External Condition Responsive Pumped Fluid Control Patents (Class 417/278)
  • Patent number: 11428196
    Abstract: A fuel system for an internal combustion engine includes an actuation train having a cam follower, a pushrod, a rocker arm, and a camshaft having a cam lobe rotatable in contact with the cam follower according to an ascending ramp phasing, a peak phasing, and a descending ramp phasing. The fuel system further includes a fuel injector including an electrically actuated spill valve. A fueling control unit is in communication with the spill valve and structured to close the spill valve during the ascending ramp phasing, such that a plunger cavity pressure is increased to oppose a plunger-advancement inertia of the actuation train. Related methodology and control logic is also disclosed.
    Type: Grant
    Filed: November 30, 2021
    Date of Patent: August 30, 2022
    Assignee: Caterpillar Inc.
    Inventors: Kevin J Schreader, Victor I Yacoub, Satya Naga Deepak Pillarisetti, Bradley D. Ferguson
  • Patent number: 10865785
    Abstract: A gas transportation device includes a gas outlet cover, plural flow-guiding pedestals and plural gas pumps. The gas outlet cover includes a gas outlet nozzle and a gas outlet cavity. The gas outlet nozzle and the gas outlet cavity are in communication with each other. Each flow-guiding pedestal includes a main plate, a protruding frame and a chamber frame. The main plate includes a recess and a communicating aperture in communication with the recess. The gas pumps are disposed inside the chamber frames of the flow-guiding pedestals, respectively. The gas outlet cover covers the flow-guiding pedestals and is connected to the protruding frames, whereby plural convergence chambers are defined and are in communication with the gas outlet cavity. Consequently, the gas is transported through the recesses, the communicating apertures, the convergence chambers and the gas outlet cavity sequentially, and finally is discharged out from the gas outlet nozzle.
    Type: Grant
    Filed: September 7, 2018
    Date of Patent: December 15, 2020
    Assignee: MICROJET TECHNOLOGY CO., LTD.
    Inventors: Hao-Jan Mou, Shih-Chang Chen, Jia-Yu Liao, Hung-Hsin Liao, Chi-Feng Huang, Chang-Yen Tsai
  • Patent number: 9738138
    Abstract: A vehicle air conditioner with a refrigerant circuit has as components at least one evaporator, a refrigerant compressor, a refrigerant condenser, an expansion valve associated with the evaporator and at least one heat exchanger with an associated expansion valve for coupling with a coolant circuit of a heat source, wherein the components are connected by a refrigerant line. A refrigerant container is provided which is connected on the high-pressure side of the refrigerant compressor with the refrigerant line and has a refrigerant-receiving chamber with a controllable volume, and a control unit is provided with which the volume of the chamber of the refrigerant container is controlled as a function of operating parameters of the refrigerant circuit. Alternatively, the refrigerant container is connected on the high-pressure side of the refrigerant compressor with the refrigerant line by way of a branch line.
    Type: Grant
    Filed: March 13, 2015
    Date of Patent: August 22, 2017
    Assignee: AUDI AG
    Inventors: Christian Rebinger, Dirk Schroeder, Klaus Strasser, Ruben Gonzalez
  • Patent number: 8850903
    Abstract: A liquid aspirating and dispensing apparatus and method of using the apparatus. Among other elements, the apparatus includes a liquid handling device having one or more channel members, each of which has a removable liquid holding tip attached, and a signal transmitting device. A signal transmitted from the signal transmitting device may be used in a variety of ways to yield information regarding the performance of the apparatus. This information may be provided via direct detection of the signal by an operator of the apparatus. Alternatively, the signal may be detected by a programmable signal detecting device, interpreted by the apparatus, and then displayed in a form that is understandable to the operator. Furthermore, the liquid holding tip may be modified to enable different forms of signal transmission.
    Type: Grant
    Filed: January 13, 2011
    Date of Patent: October 7, 2014
    Assignees: Artel, Inc., Seyonic S.A.
    Inventors: Richard H. Curtis, Kirby Pilcher, David L. Bohnsack, Charles Ewing, George Rodrigues, John T. Bradshaw, Marc Boillat
  • Patent number: 8777585
    Abstract: An electric compressor 10 includes a compression mechanism 11, an electric motor 12 driving the compression mechanism 11, and a control portion 13 controlling to drive the electric motor 12, incorporated into a single casing, and further includes a temperature detector 14 detecting a temperature of one or more components constituting one or both of the control portion 13 and the electric motor 12, and a current detector 15 detecting a current flowing through the component. When the temperature detected by the temperature detector 14 is a temperature Td, the current detected by the current detector 15 is a current Id, and a current corresponding to the temperature Td at a temperature characteristic relating to the current specific to the component is a current Ia(Td), the control portion 13 stops driving the electric motor 12 on the basis of a result of comparison between Ia(Td) and Id.
    Type: Grant
    Filed: June 24, 2008
    Date of Patent: July 15, 2014
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Koji Nakano, Takashi Nakagami, Hideto Noyama, Masahiko Asai, Makoto Hattori, Takayuki Takashige
  • Patent number: 8764407
    Abstract: A fluid level control mechanism comprising a reservoir assembly, a flow line assembly, and a resilient force assembly. The flow line assembly has a main flow line capable of passing a fluid, a diverter flow line, and a diverter valve. The diverter valve is connected to a lower end plate of the reservoir assembly via a lever arm, such that the reservoir assembly is capable of sliding along the length of the main flow line in response to a fluid level. Downward movement of the reservoir assembly opens the diverter valve and upward movement of the reservoir assembly closes the diverter valve. The resilient force assembly is attached to the main flow line and the reservoir assembly and is capable of exerting a vertical force against the reservoir assembly to close the diverter valve.
    Type: Grant
    Filed: May 23, 2012
    Date of Patent: July 1, 2014
    Inventor: William K. Filippi
  • Patent number: 8764406
    Abstract: A fluid level control mechanism comprising a float assembly, a flow line assembly, an upper centralizer, and a lower centralizer. The float assembly has a cylindrical outer float tube and a cylindrical inner float tube connected by upper and lower end plates to form a sealed cavity. The flow line assembly has a main flow line capable of passing a fluid, a diverter flow line, and a diverter valve. The diverter valve is connected to the lower end plate of the float assembly via a lever arm, such that the float assembly is capable of sliding along the length of the main flow line in response to a fluid level. Downward movement of the float assembly opens the diverter valve and upward movement of the float assembly closes the diverter valve. The upper and lower centralizers center the mechanism within a well bore.
    Type: Grant
    Filed: September 30, 2011
    Date of Patent: July 1, 2014
    Inventor: William K. Filippi
  • Publication number: 20140000866
    Abstract: A pumping assembly includes a hydraulic pump having a hydraulic ram tied to a reciprocating annular piston having a central bore. When the annular piston moves in an upward direction, the hydraulic ram moves toward an extended position extending from the housing. When the annular piston moves in a downward direction, the hydraulic ram moves toward a retracted position retracted within the housing. A polish rod extends up through the central bore of the annular piston and is held in position by a polish rod clamp positioned on top of the hydraulic ram. The polish rod moves with the hydraulic ram. Other pumping systems, devices, and methods are also disclosed.
    Type: Application
    Filed: September 2, 2013
    Publication date: January 2, 2014
    Applicant: 1238585 ALBERTA LTD.
    Inventor: Perry L. St. Denis
  • Publication number: 20130129528
    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: January 17, 2013
    Publication date: May 23, 2013
    Applicant: COMPRESSOR CONTROLS CORPORATION
    Inventor: Compressor Controls Corporation
  • Patent number: 8434315
    Abstract: A compressor drive torque estimating device to be adapted for a system provided with a refrigeration cycle in which a refrigerant is circulated by a compressor driven by a drive source mounted in a vehicle, comprising heat load detecting means for detecting a heat load of the refrigeration cycle, a storage unit storing a plurality of estimated drive torque characteristics establishing correlation between a drive torque change characteristic of the compressor and an elapsed time from a time of start of operation of the compressor, an estimated drive torque characteristic selecting means for selecting the one of the plurality of estimated drive torque characteristics stored in the storage unit based on detected values detected by the heat load detecting means, and an estimated drive torque calculating means for calculating an estimated drive torque of the compressor based on the estimated drive torque characteristic selected by the estimated drive torque characteristic selecting means.
    Type: Grant
    Filed: May 21, 2008
    Date of Patent: May 7, 2013
    Assignee: Denso Corporation
    Inventors: Yoshikatsu Sawada, Yasutane Hijikata
  • Patent number: 8366406
    Abstract: A multi-stage compressor is provided that reliably prevents liquid compression in a higher stage compression mechanism and also prevents compression efficiency degradation resulting from overheating of injection refrigerant and from the lubricating oil being raised up together with the injection refrigerant. An injection circuit is branched into a plurality of circuits. A first circuit thereof is communicatively connected to an inside space of a closed housing that is at the same side as the higher stage compression mechanism with respect to an electric motor, and a second circuit is communicatively connected to an inside space of the closed housing that is opposite from the higher stage compression mechanism with respect to the electric motor. The first circuit and the second circuit are provided with a switching mechanism for switching the injection circuit to the first circuit or the second circuit according to the dryness of the injection refrigerant.
    Type: Grant
    Filed: July 24, 2008
    Date of Patent: February 5, 2013
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Hajime Sato, Yoshiyuki Kimata
  • Patent number: 8354807
    Abstract: An anti-noise method for the Direct Current Brushless motor System, which includes a startup circuit, phase detective circuit, motor phase commutation circuit, driving circuit, BEMF detective circuit, and frequency detector, utilizes the BEMF detective circuit to detect the BEMF induced from the coils of the outer motor, and utilizes the sampled voltage phase to determine rotation speed and phase of the external motor by the phase detection circuit and frequency detector. Further, the sampling voltage of the BEMF detection circuit is feedback controlled by the frequency detector, utilized to keep good BEMF to noise ratio, and avoids the BEMF sampling error from the system.
    Type: Grant
    Filed: December 14, 2010
    Date of Patent: January 15, 2013
    Assignee: Amtek Semiconductor Co., Ltd.
    Inventors: Teng-Hui Lee, Chan-Chih Liu
  • Patent number: 8246318
    Abstract: Provided is a water-cooled air compressor which is capable of restraining lowering of the performance of a plate type compressor for heat-exchanging compressed air from a compressor body, with cooling water due to clogging of gaps between plates in the heat-exchanger by dust or the like, incorporating a first solenoid valve and a second solenoid valve connected respectively in a cooling water supply pipe line and a cooling water discharge pipe line of the heat-exchanger, an air feed pipe line connecting between a compressed air supply pipe line on the outlet side of the heat-exchanger and the cooling water discharge pipe line, a third solenoid valve and a check valve connected in the air feed pipe line, a discharge pipe line connected in a discharge pipe line 18 so as to branch therefrom, a fourth solenoid valve connected in the discharge pipe line, and a control device for controlling opening and closing of the first to fourth solenoid valves.
    Type: Grant
    Filed: June 19, 2008
    Date of Patent: August 21, 2012
    Assignee: Hitachi Industrial Equipment Systems Co., Ltd.
    Inventors: Hideharu Tanaka, Masahiko Takano, Akihiro Nagasaka
  • Patent number: 8241009
    Abstract: The present invention relates to a system for reusing water, comprising: —a mains system which comprises at least one conduit for transporting water and monitoring means adapted to measure changes in an electrical parameter of the conduit; —a storage tank for storing supplied water; —a water discharge for discharging stored water to a water-consuming unit; and—a control system adapted to control the supply of water to and the discharge of water from the storage tank subject to the changes in the parameter measured by the monitoring means. The present invention also relates to a mains system applied in such a system, and to a method for monitoring such a system or water mains system.
    Type: Grant
    Filed: March 2, 2007
    Date of Patent: August 14, 2012
    Assignee: Ecoplay International B.V.
    Inventors: Johannes Donaes Jacobus Platteel, Sjoerd Pieter Wouda
  • Patent number: 8234875
    Abstract: A fuel system for a turbine engine is provided. The fuel system includes a positive displacement pump driven by an electric motor. The pump is rotated in a first direction to deliver fuel to the turbine engine, and a second direction for evacuating fuel from the turbine engine. A shut-off check valve is open in a first direction in response to a first differential pressure created by the pump in the first direction. The shut-off check valve is biased to a closed position when the pump is rotating in the second direction. An ecology check valve is biased to a closed position in the first direction and open in the second direction in response to a second differential pressure created by the pump. The check valves open and close automatically in response to the pressures generated by the positive displacement pump in each of the first and second rotational directions. In this manner, simple, reliable valves are utilized to regulate the flow of fuel in the fuel system.
    Type: Grant
    Filed: August 5, 2011
    Date of Patent: August 7, 2012
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Charles H. Falke, Leo J. Veilleux, Douglas A. Parsons
  • Patent number: 8226378
    Abstract: Device to prevent the formation of condensate in compressed gas coming from an oil-injected compressor element which is connected to an oil separator which is connected to the compressor element by an injection pipe, and wherein a cooler is provided in the injection pipe which can be bridged by means of a bypass. A controlled mixing valve is connected to the injection pipe and to the bypass, and a control device controls the mixing valve to adjust the compressed air temperature by adjusting the flow distribution through the mixing valve.
    Type: Grant
    Filed: October 16, 2006
    Date of Patent: July 24, 2012
    Assignee: Atlas Copco Airpower, Naamloze Vennootschap
    Inventors: Ivo Daniëls, Tom Maria Albert De Letter
  • Patent number: 8167581
    Abstract: A device for delivering a liquid including a pump, and an anti-siphon valve external to the pump is disclosed. The anti-siphon valve includes an inlet channel connected to the outlet duct of the pump, and an outlet channel, between which a seat and a moving member are disposed that are suitable for co-operating together and that define, between the inlet channel and the outlet channel, a leaktight liquid flow zone. The moving member is suitable for going from an opening position making it possible for liquid to flow through the flow zone, to a closure position in which the moving member comes into contact with the seat of the valve and prevents any flow through the flow zone, the moving member being subjected to the pressure of a reference chamber that is not in fluid communication with the outlet channel.
    Type: Grant
    Filed: September 3, 2007
    Date of Patent: May 1, 2012
    Assignee: Debiotech SA
    Inventors: Niklaus Schneeberger, Véronique Vallet, Eric Chappel
  • Publication number: 20110231047
    Abstract: A vehicle includes an air compressor system for supplying compressed air to an air consuming circuit, wherein the vehicle includes an arrangement for determining that the vehicle is coasting. The compressor system is controllable to deliver compressed air at a first power rate and at least at a second higher power rate, and it is controlled to deliver compressed air at the second higher power rate when it is determined that the vehicle is coasting. A method for operating an air compressor system for such a vehicle is also provided.
    Type: Application
    Filed: November 28, 2008
    Publication date: September 22, 2011
    Applicant: RENAULT TRUCKS
    Inventors: Luc Aixala, Christophe Long, Philippe Le Brusq
  • Publication number: 20110182755
    Abstract: A system for raising water from an underground source of water to an aboveground tank includes a plurality of capillary tubes for raising water from the underground source to a first water level, a pipe for raising water from the first water level to an above ground tank, the aboveground tank is painted black to absorb the sun's rays and is tilted with an elevated proximal end so that water in the tank runs down to its distal end. A tap is provided in the distal end for drawing water out of the tank. The tank also includes two one way valves, one in an upper portion of the distal end for allowing heated air to escape and one in a lower portion of the distal end to allow water to be drawn up into the tank as heated air cools. A solar powered rechargeable battery can be used to power a positive displacement pump.
    Type: Application
    Filed: January 27, 2010
    Publication date: July 28, 2011
    Inventor: Mohammad A. Abdullah
  • Patent number: 7878770
    Abstract: A hydraulic circuit for actuating an electromagnetic proportional pressure reducing valve by a command current outputted from a controller based on an operation amount of a remote control valve, and by a secondary pressure of the pressure reducing valve, actuating a common bleed-off valve which is a hydraulic pilot type spool valve is provided. In the controller, as a correction processing for correcting characteristics of a proportional valve command value which is a current value given to the pressure reducing valve and the opening area of the spool valve, at an inflection point at which the degree of change of a pump pressure increases, an actual proportional valve command value at a time of obtaining the pump pressure is compared to a theoretical proportional valve command value of a case of no tolerance, and a correction to compensate for a difference between the both command values is performed.
    Type: Grant
    Filed: February 26, 2007
    Date of Patent: February 1, 2011
    Assignee: Kobelco Construction Machinery Co., Ltd.
    Inventor: Hidekazu Oka
  • Patent number: 7871248
    Abstract: A system for controlling lubricant displacement from a machine during turbomachine shutdown sequence includes a motor, a pump, a control valve, and a motor control unit. The motor is selectively energized from a power bus to rotate at a rotational speed and supply a drive force to the pump. The pump, in response to the drive force, draws fluid from a fluid and supplies the fluid to the machine. The control valve is movable between at least a first position, in which the control valve fluidly communicates the pump with a lubrication fluid source, and a second position, in which the control valve fluidly communicates the pump with a gaseous fluid source. During the shutdown sequence, the motor control unit controllably energizes the motor from the power bus to thereby control its rotational speed in accordance with a schedule that will displace at least a substantial volume of lubricant in the rotating machine with fluid from the gaseous fluid source.
    Type: Grant
    Filed: February 20, 2007
    Date of Patent: January 18, 2011
    Assignee: Honeywell International Inc.
    Inventor: Jim E. Delaloye
  • Publication number: 20100242431
    Abstract: A pump arrangement and method of regulating pressure of a pump arrangement are provided. The pump arrangement includes an actuation pump, a pressure regulating valve, and a control valve. The actuation pump has an actuation pump outlet providing an actuation pump discharge flow. The actuation pump discharge flow is piped to opposite sides of a regulator valve member that selectively adjusts an amount of fluid that is bled from the actuation pump outlet such that the actuation pump outlet pressure is used to regulate the actuation pump discharge pressure. The actuation pump discharge flow is separated into first and second portions to provide opposing forces on the regulator valve member. The control valve is operably interposed between the actuation pump outlet and the valve member to selectively adjusts the amount of biasing applied by the second portion of the actuation pump discharge flow on the regulator valve member.
    Type: Application
    Filed: March 25, 2009
    Publication date: September 30, 2010
    Applicant: WOODWARD GOVERNOR COMPANY
    Inventor: Carthel C. Baker
  • Publication number: 20100068077
    Abstract: A combined debris catcher and pressure relief valve positionable between first and second ports of an inlet arrangement that is upstream of the main body of a vacuum pump. The debris catcher includes an open ended tube that is spring biased upwardly and in normal operation forms a seal with the inlet arrangement. In the raised or sealed position, incoming fluid from the system to be evacuated travels along a closed flow path through the first port of the inlet arrangement, through the debris catcher, and out through the second port of the inlet arrangement into the main body of the vacuum pump. If the inlet arrangement is hooked up initially or at any time to a system that is above atmospheric pressure, the above atmospheric pressure will overcome the upward force of the spring on the tube and cause the tube to move to an open position spaced from the inlet arrangement harmlessly venting the high pressure fluid to ambient air and avoiding potential damage or contamination to the pump.
    Type: Application
    Filed: September 11, 2009
    Publication date: March 18, 2010
    Inventor: Gregory S. Sundheim
  • Patent number: 7648343
    Abstract: A method allows for controlling the amount of electric current from an electrical circuit used by an electric motor in an electric motor driven reciprocating air compressor unit. A piston is reciprocated with a portable electric motor while air is channeled through an inlet into a compression cylinder, allowing the piston to draw on compressed amounts of air during each reciprocation. A valve mechanism is mounted to the inlet and is adjustable to a plurality of positions, each position allowing for one of a plurality of predeterminable amounts of air to be permitted to be drawn into the compression cylinder and compressed. The valve mechanism is manually adjusted to control the amount of air drawn into the compression cylinder and compressed by the piston to control the amount of electric current used by the electric motor.
    Type: Grant
    Filed: October 12, 2006
    Date of Patent: January 19, 2010
    Inventor: James P. Cornwell
  • Patent number: 7594801
    Abstract: The amount of chemical liquids dispensed by a chemical liquid supply apparatus is stabilized and dispensing accuracy is remarkably improved. A pump discharges a liquid accommodated in a liquid tank. A filter is connected to the pump through a pump outlet flow path to which a pump discharge-side valve for opening/closing the flow path is provided. A dispensing nozzle (liquid dispense portion) is connected to the filter through a liquid discharge flow path to which a discharge valve for opening/closing the flow path is provided. A vacuum source communicates with the filter through an exhaust flow path to which a deaeration valve for opening/closing the flow path is provided.
    Type: Grant
    Filed: December 6, 2002
    Date of Patent: September 29, 2009
    Assignee: Koganei Corporation
    Inventor: Seiichiro Udagawa
  • Patent number: 7536967
    Abstract: A marine water conversion apparatus capable of pumping ocean surface water several hundred feel below the surface to cause sufficient cooler water to rise to the surface to prevent formation of or to moderate hurricanes. The apparatus is remotely controlled and includes a propulsion system for moving it to a new location or in predetermined patterns through use of a global positioning system and computerized controls. Power for driving the pumps may be provided by a wind turbine driven electric generator at the upper end of an upper tube section pivotally connected to a float tank on a vertical axis.
    Type: Grant
    Filed: January 30, 2006
    Date of Patent: May 26, 2009
    Inventor: Gerald L. Barber
  • Patent number: 7497668
    Abstract: A method for operating a gas-supply system, particularly for a gas turbine, having a gas-carrying pipeline, a controllable compressor arranged in the pipeline and at least one consumer connected to the pipeline and located downstream from the compressor. The compressor is regulated as a function of a comparison between the setpoint discharge pressure of the compressor and the actual discharge pressure of the compressor. The energy consumption of the compressor can be reduced in that the setpoint discharge pressure of the compressor is determined as a function of a setpoint admission pressure of the consumer.
    Type: Grant
    Filed: September 8, 2005
    Date of Patent: March 3, 2009
    Assignee: Alstom Technology Limited
    Inventors: Andreas Brautsch, George Mitsis, Patrick Queloz, Floris Van Straaten
  • Publication number: 20080286126
    Abstract: A lightweight, inexpensive, corrosion proof, utility pump having a flexible member forming a sliding interference fit with a pump rod with the flexible member confined between a pump rod bushing and an end cap to prevent leakage and a method of converting an inexpensive utility pump from a leaking condition to a non leaking condition without having to modify the existing components of the utility pump.
    Type: Application
    Filed: May 14, 2007
    Publication date: November 20, 2008
    Inventors: Aaron L. Eaton, Lloyd Herbert King, JR.
  • Patent number: 6948914
    Abstract: The metering pump comprises a synchronous motor which is stepped down via a mechanical gear and the rotation movement of the motor is converted into a stroke movement which drives the membrane pump. To the motor there is allocated an electronic control which may be activated by external impulses with regard to the delivery quantity. At the same time the control operates such that one always passes through a complete operating cycle of the pump if the nominal delivery quantity resulting on account of the received impulses is as large or larger than the quantity which the pump delivers in an operating cycle.
    Type: Grant
    Filed: July 13, 2001
    Date of Patent: September 27, 2005
    Assignee: Grundfos A/S
    Inventors: Bo Kragelund, Michael Christian Byskov, Hans Henrik Jochumsen
  • Patent number: 6935847
    Abstract: A pump assembly for a penile implant is provided having a mechanism which prevents spontaneous inflation of the cylinders implanted within the user. The preventative mechanism uses overpressure generated by the reservoir during unintentional compression to effectively seal the pump assembly from unintended fluid flow. The prevention mechanism itself creates all necessary forces to prevent the undesired fluid flow to the cylinders. This is accomplished by incorporating appropriate mechanisms within the pump itself.
    Type: Grant
    Filed: December 6, 2002
    Date of Patent: August 30, 2005
    Assignee: AMS Research Corporation
    Inventors: Charles C. Kuyava, John W. Westrum, Jr., David W. Clark
  • Patent number: 6817842
    Abstract: In a delivery conduit for a compressor or an aspiration conduit for an aspirator, which connects the compressor or the aspirator to a closed environment, a first valve is inserted, and opening and a closing of which is commanded by atemperature of an external environment. The valve is normally closed for external temperatures which are lower than a predetermined level and open, placing the conduit in communication with the outside environment, when the external temperature exceeds the predetermined level.
    Type: Grant
    Filed: May 30, 2002
    Date of Patent: November 16, 2004
    Assignee: ESAM S.p.A.
    Inventor: Ennio Cattani
  • Publication number: 20040184928
    Abstract: A compressor assembly includes a compressor, a controller, a gateway and a system controller. The controller includes a vibration sensor and monitors operational characteristics of the compressor. The gateway is in communication with the controller, the system controller is in communication with the controller through the gateway.
    Type: Application
    Filed: January 30, 2004
    Publication date: September 23, 2004
    Inventors: Hank E. Millet, Natarajan Rajendran, William W. McCroskey
  • Publication number: 20040136838
    Abstract: A pressure regulator for an oil pump of a motor vehicle comprises a plunger and a coil. The plunger is normally disposed to cover a flow release chamber, and the coil is energizable to move the plunger to uncover the flow release chamber.
    Type: Application
    Filed: January 10, 2003
    Publication date: July 15, 2004
    Inventors: William F. Resh, Wei Tao
  • Publication number: 20040091371
    Abstract: A device for pumping a pulp suspension and simultaneous abduction of gas from the suspension. The device comprises at least one pulp pump (1) with a housing (2) with inlet (3) and, respectively. outlet (4) for the suspension and an outlet (5) for gas. The gas outlet (5) is connected via a pipe (7) to at least one external vacuum pump (8). The pipe (7) is formed with a substantially vertical portion, the highest point of which is located on a level above the pulp pump (1). A means (10) for the supply of flushing water to the pipe (7) is connected upwardlly in the vertical portion of the pipe (7).
    Type: Application
    Filed: September 22, 2003
    Publication date: May 13, 2004
    Inventor: Peter Danielsson
  • Patent number: 6688851
    Abstract: This invention provides the use of a pump to regulate torque in a planetary gear system. The pump is provided with a moveable piston as an end plate. An actuator, attached to the piston, controls the movement of the piston. In one position, the piston is in contact with the internal components of the pump. When the actuator moves the piston, the piston loses contact with the pump, thus allowing a free flow of fluid between the inlet and outlet of the pump. In this configuration, the pump is no longer able to generate the pressure that creates torque in the planetary gear system.
    Type: Grant
    Filed: December 28, 2001
    Date of Patent: February 10, 2004
    Assignee: Visteon Global Technologies, Inc.
    Inventors: Perry Edward Phelan, Joseph Palazzolo
  • Patent number: 6497556
    Abstract: A fluid level controlled pumping system includes a pumping unit disposed within a fluid cavity. The pumping unit includes an inlet operable to receive a fluid to be pumped from the fluid cavity. The system also includes a valve slidably coupled to the pumping unit. The valve includes a passage for receiving pumped fluid from an outlet of the pumping unit. In response to a decreasing fluid level within the fluid cavity, movement of the valve relative to the pumping unit aligns the passage with a port of the pumping unit to recirculate the pumped fluid from the outlet to the inlet.
    Type: Grant
    Filed: April 24, 2001
    Date of Patent: December 24, 2002
    Assignee: CDX Gas, LLC
    Inventors: Joseph A. Zupanick, Monty H. Rial
  • Publication number: 20020155003
    Abstract: A fluid level controlled pumping system includes a pumping unit disposed within a fluid cavity. The pumping unit includes an inlet operable to receive a fluid to be pumped from the fluid cavity. The system also includes a valve slidably coupled to the pumping unit. The valve includes a passage for receiving pumped fluid from an outlet of the pumping unit. In response to a decreasing fluid level within the fluid cavity, movement of the valve relative to the pumping unit aligns the passage with a port of the pumping unit to recirculate the pumped fluid from the outlet to the inlet.
    Type: Application
    Filed: April 24, 2001
    Publication date: October 24, 2002
    Applicant: CDX Gas, LLC
    Inventors: Joseph A. Zupanick, Monty H. Rial
  • Patent number: 6126405
    Abstract: A compressor has a drive plate located in a crank chamber and tiltably mounted on a drive shaft and a piston operably coupled to the drive plate and located in a cylinder bore. The inclination of the drive plate is variable according to a difference between the pressure in the crank chamber and the pressure in the cylinder bore. The compressor has an adjusting mechanism for adjusting the pressure in one of the crank chamber and a suction chamber to vary the difference between the pressure in the crank chamber and the pressure in the cylinder bore. The adjusting mechanism includes a gas passage for passing the gas used for adjusting the pressure and a control valve for adjusting the amount of the gas flowing in the gas passage. The control valve includes a valve body, a reacting member and a solenoid. The valve body adjusts the opening size of the gas passage. The reacting member moves the valve body in accordance with the pressure of the gas supplied to the compressor from the external circuit.
    Type: Grant
    Filed: June 16, 1997
    Date of Patent: October 3, 2000
    Assignee: Kabushiki Kaisha Toyoda Jidoshokki Seisakusho
    Inventors: Masahiro Kawaguchi, Masanori Sonobe, Hiroshi Kubo, Tetsuhiko Fukanuma
  • Patent number: 5538397
    Abstract: A fuel injection pump has a pump plunger (13), which is driven by a drive shaft (15) via a cam gear (14) at least in an axial stroke movement and in so doing generates a fuel injection pressure in a pump work space (16), and a magnet valve (30) blocking or releasing the pump work space (16) relative to a relief duct (26). The start of delivery of the pump plunger is determined by the closing of the relief duct (26) and the end of delivery of the pump plunger (13) is determined by the release of the relief duct (26). To prevent the so-called jumping off of the plunger in the cam gear (14), the magnet valve (30) is controlled after the end of delivery in such a way that a residual pressure lying below the injection pressure is built up in the pump work space (16) until the top dead center point is reached (FIG. 1).
    Type: Grant
    Filed: September 23, 1993
    Date of Patent: July 23, 1996
    Assignee: Robert Bosch GmbH
    Inventors: Helmut Laufer, Anton Karle
  • Patent number: 5518373
    Abstract: A compressor start-up controller includes a compressing section (37-39) for compressing a refrigerant; a motor (25) connected to the compressing section for rotating the compressing section; a drive circuit (10) connected to the motor for driving the motor; a rotation detecting device (1) connected to the drive circuit for detecting whether the motor is normally rotating; a control unit (8) connected to the drive circuit for operating the motor in a step mode at a very slow rotation at its start-up for effecting electricity conducting control to gradually increase or decrease commutating current at a very slow speed during the step mode operation at the motor start-up.
    Type: Grant
    Filed: February 16, 1994
    Date of Patent: May 21, 1996
    Assignees: Zexel Corporation, Epson Corporation
    Inventors: Nobukazu Takagi, Kiyohiro Harada, Sakae Mashio, Akihito Uetake, Osamu Shinkawa, Takeshi Fujihisa
  • Patent number: 5484162
    Abstract: A vehicle height control system including a shock absorber having an air chamber, an air compressor connected with the shock absorber through an air supply conduit, an air drain conduit connected the air supply conduit, an air drain valve in the air drain conduit and which is opened so as to discharge to the atmosphere, air stored in the air chamber and the air supply conduit, a cut-off valve disposed between the shock absorber and the air compressor in the supply conduit and which is closed so as to store the air in the air chamber, and a controller which controls an operation of the air compressor, the air drain valve and the cut-off valve so as to control the amount of air stored in the air chamber, wherein the air drain valve remains opened for a predetermined time during which operation of the air compressor is started and the cut-off vale is opened after the air compressor is started.
    Type: Grant
    Filed: February 1, 1994
    Date of Patent: January 16, 1996
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventors: Yoshiaki Kanoh, Yoshikazu Tachiiri, Kazuo Ogawa
  • Patent number: 5433590
    Abstract: In a cooling device for a rotary piston compressor, in particular a screw-type compressor, which is part of a refrigerant circuit together with a condenser and an evaporator, coolant of the refrigeration system and oil serving to lubricate bearings as well as to cool and seal the screw-type compressor are injected into the screw-type compressor. In order to cool the oil serving to lubricate the compressor bearings separately and to thereby achieve a more economical functioning of the entire cooling device, it is suggested that only the part of the oil serving to lubricate the bearings of the compressor is cooled as a function of the oil temperature sensed behind the bearings and that a branched stream of coolant is used for this, the stream on its part subsequently being fed to the compressor again.
    Type: Grant
    Filed: December 21, 1993
    Date of Patent: July 18, 1995
    Assignee: Bitzer Kuhlmaschinenbau GmbH & Co.KG
    Inventors: Hossner Klaus, Stenzel Adalbert
  • Patent number: 5380159
    Abstract: A pressure compensation device for use in a high-pressure direct driven pump to control the output pressure of the pump is shown and described. In a preferred embodiment, the high-pressure pump has a valve assembly that selectively allows fluid pressurized by a reciprocating plunger to pass from a pressurization chamber to an outlet chamber from which the pressurized fluid is collected for use. A pressure compensation device has a lever which balances a control force against a force generated by the high-pressure fluid in the outlet chamber. When the outlet pressure exceeds a selected level, the pressure compensation device acts to prevent the further pressurization of fluid by causing the fluid to flow back out of the pressurization chamber via the same passageway(s) through which the fluid was originally introduced into the system.
    Type: Grant
    Filed: June 16, 1994
    Date of Patent: January 10, 1995
    Assignee: Flow International Corporation
    Inventors: John H. Olsen, Olivier L. Tremoulet, Jr., Chidambaram Raghavan
  • Patent number: 5326229
    Abstract: An assembly is disclosed for supplying compressed air to both an engine and an air suspension of a motor vehicle. The assembly comprises a direct current electric motor, a centrifugal air pump, and a piston pump. The motor has a shaft extending outwardly from opposite sides of the motor, with the centrifugal pump being driven by one end of the shaft and the piston pump being driven by the other end of the shaft. The centrifugal pump produces high volumes of air at low pressure required by the engine, while the piston pump produces low volumes of air at high pressure required by the air suspension. Bypass valves are provided to selectively divert the air provided by the pumps to the atmosphere.
    Type: Grant
    Filed: June 28, 1993
    Date of Patent: July 5, 1994
    Assignee: Ford Motor Company
    Inventor: Ronald J. Collins
  • Patent number: 5271722
    Abstract: An automotive control system for hydrostatic pumps includes a hydraulic circuit with an automotive orifice located upstream of the main hydrostatic loop with replenishing check valves and downstream of the fill pump. The location of the automotive orifice upstream of the check valves isolates system leakage from affecting flow to the automotive orifice. A hydrostatic unit displacement control valve has a drain side connected to the hydraulic circuit downstream of the fill pump and in parallel with the automotive orifice, and has a supply side connected downstream of the automotive control orifice. The input logic of the control valve is reversed to compensate for the greater pressure available to the drain side of the control valve as compared to the supply side. Reversing the input logic of the control valve provides servo control pressures without the need to isolate the control supply from the hydrostatic loop supply.
    Type: Grant
    Filed: January 11, 1993
    Date of Patent: December 21, 1993
    Assignee: Sauer Inc.
    Inventor: Jeffrey C. Hansell
  • Patent number: 5203683
    Abstract: A screw pump having a pair of screw rotors meshed with each other and rotatably supported in a housing having an intake port provided at one end and a piston movably provided at the other axial end of the housing, which piston defines a discharge port in cooperation with the housing. The movement of the piston in a direction substantially perpendicular to the axes of the screw rotors enables the distance between a discharge starting position of the discharge port and the intake port to be varied, so that the internal compression ratio can be varied. This arrangement ensures that the size of the housing will not be increased and any disadvantage due to the difference in thermal expansion along the length of the housing can be overcome.
    Type: Grant
    Filed: November 6, 1991
    Date of Patent: April 20, 1993
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Mamoru Yoshikawa, Taketoshi Satoh
  • Patent number: 4792288
    Abstract: The invention relates to a compressor (2) which is encapsulated in a housing (4) and which can be rotated about the axis (16) of its crankshaft (8) while maintaining the oil lubrication of the moving parts of the compressor. The interior (14) of the housing (4), in which an oil sump (18) is located, is connected flow-wise to the compressor (2). According to the invention, the interior (14) is connected to two gas lines (24, 26) which lead to a common manifold (32) via at least one shutoff valve (28, 30). The connecting openings (25, 27) of the two gas lines (24, 26) leading into the interior (14) are arranged opposite to one another in the vicinity of the axis (16) of the crankshaft (8). By these measures, the compressor can be inclined relative to the horizontal over a wide angular range without lubricating oil flow into the gas loop.
    Type: Grant
    Filed: October 2, 1987
    Date of Patent: December 20, 1988
    Assignee: Siemens Aktiengesellschaft
    Inventors: Bernd Gromoll, Peter Gulden
  • Patent number: 4465297
    Abstract: A vehicle height control apparatus including a compressor, a drier for drying the compressed air from the compressor and absorbers telescopically extendable and retractable by introducing or discharging compressed air for charging the height of a vehicle. The residual compressed air in the drier is released to the atmosphere by means of a control unit after the compressor has stopped. The starting load on the compressor is thus mitigated.
    Type: Grant
    Filed: September 27, 1982
    Date of Patent: August 14, 1984
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventor: Shinichi Yamahara
  • Patent number: 4173255
    Abstract: A low well yield control system and method for preventing over pumping of wells and other fluid reservoirs. The control is positioned in the reservoir and includes a plurality of relief valves which are opened to replenish liquid in the reservoir from the pumped liquid in the event the liquid level is lowered relative to a float.
    Type: Grant
    Filed: October 5, 1978
    Date of Patent: November 6, 1979
    Inventor: Richard W. Kramer
  • Patent number: 4077208
    Abstract: A valve regulates the pressure of secondary air discharged from a pump to a constant value. A second valve then meters the flow in accordance with the amount of air taken into the engine.
    Type: Grant
    Filed: July 22, 1976
    Date of Patent: March 7, 1978
    Assignee: Nissan Motor Company, Limited
    Inventor: Hiraki Sawada