Driven Pump Part Speed Responsive Patents (Class 417/293)
  • Patent number: 10731641
    Abstract: Illustrative embodiments of diaphragm pumps including a sensor mount are disclosed. In one illustrative embodiment, a diaphragm pump may include a shaft disposed within a pump housing and coupled to at least one diaphragm, a mount removably attached to the pump housing and having a sensor receptacle, and a proximity sensor received in the sensor receptacle of the mount such that a sensing end of the proximity sensor is flush with an end of the sensor receptacle nearest the shaft.
    Type: Grant
    Filed: March 14, 2016
    Date of Patent: August 4, 2020
    Assignee: Ingersoll-Rand Industrial U.S., Inc.
    Inventors: Dale Treml, John Conrad
  • Patent number: 9316190
    Abstract: A high-pressure fuel injection valve may include a control valve having an actuator, a high-pressure fuel connection and a low-pressure fuel connection. A control plunger and nozzle needle are aligned longitudinally in the valve stem and the valve tip. Together with the control plunger, the receiving chamber of the control plunger forms a closing control chamber delimited by the upper control plunger surface, and an opening control chamber delimited by the lower control plunger surface. Each control chamber is hydraulically connected via a feed throttle to the high-pressure fuel connection and via a return throttle to the low-pressure fuel connection. The control valve opens and closes the fuel return between the return throttles and the low-pressure fuel connection depending on the operation. The flow values of the feed throttles and of the return throttles are selected such that the high-pressure fuel injection valve opens and closes based on actuation of the control valve.
    Type: Grant
    Filed: February 17, 2011
    Date of Patent: April 19, 2016
    Assignee: CONTINENTAL AUTOMOTIVE GMBH
    Inventors: Sascha Fedrow, Janos Kerekgyarto, Anatoliy Lyubar
  • Patent number: 9316218
    Abstract: One or more techniques and/or systems are disclosed for increasing compressed air efficiency in a pump that utilizes an air efficiency device in order to optimize the amount of a compressed air in the pump. The air efficiency device may allow for controlling the operation of the air operated diaphragm pump by reducing the flow of compressed air supplied to the pump as the pump moves between first and second diaphragm positions. A sensor may be used to monitor velocity of the diaphragm assemblies. In turn, full position feedback is possible so that the pump self-adjusts to determine the optimum, or close to optimum, turndown point of the diaphragm assemblies. As such, air savings are achieved by minimizing the amount of required compressed air.
    Type: Grant
    Filed: August 8, 2014
    Date of Patent: April 19, 2016
    Assignee: Warren Rupp, Inc.
    Inventors: Mark D. McCourt, Haihong Zhu, Michael Brace Orndorff, Jevawn Sebastian Roberts, Charles Randolph Abbott
  • Patent number: 8882471
    Abstract: Methods, devices and systems capable of performing a hot restart of a compressor driven by a turbine are provided. The turbine has a high speed shaft and a low speed shaft connected to the compressor. A base slow roll speed at which a speed of the low speed shaft is in a slow roll range is maintained at the high speed shaft for a predetermined time. Then, when a vibration amplitude of the compressor is larger than a vibration limit, the maintaining is repeated. Otherwise, a set speed of the high speed shaft is increased, until a current speed of the low speed shaft reaches a minimum operating speed. If, while increasing the set speed, the vibration amplitude becomes larger than the vibration limit, the maintaining is repeated.
    Type: Grant
    Filed: July 1, 2011
    Date of Patent: November 11, 2014
    Assignee: Nuovo Pignone S.p.A.
    Inventors: Gianni Bagni, Michele Fontana, Antonio Baldassarre, Leonardo Baldassarre
  • Patent number: 8801404
    Abstract: One or more techniques and/or systems are disclosed for increasing compressed air efficiency in a pump that utilizes an air efficiency device in order to optimize the amount of a compressed air in the pump. The air efficiency device may allow for controlling the operation of the air operated diaphragm pump by reducing the flow of compressed air supplied to the pump as the pump moves between first and second diaphragm positions. A sensor may be used to monitor velocity of the diaphragm assemblies. In turn, full position feedback is possible so that the pump self-adjusts to determine the optimum, or close to optimum, turndown point of the diaphragm assemblies. As such, air savings are achieved by minimizing the amount of required compressed air.
    Type: Grant
    Filed: October 10, 2013
    Date of Patent: August 12, 2014
    Assignee: Warren Rupp, Inc.
    Inventors: Mark D. McCourt, Haihong Zhu, Michael Brace Orndorff, Jevawn Sebastian Roberts, Charles Randolph Abbott
  • Publication number: 20130336810
    Abstract: Systems and methods of the invention relate to monitoring a change in a rotational speed of a crankshaft to identify a failure related to a crankcase breather valve. A reciprocating compressor can include a detection component that is configured to track a rotational speed of a crankshaft of a compressor to identify a change in rotational speed. In an embodiment, the rotational speed can be monitored while unloaded and/or below approximiately 800 Revolutions Per Minute (RPM). Based on a change in a rotational speed of the crankshaft, a controller can be configured to communicate an alert which corresponds to a failure related to the crankcase breather valve.
    Type: Application
    Filed: August 1, 2013
    Publication date: December 19, 2013
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: BRET DWAYNE WORDEN, RICHARD C. PEOPLES, MILAN KARUNARATNE, JASON M. STRODE, JAYAPRAKASH SHREESHAILAPPA SABARAD
  • Patent number: 8608460
    Abstract: One or more techniques and/or systems are disclosed for increasing compressed air efficiency in a pump utilizes an air efficiency device in order to optimize the amount of a compressed air in a pump. The air efficiency device may allow for controlling the operation of the air operated diaphragm pump by reducing the flow of compressed air supplied to the pump as the pump moves between first and second diaphragm positions. A sensor may be used to monitor velocity of the diaphragm assemblies. In turn, full position feedback is possible so that the pump self-adjusts to determine the optimum, or close to optimum, turndown point of the diaphragm assemblies. As such, air savings is achieved by minimizing the amount of required compressed air.
    Type: Grant
    Filed: June 7, 2013
    Date of Patent: December 17, 2013
    Assignee: Warren Rupp, Inc.
    Inventors: Mark D. McCourt, Haihong Zhu, Michael Brace Orndorff, Jevawn Sebastian Roberts, Charles Randolph Abbott
  • Patent number: 8535016
    Abstract: A feedback control loop for a high pressure pump modifies the accumulator velocity and pressure during solvent transfer. The accumulator velocity is adjusted to maintain the system pressure equal to the expected pressure to thereby eliminate the effect of the flow deficit created by a thermal effect.
    Type: Grant
    Filed: July 6, 2005
    Date of Patent: September 17, 2013
    Assignee: Waters Technologies Corporation
    Inventors: Jose de Corral, Stanley P. Pensak, Jr.
  • Publication number: 20130121849
    Abstract: A hybrid vehicle includes a hybrid module, a transmission and a torque converter. The lubrication system associated with the torque converter includes an oil sump within the torque converter housing which is intended to be managed as a “dry” sump oil lubrication system. There is an oil pump in communication with the sump in order to manage the sump oil level. By monitoring an operational parameter of the oil pump motor (pressure, torque, or current) oil aeration can be detected.
    Type: Application
    Filed: January 7, 2013
    Publication date: May 16, 2013
    Inventor: Allison Transmission, Inc.
  • Publication number: 20130094974
    Abstract: A control method and apparatus for critical rotational speed avoidance in a compressor-expander set in a gas refrigeration system. By varying an opening of an antisurge or recycle valve, a shaft power used by the compressor in the compressor-expander set may be varied, thereby varying the rotational speed of the compressor-expander set to move it away from its critical speed zone. Additionally, a feedforward signal may be provided by a compressor-expander set control system to cause an antisurge valve for a recycle compressor to open upon a trip or shutdown of one compressor-expander set.
    Type: Application
    Filed: December 6, 2012
    Publication date: April 18, 2013
    Applicant: COMPRESSOR CONTROLS CORPORATION
    Inventor: COMPRESSOR CONTROLS CORPORATION
  • Patent number: 8360744
    Abstract: A control method and apparatus for critical rotational speed avoidance in a compressor-expander set in a gas refrigeration system. By varying an opening of an antisurge or recycle valve, a shaft power used by the compressor in the compressor-expander set may be varied, thereby varying the rotational speed of the compressor-expander set to move it away from its critical speed zone. Additionally, a feedforward signal may be provided by a compressor-expander set control system to cause an antisurge valve for a recycle compressor to open upon a trip or shutdown of one compressor-expander set.
    Type: Grant
    Filed: March 13, 2008
    Date of Patent: January 29, 2013
    Assignee: Compressor Controls Corporation
    Inventors: Saul Mirsky, Wayne Jacobson, David J. Hoogerwerf, Nauman Islam
  • Patent number: 8348633
    Abstract: A stability valve assembly includes a centrifugal pump and a valve downstream of the centrifugal pump. The valve includes a valve member that is movable along a valve axis within a valve body to control a fluid flow from the centrifugal pump. The valve member has a first orifice connecting a valve input to a valve chamber, and has at least one second orifice connecting a valve outlet to the valve chamber. A reference pressure upstream of the centrifugal pump applies pressure to a stepped portion of the valve member such that an amount of negative feedback provided by the valve assembly is proportional to a rotational speed of the centrifugal pump.
    Type: Grant
    Filed: December 11, 2009
    Date of Patent: January 8, 2013
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Joshua Adams, Michael F. Cass
  • Publication number: 20120027623
    Abstract: Methods, devices and systems capable of performing a hot restart of a compressor driven by a turbine are provided. The turbine has a high speed shaft and a low speed shaft connected to the compressor. A base slow roll speed at which a speed of the low speed shaft is in a slow roll range is maintained at the high speed shaft for a predetermined time. Then, when a vibration amplitude of the compressor is larger than a vibration limit, the maintaining is repeated. Otherwise, a set speed of the high speed shaft is increased, until a current speed of the low speed shaft reaches a minimum operating speed. If, while increasing the set speed, the vibration amplitude becomes larger than the vibration limit, the maintaining is repeated.
    Type: Application
    Filed: July 1, 2011
    Publication date: February 2, 2012
    Inventors: Gianni Bagni, Michele Fontana, Antonio Baldassarre, Leonardo Baldassarre
  • Publication number: 20110150671
    Abstract: A positive displacement pump is provided. The pump includes a housing, and first and second meshed rotors rotatably disposed in the housing and arranged to transform relatively low-pressure inlet port air into relatively high-pressure outlet port air. The pump additionally includes first and second meshed timing gears fixed relative to the first and second rotors, respectively, for preventing contact between the first and second rotors, and sufficiently enclosed to generate a flow of lubricating fluid. Furthermore, the blower includes an input drive adapted to be rotatably driven at speeds proportional to speeds of an internal combustion engine and arranged to drive the first and second timing gears.
    Type: Application
    Filed: December 21, 2009
    Publication date: June 23, 2011
    Applicant: Eaton Corporation
    Inventor: Daniel R. Ouwenga
  • Publication number: 20110142691
    Abstract: A stability valve assembly includes a centrifugal pump and a valve downstream of the centrifugal pump. The valve includes a valve member that is movable along a valve axis within a valve body to control a fluid flow from the centrifugal pump. The valve member has a first orifice connecting a valve input to a valve chamber, and has at least one second orifice connecting a valve outlet to the valve chamber. A reference pressure upstream of the centrifugal pump applies pressure to a stepped portion of the valve member such that an amount of negative feedback provided by the valve assembly is proportional to a rotational speed of the centrifugal pump.
    Type: Application
    Filed: December 11, 2009
    Publication date: June 16, 2011
    Inventors: Joshua Adams, Michael Cass
  • Publication number: 20110135508
    Abstract: A variable water pump control apparatus, may include a detecting portion detecting engine speed, operation of an idle stop and go system (ISG), coolant temperature, operation of a blower, and outside temperature, a variable water pump selectively circulating a coolant through an engine, and a control portion controlling the variable water pump according to the detected information including operating conditions and outside environmental factors, and a variable water pump control method may include detecting a driving condition and an environmental condition of a vehicle, and engaging or releasing a clutch of a variable water pump according to a detected condition so as to selectively circulate a coolant.
    Type: Application
    Filed: September 8, 2010
    Publication date: June 9, 2011
    Applicants: Hyundai Motor Company, Kia Motors Corporation
    Inventor: DONG WON PARK
  • Patent number: 7798282
    Abstract: A hybrid electrical power assist system (EPAS) for an automotive vehicle that utilizes the advantages of a conventional EPAS system to provide power assist based upon several distinct sensor inputs, in a heavy duty vehicle that requires significantly more assistance forces than a conventional EPAS can provide. The hybrid system utilizes a hydraulic amplifier that is connected to receive the torque output from an EPAS motor actuator and responsively provide a fluid under differential pressure through a pair of high pressure lines to a steering piston.
    Type: Grant
    Filed: March 4, 2008
    Date of Patent: September 21, 2010
    Assignee: Ford Global Technologies, LLC
    Inventor: John C. Crossman
  • Publication number: 20100189577
    Abstract: A method for increasing compressed air efficiency in a pump utilizes an air efficiency device in order to optimize the amount of a compressed air in a pump. The air efficiency device may allow for controlling the operation of the air operated diaphragm pump by reducing the flow of compressed air supplied to the pump as the pump moves between first and second diaphragm positions. A sensor may be used to monitor velocity of the diaphragm assemblies. In turn, full position feedback is possible so that the pump self adjusts to determine the optimum, or close to optimum, turndown point of the diaphragm assemblies. As such, air savings is achieved by minimizing the amount of required compressed air.
    Type: Application
    Filed: January 25, 2010
    Publication date: July 29, 2010
    Applicant: IDEX AODD, Inc.
    Inventors: Mark D. McCourt, Haihong Zhu, Michael Brace Orndorff, Jevawn Sebastian Roberts, Charles Randolph Abbott
  • Publication number: 20100028181
    Abstract: A vane pump of the intravane type for pumping hydraulic fluid, wherein each vane of the pump has two intravanes and that pressurized oil is provided to one or both intravane regions when the vane is in a rise region of the pump. The pump is operated such that the pressurized oil is provided to both undervane regions when the pump is running at low speed but the pressurized oil is provided to only one of the undervane regions when of the pump is running at high speed.
    Type: Application
    Filed: June 1, 2007
    Publication date: February 4, 2010
    Inventor: Norman Ian Mathers
  • Publication number: 20080206067
    Abstract: A feedback control loop for a high pressure pump modifies the accumulator velocity and pressure during solvent transfer. The accumulator velocity is adjusted to maintain the system pressure equal to the expected pressure to thereby eliminate the effect of the flow deficit created by a thermal effect.
    Type: Application
    Filed: July 6, 2005
    Publication date: August 28, 2008
    Applicant: Waters Investments Limited
    Inventors: Jose De Corral, Stanley P. Pensak Jr.
  • Patent number: 7033147
    Abstract: A centrifugal fluid pump assembly includes a body section and a control mechanism 6. The body section includes a housing, an impeller rotatable within the housing, and a motor for rotating the impeller. The pump assembly includes a motor current flow rate-related data storage section for storing, for a plurality of different predetermined viscosities, predetermined viscosity-related flow rate data formed from a plurality of motor current flow rate relation data at a plurality of different impeller rotational speeds at predetermined fluid viscosity, a fluid measurement data inputting section, an impeller rotational speed measurement function, a motor current measurement function, and a flow rate calculating section 58 for using a fluid viscosity value, an impeller rotational speed value, a measured motor current and data stored in the motor current flow rate-related data storage section to calculate a fluid flow rate.
    Type: Grant
    Filed: January 28, 2003
    Date of Patent: April 25, 2006
    Assignee: Terumo Kabushiki Kaisha
    Inventors: Masamichi Yanai, Mitsutoshi Yaegashi
  • Patent number: 6863505
    Abstract: This invention relates to a wind mill which is designed to convert rotational energy to mechanical energy to drive one or more pistons to raise a liquid such as water to an elevated location if necessary at a positive pressure. In addition, the present invention may be adapted to pressurize a medium, such as a gas, for storage in a reservoir.
    Type: Grant
    Filed: February 25, 2003
    Date of Patent: March 8, 2005
    Inventor: Jeremy J. Dietz
  • Publication number: 20040208754
    Abstract: An exemplary oil delivery system comprises a dual pump system configured for reducing the buildup of pressure by unloading one or both pumps, thus reducing the buildup of heat within the hydraulic system. The dual pump system is configured for delivering oil in combination to a single hydraulic system or to two completely separate hydraulic systems. In addition, the oil delivery system can also be configured to unload one or both of the pumping sections at a pre-determined speed to again limit the flow to any existing open centered hydraulic system. As a result, the oil delivery system recirculates oil back to the reservoir and/or the inlet to the pump in the absence of a buildup of pressure, and thus an absence in the buildup of heat to conserve energy.
    Type: Application
    Filed: October 1, 2002
    Publication date: October 21, 2004
    Applicant: Hydraulic Controls, Inc.
    Inventors: Dan C. McFadden, Richard K. Solomon
  • Publication number: 20040136840
    Abstract: Air-demand-controlled compressor arrangement, particularly for commercial vehicles, includes a motor unit for generating a rotating movement which, by way of an interposed rotational-speed-transmitting transmission unit, drives a compressor unit for generating compressed air from ambient air. A control unit triggers the generating of compressed air in the case of a compressed-air demand. The transmission unit is constructed in the manner of a transmission whose rotational speed can be varied, and the control unit interacts with the transmission unit in order to adapt the rotational speed of the transmission unit corresponding to the compressed-air demand.
    Type: Application
    Filed: September 2, 2003
    Publication date: July 15, 2004
    Inventors: Wolfgang Doerr, Eduard Gerum
  • Publication number: 20040101415
    Abstract: A method and a pump apparatus are provided for the generation of an adjustable, substantially constant volume flow of a fluid by means of a pump apparatus, wherein the fluid (5) is forwarded by the pump apparatus (1) from a reservoir (2) into a flow connection (4). A rotary pump (1) is used as the pump apparatus and the rotary pump (1) is operated at an efficiency which is less than half the maximum efficiency (&eegr;max) of the rotary pump (1).
    Type: Application
    Filed: November 17, 2003
    Publication date: May 27, 2004
    Applicant: Levitronix LLC
    Inventor: Reto Schoeb
  • Patent number: 6736604
    Abstract: First and second fluid pressure chambers are formed in both sides of a movement direction of a cam ring swingably placed within a pump body. A spool of a control valve is moved due to a pressure difference between the front and back of a metering orifice. Fluid pressures of the fluid pressure chambers are controlled. The cam ring is swung. Further, a solenoid for giving thrust in an axial direction thereof to the spool of the control valve and electronic control device for controlling driving of the solenoid are provided. The electronic control device has a steering sensor and determines a steering direction based on a signal from the steering sensor and also calculates a steering speed to the steering direction and controls a driving current of the solenoid in response to this steering speed and changes a discharge flow rate of a pump.
    Type: Grant
    Filed: June 11, 2002
    Date of Patent: May 18, 2004
    Assignee: Unisia JKC Steering Systems Co., Ltd.
    Inventors: Kunio Okada, Yukihisa Kosugi, Minoru Masaki, Takashi Nakamura
  • Patent number: 6602057
    Abstract: A control system is provided for load sharing between a plurality of compressors. The control system determines the actual coefficients of export flow for the compressors, compares the actual coefficients of export flow with a common or individual coefficients of export flow setpoints generated by one or more central controllers, and then generates control signals for adjusting the operating points of the compressors in order to load balance the compressors.
    Type: Grant
    Filed: October 1, 2001
    Date of Patent: August 5, 2003
    Assignee: Dresser-Rand Company
    Inventors: Amit Saxena, Michel LeDizes
  • Patent number: 6592340
    Abstract: A control system for a vacuum pump used for removing liquid from a suction washer of a pulp mill includes a pump with adjustable rotation speed and means for defining the operating point of the vacuum pump and a control/central unit wherein the performance chart of the vacuum pump is recorded and wherein the defining data of the vacuum pump operating point is fed. The control system further includes a resistance function on the suction side of the vacuum pump which depicts the suction resistance formed of at least the suction object in the suction side. The resistance function is determined by changing the rotational speed of the vacuum pump and recording the operating points in the control/central unit at various rotational speeds.
    Type: Grant
    Filed: December 11, 2000
    Date of Patent: July 15, 2003
    Assignee: Sulzer Pumpen AG
    Inventors: Kaarlo Horo, Seppo Kupiainen
  • Patent number: 6585495
    Abstract: A fluid pump is provided that produces an outflow of fluid that is not proportional to the speed of the input drive. Thus, the fluid pump can be tuned to provide a substantially constant outflow of fluid irrespective of the speed of the input drive. The fluid pump also provides fluid outflow when the rotational direction of the input drive is reversed.
    Type: Grant
    Filed: June 11, 2002
    Date of Patent: July 1, 2003
    Assignee: International Truck Intellectual Property Company, LLC
    Inventor: James A. Thomas
  • Patent number: 6531842
    Abstract: The present technique utilizes already existing components within a variable speed drive to provide harmonic filtering characteristics. Particularly, the present technique integrates transformers and inductors to provide a filter within the variable speed drive. Further, the present technique may also utilize a sine wave filter to provide additional filtering of unwanted frequencies.
    Type: Grant
    Filed: June 25, 2001
    Date of Patent: March 11, 2003
    Assignee: Schlumberger Technology Corp.
    Inventors: Kurt LeDoux, William C. Pelton
  • Publication number: 20020192081
    Abstract: First and second fluid pressure chambers are formed in both sides of a movement direction of a cam ring swingably placed within a pump body. A spool of a control valve is moved due to a pressure difference between the front and back of a metering orifice. Fluid pressures of the fluid pressure chambers are controlled. The cam ring is swung. Further, a solenoid for giving thrust in an axial direction thereof to the spool of the control valve and electronic control device for controlling driving of the solenoid are provided. The electronic control device has a steering sensor and determines a steering direction based on a signal from the steering sensor and also calculates a steering speed to the steering direction and controls a driving current of the solenoid in response to this steering speed and changes a discharge flow rate of a pump.
    Type: Application
    Filed: June 11, 2002
    Publication date: December 19, 2002
    Applicant: UNISIA JKC STEERING SYSTEMS CO., LTD
    Inventors: Kunio Okada, Yukihisa Kosugi, Minoru Masaki, Takashi Nakamura
  • Publication number: 20020182083
    Abstract: An auxiliary solenoid controlled variable displacement power steering pump, hydraulic systems incorporating same, and method for improving the efficiency of variable displacement power steering pumps. In one embodiment, a rotor is arranged within a pump body, and a cam fitted on an outer periphery of the rotor and movably arranged within the pump body to form a variable volume pump chamber. The cam is biased towards a position within the pump body to create maximum displacement. A mechanism is provided for forcing the cam into a position of fixed minimum or reduced displacement under certain conditions, such as low engine speed and power steering demand. In a preferred embodiment, the mechanism comprises a solenoid driven connecting rod that is operatively connected to the cam. Activation of the solenoid forces the cam to a position of fixed minimum or reduced displacement.
    Type: Application
    Filed: June 11, 2002
    Publication date: December 5, 2002
    Applicant: VISTEON GLOBAL TECHNOLOGIES, INC.
    Inventors: Steven Thomas Nissen, Brian Stanley Modrzejewski, Shawn Patrick Cap'Ser
  • Publication number: 20020150476
    Abstract: Fluid pump control modes in a medical perfusion system include a Back Off Response Mode, a Flow Servo Mode, a Pressure Servo Mode, and a Master-Slave Servo Mode. In the Back Off Response Mode, pump's speed is decremented to a new speed when an excessive flow rate or pressure condition is detected. The new speed is maintained until an additional decrement is required or until the Back Off Response Mode is exited. In the Flow Servo Mode, a pump's speed is controlled to maintain a fluid flow rate indicated by a user as a setpoint. In the Pressure Servo Mode, a pump's speed is controlled to maintain a pressure indicated by the user as a setpoint. In the Master-Slave Servo Mode, a slave pump receives an indication of a master pump's speed, and the slave pump speed is controlled to maintain a specified percentage of the master pump's speed.
    Type: Application
    Filed: February 21, 2002
    Publication date: October 17, 2002
    Applicant: Terumo Cardiovascular Systems Corporation
    Inventors: Lori E. Lucke, Richard M. Willems, Richard A. Griewski
  • Publication number: 20020119408
    Abstract: A fluid delivery device, in particular for the delivery of combustion air to a heating burner of a motor vehicle or for the delivery of heating medium, preferably heating air, through a heating medium duct system of a motor vehicle, comprises a delivery member which can be driven to rotate by a drive, a rotary state monitoring arrangement for monitoring the rotary state of the delivery member, and also an operating state sensing arrangement for determining the operating state of a system to be supplied with fluid by the fluid delivery device, based on the monitoring result of the rotary state monitoring arrangement.
    Type: Application
    Filed: February 24, 2002
    Publication date: August 29, 2002
    Inventors: Gunter Eberspach, Walter Blaschke, Dieter Gotz
  • Publication number: 20020098092
    Abstract: The present invention provides a vacuum pump allowing process pressure control with high responsiveness and miniaturization and cost reduction of the overall apparatus, as well as reduction of the running cost. A second pump mechanism portion is equipped on the way of an exhaust passage communicating an exhaust side out of a first pump mechanism portion with a gas outlet. The second pump mechanism portion is constructed to be capable of changing the pump speed of rotation independently of the first pump mechanism portion. When the pump speed of rotation of the second pump mechanism portion is changed, the pressure of the exhaust side out (backing pressure) of the first pump mechanism portion changes. Therefore, efficiency of gas suction from a gas inlet to the first pump mechanism portion side is increased or decreased, and the pressure in a process chamber is changed.
    Type: Application
    Filed: November 30, 2001
    Publication date: July 25, 2002
    Inventors: Yoshihiro Yamashita, Manabu Nonaka, Takashi Kabasawa
  • Publication number: 20010036413
    Abstract: An exemplary oil delivery system comprises a dual pump system configured for reducing the buildup of pressure by unloading one or both pumps, thus reducing the buildup of heat within the hydraulic system. The dual pump system is configured for delivering oil in combination to a single hydraulic system or to two completely separate hydraulic systems. In addition, the oil delivery system can also be configured to unload one or both of the pumping sections at a pre-determined speed to again limit the flow to any existing open centered hydraulic system. As a result, the oil delivery system recirculates oil back to the reservoir and/or the inlet to the pump in the absence of a buildup of pressure, and thus an absence in the buildup of heat to conserve energy.
    Type: Application
    Filed: March 28, 2001
    Publication date: November 1, 2001
    Inventors: Dan C. McFadden, Richard K. Solomon
  • Patent number: 6254767
    Abstract: A semiconductor device manufacturing apparatus. The semiconductor device manufacturing apparatus includes: a tank having an inlet and an outlet, for storing a chemical solution; a pump interposed between the inlet and outlet of the tank, for circulating the chemical solution contained in the tank; a filter interposed between the pump and the inlet of the tank; at least one main body connected to an outlet of the filter; a pumping cycle sensor for changing the pumping operation of the pump into a pulse signal; and a controller for measuring the cycle time of the pulse signals generated by the pumping cycle sensor to determine the level of deterioration of the filter.
    Type: Grant
    Filed: February 3, 2000
    Date of Patent: July 3, 2001
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Sung-ki Shin, Sang-rok Hah
  • Patent number: 5816787
    Abstract: A method and apparatus to convert the torque of a drive shaft into reciprocating energy to drive and pull a piston utilizing a nodal rotator attached to the drive shaft, or alternatively to convert reciprocating energy into torque, said rotator having compression and repositioning means associated with cam followers which drive and pull opposed pistons and cylinders in air compressors, internal combustion engines, and other technology.
    Type: Grant
    Filed: April 24, 1996
    Date of Patent: October 6, 1998
    Inventors: Robert B. Brinkerhoff, Verdon C. Brinkerhoff, deceased, by Charlene P. Brinkerhoff, executor
  • Patent number: 5779452
    Abstract: A central impeller is sandwiched between fixed walls and is driven through a circular path of small radius, but prevented from rotating by a ring-shaped shutter or slider which surrounds and guides it. The shape of the impeller and slider are such that displacement chambers are formed between them, which expand and contract as the impeller follows a circular path and imparts a reciprocating motion to the slider. The two fixed walls contain suction and discharge ports which are covered and uncovered by the impeller and the slider as they perform their motions.
    Type: Grant
    Filed: July 15, 1996
    Date of Patent: July 14, 1998
    Inventor: Alan Keith McCombie
  • Patent number: 5775883
    Abstract: A rolling-piston expander has a hermetic casing 7 provided with a suction pipe 3 and a discharge pipe 5, a cylinder 13 disposed in the casing, a roller 31 eccentrically rotated in the cylinder, an expansion chamber 39 defined by the roller and communicating with a suction port 47 and a discharge port 55, a shaft 19 for supporting the roller so that the roller may eccentrically rotate, a suction timing controller 51 consisting of the ports 47 and 51, for controlling the timing of the supply of gas into the expansion chamber, and a bypass for supplying high-pressure gas into the expansion chamber when the suction timing is off.
    Type: Grant
    Filed: August 14, 1996
    Date of Patent: July 7, 1998
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hitoshi Hattori, Masao Ozu, Kazuo Saito, Akira Morishima, Toshio Otaka, Motonori Futamura
  • Patent number: 5609475
    Abstract: A compressor with a hypotrochoidal design is constructed in such fashion that its delivery can be varied in ways other than by the drive rpm alone. A controlling edge of an inlet opening that determines the beginning of compression has a variable angular position for this purpose.
    Type: Grant
    Filed: October 24, 1995
    Date of Patent: March 11, 1997
    Assignee: Wankel Rotary GmbH
    Inventor: Dankwart Eiermann
  • Patent number: 5362209
    Abstract: An actuator for moving a solenoid armature to control fuel in response to a control current is built into a fuel pump, with trapped air in and around the actuator preventing contamination of the actuator by ferromagnetic particles in the liquid fuel from the fuel pump.
    Type: Grant
    Filed: May 23, 1991
    Date of Patent: November 8, 1994
    Assignee: AIL Corporation
    Inventor: Eric Day
  • Patent number: 5271719
    Abstract: A fluid rotating apparatus of a positive displacement pump includes a plurality of rotors accommodated in a housing, a bearing for rotatably supporting the rotors, a suction port and a discharge port formed in the housing, a suction chamber and a discharge chamber in the housing respectively communicating with the suction port and the discharge port, a plurality of motors for individually rotating the rotors, and a detecting device for detecting rotating angles and rotating numbers of the motors. In the apparatus, a fluid is sucked and discharged due to capacity change of a space defined by the rotors and the housing through synchronous control of the rotation of the plurality of motors by a signal from the detecting device. The housing has a communicating path with a flow control device to make an upstream side communicate with a downstream side of the apparatus when the rotational numbers of the rotors are less than a predetermined value.
    Type: Grant
    Filed: June 24, 1992
    Date of Patent: December 21, 1993
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Yoshikazu Abe, Teruo Maruyama, Akira Takara
  • Patent number: 5261792
    Abstract: A reverse osmosis water purification system that incorporates a high torque low speed motor to drive a pump, such that the pump can continuously pump water from a source of water to an osmotic membrane The system may have a reservoir to store the purified water as it is pumped through the osmotic filter. The system can also have a transformer and rectifier to convert and rectify an alternating electrical power source to 24 volt DC power for the motor. The transformer having a higher impedance than the motor such that the transformer acts as a current limiter in the event the motor stalls. The pump has an internal pressure relief valve Operatively connected to the inlet of the pump housing. The relief valve opens when the output pressure of the diaphragm piston reaches a predetermined valve. The relief valve allows the high pressure water to flow back into the housing inlet creating a flow loop from the inlet back to the water source.
    Type: Grant
    Filed: January 12, 1993
    Date of Patent: November 16, 1993
    Assignee: Aquatec Water Systems, Inc.
    Inventor: Ivar Schoenmeyr
  • Patent number: 5257914
    Abstract: A pump control interface for use in a diaphragm pump including at least one diaphragm adapted to move between a suction stroke and a discharge stroke during operation of the pump. A diaphragm follower is connected for movement with the diaphragm during operation of the pump. A sensor mechanism is provided for sensing at least the position and rate of movement of the diaphragm by sensing the position and rate of movement of the diaphragm follower. In one embodiment, the control interface is provided as a rod interconnecting two diaphragms of a dual diaphragm pump for synchronous movement. A plurality of conductive targets are disposed on the rod, and a proximity switch is mounted adjacent to the rod, in order to produce pulsed output signals when in proximity with the conductive targets.
    Type: Grant
    Filed: June 24, 1992
    Date of Patent: November 2, 1993
    Assignee: Warren Rupp, Inc.
    Inventor: Steven M. Reynolds
  • Patent number: 5209631
    Abstract: The invention describes an arrangement for optimum flooding of high speed vacuum pumps. The actuation of the flood valve (6) is controlled by the forces, which, among other things, are exerted upon the rotor by the flooding process. These forces are determined and used to actuate a flood valve controlling entry of the flooding gas. Such forces can be measured in active magnetically supported rotors by masuring the currents in the magnetic bearings (10 and 12). In case of hybrid bearing systems and purely mechanical bearing systems, force measurement is possible indirectly by means of measuring the distance or spacing between the rotor and the stator, or, alternatively, also by means of force sensors.
    Type: Grant
    Filed: July 11, 1991
    Date of Patent: May 11, 1993
    Assignee: Arthur Pfeiffer Vakummtechnik Wetzlar GmbH
    Inventor: Helmut Bernhardt
  • Patent number: 5127576
    Abstract: A system for controlling vehicle passenger compartment comfort. An electronic controller receives input from: (i) a thermistor array sensing blower plenum discharge temperature, (ii) a user movable Level Select Control (iii) a potentiometer sensing the position of a servo driven heater core water valve, (iv) an engine rpm tachometer generator and (v) a blower speed signal. The controller employs proportional-integral-derivative (PID) strategy in a microprocessor to generate a control signal for operating the heater core valve servo motor to maintain the plenum discharge air at a constant temperature irrespective of wide swings in engine rpm/water pump speed or user selector changes in blower speed.
    Type: Grant
    Filed: December 26, 1991
    Date of Patent: July 7, 1992
    Assignee: Eaton Corporation
    Inventors: Bruce Weatherhead, George Jarosch, Thomas Glennon
  • Patent number: 4974664
    Abstract: An automatic control system for regulating the temperature of blower air discharged over a heater core to a vehicle passenger compartment. A thermistor is disposed to sense discharge air adjacent the heater core and provide a temperature signal. An electrical indication is provided of the condition of a servomotor driven valve controlling water flow to the heater core. An electrical reference signal is provided indicative of a user selected relative change of flow discharge air temperature. A signal is provided indicating the speed of the water pump circulating liquid to the heater core. The signals are summed and the valve sums driven until the sum is zero and the valve modulated to maintain the sum at zero for regulating blower air discharge temperature constant.
    Type: Grant
    Filed: February 14, 1990
    Date of Patent: December 4, 1990
    Assignee: Eaton Corporation
    Inventors: Thomas F. Glennon, Dennis DeVera
  • Patent number: 4723895
    Abstract: A method of and an apparatus for effecting volume control suitable for use with a compressor for compressing a compressible fluid, such as a refrigerant of the refrigeration cycle, wherein a suction fluid is forcedly closed while a suction step is being performed and the fluid drawn up to then by suction into each working chamber is subjected to adiabatic expansion during the rest of the suction stroke. The fluid in the working chamber subjected to adiabatic expansion is then subjected to adiabatic compression in initial stages of a compression stroke following the suction stroke only for a period corresponding to the period of the adiabatic expansion. An on-off control valve is mounted in a fluid suction passage and operative to be brought, when it is necessary to effect volume control, to a closed position while the suction stroke is being performed, to thereby interrupt the flow of the fluid through the fluid suction passage to the working chamber.
    Type: Grant
    Filed: September 11, 1985
    Date of Patent: February 9, 1988
    Assignee: Hitachi, Ltd.
    Inventor: Isao Hayase
  • Patent number: 4714413
    Abstract: A positive displacement pump for a vehicle power steering system comprising a rotor (42) rotatable in and cooperating with a stator (20) to define a pump cavity (52), (54), inlet and outlet ports (56), (58) and (34), (36) communicating with the pump cavity and a flow control valve (96) located in the flow delivery circuit wherein provision is made for opening the flow delivery circuit to a bypass circuit (72) upon an increase in the speed of the vehicle beyond a design point thereby reducing the pump back pressure and power usage which results in increased "road feel" at increased speeds while maintaining normal power assist during steering maneuvers at low speeds.
    Type: Grant
    Filed: April 16, 1982
    Date of Patent: December 22, 1987
    Assignee: Ford Motor Company
    Inventor: James J. Duffy