Relatively Movable Pumping Members Driven By Relatively Movable Working Members Patents (Class 417/338)
  • Patent number: 11732719
    Abstract: A dual pump unit having a pair of pumps that provide parallel hydraulic paths, and are configured to operate concurrently in opposite rotational directions. The dual pump unit has a sealed casing which includes a suction flange, two volutes in hydraulically parallel configuration, and a discharge flange. The pair of pumps are located within a respective volute of the casing and, in an example, are radially inline and horizontally inline. The casing may include a flattened bottom. Each pump may include a touchscreen for configuration of the respective pump. The pumps are controllable to circulate a circulating medium to collectively provide output to source a load.
    Type: Grant
    Filed: May 29, 2017
    Date of Patent: August 22, 2023
    Assignee: S.A. Armstrong Limited
    Inventors: Gabor Lechner, Marcelo Javier Acosta Gonzalez, Rohit Mohindra, Santhosh Vijayan
  • Patent number: 11486401
    Abstract: A sump pump system having a primary pump, a fluid level sensor, and a primary controller electrically connected to the primary pump for activating the pump when the fluid level sensor indicates a predetermine fluid level has been reached, the primary controller having a primary interface for communicating with a secondary pump. In some forms, the system includes a secondary pump having a secondary controller electrically connected to the secondary pump and having a secondary interface, the primary and secondary interfaces allowing the primary and secondary pump controllers to communicate with one another and allowing at least one of the primary and secondary pump controllers to assume control of both the primary and secondary pump. Related methods are further described herein.
    Type: Grant
    Filed: February 18, 2020
    Date of Patent: November 1, 2022
    Assignee: Wayne/Scott Fetzer Company
    Inventor: Philip Anthony Mayleben
  • Patent number: 11242851
    Abstract: A linear actuator system includes a linear actuator and at least one proportional control valve and at least one pump connected to the linear actuator to provide fluid to operate the linear actuator. The at least one pump includes at least one fluid driver having a prime mover and a fluid displacement assembly to be driven by the prime mover such that fluid is transferred from the pump inlet to the pump outlet. The linear actuator system also includes a controller that establishes at least one of a speed and a torque of the at least one prime mover and concurrently establishes an opening of the at least one proportional control valve to adjust at least one of a flow and a pressure in the linear actuator system to an operational set point.
    Type: Grant
    Filed: November 27, 2019
    Date of Patent: February 8, 2022
    Assignee: PROJECT PHOENIX, LLC
    Inventor: Thomas Afshari
  • Patent number: 11118581
    Abstract: A pump having at least two fluid drivers and a method of delivering fluid from an inlet of the pump to an outlet of the pump using the at least two fluid drivers. Each of the fluid drives includes a prime mover and a fluid displacement member. The prime mover drives the fluid displacement member to transfer fluid. The fluid drivers are independently operated. However, the fluid drivers are operated such that contact between the fluid drivers is synchronized. That is, operation of the fluid drivers is synchronized such that the fluid displacement member in each fluid driver makes contact with another fluid displacement member. The contact can include at least one contact point, contact line, or contact area.
    Type: Grant
    Filed: February 2, 2018
    Date of Patent: September 14, 2021
    Assignee: PROJECT PHOENIX, LLC
    Inventor: Thomas Afshari
  • Patent number: 10677239
    Abstract: Start-stop engine systems for a turbocharged engine have a bypass with fluid flow from upstream of the compressor or downstream of the compressor to a position between the throttle and the engine, or from between the compressor and throttle to a position upstream of the compressor with a Venturi device in the bypass. A device requiring vacuum is in fluid communication with a suction port of the Venturi device. An electronic vacuum pump is added that is in fluid communication with the device requiring vacuum or with the Venturi device. The electronic vacuum pump is operated during a stop condition of the start-stop engine to replace the vacuum generated by the Venturi device or to provide a pressure drop across the Venturi device so the Venturi device continues to generate vacuum for the device requiring vacuum.
    Type: Grant
    Filed: September 21, 2018
    Date of Patent: June 9, 2020
    Assignee: Dayco IP Holdings, LLC
    Inventors: Keith Hampton, David E. Fletcher, Brian M. Graichen, James H Miller
  • Patent number: 10539134
    Abstract: A linear actuator system includes a linear actuator and at least one proportional control valve and at least one pump connected to the linear actuator to provide fluid to operate the linear actuator. The at least one pump includes at least one fluid driver having a prime mover and a fluid displacement assembly to be driven by the prime mover such that fluid is transferred from the pump inlet to the pump outlet. The linear actuator system also includes a controller that establishes at least one of a speed and a torque of the at least one prime mover and concurrently establishes an opening of the at least one proportional control valve to adjust at least one of a flow and a pressure in the linear actuator system to an operational set point.
    Type: Grant
    Filed: October 2, 2015
    Date of Patent: January 21, 2020
    Assignee: Project Phoenix, LLC
    Inventor: Thomas Afshari
  • Patent number: 10495365
    Abstract: A compressor system includes a first compressor and a second compressor. A suction equalization line fluidly couples the first compressor and the second compressor. A first branch suction line is fluidly coupled to the first compressor and a second branch suction line is fluidly coupled to the second compressor. A main suction line is fluidly coupled to the first branch suction line and the second branch suction line. An obstruction device is disposed in at least one of the first branch suction line and the second branch suction line. Responsive to deactivation of at least one of the first compressor and the second compressor, the obstruction device is at least partially closed thereby causing prescribed liquid levels in the first compressor and the second compressor during partial-load operation.
    Type: Grant
    Filed: March 21, 2017
    Date of Patent: December 3, 2019
    Assignee: Lennox Industries Inc.
    Inventors: Rakesh Goel, Siddarth Rajan, Patric Ananda Balan Thobias, Abdul Rehman
  • Patent number: 10174760
    Abstract: A gear pump has first and second meshing gears for pumping a fluid. The gear pump further has a first electrical motor having a first rotor, a first stator and first coil windings. The gear pump further has a second electrical motor having a second rotor, a second stator and second coil windings. The first rotor is operatively connected to the first gear and the second rotor is operatively connected to the second gear such that each gear is rotated by its respective rotor. The first and second coil windings are energized by respective and separate first and second electrical power circuits such that the first and second meshing gears can be driven independently of each other.
    Type: Grant
    Filed: September 2, 2016
    Date of Patent: January 8, 2019
    Assignee: ROLLS-ROYCE PLC
    Inventors: David Brookes, Martin K. Yates
  • Patent number: 9989979
    Abstract: An inflating module adapted to an inflatable object includes a pressure controlling assembly configured to monitor air pressure in the inflatable object after the inflatable body has been inflated and a supplemental air pressure providing device. The pressure controlling assembly is configured to automatically activate the supplemental air pressure providing device when the air pressure inside the inflatable object decreases below a predetermined threshold after inflation, and to control the supplemental air pressure providing device to provide supplemental air pressure to the inflatable object so as to maintain the air pressure of the inflatable object within a predetermined range.
    Type: Grant
    Filed: August 29, 2014
    Date of Patent: June 5, 2018
    Assignee: Team Worldwide Corporation
    Inventors: Cheng-Chung Wang, Chien-Hua Wang
  • Patent number: 9719507
    Abstract: The invention relates to a rotary lobe pump including a pump housing with a pump chamber, an inlet opening and an outlet opening. A first multi-lobed rotary piston is rotably mounted around a first axis in the pump chamber. A second multi-lobed rotary piston is rotably mounted around a second axis in the pump chamber and meshes with the first rotary piston. The first and second rotary pistons are rotated by a drive unit to create a fluid flow from the inlet opening to the outlet opening. The drive unit includes a first electric drive motor mechanically coupled with the first rotary piston and a second electric drive motor mechanically coupled with the second rotary piston.
    Type: Grant
    Filed: October 30, 2013
    Date of Patent: August 1, 2017
    Assignee: Hugo Vogelsang Maschinenbau GmbH
    Inventors: Paul Krampe, Hugo Vogelsang
  • Patent number: 9217589
    Abstract: The refrigeration compressor according to the invention comprises a sealed enclosure containing a compression stage (7) and provide with a refrigerant inlet and outlet (6, 18), the compressor being configured such that under usage conditions, a flow of refrigerant circulates through the refrigerant inlet, the compression stage, and the refrigerant outlet. The compressor has an oil pan (24) and oil recirculation means arranged to orient the oil contained in the oil pan into the flow of refrigerant when the oil in the oil pan exceeds a predetermined oil level (34). The recirculation means include a recirculation line (35) housed in the sealed enclosure and comprising an inlet port (36) situated at a height substantially corresponding to the predetermined oil level, an outlet port (37) emerging in the refrigerant flow, and an intermediate part (38) connecting the inlet and outlet ports. The intermediate part (38) includes a first portion (38a) extending below the predetermined oil level (34).
    Type: Grant
    Filed: October 22, 2012
    Date of Patent: December 22, 2015
    Assignee: DANFOSS COMMERCIAL COMPRESSORS
    Inventors: Patrice Bonnefoi, Philippe Dugast
  • Patent number: 8857674
    Abstract: A pump driver, a disposable pump cartridge for use with the pump driver and a beverage dispenser employing the pump drive are disclosed. The disposable pump cartridge comprises at least one barrel 20 having an inlet valve 24 and an outlet valve 26 associated therewith. A piston 28 movable within the barrel 20 is retained in a minimum volume position during transit by a protrusion 22 on the internal surface of the barrel 20. The piston 20 has a piston shaft 28 with a hollow end arranged, in use, to releasably engage a piston driver to drive the piston 28 from its minimum volume position to an operative position, and to reciprocate the piston 28 within the barrel 20 in its operative position to draw fluid into and pump fluid from the barrel 20 via the inlet valve 24 and outlet valve 26 respectively. Methods of engaging, disengaging and changing the disposable pump cartridge are also disclosed.
    Type: Grant
    Filed: January 9, 2008
    Date of Patent: October 14, 2014
    Assignee: Cornelius, Inc.
    Inventors: Richard John Nighy, Daniel Peterson Godfrey, Lucy Ann Sheldon, Nicholas Martin Broadbent, Sam Gilbert Willis
  • Patent number: 8721302
    Abstract: A fan assembly includes an active fan, a supporting base and a passive element. The active fan includes a first impeller and a motor. The passive element is driven to rotate by an airflow from the active fan. The passive element includes a impeller and at least one load. The load is connected to the impeller.
    Type: Grant
    Filed: October 20, 2010
    Date of Patent: May 13, 2014
    Assignee: Delta Electronics, Inc.
    Inventors: Shun-Chen Chang, Chia-Ming Hsu, Chieh-Cheng Liu
  • Publication number: 20140086761
    Abstract: A counter-rotating axial-flow fan device, which requires low power consumption and has an improved flow rate-static pressure characteristic, is provided at low cost. The counter-rotating axial-flow fan device includes a first axial-flow fan unit with first blades and a second axial-flow fan unit with second blades, which are connected in series. The first axial-flow fan unit includes a three-phase motor for rotating the first blades. The second axial-flow fan unit includes a single-phase motor for rotating the second blades. The first blades and the second blades rotate in a direction opposite to each other. In addition, the three-phase motor is driven by controlling the rotation speed thereof.
    Type: Application
    Filed: September 23, 2013
    Publication date: March 27, 2014
    Applicant: MINEBEA CO., LTD.
    Inventors: Fuminori ABE, Ming Hsiang KUO
  • Publication number: 20140058190
    Abstract: Systems and methods including a motor or electromagnets to control the movement of one or more pistons in a pumping chamber. The pumping chamber may include a pump inlet and a pump outlet in fluid communication with the pumping chamber. Surfaces on a piston or pumping chamber may include hydrodynamic bearing surfaces.
    Type: Application
    Filed: June 27, 2013
    Publication date: February 27, 2014
    Applicant: The Board of Regents of the University of Texas System
    Inventors: Jeffrey R. Gohean, Thomas D. Pate, Raul G. Longoria, Richard Smalling
  • Publication number: 20130294939
    Abstract: A fluid compression system is disclosed having a hermetically-sealed housing with at least two motors and a compressor arranged therein. The motors may be arranged either on both sides of the compressor or in a tandem configuration on one side of the compressor. The motors may be adapted to drive both the compressor and at least one blower device coupled to a free end of shaft that extends through the housing, the blower device being configured to circulate a cooling fluid throughout the housing and thereby cool the motors and any accompanying radial/axial bearings.
    Type: Application
    Filed: July 26, 2011
    Publication date: November 7, 2013
    Applicant: DRESSER-RAND COMPANY
    Inventors: Jose L. Gilarranz, Pascal Lardy
  • Publication number: 20130045117
    Abstract: An enhanced efficiency pumping apparatus, and general method of use, includes a counter-rotating motor with two oppositely rotating drive shafts with a first pump secured to the one of the drive shafts and a second pump secured to the other, oppositely rotating drive shaft.
    Type: Application
    Filed: August 10, 2012
    Publication date: February 21, 2013
    Inventor: Randell J. Wishart
  • Publication number: 20120164004
    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: Application
    Filed: August 27, 2010
    Publication date: June 28, 2012
    Inventors: Hubertus V. Thomeer, Rod Shampine
  • Patent number: 8171841
    Abstract: A detachable connecting rod includes a first member (410)a large end portion (411) having a trough hole (H1), and a first connection rod portion (412) extending from the large end portion (411), the first connection rod portion (412) having a pair of spaced apart arms defining a coupling groove (413) extending in the same direction as an axial direction of the through hole (H1); a second member (420) including a small end portion having a through hole (H2), and second connection rod portion (422) extending from the small end portion, the second connection rod (422) portion being inserted into the coupling groove (413) and a coupling unit for coupling the first connection rod portion (412) to the second connection rod portion inserted (412) into the coupling groove (413) of the first member (410). The detachable connecting rod is useable in a compressor.
    Type: Grant
    Filed: December 29, 2006
    Date of Patent: May 8, 2012
    Assignee: LG Electronics Inc.
    Inventors: Kyoung-Jun Park, Ji-Young Bae, Jin-Kook Kim, Bum-Joon Kim, Hyuk Nam, Jong-Mok Lee, Jong-Hyuk Kim, Kyeong-Ho Kim
  • Publication number: 20120087810
    Abstract: The invention relates to an improved multi-stage centrifugal compressor (10) comprising at least four centrifugal compression stages (11,12,13,14), each including an impeller. The impellers of one pair of the stages (12,13) are mounted on a first shaft (23) coupled to a first high speed direct drive motor (16), and the impellers of another pair of the stages (11,14) are mounted on a second shaft (24) coupled to a second high speed direct drive motor (15). The speed of the first and second motors is controlled by at least one drive (25) such that the impellers are all driven at the same speed.
    Type: Application
    Filed: December 23, 2009
    Publication date: April 12, 2012
    Inventor: Jouko Tapani Peussa
  • Patent number: 8147217
    Abstract: The invention relates to a pump device for feeding a delivery medium out of a deep borehole which leads from a floor level into the interior of the earth, which deep borehole is provided at least in sections with borehole piping, having a pump and having a motor which drives the pump. As a result of the motor being arranged outside the borehole piping and as a result of it being possible for the motor to be connected to the pump by means of torque transmitting means which extend laterally through the borehole piping, the motor can be protected from overheating, and in the event of a fault, can be pulled out of the deep borehole independently of the pump.
    Type: Grant
    Filed: May 4, 2007
    Date of Patent: April 3, 2012
    Assignee: Siemens Aktiengesellschaft
    Inventors: Jörg Lengert, Roland Lutz, Norbert Weinberg
  • Publication number: 20110070106
    Abstract: An air compressor structure includes a main body, a fixing plate and a cap member. The main body includes a pair of cylinders each having a fixture thereon. The fixture has a pair of first threaded holes. The fixing plate has a pair of second threaded holes corresponding to the first threaded holes. The cap member has a pair of third threaded holes corresponding to the first and second threaded holes. Fasteners are inserted through the first, second and third threaded holes to secure the main body, the fixing plate and the cap member together so as to minimize vibration when the compressor is working and to prevent the compressor from leakage through an air passage and a chamber.
    Type: Application
    Filed: September 18, 2009
    Publication date: March 24, 2011
    Inventor: YU-KUNG HUANG
  • Publication number: 20090123305
    Abstract: A detachable connecting rod includes a first member (410)a large end portion (411) having a trough hole (H1), and a first connection rod portion (412) extending from the large end portion (411), the first connection rod portion (412) having a pair of spaced apart arms defining a coupling groove (413) extending in the same direction as an axial direction of the through hole (H1); a second member (420) including a small end portion having a through hole (H2), and second connection rod portion (422) extending from the small end portion, the second connection rod (422) portion being inserted into the coupling groove (413) and a coupling unit for coupling the first connection rod portion (412) to the second connection rod portion inserted (412) into the coupling groove (413) of the first member (410). The detachable connecting rod is useable in a compressor.
    Type: Application
    Filed: December 29, 2006
    Publication date: May 14, 2009
    Inventors: Kyoung-Jun Park, Ji-Young Bae, Jin-Kook Kim, Bum-Joon Kim, Hyuk Nam, Jong-Mok Lee, Jong-Hyuk Kim, Kyeong-Ho Kim
  • Patent number: 7524173
    Abstract: A fluid end for a duplex mud pump. In one implementation, the fluid end includes two liner blocks, each having a central passage. The fluid end further includes two fluid inlets disposed on a side portion and two fluid outlets disposed on a top portion and a suction manifold displaced from the two liner blocks. The suction manifold comprises four flanges. The fluid end further includes four suction valve blocks, each having a bottom portion removably coupled to one of the four flanges and a side portion removably coupled to the side portion of the liner block, and four discharge valve blocks, each having a bottom portion removably coupled to the top portion of the liner block.
    Type: Grant
    Filed: November 1, 2007
    Date of Patent: April 28, 2009
    Assignee: EC Tool and Supply Company
    Inventor: Milburn Eugene Cummins
  • Publication number: 20090104052
    Abstract: A pump that has a flangeless valve plate, meaning that the valve plate has no flange through which bolts that secure the head to the pump extend. The pump has eccentrics and pistons that all have holes in them so that the pistons at opposite ends of the pump can be assembled to the shaft of the motor 180° out of phase. The pump further has a monolithic head that includes the two head members of the pump and the tube that connects them also has an integrally formed port. The pump is supported by elastomeric tubular members from its ports. The pump has a push-in fitting that can be pushed into a hole in a member such as the head, the housing or the base so that once pushed in, a ring around the fitting expands outwardly behind an edge of the body to trap the fitting in the opening.
    Type: Application
    Filed: December 29, 2008
    Publication date: April 23, 2009
    Inventors: SHAWN A. LEU, Stephen M. Moretti
  • Patent number: 7354256
    Abstract: A fluid end for a duplex mud pump. In one implementation, the fluid end includes two liner blocks, each having a central passage. The fluid end further includes two fluid inlets disposed on a side portion and two fluid outlets disposed on a top portion and a suction manifold displaced from the two liner blocks. The suction manifold comprises four flanges. The fluid end further includes four suction valve blocks, each having a bottom portion removably coupled to one of the four flanges and a side portion removably coupled to the side portion of the liner block, and four discharge valve blocks, each having a bottom portion removably coupled to the top portion of the liner block.
    Type: Grant
    Filed: September 28, 2006
    Date of Patent: April 8, 2008
    Assignee: EC Tool and Supply Company
    Inventor: Milburn Eugene Cummins
  • Patent number: 6874996
    Abstract: The hybrid compressor apparatus is composed of a compressor in which fluid is compressed by varying a volumetric capacity of a compression space provided between a first compression member and a second compression member, which are movable independently of each other, according to rotation of the first compression member relative to the second compression member, a motor rotatable upon receipt of power of an external electric source, and a driven member rotatably driven by motive force transmitted from an external driving source. The first compression member is connected with the driven member and the second compressor is connected with the motor. If maximum discharge amount is required for the compressor, the motor is driven separately by a control device when the driven member drives the first compression member so that the second compression member is rotated in a direction opposite to that of the first compression member.
    Type: Grant
    Filed: January 13, 2003
    Date of Patent: April 5, 2005
    Assignee: Denso Corporation
    Inventor: Shigeki Iwanami
  • Patent number: 6648608
    Abstract: A main unit pumps the transferred liquid actuated by an auxiliary unit for pumping a working liquid. The auxiliary unit comprises a piston provided with an axial drilling (bore) for circulating working liquid between a tank and a compression chamber. The piston further comprises a valve for closing the drilling, the valve housed in the drilling between two ends thereof in permanent communication with the tank and the compression chamber respectively. The valve opens when the pressure of the working liquid in the tank exceeds that of the working liquid in the compression chamber and closes in the opposite situation. The compression chamber is delimited by a flexible diaphragm for pumping transferred liquid. The diaphragm is constantly elastically returned to the first position by a diaphragm spring.
    Type: Grant
    Filed: December 10, 2001
    Date of Patent: November 18, 2003
    Assignees: Peugeot Citroen Automobiles SA, Siemens VDO Automotive
    Inventor: Jean-Marc Robert
  • Patent number: 6506032
    Abstract: An object of the present invention is to provide a high-efficiency and reliable linear compressor in which even when a pressing force is applied to its piston, the piston is turnably connected and supported through a connecting rod so that sliding surface pressure between the piston and a cylinder is not increased. The invention provides a linear compressor comprising a cylinder supported in a hermetic vessel by a support mechanism, a piston slidably supported by the cylinder along its axial direction, a spring member for applying an axial force to the piston, a connecting mechanism for connecting the piston and the spring member with each other, and a linear motor having a stator coupled to the cylinder and a moving member coupled to the piston, wherein and the connecting mechanism is connected to the piston such the connecting mechanism can rock with respect to the piston.
    Type: Grant
    Filed: February 12, 2001
    Date of Patent: January 14, 2003
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Sadao Kawahara, Teruyuki Akazawa
  • Patent number: 5839888
    Abstract: A pump system has first and second pumps. Each pump has a housing, which housing has an inboard end and an outboard end. The pumps are arranged so that the inboard ends are adjacent to each other. The inboard ends each have a crankshaft, while the outboard ends each have an output manifold. Each crankshaft is connected to a plunger by way of a connecting rod and a crosshead. The crosshead reciprocates inside of a cylinder. The crosshead has an axis that is coplanar with a rotational axis of the crankshaft. The connecting rod is connected to the crosshead by way of a wrist pin. The wrist pin is offset from the cylinder axis in order to allow the respective pump to be compact in length. The first and second pumps are on a trailer. In the first pump, the wrist pin is offset on one side of the respective cylinder axis, while in the second pump, the wrist pin is offset on the opposite side of the respective cylinder axis.
    Type: Grant
    Filed: March 18, 1997
    Date of Patent: November 24, 1998
    Assignee: Geological Equipment Corp.
    Inventor: Curtis Harrison
  • Patent number: 5314312
    Abstract: A fluid-rotating apparatus comprises a positive displacement pump structure section for rotating the rotary shaft of each of a plurality of rotors synchronously. In controlling the synchronous rotation of the rotary shafts by a PLL control method, a gain-switching means device is provided to set a high gain in a PLL control circuit when the rotary shafts are accelerating or decelerating and setting a low gain therein when the rotary shafts are rotating in a steady state.
    Type: Grant
    Filed: January 29, 1993
    Date of Patent: May 24, 1994
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Yoshihiro Ikemoto, Teruo Maruyama
  • Patent number: 5150586
    Abstract: A system and process of parallel compressors for compressing fluids miscible with oil. The present invention utilizes parallel-coupled compressors, wherein each compressor comprises a crankcase chamber, discharge chamber, suction chamber, and ejector which operate independent of one another. Means are provided for coupling the ejector in the return of the lubrication pump oil within the crankcase chamber and the maintenance of that oil level in all the crankcase chambers regardless of each compressor capacity and quantity with which they are operating or are not operating. The transference of suction chamber oil to crankcase chamber is performed by the ejector via energy from the lubrication pump contained within each crankcase chamber. Further, transference of oil from suction chamber to crankcase chamber via an ejector performs all necessary equalization functions.
    Type: Grant
    Filed: November 9, 1990
    Date of Patent: September 29, 1992
    Inventor: Narcizo O. Basseggio
  • Patent number: 4756675
    Abstract: A scroll type fluid transferring machine for sucking, compressing and discharging a fluid comprises a first scroll having a first wrap plate, a second scroll having a second wrap plate which is opposed to and combined with the first scroll, a first motor having a rotary shaft which is connected to the first scroll so as to be in agreement with its center of rotation, and a second motor having a rotary shaft which is connected to the second scroll so as to be in agreement with its center of rotation.
    Type: Grant
    Filed: May 20, 1987
    Date of Patent: July 12, 1988
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Masayuki Kakuda, Etsuo Morishita
  • Patent number: 4752192
    Abstract: A rotating drum pump having a plurality of fluid driven pistons includes a pump housing with an enclosed rotating drum, and connection openings for a supplied and discharged driving fluid and for a supplied and discharged pump flow located in end walls of the housing. The drum comprises several cylinder spaces arranged axially in pairs and concentrically arranged inside the envelope surface thereof. In the cylinder spaces, which are arranged axially in pairs and are separated by a partition, there are arranged a drive piston and a pump piston interconnected by a piston rod passing in a sealed manner through the partition.
    Type: Grant
    Filed: June 12, 1987
    Date of Patent: June 21, 1988
    Assignee: AB Asea-Atom
    Inventor: Bengt Ode
  • Patent number: 4476681
    Abstract: A four piston hydraulic pump driven by a four cylinder free-piston Stirling engine has four stepped pistons operating out of phase in pairs. The hydraulic fluid pumped between the hydraulic cylinder can be tapped for hydraulic power. The stepped pistons give the option of utilizing low flow/high pressure, or high flow/low pressure. The non-utilized flow ensures that the timing between pistons will always remain correct. Since the arrangement is symmetrical, it remains balanced.
    Type: Grant
    Filed: March 2, 1982
    Date of Patent: October 16, 1984
    Assignee: Mechanical Technology Incorporated
    Inventor: John J. Dineen, deceased
  • Patent number: 4420291
    Abstract: A dynamic cooler apparatus is provided for dynamically cooling molten plastic extrudate while pumping metered amounts of that extrudate to an extrusion die or the like. The dynamic cooler apparatus utilizes bi-helical gears in a gear pump configuration in a housing in which a heat exchange medium is circulated. The heat exchange medium is also circulated internally of the gears so that the gear teeth and the housing act to cool discrete volumes of extrudate from four sides defined by the gear teeth and the internal surface of the housing. The bi-helical gears are driven to minimize loading between the teeth thereof and to permit the teeth to be as small as practical to present more cooling surface for a given cross-section of extrudate and optimize the heat transfer capability of the dynamic cooler apparatus. Provision is also made to use the molten extrudate as a lubricant for the shafts and bearings of the bi-helical gears.
    Type: Grant
    Filed: January 5, 1979
    Date of Patent: December 13, 1983
    Assignee: Maryland Cup Corporation
    Inventor: Thomas W. Winstead
  • Patent number: 4177018
    Abstract: A symmetrical, twin centrifugal pump includes a pair of valves mounted about a common shaft. The valves are capable of independent operation thus allowing either or both of the pump elements to operate. A key is also mounted to the shaft to allow overall regulation of the pump by selectively impeding the flow of liquid from the pump inlet to pump outlet.
    Type: Grant
    Filed: January 4, 1978
    Date of Patent: December 4, 1979
    Assignee: Le Material Telephonique
    Inventor: Jacques R. Granet
  • Patent number: 4127360
    Abstract: Pumping apparatus which incorporates connected piston type positive displacement, slip free pumps is disclosed. They provide pumped outputs at a common displacement rate. They run out of phase to one another so that while one is pumping, the other is able to refill. A three way valve under control of a pressure responsive switch delivers pumped fluid to the down stream outlet when a pressure match is achieved. The apparatus finds application as a constant rate continuous fluid injection pump.
    Type: Grant
    Filed: December 16, 1976
    Date of Patent: November 28, 1978
    Inventor: Clarence W. Carpenter
  • Patent number: 4084246
    Abstract: A pulse generator for producing two output pulse trains A and B where the total number of pulses in both train A and B over a fixed time period remains a constant. The two pulse trains are derived from a master clock which gates a plurality of cascade connected synchronous decade rate multipliers. A selector is set either statically or dynamically to the value N where N is the number of pulses desired in one pulse train out of every M pulses produced by the master clock. A summing means is coupled to all the multipliers to produce a first intermediate pulse train with N pulses for every M clock pulses. A difference means is coupled to each multiplier and to the master clock to produce a pulse in a second intermediate pulse train every time a clock pulse occurs and a pulse in the first pulse train does not occur. A pulse counter is coupled to each intermediate pulse train output to produce two output pulse trains A and B each having a substantially constant pulse frequency.
    Type: Grant
    Filed: February 25, 1977
    Date of Patent: April 11, 1978
    Assignee: The Perkin-Elmer Corporation
    Inventor: Arnold Schwartz
  • Patent number: 3999895
    Abstract: A positive displacement pump or motor having a plurality of cylinders in a rotatable cylinder block, the axes of the cylinders being parallel to the axis of rotation of the block, and stationary inlet and discharge ports which overlap openings in the cylinders so that port areas are constantly open to permit constant flow into the cylinders and constant flow out of the cylinders.
    Type: Grant
    Filed: May 12, 1975
    Date of Patent: December 28, 1976
    Inventor: Bede Alfred Boyle