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Pumps June invention type 06/10

Below 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.
06/24/2010 > patent applications in patent subcategories.

- Air compressor system: In one aspect of the present invention, a compressor system includes a compressor shaft for generating compressed air, a clutch that, when engaged, transfers power from a vehicle engine to drive the compressor shaft and that, when disengaged, does not transfers power from the vehicle engine to drive the compressor... Agent: Calfee Halter & Griswold, LLP

- Electric fluid pump and mold for insert-molding casing of electric fluid pump: An electric fluid pump includes a casing, a rotor arranged in the casing, and a shaft member supported by the casing and including a shaft portion extending in the casing in a direction of an axis of the shaft member, having a first end portion arranged at one axial end... Agent: Buchanan, Ingersoll & Rooney PC

- Compliant-seal check valve: A check valve includes a valve seat and a compliant member that moves to seal the check valve by contacting the valve seat. A method for priming a chromatography solvent pump includes providing the check valve in fluid communication with an outlet of the pump, drawing fluid into the pump... Agent: Waters Technologies Corporation

- Device and method for collecting the kinetic energy of a naturally moving fluid: The invention relates to a device (100, 200) for collecting the kinetic energy of a naturally moving fluid, that comprises: a first conversion means (112, 212) capable of converting the fluid movement into a driving movement for driving a pumping or compression means (116, 216); a pumping or compression means... Agent: Blakely Sokoloff Taylor & Zafman LLP

- Fuel system: A fuel system is described that comprises a pressure raising and shut-off valve (PRSOV), and a control valve arrangement operable to control a fuel pressure applied to a part of the PRSOV urging the PRSOV towards a closed position, wherein the control valve arrangement is supplied with fuel at a... Agent: Andrus, Sceales, Starke & Sawall, LLP

- Pressure change compensation arrangement for pump actuator: An arrangement for controlling a swash plate of a pump includes an actuator having a piston adapted to be coupled to the swash plate wherein the separates an actuator internal chamber into first and second subchambers to which first and second valve assemblies are fluidly coupled, respectively. Each valve assembly... Agent: Leydig, Voit & Mayer, Ltd

- Two-stage membrane pump with economical inlet port design: A two-stage membrane pump having a first pump head and a second pump head is provided. The pump heads are typically crank operated with a camshaft set up such that one pump head is in exhaust mode and the other in inlet mode, and vice-versa, during operation. The membrane and... Agent: Husch Blackwell Sanders, LLP Husch Blackwell Sanders LLP Welsh & Katz

- Plug unloader using low force actuator for reciprocating compressors: The advantages of plug type unloaders are well know and accepted by authorities such as American Petroleum Association as well as compressor and component manufacturers as well as users. There are further benefits to this device such as eliminating plug to valve misalignment and is lighter than other type unloaders.... Agent: System Dynamics

- Scroll compressor: A compressor includes a housing, a fixed scroll, a movable scroll and a control valve. The housing has a suction chamber, a discharge chamber and a backpressure chamber formed therein. The scrolls are pressed against each other by backpressure in the backpressure chamber. The control valve for controlling the backpressure... Agent: Sughrue Mion, PLLC

- Compressor: Oil sucked by an oil pump and supplied to an opening at an eccentric shaft flows on the top end face of the eccentric shaft to the outer periphery thereof, and splashes from an edge in substantially a radial direction onto the sliding portions of a cylinder and a piston.... Agent: Pearne & Gordon LLP

- Compressor with dual outboard support bearings: A compressor includes a motor having a rotor mounted to a free end of a crank shaft and a stator in a motor housing, and a bearing assembly supporting the crank shaft on the crank shaft housing adjacent the motor housing. The bearing assembly includes a bearing housing mounted to... Agent: Barnes & Thornburg LLP

- Fan motor: The present invention provides a fan motor capable of achieving both an improvement in a self cooling function of the fan motor and a reduction in fan noise, and of preventing the occurrence of heat damage, problems, and the like caused by external radiation heat and by self-heating, fan noise,... Agent: Westerman, Hattori, Daniels & Adrian, LLP

- Rotary pump with a fixed shaft: A rotary pump (1), which can be operated by an electronically commutated DC motor (56) with an axial gap, with a dry space (54), in which a wound stator (55) is accommodated, and a fluid-fillable pump space (13), in which a permanent magnetic pump impeller (5) is accommodated to rotate,... Agent: Jacobson Holman PLLC

- Mute compressor: A mute compressor includes a driving motor, a positioning base fixed at one side of the driving motor, a driven mechanism and a cylinder fixed above the positioning base. The driving motor has a driving gear and a cooling fan respectively fixed at its two sides. The positioning base is... Agent: Min-hsieng Wang

- Precision pump with multiple heads: A pump for one or more different process fluids is provided including a pumping chamber having a process fluid inlet and outlet coupled to a process fluid valve on each pumping chamber for selectively preventing and allowing flow of process fluid through the pumping chamber. An actuation mechanism for pumping... Agent: Caesar, Rivise, Bernstein, Cohen & Pokotilow, Ltd.

- Vapor recovery gas pressure boosters and methods and systems for using same: In one preferred embodiment, the gas pressure booster includes a drive cylinder and a boost cylinder interconnected by reciprocating drive and boost pistons. The drive piston supplies force powered by a first gas stream within the drive cylinder which exhausts to a second gas stream at a lower pressure. Fugitive... Agent: Michael P. Mazza, LLC

- Electric ventilator: An electric ventilator (1) comprises a frame (2), a pair of centrifugal fans (3) mounted on the frame (2), an electric motor (4) for driving the fans (3) and axially interposed between the fans (3), and a unit (5) for controlling the speed of the motor (4); the speed control... Agent: Shuttleworth & Ingersoll, P.L.C

- Oil-free centrifugal blade compressor and magnetic-gas bearing thereof: A magnetic-gas bearing disposed in a compressor is provided. The magnetic-gas bearing includes an axis, multiple magnetic elements, multiple magnetic coils and a static pressure gas restrictor. The magnetic elements encircle the axis, and each magnetic element has two ends wound around by the magnetic coils respectively, such that the... Agent: Morris Manning Martin LLP

- Valveless micropump: A valveless micropump for transforming a pressure variation of fluid in a volume variation chamber (8) into an oscillatory flow of fluid (10) by means of a piezoelectric element (7), making the fluid (10) to flow smoothly in channels (5, 6). A channel (2) is formed as an asymmetric diffuser-shaped... Agent: Browdy And Neimark, P.l.l.c. 624 Ninth Street, Nw

- Hermetic compressor and method of manufacturing the same: Provided is a hermetic compressor in which an electric element having a stator and rotor provided therein and a compression element driven by the electric element are housed and the compression element includes a shaft which has a main shaft portion and an eccentric shaft portion, a cylinder block, a... Agent: Pearne & Gordon LLP

- Air supplier, particularly for an air supply system for fuel cells: In an air supplier particularly for air supply systems for fuel cells including a compressor having a housing with a radial diffuser and including a rotor operated, by an electric motor, a diverting channel is connected to the radial diffuser providing a communication path guiding the air via an axial... Agent: Klaus J. Bach

- Rotary pump with a fixed shaft: A rotary pump (1) with a multipart pump housing (4), comprising a suction connector (6) and a pressure connector (7), a pump impeller (5) mounted on a fixed shaft (3), the pump rotor (5) being designed as a permanent magnetic rotor cooperating with an electromagnetic stator. The task of the... Agent: Jacobson Holman PLLC

- Electrically commutated dc motor for a liquid pump: An electrically commutated DC motor (1) for a liquid pump (2) with a pump housing (3) with a suction connector (4) and a pressure connector (5) for connection to a hydraulic circuit, an essentially disk-like pump rotor (6) mounted to rotate in the pump housing, consisting of an impeller (7)... Agent: Jacobson Holman PLLC

- Electrically commutated dc motor for a liquid pump: An electrically commutated DC motor (1) for a liquid pump (2) with a pump housing (3) with a suction connector (4) and a pressure connector (5) for connection to a hydraulic circuit, an essentially disk-like pump rotor (6) mounted to rotate in the pump housing, consisting of an impeller (7)... Agent: Jacobson Holman PLLC

- Plunger pump: A pump system according on one or more aspects of another embodiment of the present disclosure comprises a pair of plunger pumps disposed in a back-to-back assembly having a width that is less than about 102 inches, wherein each pump comprises a zero offset and at least a six inch... Agent: Winstead PC

- Suction port lock nut with stub buttress threads: A reciprocating pump assembly having a block body, a cylinder chamber in the block body, a plunger reciprocatingly disposed in the block body, an opening in the block body adjacent the cylinder chamber, and a cover plate in the opening. Threads on the outer periphery of the cover plate engage... Agent: Bracewell & Giuliani LLP

06/17/2010 > patent applications in patent subcategories.

- Fan system having improved availability and method for its operation: The present invention relates to a fan system and a method for its operation, including a control module (1) for controlling two circuit breakers, two circuit breakers (3, 4), two electric motors (5, 6) to which their operating voltage UB is supplied via the circuit breakers (3, 4), and at... Agent: Kenyon & Kenyon LLP

- Determination and control of wellbore fluid level, output flow, and desired pump operating speed, using a control system for a centrifugal pump disposed within the wellbore: A method and apparatus for determining a fluid level and/or output flow during operation of a centrifugal pump, are provided, which may be used for production of gas and/or oil from a well, and include a vector feedback model to derive values of torque and speed from signals indicative of... Agent: Reinhart Boerner Van Deuren S.c. Attn: Linda Kasulke, Docket Coordinator

- Electrohydrodynamic micropump and its use: An electrohydrodynamic micropump having at least one pumping passage for pumping a liquid, wherein there is at least one electrode device for generating an electrical alternating field and at least one device for producing a temperature gradient in the liquid to be pumped, which is arranged in and/or on the... Agent: Lerner Greenberg Stemer LLP

- Heat transfer through the electrical submersible pump: The motor of an electrical submersible pump generates a significant amount of heat that can be removed by transferring it to the well production fluid. The motor housing may have turbulators that increase the turbulence of the production fluid to increase the rate of heat transfer. The turbulators are designed... Agent: Bracewell & Giuliani LLP

- Hydraulic unit having orifice plate displacement control: A hydraulic unit is disclosed. The hydraulic unit may have a rotatable body at least partially defining a plurality of barrels, a plurality of plungers associated with the plurality of barrels, and a swashplate tiltable to vary a displacement of the plurality of plungers relative to the plurality of barrels.... Agent: Caterpillar/finnegan, Henderson, L.L.P.

- Sealing system device: The present invention relates to a dynamic sealing system device for a submerged pump comprising at least one feed line running in towards the dynamic sealing system, with a first valve device arranged in the feed line and a second valve device arranged such that in an open position it... Agent: Merchant & Gould PC

- Reconfigurable jet pump: The present invention provides reconfigurable jet pump that is also inexpensive to fabricate. In one preferred embodiment of the present invention, a jet pump is formed as a nozzle and a diffuser attached to a standard tube or pipe T-shape fitting. Suitable T-shape fittings may have one or more joints... Agent: Aqwest LLC.

- Single line venturi apparatus: An apparatus for providing vacuum to a material handling device. The apparatus of the present invention provides a housing having an aperture extending therethrough. The aperture has an inlet end for receiving a supply of pressurized air and an outlet end. A valve is slidably disposed within said aperture of... Agent: Young Basile

- Air conditioning compressor: A stroke-adjustable air conditioning compressor, in particular for motor vehicles, including a drive mechanism for pistons that move back and forth, the pistons being driven by an adjusting plate, such as a pivoting plate, pivoting ring or swash plate at an adjustable pivoting angle. The position of the pivoting angle... Agent: Davidson, Davidson & Kappel, LLC

- Yoke position sensor for a hydraulic device: An embodiments of the invention relates to a yoke position sensor system (7) for a hydraulic device (1), such as a pump or motor, provided with a moveable yoke (3) which is used for varying the displacement of the hydraulic device (1) and to a method for sensing the position... Agent: Alston & Bird LLP

- Compressor: The invention relates to a compressor (1) for gaseous and/or cryogenically liquefied media comprising a first compressor piston (6) and a second compressor piston (7), which are operatively connected to an eccentric shaft (2), wherein the second compressor piston (7) is arranged substantially opposite to the first compressor piston (6)... Agent: The Boc Group, Inc.

- Pump having pulsation-reducing engagement surface: A pump is disclosed. The pump may have a housing, and a body disposed within the housing and at least partially defining a plurality of barrels. The pump may also have a plurality of plungers associated with the plurality of barrels, and a plunger engagement surface. The plunger engagement surface... Agent: Caterpillar/finnegan, Henderson, L.L.P.

- Method of installing a permanent magnet motor in a cooling tower and a shroud used in connection therewith: A method comprises providing a motor with a stator comprising a plurality of laminations stacked side to side to form a contiguous stator core with each of the laminations having a plurality of radial fins projecting outward from a periphery of the lamination, and a rotor with permanent magnets spaced... Agent: Thompson Coburn LLP

- Centrifugal pump with offset volute: A pump includes: (a) an elongated pump housing having first and second ends; (b) a primary impeller mounted in the housing for rotation about an axis, the impeller comprising a plurality of vanes whose outer tips define an impeller plane; (c) an inlet disposed in fluid communication with the primary... Agent: Trego, Hines & Ladenheim, PLLC

- Electrical submersible pump system connection adapter: An electrical submersible pumping assembly having a seal section and a motor section, and seals that prevent leakage from the seal section and the motor section during assembly. The seals cooperate with a coupling assembly for coupling together shafts from both the seal section and motor section. The coupling assembly... Agent: Bracewell & Giuliani LLP

- Motor and compressor technology: An interior permanent magnet type brushless direct current (BLDC) motor includes a stator having a plurality of slots. The BLDC motor also includes a rotor positioned in the stator and that is rotatable with respect to the stator. The rotor has a rotor core, a plurality of permanent magnets inserted... Agent: Fish & Richardson P.C.

- Revolution type compressor: In a revolution type compressor using a balance weight for balancing a rotating mass, the effect of oil churn reduction is enhanced, and compressor input is reduced. A balance weight fixed to a drive shaft between a rotor of an electric motor 4 and a compression mechanism includes a weight... Agent: Antonelli, Terry, Stout & Kraus, LLP

- Oscillating diaphragm fan having coupled subunits and a housing having an oscillating diaphragm fan of this type: An oscillating diaphragm fan having a plurality of subunits which each have an oscillating diaphragm that is excited by a magnetic system in an actuator chamber, wherein the air pulsation generated by oscillating diaphragm is discharged outwardly, the actuator chambers of the subunits are connected via means for compensating pressure... Agent: Cohen, Pontani, Lieberman & Pavane LLP

- Piezoelectric pump: A pump body is provided including at least one inlet valve, at least one outlet valve, a substantially rigid top portion, a substantially rigid bottom portion, and collapsible side portions. The pump body also includes a base on or in the bottom portion and defining a rotational axis extending from... Agent: Darby & Darby P.C.

- Hermetic compressor: A hermetic compressor to conduct electricity to a stator coil without peeling off a coating formed on the coil while preventing the separation of the stator coil or lead wire from a compressible terminal. In the hermetic compressor including a hermetic container, a compression device to compress a refrigerant, a... Agent: Blank Rome LLP

- Nozzle device employing high frequency wave energy: A nozzle device comprising a nozzle chamber includes a fluid inlet located at a first side of the nozzle chamber which is operative to introduce fluid into the nozzle chamber in an injection direction and a fluid outlet at a second side of the nozzle chamber which is operative to... Agent: Ostrolenk Faber Gerb & Soffen

- Circuit board adapted to fan and fan structure: A plurality of openings through the heat-dissipative film, a protrusion of the circuit board, a cutout in the protrusion to expose the heat-generating component to airflow, etc., have been disclosed and claimed for enhancing the efficiency in heat dissipation. A heat sink may also be provided on a second surface... Agent: Pai Patent & Trademark Law Firm

- Air pump: An air pump comprises a cylinder, a piston, a piston rod, and four substantially rigid members. The piston is reciprocably movable within the cylinder and is secured to the piston rod. The first member is pivotably connected at its first end to the cylinder. The second member is pivotably connected... Agent: Klarquist Sparkman, LLP

- Pulsatile rotary ventricular pump: Furthermore, a roller pump having a roller pump conduit is provided. The roller pump conduit of the roller pump has a fill region and a delivery region, the fill region having a first taper, and the delivery region having a second and third taper, wherein the third taper has lesser... Agent: Schox PLC

06/10/2010 > patent applications in patent subcategories.

- Piston pump having a force sensor and a method for controlling said pump: The present invention relates to a piston pump for generating a delivery flow, which is substantially free of pulsation, in particular to a dual piston pump, and to a method for controlling such a piston pump delivering a pumped medium from a low-pressure area into a high-pressure area, wherein measuring... Agent: Thermo Finnigan LLC

- Fail-safe control method for oil pump control unit of hybrid vehicle: A fail-safe control method for an oil pump control unit of a hybrid vehicle directly connects an automatic transmission control unit and an oil pump control unit via a hard wire to control an oil pump driver in the event of a failure of the CAN communication line of the... Agent: Edwards Angell Palmer & Dodge LLP

- Method and system for detecting cavitation of pump and frequency converter: A method and a system are disclosed in accordance with a pump controlled with a frequency converter. An exemplary method includes controlling the pump with a frequency converter, the frequency converter feeding a motor connected to drive the pump, providing a torque estimate (Test) and/or a rotational speed estimate (nest)... Agent: Buchanan, Ingersoll & Rooney PC

- Variable speed air compressing system: A variable speed air compressing system includes a compressor, a motor configured to actuate the compressor, and a rectifier configured to receive alternating current from a first power source and to provide rectified direct current having a first voltage. The system also includes an inverter configured to receive the rectified... Agent: Foley And Lardner LLP Suite 500

- Ion pump device: The above-mentioned problem is solved by an ion pump (6) comprising a casing (1), a first electrode (2), a second electrode (3), a plurality of cylindrical magnets (4), and a connection part (5). The first electrode (2) is arranged inside the casing (1). The second electrode (3) is arranged on... Agent: Lawrence Y.d. Ho & Associates Pte Ltd

- Quad chamber mixing pump: A pair of dual chamber mixing pumps are combined which allow for a constant dispense rate profile using motor speed modulation. Each pump is divided into two chambers, the proximal chamber and the distal chamber. The chambers are defined in part by a piston having proximal and distal ends and... Agent: Miller, Matthias & Hull

- Submersible pump motor cooling through external oil circulation: An electrical submersible pump motor has motor oil flowing through external circulation tubes for cooling the motor. A substantial portion of the exterior of each tube is submerged in and exposed to wellbore fluid. Heat is transferred from the motor to the motor oil, and then circulated through the external... Agent: Bracewell & Giuliani LLP

- Suction shutoff valve: A suction shutoff valve of a compressor which includes a modulating valve. The modulating valve includes a valve disk for covering a valve aperture, a bellows in sealed engagement with the egress end of a valve body, and a valve stem connecting the valve disk and the bellows. A bellows... Agent: Delphi Technologies, Inc Legal Staff - M/c 483-400-402

- Packing nut lock and access bore cover locking assembly: A retaining system for securing a closure at an installed position within a bore. The bore being in a portion of a housing and having screw threads along at least a portion thereof. The closure having an internally threaded hold extending therein. The closure in the installed position closes the... Agent: Bracewell & Giuliani LLP

- Fan motor structure: A fan motor structure is provided. A fan is disposed within an accommodating hole at a center of a body. A permanent magnet and a printed circuit board (PCB) provided with plural coils are respectively disposed between an upper ring and a base of the body. An axial air gap... Agent: Morris Manning Martin LLP

- Electric compressor with integral inverter: An electric compressor provided with an integral inverter, incorporated with a motor and provided in a compressor housing with a motor drive circuit that includes the inverter. At least some of electric parts including the motor drive circuit are coated at an assembly-completed state with a resin material at a... Agent: Baker Botts LLP C/o Intellectual Property Department

- Downhole pumping system: A downhole motor and pump assembly for use in a tube has a support that suspends the assembly downhole, a housing capable of forming a seal against an inside surface of the tube to divide the tube into a lower region below the seal and an upper region above the... Agent: K.f. Ross P.C.

- Electric compressor with integral inverter: An electric compressor provided with an integral inverter, incorporated with a motor and provided in a receiving space surrounded by a compressor housing with a motor drive circuit that includes the inverter. At least some of electric parts including the motor drive circuit are coated at an assembly-completed state with... Agent: Baker Botts LLP C/o Intellectual Property Department

- Tube unit, control unit, and micropump: A micropump includes: a tube unit which includes a tube having elasticity and a circular-arc-shaped part, a plurality of fingers extending in radial directions from the circular-arc center of the circular-arc shape of the tube, and a tube guide frame which holds the tube and the plural fingers; a control... Agent: Harness, Dickey & Pierce, P.L.C

- Cooling fan with one-way clutch bearing: A cooling fan assembly, and method of operation, for use in an engine compartment of a vehicle is disclosed. The cooling fan assembly includes an electric motor having a motor shaft extending therefrom, a one-way clutch bearing mounted on and rotating with the motor shaft, and a cooling fan. The... Agent: Macmillan, Sobanski & Todd, LLC One Maritime Plaza

- Fan having a printed circuit board: A fan (20) has: a motor having a stator (40) and having a rotor (60) with at least one fan blade; at least one air inlet having an air entrance opening (102) for the inlet of air; at least one air outlet having an air exit opening (32) for the... Agent: Oliver Intellectual Property LLC

- Control device for a hydraulic piston machine with a variable flow rate: The invention relates to a control device for a hydraulic piston machine which can be embodied as a hydropump or a hydromotor and the time-averaged volume flow of which is variable. The piston machine comprises a plurality of pistons, each delimiting a working chamber the volume of which varies with... Agent: Michael J. Striker

06/03/2010 > patent applications in patent subcategories.

- sewage pumping: A method of flushing a wet well operating under a constant level pumping regime in a sewage system in which the wet well level is monitored and controlled along with the pump operation in response to a predicted period of reduced inflow. The method operates such that in advance of... Agent: Barlow, Josephs & Holmes, Ltd.

- Process for peristaltic pump control: A peristaltic pump is provided comprising squeezing elements moved by at least one actuator, which squeezing elements act on a tube in which a medium is conveyed, with the squeezing elements successively getting into and out of a squeezing engagement with the tube. A process for controlling the peristaltic pump... Agent: Roche Diagnostics Operations Inc.

- Multiple motors driving a single compressor string: Systems and methods of driving a compressor are provided. The compressor can be driven by multiple electric motors, which can be controlled by an adjustable speed drive (ASD) to increase efficiency. A torque controller may also be included.... Agent: Kellogg Brown & Root LLC Attn: Christian Heausler

- 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... Agent: Sidley Austin LLP

- Tandem piston pump: In a tandem piston pump (1) from which pump discharge pressure from four systems is extracted, a tilt axis direction of a front swash plate (14) and a tilt axis direction of a rear swash plate (54) are different to each other, respective discharge ports (23, 24) of a rear... Agent: Rabin & Berdo, PC

- Variable displacement swash plate type compressor: Provided is a variable displacement swash plate type compressor including a cylinder block having a plurality of cylinder bores, a front housing disposed in the front of the cylinder block to form a swash plate chamber, a drive shaft rotatably supported by the cylinder block, a lug plate disposed in... Agent: Hamre, Schumann, Mueller & Larson, P.C.

- Air supply fan device: An air supply fan device including: a fan casing disposed continuously to a combustion chamber containing a gas burner therein; an air supply fan contained inside of the fan casing, for supplying burning air to the gas burner; and a motor disposed outside of the fan casing, for rotating the... Agent: Turocy & Watson, LLP

- Rotating electric machine and compressor: A rotating electric machine for a compressor includes a case, a plurality of teeth, coils and insulating films. The teeth are circumferentially arranged around a predetermined axis forming a center of the teeth. Each tooth has a first end disposed radially at an opposite side thereof from the predetermined axis.... Agent: GlobalIPCounselors, LLP

- Miniature pump device with an anti-free flow valve: A miniature unidirectional valve configured to restrict the free flow of fluid through the valve includes a valve body having an inlet and an outlet. A flexible membrane is movably disposed over the inlet and outlet, and movable between an open position and a closed position. The flexible membrane is... Agent: Thorpe North & Western, LLP.

- Rotary blood pump: Various “contactless” bearing mechanisms including hydrodynamic, hydrostatic, and magnetic bearings are provided for a rotary pump as alternatives to mechanical contact bearings. These design features may be combined. In one embodiment, a pump housing has a spindle extending from a wall of the pump housing into a pumping chamber defined... Agent: Inskeep Intellectual Property Group, Inc

- Pump valve retainer: A retainer for movably securing a valve member within a fluid bore of a pump comprises a retainer head which includes at least one peripheral groove and a retainer hub which is connected to or formed integrally with the retainer head. The valve member is movably coupled to the retainer... Agent: Henry C. Query, Jr.

- Double-piston mechanism of an emulsion squeeze head: The present invention provides a double-piston mechanism of an emulsion squeeze head, having an actuating syringe and a suction pipe. A top of the suction pipe is connected to a pressing head, while an elastic resetter is arranged between the bottom of the suction pipe and the bottom wall of... Agent: Egbert Law Offices

Previous industry: Fluid reaction surfaces (i.e., impellers)
Next industry: Rotary expansible chamber devices


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