps out a multiphase fluid from a wellbore. At least one processor, which may also control the pump, is used to determine the total liquid flow rate over time.... Agent:
20120251336 - Vacuum enhancing system or non-evaporable getter: Vacuum enhancing system or non-evaporable getter of the type used en solar-receptor vacuum tubes which comprises a series of non-evaporable getter material pads the geometry of which is that of a prism with rounded corners and said pads are drilled through the centre thereof and linked by means of a... Agent: Abengoa Solar New Technologies, S.a.
20120251339 - Method and apparatus for oscillating a foil in a fluid: The present invention relates to a method and apparatus for oscillating a foil in a fluid. The method according to the invention comprises the steps of —generating an oscillating heave motion of the foil in the fluid, the oscillation cycle of the heave motion consisting of two strokes of the... Agent:
20120251340 - Method for improving sensorless flow rate estimation accuracy of pump driven with frequency converter: An exemplary method for determining a flow rate of a pump, includes measuring and storing the flow rate (QMean) when the pump is in operation, storing rotational speed (nMean) and torque (TMean) of the pump during measurement of the flow rate (QMean), determining torque (TManufacturer) corresponding to the measured flow... Agent: Abb Oy
20120251337 - Sliding valve downhole pump: Downhole pumps for producing hydrocarbons and/or other fluids from a well bore include a barrel having a plunger or plunger valve disposed therein and a stationary valve engaged with the barrel. The valve(s) include(s) an outer housing and an inner piston movable within the outer housing. Responsive to movement of... Agent:
20120251338 - Vibratory cavitation pump lishanski: A vibratory cavitation pump is provided that includes a working cylinder having an fluid inlet and a fluid outlet, a rod extending into the cylinder, a piston fixed to the rod, a plate fixed to the rod and spaced from the piston, an activator slidably mounted to the rod between... Agent:
20120251341 - Fuel pump module including a horizontal sender gauge: A fuel pump module includes a reservoir and a sender gauge. The reservoir is configured to contain fuel. A sender gauge includes a card mount and a resistance card. The card mount is fixed within the reservoir. The resistance card is fixed to the card mount and has a length... Agent: Denso International America, Inc.
20120251342 - Control system and method for pump output pressure control: A pump system includes pump having a control feature which, responsive to a supply of pressurized working fluid, reduces the pressure of the working fluid pressurized by the pump. The control feature is connected to the output of the pump by a regulating valve. The control feature receives pressurized working... Agent:
20120251343 - Control valve and variable capacity swash-plate type compressor provided with same: [Disclosure of the Invention] A control valve for opening and closing a fluid passage comprises a pressure sensitive unit provided with a bellows for receiving outside fluid pressure to expand and retract, a valve body for opening and closing a fluid passage in response to the expansion and retraction of... Agent: Sanden Corporation
20120251344 - Double-headed piston type swash plate compressor: A double-headed piston type swash plate compressor is provided with a front housing including a suction chamber, a rear housing, a cylinder block, a rotation shaft, and double-headed pistons. The cylinder block includes cylinder bores, a rotation shaft accommodation bore, a communication conduit that communicates the suction chamber with the... Agent: Kabushiki Kaisha Toyota Jidoshokki
20120251345 - Reciprocating-type compressor: The respective spaces for forming gas passages on the suction side 21, 31 formed on the front and rear side cylinder blocks 2, 3 are assembled together to configure a gas passage on the suction side 51, and the respective spaces for providing gas passages on the discharge side 22,... Agent:
20120251346 - Air compressor: An air compressor includes a motor, an air compression mechanism driven by the motor, a rotation shaft rotatable integrally with a rotor of the motor, a fan rotatable integrally with the rotation shaft, a plurality of air tanks for reserving compressed air generated by the air compression mechanism, and a... Agent: Hitachi Koki Co., Ltd.
20120251347 - Compressor with transmission: A compressor with a transmission includes a clutch that varies the rotational speed of an output shaft between two different speeds. The clutch includes a friction layer, which secures a ring roller by movement of the ring roller in a first direction (securing direction), a first control chamber, a first... Agent: Kabushiki Kaisha Toyota Jidoshokki
20120251348 - Motor-driven compressor: A motor-driven compressor that suppresses the transmission of vibration and noise to the exterior. The motor-driven compressor includes a housing and a compressor mechanism and motor mechanism, which are arranged in the housing. The compressor mechanism draws refrigerant into the housing, compresses the refrigerant, and discharges the refrigerant from the... Agent: Kabushiki Kaisha Toyota Jidoshokki
20120251349 - Sea wave power converter: A primary piston that is connected to a secondary piston that is part of a compressor, primary and secondary piston are connected by a connecting rod, the primary piston is driven by the pressure and vacuum produced by a pressure chamber that is driven by the variation of the sea... Agent:
20120251350 - Motor-driven compressor: A motor-driven compressor comprises a mounting portion for mounting a housing including a fluid compression mechanism to an attachment section of a vehicle. The mounting portion includes a tubular body, a damping member provided integrally with the tubular body and formed from a resin, a fixing member provided integrally with... Agent: Kabushiki Kaisha Toyota Jidoshokki
20120251351 - Gas compressor assembly: A gas compressor assembly for compressing a gas includes a rotor having a rotational axis, a motor section and a compressor section arranged along the rotational axis of the rotor. The gas is supplied via an inlet. A first motor passageway directs the gas from the inlet to the motor... Agent:
20120251352 - Turbocharger assembly: According to an aspect of the present invention, there is provided a turbocharger assembly, comprising: a turbocharger; one or more actuators for controlling a flow of fluid in, around, or associated with the operation of the turbocharger; control electronics for use in controlling actuation of the one or more actuators;... Agent:
20120251354 - Electric oil pump: An electric oil pump including an electric motor, a first pump element that is driven to suck and discharge oil by output torque of the electric motor, a second pump element that is driven to suck and discharge the oil by the output torque of the electric motor, and a... Agent: Hitachi Automotive Systems Ltd.
20120251353 - Lateral thruster for a vessel: A lateral thruster for a vessel with a housing (1), at least one electric motor (2, 2′) fitted in the housing (1) and at least one transverse propeller (13) acting transversely with respect to a longitudinal axis (3) of the vessel (5) is additionally provided with at least one longitudinal... Agent: Marinno -- Maritime Innovations Gmbh & Co. Kg
20120251355 - Motor-driven compressor: A motor-driven compressor has a housing and a partition. A compressing portion and an electric motor as the drive source of the compressing portion are accommodated in a first area. A drive circuit for the motor is arranged in a second area so as to have dissipation of the drive... Agent: Kabushiki Kaisha Toyota Jidoshokki
20120251356 - Motor-driven compressor: A motor-driven compressor that prevents electric leakage from a drive circuit while suppressing the generation of noise. The motor-driven compressor includes a compressor mechanism that compresses a refrigerant, a motor mechanism that actuates the compressor mechanism, a drive circuit that drives the motor mechanism. The drive circuit is connected to... Agent: Kabushiki Kaisha Toyota Jidoshokki
20120251357 - Motor-driven compressor: A motor-driven compressor to be mounted to an attachment section of a vehicle includes a fluid compression unit, an electric drive unit for the compression unit and a case. The case has a main body formed from a resin and covering at least the compression unit, and a mounting portion... Agent: Kabushiki Kaisha Toyota Jidoshokki
20120251358 - Motor-driven compressor: A motor-driven compressor that suppresses the transmission of vibration and noise to the exterior, while obtaining heating performance that is sufficient for use in a heat pump. The motor-driven compressor includes a compressor mechanism, which compresses a refrigerant, and a motor mechanism, which actuates the compressor mechanism. The motor-driven compressor... Agent: Kabushiki Kaisha Toyota Jidoshokki
20120251359 - Low noise high efficiency solenoid pump: A low noise, high efficiency solenoid pump includes a housing containing a hollow electromagnetic coil. Within the coil resides a pump assembly defining a tubular body having a pair of opposed ends which respectively include an inlet or suction port and an outlet or pressure port and within which a... Agent: Gm Global Technology Operations LLC
20120251360 - Bracketless magnetic pump: A fluid pump kit is provided. The kit includes a magnetic driven member for coupling with and rotating a propeller, and a magnetic driver for magnetically coupling to and driving the magnetic driven member by a magnetic attraction force establishable between the magnetic driver and the magnetic driven member. A... Agent:
20120251362 - Esp with offset laterally loaded bearings: A submersible pumping system for use downhole, wherein the system includes a pump, a pump motor, a seal section, a shaft coupling the pump motor to the pump, and bearing assemblies for radially retaining the shaft in place that are offset with respect to an axis of the shaft. The... Agent: Baker Hughes Incorporated
20120251361 - Motor-driven compressor: A motor-driven compressor includes an electric motor, a compression mechanism, which compresses gas by being driven by the electric motor, and a body accommodating the electric motor and the compression mechanism. The motor-driven compressor includes a motor control section, which drives the electric motor by controlling power supply to the... Agent: Kabushiki Kaisha Toyota Jidoshokki
20120251363 - High-pressure pump: During a pressurization stroke of a high-pressure pump, a cylinder inner wall and a plunger receive a fuel pressure from the pressurization chamber. Meanwhile, an upper housing does not receive the fuel pressure from the pressurization chamber, so that its thickness can be made thin. A cylinder is comprised of... Agent: Denso Corporation
20120251364 - Piston compressor: A piston compressor includes at least one piston which is coupled in movement to a crankshaft, the crankshaft being designed in an at least two-part manner. The at least two parts of the crankshaft are connected to one another by way of a cone connection.... Agent:
20120251365 - High pressure fuel pump: A discharge valve body and a relief valve body are coaxially arranged in-series in a discharge-relief valve unit, which is accommodated in a fuel discharge passage. When a first forward force acting on the discharge valve body in its valve opening direction becomes larger than a second rearward force acting... Agent: Denso Corporation
20120251366 - High-pressure pump: A valve body is provided with a discharge relief portion. A relief valve outlet is formed in an end face thereof on a central axis of the valve body. Discharge valve inlets are point-symmetrically formed with respect to the central axis. A discharge valve outlet is formed in another end... Agent: Denso Corporation
20120251367 - Pump pressure control valve with shock reduction features: A pump includes a pump casing defining a first chamber and a second chamber, and fluid moves from the first chamber to the second chamber during a stroke. The pump also includes a needle that is movably disposed in the first chamber and a valve carriage that is movably disposed... Agent: Denso International America, Inc.Previous industry: Fluid reaction surfaces (i.e., impellers)
Next industry: Rotary expansible chamber devices
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