Relatively Movable Pumping Members Driven By Relatively Movable Working Members Patents (Class 417/338)
- Common expansible chamber for oppositely movable working members (Class 417/340)
- Including closed fluid interconnection between working members (Class 417/342)
- Including mechanical interconnection to cause relative motion (Class 417/343)
- Position of one working member controls motive fluid valve for another (Class 417/344)
- Single member controls motive fluid for each working member (Class 417/347)
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Patent number: 11732719Abstract: 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: GrantFiled: May 29, 2017Date of Patent: August 22, 2023Assignee: S.A. Armstrong LimitedInventors: Gabor Lechner, Marcelo Javier Acosta Gonzalez, Rohit Mohindra, Santhosh Vijayan
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Patent number: 11486401Abstract: 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: GrantFiled: February 18, 2020Date of Patent: November 1, 2022Assignee: Wayne/Scott Fetzer CompanyInventor: Philip Anthony Mayleben
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Patent number: 11242851Abstract: 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: GrantFiled: November 27, 2019Date of Patent: February 8, 2022Assignee: PROJECT PHOENIX, LLCInventor: Thomas Afshari
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Patent number: 11118581Abstract: 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: GrantFiled: February 2, 2018Date of Patent: September 14, 2021Assignee: PROJECT PHOENIX, LLCInventor: Thomas Afshari
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Patent number: 10677239Abstract: 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: GrantFiled: September 21, 2018Date of Patent: June 9, 2020Assignee: Dayco IP Holdings, LLCInventors: Keith Hampton, David E. Fletcher, Brian M. Graichen, James H Miller
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Patent number: 10539134Abstract: 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: GrantFiled: October 2, 2015Date of Patent: January 21, 2020Assignee: Project Phoenix, LLCInventor: Thomas Afshari
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Patent number: 10495365Abstract: 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: GrantFiled: March 21, 2017Date of Patent: December 3, 2019Assignee: Lennox Industries Inc.Inventors: Rakesh Goel, Siddarth Rajan, Patric Ananda Balan Thobias, Abdul Rehman
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Patent number: 10174760Abstract: 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: GrantFiled: September 2, 2016Date of Patent: January 8, 2019Assignee: ROLLS-ROYCE PLCInventors: David Brookes, Martin K. Yates
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Patent number: 9989979Abstract: 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: GrantFiled: August 29, 2014Date of Patent: June 5, 2018Assignee: Team Worldwide CorporationInventors: Cheng-Chung Wang, Chien-Hua Wang
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Patent number: 9719507Abstract: 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: GrantFiled: October 30, 2013Date of Patent: August 1, 2017Assignee: Hugo Vogelsang Maschinenbau GmbHInventors: Paul Krampe, Hugo Vogelsang
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Patent number: 9217589Abstract: 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: GrantFiled: October 22, 2012Date of Patent: December 22, 2015Assignee: DANFOSS COMMERCIAL COMPRESSORSInventors: Patrice Bonnefoi, Philippe Dugast
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Patent number: 8857674Abstract: 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: GrantFiled: January 9, 2008Date of Patent: October 14, 2014Assignee: Cornelius, Inc.Inventors: Richard John Nighy, Daniel Peterson Godfrey, Lucy Ann Sheldon, Nicholas Martin Broadbent, Sam Gilbert Willis
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Patent number: 8721302Abstract: 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: GrantFiled: October 20, 2010Date of Patent: May 13, 2014Assignee: Delta Electronics, Inc.Inventors: Shun-Chen Chang, Chia-Ming Hsu, Chieh-Cheng Liu
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Publication number: 20140086761Abstract: 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: ApplicationFiled: September 23, 2013Publication date: March 27, 2014Applicant: MINEBEA CO., LTD.Inventors: Fuminori ABE, Ming Hsiang KUO
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Publication number: 20140058190Abstract: 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: ApplicationFiled: June 27, 2013Publication date: February 27, 2014Applicant: The Board of Regents of the University of Texas SystemInventors: Jeffrey R. Gohean, Thomas D. Pate, Raul G. Longoria, Richard Smalling
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Publication number: 20130294939Abstract: 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: ApplicationFiled: July 26, 2011Publication date: November 7, 2013Applicant: DRESSER-RAND COMPANYInventors: Jose L. Gilarranz, Pascal Lardy
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Publication number: 20130045117Abstract: 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: ApplicationFiled: August 10, 2012Publication date: February 21, 2013Inventor: Randell J. Wishart
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Publication number: 20120164004Abstract: 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: ApplicationFiled: August 27, 2010Publication date: June 28, 2012Inventors: Hubertus V. Thomeer, Rod Shampine
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Patent number: 8171841Abstract: 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: GrantFiled: December 29, 2006Date of Patent: May 8, 2012Assignee: 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
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Publication number: 20120087810Abstract: 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: ApplicationFiled: December 23, 2009Publication date: April 12, 2012Inventor: Jouko Tapani Peussa
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Patent number: 8147217Abstract: 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: GrantFiled: May 4, 2007Date of Patent: April 3, 2012Assignee: Siemens AktiengesellschaftInventors: Jörg Lengert, Roland Lutz, Norbert Weinberg
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Publication number: 20110070106Abstract: 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: ApplicationFiled: September 18, 2009Publication date: March 24, 2011Inventor: YU-KUNG HUANG
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Publication number: 20090123305Abstract: 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: ApplicationFiled: December 29, 2006Publication date: May 14, 2009Inventors: Kyoung-Jun Park, Ji-Young Bae, Jin-Kook Kim, Bum-Joon Kim, Hyuk Nam, Jong-Mok Lee, Jong-Hyuk Kim, Kyeong-Ho Kim
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Patent number: 7524173Abstract: 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: GrantFiled: November 1, 2007Date of Patent: April 28, 2009Assignee: EC Tool and Supply CompanyInventor: Milburn Eugene Cummins
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Publication number: 20090104052Abstract: 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: ApplicationFiled: December 29, 2008Publication date: April 23, 2009Inventors: SHAWN A. LEU, Stephen M. Moretti
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Patent number: 7354256Abstract: 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: GrantFiled: September 28, 2006Date of Patent: April 8, 2008Assignee: EC Tool and Supply CompanyInventor: Milburn Eugene Cummins
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Patent number: 6874996Abstract: 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: GrantFiled: January 13, 2003Date of Patent: April 5, 2005Assignee: Denso CorporationInventor: Shigeki Iwanami
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Patent number: 6648608Abstract: 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: GrantFiled: December 10, 2001Date of Patent: November 18, 2003Assignees: Peugeot Citroen Automobiles SA, Siemens VDO AutomotiveInventor: Jean-Marc Robert
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Patent number: 6506032Abstract: 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: GrantFiled: February 12, 2001Date of Patent: January 14, 2003Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Sadao Kawahara, Teruyuki Akazawa
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Patent number: 5839888Abstract: 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: GrantFiled: March 18, 1997Date of Patent: November 24, 1998Assignee: Geological Equipment Corp.Inventor: Curtis Harrison
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Patent number: 5314312Abstract: 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: GrantFiled: January 29, 1993Date of Patent: May 24, 1994Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Yoshihiro Ikemoto, Teruo Maruyama
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Patent number: 5150586Abstract: 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: GrantFiled: November 9, 1990Date of Patent: September 29, 1992Inventor: Narcizo O. Basseggio
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Patent number: 4756675Abstract: 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: GrantFiled: May 20, 1987Date of Patent: July 12, 1988Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Masayuki Kakuda, Etsuo Morishita
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Patent number: 4752192Abstract: 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: GrantFiled: June 12, 1987Date of Patent: June 21, 1988Assignee: AB Asea-AtomInventor: Bengt Ode
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Patent number: 4476681Abstract: 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: GrantFiled: March 2, 1982Date of Patent: October 16, 1984Assignee: Mechanical Technology IncorporatedInventor: John J. Dineen, deceased
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Patent number: 4420291Abstract: 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: GrantFiled: January 5, 1979Date of Patent: December 13, 1983Assignee: Maryland Cup CorporationInventor: Thomas W. Winstead
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Patent number: 4177018Abstract: 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: GrantFiled: January 4, 1978Date of Patent: December 4, 1979Assignee: Le Material TelephoniqueInventor: Jacques R. Granet
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Patent number: 4127360Abstract: 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: GrantFiled: December 16, 1976Date of Patent: November 28, 1978Inventor: Clarence W. Carpenter
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Patent number: 4084246Abstract: 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: GrantFiled: February 25, 1977Date of Patent: April 11, 1978Assignee: The Perkin-Elmer CorporationInventor: Arnold Schwartz
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Patent number: 3999895Abstract: 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: GrantFiled: May 12, 1975Date of Patent: December 28, 1976Inventor: Bede Alfred Boyle