Relatively Movable Pumping Members Patents (Class 417/419)
  • Patent number: 10823468
    Abstract: A compressor (20) has a case (22) and a crankshaft (38). The case has a number of cylinders (30-32). For each of the cylinders, the compressor includes a piston (34) mounted for reciprocal movement at least partially within the cylinder. A connecting rod (36) couples each piston to the crankshaft. A pin (44) couples each connecting rod to the associated piston. Each pin has first (52) and second (53) end portions mounted to first (56) and second (57) receiving portions of the associated piston and a central portion (48) engaging the associated connecting rod. For each of the pistons a pair of first and second at least partially non-metallic plugs have respective stems received in the pin first and second end portions and respective heads facing a wall surface of the associated cylinder.
    Type: Grant
    Filed: January 3, 2019
    Date of Patent: November 3, 2020
    Assignee: Carrier Corporation
    Inventors: Matthew J. Mowers, Paul J. Flanigan, Russell G. Lewis
  • Patent number: 10788027
    Abstract: An electric air pump is provided that includes (i) a motor that includes a rotary shaft provided with a worm, (ii) a crank that includes a worm wheel which engages with the worm and a rod with one end rotatably coupled to the worm wheel, and (iii) a piston that is housed in a cylinder extending along an axial direction of the motor, that is coupled to another end of the rod and moves back and forth along an extension direction of the cylinder due to actuation of the crank, and that ejects air inside the cylinder from a valve provided at one end of the cylinder due to being moved toward the one end side of the cylinder.
    Type: Grant
    Filed: November 16, 2016
    Date of Patent: September 29, 2020
    Assignee: DENSO CORPORATION
    Inventor: Keita Kawai
  • Patent number: 10572636
    Abstract: A method comprising using at least one hardware processor for receiving a plurality of media files captured in real-time by a sensor of a client terminal, wherein each of the plurality of media files comprises data captured from the environment surrounding the client terminal. The method comprises extracting a plurality of captured media fragments from the plurality of media files. The method comprises retrieving a plurality of random media fragments from a database. The method comprises sending the plurality of captured media fragments and the plurality of random media fragments to the client terminal or to a different client terminal, for presentation to a user in an arbitrary order. The method comprises receiving from the client terminal or the different client terminal a selection of the plurality of captured media fragments. The method comprises sending a user authentication to a secure server module based on the selection.
    Type: Grant
    Filed: June 1, 2017
    Date of Patent: February 25, 2020
    Assignee: International Business Machines Corporation
    Inventors: Yair Allouche, David Asulin
  • Patent number: 9528508
    Abstract: A pump has power and fluid ends wherein one or more of the drive rods are offset from the plungers. An offset coupler connects a drive rod to an offset plunger. A method includes connecting the offset power end to the standard fluid end using the offset coupler. A repair and maintenance system includes inventories of standard fluid ends, power ends including offset power ends, and adapters, and a population of in service pumps, whereby the pumps can be repaired by removing and replacing the power ends from inventory using the adaptor where the replacement power end unit is offset. Another method includes removing and replacing the power end with one from the inventory, wherein the adapter is used in the case of an offset power end, whereby the offset and standard power ends may be used interchangeably.
    Type: Grant
    Filed: August 27, 2010
    Date of Patent: December 27, 2016
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Hubertus V Thomeer, Rod Shampine
  • Publication number: 20150044072
    Abstract: Compressor unit (12) of a compressor (10) for compressing refrigerant, comprising a drive device, particularly a drive shaft (24), for driving one or more pistons (14) that are arranged in a radial direction and that can be moved back and forth in extension and retraction movements in corresponding cylinder bores (16), wherein the drive device is in operative engagement with an eccentric (28) that controls the extension movement of the pistons (14), said eccentric (28) also controlling the retraction movement of the piston (14), the invention further relating to a corresponding compressor (10).
    Type: Application
    Filed: March 19, 2013
    Publication date: February 12, 2015
    Inventor: Arno Görlich
  • Patent number: 8851331
    Abstract: A fluid dispenser includes an adjustable dosing mechanism that permits adjustment of the amount of fluid to be dispensed. An adjustable dosing mechanism may be inserted into the dispenser in either a high dose orientation or a low dose orientation. The body further includes pair of dose adjusting flanges. When the adjustable dosing mechanism body is received into the dispenser in the high dose orientation, a relatively larger quantity of fluid product is dispensed. When the adjustable dosing mechanism body is received into the dispenser in the low dose orientation, a relatively smaller quantity of fluid product is dispensed.
    Type: Grant
    Filed: April 24, 2013
    Date of Patent: October 7, 2014
    Assignee: Ecolab USA Inc.
    Inventors: John T. Pelkey, Brian P. Carlson, Troy A. Anderson, Brian K. Stahel
  • Patent number: 8826698
    Abstract: A method for manufacturing a primary preform for an optical fiber wherein conditions are created in the reaction zone such that one or more glass layer packages made up of at least two separate glass layers are deposited on the interior of the substrate tube. A method for manufacturing a final preform as well as primary preforms, final preforms and optical fibers obtained therewith.
    Type: Grant
    Filed: September 20, 2012
    Date of Patent: September 9, 2014
    Assignee: Draka Comteq B.V.
    Inventors: Igor Millicevic, Mattheus Jacobus Nicolaas Van Stralen, Eugen Aldea, Gerardus Franciscus Cleven
  • Patent number: 8814540
    Abstract: A reciprocating compressor is provided. In one embodiment, a reciprocating compressor frame includes a central body and at least two crosshead guides extending from opposite sides of the central body. Additionally, the compressor frame crosshead guide support structures extending outwardly from the central body along a respective crosshead guide. Other embodiments of compression systems, devices, and frames of such systems are also provided.
    Type: Grant
    Filed: February 24, 2012
    Date of Patent: August 26, 2014
    Assignee: GE Oil & Gas Compression Systems, LLC
    Inventors: Omar M. Kabir, Zahroof Mohamed, Aaron R. Merritt, Kent Pearl
  • Publication number: 20130343934
    Abstract: A double acting dual stroke fluid pump with pressure assists is disclosed. First and second pistons are mounted to a common shaft which reciprocates during compression and suction strokes. During each of the strokes, fluid is pumped out at an outlet. This is accomplished by way of a one-way valve on the second piston. The one-way valve is opened or closed depending on whether the first and second pistons are in the compression or suction strokes. Additionally, pressure from the outlet assists in traversing the first and second pistons in the compression stroke. During the suction stroke, the fluid pressure applies a force on the first piston to counteract the fluid pressure on the second piston so that a smaller spring may be used. The size requirements of the solenoid and spring are reduced.
    Type: Application
    Filed: August 28, 2013
    Publication date: December 26, 2013
    Applicant: FOOTHILL LAND, LLC.
    Inventor: BENJAMIN R. DU
  • Publication number: 20130343918
    Abstract: A hydraulic pump includes a port and a piston assembly fluidically coupled to the port. The piston assembly includes a piston and a solid-state actuator, where a shape change of the solid-state actuator is induced when a field is applied to the solid-state actuator, and where alternating shape changes of the solid-state actuator provide reciprocating movement to the piston.
    Type: Application
    Filed: February 28, 2012
    Publication date: December 26, 2013
    Inventors: Michael L. Fripp, James H. Dudley
  • Patent number: 8596992
    Abstract: A pump system has a rotatory shaft and a rotatory drive arrangement coupled to the rotatory shaft for applying rotatory energy thereto. First through fourth pump arrangements are coupled to the rotatory shaft, each pump arrangement pumping a pulse of air during each rotation of the rotatory shaft, the first, second, third, and fourth pump arrangements pumping a corresponding pulse of air sequentially during each rotation of the rotatory shaft. The rotatory shaft has a first and second ends, and a central region therebetween where an electric motor is coaxially arranged. The first and third pump arrangements are coupled to the first end of the rotatory shaft, and the second and fourth pump arrangements are coupled to the second end of the rotatory shaft. Angularly displaced eccentric couplers couple the pump arrangements to the respective ends of the rotatory shaft.
    Type: Grant
    Filed: August 17, 2007
    Date of Patent: December 3, 2013
    Assignee: L•VAD Technology, Inc.
    Inventors: Paul G. DeDecker, Paul S. Freed
  • Publication number: 20130315758
    Abstract: A motor may comprise a stator and a rotor rotatable relative to the stator. A portion of the rotor may house a hydraulic pumping element of a hydraulic pump for effectuating movement of fluid from an inlet to an outlet thereby transforming the rotational power of the shaft into hydraulic power. Specifically, an electro-hydraulic pump may include a piston pump barrel assembly including a plurality of pistons arranged around a central axis for pumping hydraulic fluid and a cam for displacing the plurality of pistons when relative movement between the cam and the plurality of pistons occurs. A plurality of magnets may be fixedly attached to the outside of the piston pump barrel assembly, and electrical windings may radially surround the magnets and be configured to create a magnetic field when energized so as to cause the plurality of magnets and a portion of the piston pump barrel assembly to rotate relative to the windings, thereby actuating the plurality of pistons to pump hydraulic fluid.
    Type: Application
    Filed: March 20, 2013
    Publication date: November 28, 2013
    Inventor: Parker-Hannifin Corporation
  • Patent number: 8449274
    Abstract: A magnetic reciprocating pump includes a tube having ends defining intake and discharge ports, first and second magnetic plungers axially aligned within the tube of corresponding cross section for reciprocation therewithin, and a plurality of longitudinally spaced coils circumscribing the tube for driving the plungers axially when electrically energized. A gap is defined between the plungers so that the first plunger is slidable between one tube end and the second plunger and the second plunger is slidable between the other tube end and the first plunger. The first plunger closes one port when moved thereagainst and has a peripheral flow path permitting flow when moved away. The second plunger closes the other port when moved thereagainst and has an outer peripheral flow path and a communicating inner axial flow path permitting flow when moved away. The plungers when moved together close the second plunger axial flow path.
    Type: Grant
    Filed: March 10, 2011
    Date of Patent: May 28, 2013
    Assignee: SIELC Technologies Corporation
    Inventor: Yury Zelechonok
  • Patent number: 8241015
    Abstract: The invention refers to a linear compressor, comprising: a shell (20); a cylinder (30) affixed to the shell (20) and defining a compression chamber (C); a piston (40) to be displaced in reciprocating movement in the interior of the compression chamber (C) during the operation of the compressor; a linear electric motor (50) mounted to the shell (20); and an actuating means (60) operatively coupling the piston (40) to the linear electric motor (50), in order to make the latter displace the piston (40) in a reciprocating movement in the interior of the compression chamber (C), the actuating means (60) being coupled to the piston (40) by an elastic means (70), so that the actuating means (60) and the piston (40) be displaced in phase opposition during the operation of the compressor.
    Type: Grant
    Filed: April 17, 2007
    Date of Patent: August 14, 2012
    Assignee: Whirlpool S.A.
    Inventors: Dietmar Erich Bernhard Lillie, Egidio Berwanger, Raul Bosco, Jr., Emerson Moreira, Davi Luis Goergen, Fabricio Caldeira Possamai
  • Patent number: 8192174
    Abstract: The invention concerns a refrigerant compressor (1), in particular a semi-hermetic refrigerant compressor, with a compressor block (5) comprising several cylinders arranged in a star shape, a motor, whose rotor is unrotatably connected to a crankshaft (11) that comprises a crank pin (22) and is supported in a bearing (13) in the compressor block (5), and a piston in each cylinder, each piston being connected via a connecting rod (23) to the crank pin (22), the connecting rod (23) comprising a bearing pad (24) that rests on the crank pin (22), the bearing pads (24) of all connecting rods (23) being held on the crank pin (22) by means of a ring arrangement (25). It is endeavored to keep the load on the crankshaft small. For this purpose, each connecting rod (23) has a power application point (49) at the crank pin (22), which is displaced in the direction of the bearing (13) in relation to the axial center of the crank pin (22).
    Type: Grant
    Filed: May 26, 2009
    Date of Patent: June 5, 2012
    Assignee: Danfoss A/S
    Inventors: Jürgen Süss, Christian Jepsen
  • Patent number: 8167588
    Abstract: A reciprocating compressor is provided with a reciprocating compressor frame which includes a central body and at least two crosshead guides extending from opposite sides of the central body. Additionally, the compressor frame has angled crosshead guide support structures extending outwardly from the central body along a respective crosshead guide.
    Type: Grant
    Filed: July 19, 2010
    Date of Patent: May 1, 2012
    Assignee: Cameron International Corporation
    Inventors: Omar M. Kabir, Zahroof Mohamed, Aaron R. Merritt, Kent Pearl
  • Patent number: 7942652
    Abstract: A reciprocating liquid or gas pump is driven by bi-directional force. A prime mover causes eccentric weights to rotate, which in turn cause pistons to be driven in linear paths under bi-directional force. This bi-directional force then drives opposing sets of pistons to pump a fluid. The pressurized fluid can then be used for, e.g., driving a hydraulic motor.
    Type: Grant
    Filed: November 29, 2009
    Date of Patent: May 17, 2011
    Inventor: Lawrence D. Murray
  • Patent number: 7726951
    Abstract: A fuel control system is provided in a single compact modular unit. The unit includes a motor driving a highly accurate cam-operated double-acting piston metering pump, both of which are contained in a liquid fuel environment. As the liquid fuel is pumped it works to cool internal components including the motor. An electronic motor drive is contained in a dry chamber of the unit for controlling operation of the motor and pump and is cooled indirectly by the fuel as well. A pressure sensitive flow divider is also included for selectively providing one or multiple output fuel flow paths depending upon whether a pressure threshold is reached, for example to send fuel to primary and secondary burner nozzles. Filter, filter bypass, pressure relief, and fuel shut-off components are also integrated into the single modular unit.
    Type: Grant
    Filed: June 20, 2005
    Date of Patent: June 1, 2010
    Assignee: Jansen's Aircraft Systems Controls, Inc.
    Inventors: Harvey B. Jansen, John F. Calleja, Raymond A. Forrester, Jr.
  • Patent number: 7654802
    Abstract: A reciprocating drive apparatus has a driving device and a driven device, one of the devices comprising a reciprocating member mounted for movement along a longitudinal axis. At least one rotary member is coupled to one of the devices and a linear bearing assembly has a linear guide rail and a linear slide member with an end coupled to the other device. A connecting link has a first end pivotally connected to the rotary member and a second end pivotally linked to the slide member. Where the reciprocating member is the driven device, rotation of the rotary member will cause the reciprocating member to move back and forth along the longitudinal axis.
    Type: Grant
    Filed: December 22, 2005
    Date of Patent: February 2, 2010
    Assignee: Newport Medical Instruments, Inc.
    Inventors: Richard William Crawford, Jr., Fang Zheng, Charles Edward Beuchat
  • Publication number: 20090097995
    Abstract: A syringe pump is disclosed, which uses the linear actuator applying a linear motion of a piezoelectric linear motor in moving the piston, such that suction and exhaustion of the fluid can be performed more precisely through controlling of power supply with respect to the piezoelectric linear motor. The syringe pump includes a cylinder which includes a receiving space, a piston which is mounted in the cylinder to pump liquid or powder in and out of the cylinder, and a piezoelectric linear actuator which moves the piston in a reciprocating manner. In addition, the piezoelectric linear actuator comprises a piezoelectric linear motor.
    Type: Application
    Filed: October 13, 2008
    Publication date: April 16, 2009
    Applicant: KOREA INSTITUTE OF MACHINERY & MATERIALS
    Inventors: Young-Bog Ham, Jung-Ho Park, So-Nam Yun, Woo-Suk Seo, Tae-Young Chung
  • Patent number: 6832900
    Abstract: A compact 180° opposed piston pump/compressor minimizes axial spacing between its pistons on the drive shaft and thereby reduces the shaking couple and noise from reciprocation. Each piston has its own eccentric element press-fit into the connecting rods so as not to occupy space between the pistons. The shaking couple can be further reduced for pistons of different masses by selecting the mass of the cup retainers to compensate for the difference in overall piston masses. The pump also includes an improved cylinder sealing arrangement having a circumferential groove in an angled surface at the end of the cylinder. The pump also has a special cover and seal for closing the open neck of the pump crankcase and an improved multi-lobed valve stop. The pump further uses tubular transfer members for transferring intake and/or exhaust air into the crankcase and/or between valve heads.
    Type: Grant
    Filed: January 8, 2003
    Date of Patent: December 21, 2004
    Assignee: Thomas Industries Inc.
    Inventor: Shawn A. Leu
  • Patent number: 6641377
    Abstract: In a compressor, a yoke constituting a linear drive section together with a driver coil, through which magnetic fluxes from a permanent magnet pass, is integrated with a cylinder and a container. A piston inserted into the cylinder is supported by springs, and the other end thereof faces an operating-gas-compressing space. The linear drive section is arranged parallel to the piston in a diametrical direction thereof. This construction reduces the longitudinal dimension of a piston portion. Further, a plurality of parts is combined together in a main body block, thereby reducing the number of parts required and improving the assembly accuracy.
    Type: Grant
    Filed: November 6, 2001
    Date of Patent: November 4, 2003
    Assignee: Fuji Electric Co., Ltd.
    Inventors: Kentaro Toyama, Yukio Yasukawa, Keishi Ohshima
  • Patent number: 6637625
    Abstract: A continuous operation metering valve, based on true volumetric positive displacement technology, uses an innovative dual rack and drive pinion design that enables the valve to dispense from one meter chamber while the other meter chamber is filling. This provides greater dispense cycle rates because it does not require a fill or reload period. With an optional encoder-controlled motor, the inventive metering valve is capable of almost unlimited precision dispensing with “on-the-fly” adjustment capability. The metering valve is easily disassembled and cleaned, using stainless steel wetted path components and Teflon seals for the widest range of chemical compatibility. An integral electronic board, mounted to the side of the valve, may be utilized to control the 4-way directional valve and motor direction (when not using a rotary encoder control).
    Type: Grant
    Filed: April 19, 2001
    Date of Patent: October 28, 2003
    Assignee: Delaware Capital Formation
    Inventor: Richard Jefferson
  • Patent number: 6634870
    Abstract: A hermetic refrigerant compressor including a compressor mechanism and a motor including a stator surrounded by a rotor attached to a crankshaft drivingly linked to the compressor mechanism. A first gap is formed between the rotor and stator, and a second gap is formed between the stator and the compressor mechanism. During compressor operation discharge gas expelled from the gas compression chamber travels through a discharge passage and a discharge plenum, and then through the first and second gaps. The rotor spinning during compressor operation causing a spinning vortex of refrigerant gas to occur in the discharge plenum, the vortex having an outer flow path of warmer gas and an inner flow path of cooler gas. The outer flow path of warmer gas generally travels through the second gap and the inner flow path of cooler gas generally travels through the first gap for enhanced motor cooling.
    Type: Grant
    Filed: January 3, 2002
    Date of Patent: October 21, 2003
    Assignee: Tecumseh Products Company
    Inventors: Nelik I. Dreiman, Rick L. Bunch
  • Patent number: 6616420
    Abstract: The invention relates to a pump assembly for a hydraulic brake system with traction control, having an electric motor and a piston pump. To reduce a bearing load, the invention proposes rotatably supporting and thereby radially bracing a motor shaft, or an eccentric sleeve pressed onto the motor shaft, on both sides of pump pistons. To economize on installation space, a pump bearing is disposed in an end of the eccentric sleeve that protrudes past the motor shaft.
    Type: Grant
    Filed: December 20, 2001
    Date of Patent: September 9, 2003
    Assignee: Robert Bosch GmbH
    Inventors: Norbert Alaze, Wolfgang Schuller, Erwin Sinnl
  • Patent number: 6499972
    Abstract: A linear compressor, comprises a retaining member, a fixed member supported by said retaining member and formed with a hermetically sealed compression chamber to receive a working fluid therein, a pair of pistons axially movably received in said compression chamber to assume respective compression positions, a pair of piston rods each having an outer peripheral portion and slidably movably supported by said fixed member, said piston rods respectively connected to said pistons to have said pistons axially move in said compression chamber, a plurality of magnet units mounted on each of said outer peripheral portions of said piston rods, each of said magnet units having a plurality of magnet segments each made of a permanent magnet and circumferentially arranged with neighboring two magnet segments different in magnetic pole, a plurality of electromagnet units supported by said retaining member to be axially spaced apart from each other in predetermined relationship with said magnet units, respectively, and resi
    Type: Grant
    Filed: May 22, 2001
    Date of Patent: December 31, 2002
    Assignee: Cryodevice Inc.
    Inventors: Shinichi Yatsuzuka, Yasumasa Hagiwara, Keiji Takizawa
  • Patent number: 6354818
    Abstract: A tightly closed casing has an inside space for storing coolant gas. A block is accommodated in this casing. A motor includes a stator and a mover. A piston is connected to the mover of the motor. A movable element includes the mover of the motor and the piston. A stationary element includes the stator of the motor and the block. An elastic element has a portion fixed to the movable element and another portion fixed to the stationary element. A cylinder is shiftable in an axial direction with respect the block. A shifting device shifts the cylinder in the axial direction.
    Type: Grant
    Filed: December 21, 2000
    Date of Patent: March 12, 2002
    Assignee: Matsushita Refrigeration Company
    Inventors: Ichiro Morita, Masanori Kobayashi, Koh Inagaki, Makoto Katayama
  • Patent number: 5501581
    Abstract: A magnetic fluid pump prevents the generation of particles and impurities, and is useful where particles and impurities are to be kept to a minimum, for instance in a resist coating process for manufacturing a semiconductor device. A pair of solenoid coils are wound on the outer surface of both of the ends of a a fluid transporting pipe. Inside the transporting pipe is a magnetic cylinder having a valve attached to one end which opens and closes the fluid path. The magnetic cylinder reciprocates back and forth inside the transfer pipe by changing the current direction of the coils. Fluid can be pumped continuously by reciprocation of the magnetic cylinder. The pump suppresses the generation of particles and impurities. When used in a resist coating process, the formation of a resist pattern having a poor profile during the photolithography processing can be prevented.
    Type: Grant
    Filed: February 24, 1995
    Date of Patent: March 26, 1996
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Woo-sung Han
  • Patent number: 5263978
    Abstract: A blood pump housing (43) accommodates at least one piston (21a,21b) driven by a coupling point (19a,19b) on a triangular closed hypocycloidal path (Z.sub.a, Z.sub.b). The piston (21a,21b) is provided for periodically pressing and releasing a blood chamber (37a,37b). One of the corners of the triangular closed hypocycloidal path (Z.sub.a,Z.sub.b) is directed towards the piston (21a,21b), so that the piston movements substantially consist of three periods, i.e. an advance stroke period, a return stroke period and a stationary stroke period.
    Type: Grant
    Filed: September 9, 1992
    Date of Patent: November 23, 1993
    Assignee: Forschungsgesellschaft fur Biomedizinische Technik e.V.
    Inventors: Ralf Kaufmann, Helmut Reul, Guenter Rau, Ralf Bitdinger
  • Patent number: 4844705
    Abstract: A compressor assembly is disclosed including a compressor mechanism mounted within a hermetically sealed housing. The compressor mechanism includes a crankcase having a suction inlet opening providing communication into a suction cavity within the crankcase. A suction line adaptor is provided for attaching to a suction line of a refrigeration system to introduce suction gas into the suction inlet opening. The suction line adaptor includes a fitting mounted to the sidewall of the housing. The fitting defines a bore communicating through the housing wall. A radially outwardly extending annular groove is provided in the sidewall of the bore. A section of tubing having a washer-shaped flange at one end thereof extends between the fitting and the suction inlet opening. The tube section end opposite the flange is sealingly received at a variable depth within the suction inlet opening using an O-ring seal. The other end of the tube section is received within the bore with the flange received within the groove.
    Type: Grant
    Filed: January 25, 1988
    Date of Patent: July 4, 1989
    Assignee: Tecumseh Products Company
    Inventor: Edwin L. Gannaway
  • Patent number: 4838769
    Abstract: A compressor assembly is disclosed including a compressor mechanism mounted within a hermetically sealed housing. The compressor mechanism includes a crankcase having a suction inlet opening providing direct communication into a suction cavity within the crankcase. The compressor mechanism is located in an upper chamber of the housing and a motor is located in a lower chamber, the entire interior of the housing being at discharge pressure. Suction gas is isolated from the motor so that heat from the motor does not increase the temperature of the suction gas. The discharge tube is positioned in the lower chamber so that discharge gas flows over the motor to cool it, thereby improving efficiency.
    Type: Grant
    Filed: January 25, 1988
    Date of Patent: June 13, 1989
    Assignee: Tecumseh Products Company
    Inventor: Edwin L. Gannaway
  • Patent number: 4836755
    Abstract: In a low capacity compressor, the shaft (20) of the drive motor carries a fan wheel (42) including a crank pin (46) formed integral therewith. The lower end of a connecting rod (62) is journalled on the crank pin (46). The portion of the fan wheel (42) opposing the crank pin (46) is formed with an arc shaped balancing rib (82) having an angular extension of 180.degree.. Precise balancing of the piston/fan wheel unit is obtained by cutting material from the initially oversized balancing rib (82) and/or cutting from the portion of the fan wheel (42) being opposed to the balancing rib (82) so that a balancing groove (102) is obtained.
    Type: Grant
    Filed: March 22, 1988
    Date of Patent: June 6, 1989
    Assignee: Durr Dental GmbH & Co KG
    Inventors: Klaus D. Nitsche, Johann P. Zsiga
  • Patent number: 4753581
    Abstract: A multi-lobe gradient cam for a high performance liquid chromatography pump for controlling proportions of HPLC solvents on the low pressure side of the pump. The gradient cam is non-concentric, and has an upward or draw gradient ridge over a majority of its circumference and a downward or thrust gradient over a minority of its circumference. In operation, the cam is designed to be used with two followers, located 180.degree. apart, which follow along the cam's gradient. The unique cut of the multi-lobe cam insures a constant suction on the inlet or suction side of the cam during the entire pump cycle.
    Type: Grant
    Filed: February 10, 1987
    Date of Patent: June 28, 1988
    Assignee: Milton Roy Company
    Inventor: Benjamin Hiscock
  • Patent number: 4718832
    Abstract: Electromagnetic reciprocating pump including a plurality of pumps combined in such a manner that the mode of connection between the suction inlet and the discharge outlet in each of the pumps is allowed to be changed and, as the result, the amount of suction or discharge or the degree of vacuum or compression is allowed to be selected at a multiplicity of stages without any loss of the energy of the alternating current power. The plurality of pumps are disposed in such a manner that the axes of their respective pistons intersect one another at one point and the pumps themselves are rotationally symmetrical with respect to the point mentioned above.
    Type: Grant
    Filed: February 10, 1986
    Date of Patent: January 12, 1988
    Assignee: Man Design Co., Ltd.
    Inventor: Shiro Takahashi
  • Patent number: 4671745
    Abstract: A magnetically-actuated, motorized pump includes a plurality of cylinders extending at radially-spaced intervals between first and second heads. Each cylinder reciprocably receives a piston assembly including a pair of permanent magnets with outwardly-extending poles. Inlet and outlet valves are each provided at opposite ends of the cylinders. First and second rotors are each rotatably mounted at a respective end of the pump outside of a respective head. Each rotor includes a concentric ring comprising alternating permanent magnets and electromagnets for reciprocating the piston assemblies. Perimeter magnets are provided on the first rotor and the first head for interacting whereby rotary motion is imparted to the rotors. The electromagnets are actuated by an electrical distribution system.
    Type: Grant
    Filed: March 21, 1986
    Date of Patent: June 9, 1987
    Inventor: Raymond H. Smith
  • Patent number: 4648809
    Abstract: A device for conveyance of a pressure medium, especially pressure oil, has an electric motor with a vertical shaft and a pump driven by this shaft. The housing has a bottom part. To absorb the operational noises of the device, the bottom part is constructed as stable element of large mass. The electric motor and its housing are fastened on the bottom part.
    Type: Grant
    Filed: November 9, 1984
    Date of Patent: March 10, 1987
    Assignee: Flutec Fluidtechnische Gerate GmbH
    Inventor: Karl Gensberger
  • Patent number: 4615661
    Abstract: A magnetic pump having a housing or block with three compartments and a port for supplying fluid into the center compartment. A pair of receivers are mounted in the center compartment and have check valves to allow fluid to flow into the receivers and outlets for conducting fluid out of the receivers. A sliding sleeve is mounted near each receiver and is reciprocal between two positions in which fluid is enclosed on one side of the receiver or the other. A piston assembly, mounted within each sleeve, is reciprocal to force the enclosed fluid from within the sleeve through the check valves into the receiver. The sleeves and the pistons are reciprocated electromagnetically. The cycle of the sleeves slightly preceeds the cycle of the pistons.
    Type: Grant
    Filed: November 26, 1985
    Date of Patent: October 7, 1986
    Inventor: Jimmy L. King
  • Patent number: 4597720
    Abstract: A cleaning apparatus for wet cleaning building walls and/or floors and the like by means of high-pressure jet of cleaning liquid, which includes a pump driven by an electromotor. The pump and the electromotor are carried on a common shaft formed with a central passage and two opposite cross bores provided at the upper end thereof. The housing of the apparatus is filled with an electrically non-conductive coolant separated from the cleaning liquid. The parts of the pump through which the washing cleaning circulates are exposed to the coolant circulating through the central passage and cross bores of the shaft.
    Type: Grant
    Filed: July 27, 1981
    Date of Patent: July 1, 1986
    Inventor: Ingo H. Friedrichs
  • Patent number: 4594056
    Abstract: A hydraulic pump unit, comprising an electric motor, the stator (5) of wh is disposed in a housing defining an oil reservoir and the rotor of which is mounted on a shaft which drives a hydraulic pump. Each front end of said stator is associated with an end shield for a shaft bearing. A pump element or the pump is secured to at least one end shield. Elongated connecting members which are distributed about said shaft in the circumferential direction support said end shields. The connecting members are designed as rods (17), abut against the outer circumference (7) of said stator (5) and, in the undeformed state, guide said stator in a close sliding fit. At least one tightening strap (19) encompasses said rods (17) and the outer stator circumference (7) for deforming said rods (17) until said stator is fixed in position and for pressing said rods against the stator circumference. A means for preventing rotation can be provided between said stator and said rods or said tightening strap.
    Type: Grant
    Filed: September 8, 1980
    Date of Patent: June 10, 1986
    Assignee: Heilmeier & Weinlein, Fabrik fur Oel-Hydraulik GmbH & Co., KG
    Inventor: Rudolf Brunner
  • Patent number: 4544334
    Abstract: A refrigerant compressor (10) including a compression mechanism (18) resiliently supported within a sealed outer casing (12) is provided with means for maintaining the air gap between the rotor (40) and stator (42) of the electric drive motor (20) for the compression mechanism. The rotor is secured to a drive shaft or crankshaft (26) journaled in the compression mechanism. The stator is bolted to the compression mechanism. The means for maintaining the air gap comprises a plurality of balls made from a relatively hard material, which are indented into the relatively softer material of the stator and of the compressor body during assembly of the stator to the compressor body. The stator is fixed relative to the compressor body and to the rotor journaled in the compressor body, thus maintaining the air gap between the stator and the rotor during shipping and handling.
    Type: Grant
    Filed: February 29, 1984
    Date of Patent: October 1, 1985
    Assignee: Lennox Industries, Inc.
    Inventor: Charles B. Ellis
  • Patent number: 4518326
    Abstract: The motor compressor comprises a hermetic casing in which are mounted a reciprocating compressor and a reversible electric motor having a common vertical shaft with an axial duct for conveying lubricating oil from a centrifugal pump located at the lower end of the shaft to an outlet located at its upper end. The outlet of the axial duct is constituted by an elbow tube which is fixed to the upper end of the shaft and has an inclined end portion extending upwardly and radially outwardly with respect to the axis of the shaft.
    Type: Grant
    Filed: September 7, 1982
    Date of Patent: May 21, 1985
    Assignee: Aspera A.p.A.
    Inventors: Federigo Peruzzi, Marek Zgliczynski
  • Patent number: 4518317
    Abstract: A fluid pumping system including a variable-volume, fluid-reception chamber having an inlet conduit leading from a fluid supply site and an outlet conduit leading to a fluid delivery site. An elongated plunger body is drivingly coupled with the chamber and linearly reciprocable along its longitudinal axis so as to alternately expand and contract the volume of the chamber, thereby alternately drawing a fluid into the chamber through the inlet conduit from the fluid supply site and pumping the fluid through the outlet conduit towards the delivery site. The linear reciprocation of the plunger body is effected by an electromagnetically operated drive, preferably a linear motor drive, at a rate of reciprocation in the range of 0.01 to 10 Hz.
    Type: Grant
    Filed: August 12, 1983
    Date of Patent: May 21, 1985
    Assignee: Inoue-Japax Research Incorporated
    Inventor: Kiyoshi Inoue
  • Patent number: 4470772
    Abstract: A direct suction radial compressor having a crankcase therein dividing the compressor into an upper chamber and a lower chamber sealed one from the other, and suction inlet tubing extending through the top portion of the upper chamber for delivering refrigerant to the compressor. A suction chamber is disposed in the crankcase and sealed from the upper chamber and in communication with the suction inlet tubing, and a plurality of radially disposed cylinders are disposed in the crankcase. Positioned between the suction inlet and the cylinders is a centrifuging assembly that separates liquid refrigerant and oil from gaseous refrigerant, and returns the liquids through a unique network of passageways to an oil sump in the lower chamber.
    Type: Grant
    Filed: May 20, 1982
    Date of Patent: September 11, 1984
    Assignee: Tecumseh Products Company
    Inventor: Edwin L. Gannaway
  • Patent number: 4396361
    Abstract: A hermetically sealed reciprocating motor compressor unit including a sealed shell. Discharge gas from the compressor is passed through the motor via suitable flow passages. The top of the motor and the interior surface of the shell define a chamber therebetween. The rotor functions as a centrifuge for separating the high pressure refrigerant gas from oil entrained therein. A substantially oil free vortex is formed encompassing a sector of the chamber defined by sides bearing 45.degree. relative to the vertical center line of the rotor. A refrigerant gas discharge tube connected to the top of the shell is located at any position which falls within the sector defining the vortex.
    Type: Grant
    Filed: January 31, 1979
    Date of Patent: August 2, 1983
    Assignee: Carrier Corporation
    Inventor: Howard H. Fraser, Jr.
  • Patent number: 4365942
    Abstract: A pump includes a pump housing defining a pumping chamber and having two opposite end walls and a piston arranged in the pumping chamber for alternating motion towards and away from the end walls for drawing a cryogenic liquid into and driving it out of the pumping chamber. There are further provided first and second superconducting energizing coils mounted on respective end walls for generating a radial electromagnetic field in the pumping chamber. The energizing coils are coaxial with the piston axis. A superconducting control coil is fixedly mounted on the piston for generating a further magnetic field in the pumping chamber. The control coil is coaxial with the piston axis. The energizing coils and the control coil form part of an electromagnetic drive for generating, in the pumping chamber, an electromagnetic force which propels the piston back and forth between the end walls. Further, a bellows is affixed to peripheral regions of the piston and to the end walls for enclosing the pumping chamber.
    Type: Grant
    Filed: December 15, 1980
    Date of Patent: December 28, 1982
    Assignee: Kernforschungszentrum Karlsruhe GmbH
    Inventor: Curt Schmidt
  • Patent number: 4358254
    Abstract: A variable capacity compressor for refrigeration systems such as air conditioners and heat pumps comprising an outer casing having a lubricant sump in the lower portion thereof, a crankcase internally spring mounted within the outer casing and having a pair of parallel, vertical crankshafts rotatably supported therein, wherein the crankshafts are arranged in side-by-side relationship, and at least two expansible chamber pumps, which may be piston, rotary or screw type, driven by the crankshafts. A pair of independently controlled electric motors have their rotors drivingly connected to the crankshafts, and in one embodiment of the invention, the motors have a common stator with two independently controlled sets of windings. In a further embodiment, two crankcases are provided, sharing a common lubricant sump.
    Type: Grant
    Filed: September 22, 1980
    Date of Patent: November 9, 1982
    Assignee: Tecumseh Products Company
    Inventor: Billy B. Hannibal
  • Patent number: 4355960
    Abstract: A compressor refrigeration system employing a halocarbon refrigerant, has a lubricant composition in contact with the halocarbon refrigerant over the expected temperature range of the system, the lubricant composition having lubricity and chemical and thermal stability in the presence of halocarbon refrigerant at temperatures of up to at least 130.degree. C., the lubricant composition comprising a thermally stable oil with minor amounts of an alkyl polyhalophenyl ether.
    Type: Grant
    Filed: June 9, 1980
    Date of Patent: October 26, 1982
    Assignee: Westinghouse Electric Corp.
    Inventors: Gordon C. Gainer, Russell M. Luck
  • Patent number: 4252506
    Abstract: A variable capacity compressor for refrigeration systems such as air conditioners and heat pumps comprising an outer casing having a lubricant sump in the lower portion thereof, a crankcase internally spring mounted within the outer casing and having a pair of parallel, vertical crankshafts rotatably supported therein, wherein the crankshafts are arranged in side-by-side relationship, and at least two expansible chamber pumps, which may be piston, rotary or screw type, driven by the crankshafts. A pair of independently controlled electric motors have their rotors drivingly connected to the crankshafts, and in one embodiment of the invention, the motors have a common stator with two independently controlled sets of windings. In a further embodiment of the invention, two crankcases are provided, sharing a common lubricant sump.
    Type: Grant
    Filed: September 1, 1978
    Date of Patent: February 24, 1981
    Assignee: Tecumseh Products Company
    Inventor: Billy B. Hannibal
  • Patent number: 4200426
    Abstract: A hermetic compressor assembly is disclosed wherein a motor-compressor unit is supported in a hermetically sealed chamber so as to permit at least limited rotation thereof about an axis which may coincide with the axis of the drive shaft of the compressor. In order to limit such rotation, at least a first leaf spring member is provided affixed to one of the interior wall of the chamber and the motor-compressor unit, which member cooperates with abutment means affixed to the other of said interior wall and motor compressor unit whereby, upon rotation of the motor-compressor unit about said axis, engagement between the abutment means and the leaf spring member results in deflection thereof so as to limit such rotation.
    Type: Grant
    Filed: October 26, 1978
    Date of Patent: April 29, 1980
    Assignee: The Trane Company
    Inventor: Peter J. Linnert
  • Patent number: 4152956
    Abstract: An improved vehicle driven air conditioning compressor having a rotatable crankshaft and eccentric reciprocating pistons in which there is provided a spring system connected to the eccentric in such a manner that peak valves of torque during compression are minimized.
    Type: Grant
    Filed: August 8, 1977
    Date of Patent: May 8, 1979
    Inventor: Rudolf Hintze