Multiple Cyclic Inlet Paths Patents (Class 417/503)
  • Patent number: 11454089
    Abstract: Disclosed is a work for oilwell plunger pumping under a packer system used to increase the wear life of API ball and seat valves and of ball and seat valves seat utilizing a piston actuator mechanism to unseat the ball from the seat, which during operation, create turbulent flow within the housing to increase force to move piston actuator like rifle bullet or weighted blow dart in dynamic high velocity high impact in stages to overcome hydraulic head and surface tension between ball and seat. Also disclosed umbrella shaped disks on the piston actuator for increased force to be used in both insert and tubing type down hole plunger oil well pumps. The labyrinth of fluid passages that are rectangular channels not holes help keep ball off its seat for complete down stroke and keep solids in suspension to prevent plugging of API ball in API valve cage.
    Type: Grant
    Filed: August 10, 2020
    Date of Patent: September 27, 2022
    Inventor: Joe A. Nelson, II
  • Patent number: 10907738
    Abstract: Apparatus and method contemplating a high pressure fluid end assembly having a body defining a body bore and defining a recess in the body intersecting the body bore. A closure is joined to the body and forms a sealing surface. A seal is mounted to the body in the recess and configured to extend from the recess beyond the body bore to seal against the sealing surface formed by the closure.
    Type: Grant
    Filed: March 10, 2020
    Date of Patent: February 2, 2021
    Assignee: Kerr Machine Co.
    Inventors: Mark S. Nowell, Kelcy Jake Foster, Michael Eugene May, Brandon Scott Ayres, Christopher Todd Barnett, Micheal Cole Thomas, Guy J. Lapointe
  • Patent number: 10591446
    Abstract: A piston member for a high-pressure pump for pumping fluid in a sample separation apparatus, wherein the piston member comprises a piston configured for being mountable to reciprocate in a piston chamber for displacing fluid, and a sealing for sealing between the piston member and the piston chamber when the piston member is mounted in the piston chamber to reciprocate, wherein the sealing is mounted on the piston so as to reciprocate together with the piston.
    Type: Grant
    Filed: March 31, 2014
    Date of Patent: March 17, 2020
    Assignee: Agilent Technologies, Inc.
    Inventors: Blasius Nocon, Joachim-Richard Wagner, Karsten Lehradt
  • Patent number: 9157301
    Abstract: A method and apparatus for improving the production efficiency of a well and preventing gas lock. The apparatus is a downhole pump and comprises a barrel, a reciprocating plunger and a body having a plurality of inlet valves. The apparatus does not require outlet valves. The body and inlet valves are positioned above the barrel and plunger, thus eliminating gas lock. Fluids enter the body through the valves and, during upstrokes of the plunger, are forced up the tubing string to the surface equipment. Modularity of the components permits pump components to be changed as the productivity of the well fluctuates and also allows production of more fluids with a smaller casing.
    Type: Grant
    Filed: February 22, 2013
    Date of Patent: October 13, 2015
    Assignee: Samson Pump Company, LLC
    Inventor: Howard Blankenship
  • Patent number: 8506262
    Abstract: A method for operating at least one pump in a pump assembly comprises providing a pump assembly comprising a fluid end and a power end, the fluid end in communication with a fluid source and at least one downstream destination and comprising a pump housing for a pressurizable chamber, at least one valve for controlling fluid communication with the chamber, the at least one valve defining a normal duration of allowing fluid communication with the chamber during operation of the pump assembly, providing a valve actuation guide external to the chamber, the valve actuation guide coupled to the valve and operable to assist in controlling fluid communication with the chamber, operating the pump assembly, and actuating the valve actuation guide to change an aspect of the valve duration.
    Type: Grant
    Filed: February 4, 2010
    Date of Patent: August 13, 2013
    Assignee: Schlumberger Technology Corporation
    Inventors: Edward Leugemors, Rajesh Luharuka, Toshimichi Wago, Philippe Gambier, Jean-Louis Pessin, Aparna Raman
  • Patent number: 8419380
    Abstract: A noise reducing device for a hermetic type compressor is provided that includes a plurality of cylinders disposed at upper and lower portions thereof, a communication path that provides for communication between inlets of the plurality of cylinders, and a suction pipe coupled to an inlet of one of the plurality of cylinders. Such an arrangement may reduce a number of components and simplify the fabrication process. Accordingly, fabrication costs may be reduced, and vibration due to resonation of a plurality of suction pipes may be avoided. Further, such an arrangement may provide enhanced performance by optimizing a specification of the suction pipe and a suction path thereof.
    Type: Grant
    Filed: February 25, 2009
    Date of Patent: April 16, 2013
    Assignee: LG Electronics Inc.
    Inventor: In-Seok Ko
  • Publication number: 20090035629
    Abstract: A multi-channel pump includes a pump chamber, an inflow passage connected to the pump chamber, two or more outflow passages connected to the pump chamber, outflow side active valves provided so as to correspond to the outflow passages, and a movable body reciprocated to change a volumetric capacity of the pump chamber. The movable body may be a piston reciprocated within a cylinder that is connected to the pump chamber. A control method for a multi-channel pump includes an initial discharge step between a suction step and a discharge step. The multi-channel pump may be preferably utilized in a fuel cell.
    Type: Application
    Filed: October 6, 2008
    Publication date: February 5, 2009
    Applicants: NIDEC SANKYO CORPORATION, MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
    Inventors: Mitsuo Yokozawa, Kenji Muramatsu
  • Patent number: 6676387
    Abstract: A metering device contains a rotor which defines elongate chamber, there being a shuttle contained within the chamber movable between two terminal end positions. Frusto-conical surfaces defined on the rotor cooperate with annular members defining corresponding seats. One passage extends from one end of the chamber to one frusto-conical surface, and another passage extends from the other end of the chamber to the other frusto-conical surface. Each annual element defines a respective inlet and outlet for fluid and a shuttle is present within the chamber. As the rotor rotates, the shuttle effects a shuttling movement thus measuring dispensed volumes of fluid. A sensor is provided to detect physical contact of the shuttle with the end of the chamber to cause the rotor to advance.
    Type: Grant
    Filed: April 16, 2002
    Date of Patent: January 13, 2004
    Inventor: Laurence Richard Penn
  • Patent number: 6622612
    Abstract: A pump, particularly a plunger pump, comprises a crank mechanism oscillating a plunger in a housing and an elastic sealing device fastened to the plunger. The sealing device provides a pressure-tight sealing with respect to a lower housing space containing the crank mechanism. As a result, an intermediate space in the housing may be filled with air. The intermediate space is hermetically separated from the lower housing space containing the crank mechanism.
    Type: Grant
    Filed: May 14, 2002
    Date of Patent: September 23, 2003
    Assignee: Hammelmann Maschinenfabrik GmbH
    Inventor: Stephan Notzon
  • Patent number: 6318644
    Abstract: A fluid transfer pump wash-out apparatus is provided to facilitate cleaning of fluid transfer pump system components. The wash-out apparatus is adapted for temporary or permanent insertion between at least one pump liquid source pick-up point and a pump intake. The body of the wash-out apparatus is preferably adapted for connection in a pick-up hose assembly. The wash-out apparatus body is joined to a flow valve that is coupled to an intake coupler. The flow valve is operable to control the flow of fluid from the first pick-up hose into the body. The intake coupler is in turn coupled to a first pick-up hose that transports fluid from the liquid source pick-up point to the wash-out apparatus. An output coupler joined to the output end of the body is coupled to a second pick-up hose for connection to the fluid transfer pump assembly. A wash-out hook-up is provided to couple the body of the wash-out apparatus to a source of cleaning fluid.
    Type: Grant
    Filed: December 11, 1998
    Date of Patent: November 20, 2001
    Inventor: Ronnie Joe Weiand
  • Patent number: 6318977
    Abstract: A reciprocating compressor that includes an auxiliary port 38 in series with a check valve 40 to move fluid at an intermediate pressure that is between the main suction and discharge pressures. Piston 31 normally covers the auxiliary port during a portion of its stroke. In one embodiment the check valve 40 is oriented so that fluid flows into the compressor. The piston 31 uncovers the auxiliary port 38 during the early part of the down stroke to allow fluid in through the port. As the piston 31 continues to move down it covers the auxiliary port, which drops pressure in chamber 37 to allow fluid to enter through a main suction valve 34. In other embodiments the orientation of the check valve is reversed and auxiliary port acts as an auxiliary discharge port. Multiple auxiliary ports may be used in a single cylinder to achieve multiple suction and/or discharge pressures.
    Type: Grant
    Filed: October 5, 1998
    Date of Patent: November 20, 2001
    Assignee: WorkSmart Energy Enterprises, Inc.
    Inventor: William Leslie Kopko
  • Patent number: 6116869
    Abstract: The present invention is a pumping system which mixes liquids with a well-controlled proportioning and flow rate. The pumping system according to the invention comprises a liquid mixing device (MX) placed upstream from a pump (P). The liquids are taken from vessels (RA, RB), cyclically introduced, in a determined proportion, in a mixing chamber (9) through alternate opening of on-off solenoid valves (EVA, EVB). The system is controlled at the input by using a damping means such as bellows (11A, 11B) in antechambers (8A, 8B) in order to avoid the effects of velocity discontinuities at the time of the opening and of the closing of the valves. The delivery of pump (P) is controlled at the input as well as at the discharge end. The system may be used for liquid chromatography plants.
    Type: Grant
    Filed: September 4, 1998
    Date of Patent: September 12, 2000
    Assignee: Institut Francais du Petrole
    Inventors: Fran.cedilla.ois Couillard, Andre Renot
  • Patent number: 6116870
    Abstract: A high pressure pump which has a working chamber, which on the one hand, is connected to a low pressure circuit via a solenoid valve and on the other hand, is connected to a high pressure reservoir via a check valve. The solenoid valve has a spring-loaded closing body, which cooperates with a valve seat and together with it, constitutes the check valve. When the magnet is without current, the check function of the closing body is switched off via a valve tappet of the solenoid valve so that even with an initial working stroke of the high pressure pump, the connection to the low pressure circuit is maintained. Only with a supply of current to the solenoid valve executed during the working stroke does the valve tappet allow the closing body to contact its valve seat, whereupon the high pressure delivery then begins. The high pressure pump is designated for use in fuel injection systems of diesel motor vehicle engines.
    Type: Grant
    Filed: October 29, 1997
    Date of Patent: September 12, 2000
    Assignee: Robert Bosch GmbH
    Inventor: Manfred Kraemer
  • Patent number: 5984651
    Abstract: The present invention relates to a hydraulic brake system which operates by the feedback principle during brake slip control operations and includes a self-priming pump that aspirates pressure fluid from a pressure fluid reservoir for traction slip control operations. In order to improve the delivery rate of the pump, having a parallel arrangement of the two suction valves, a special construction of the pump-assembly is proposed, wherein the two suction valves are integrated in the pump housing. Advantageously, the suction valves are in axially opposed relationship, and the first suction valve is arranged on the movable piston, and the second suction valve is connected with a screw cap. Further, a pump for a slip-controlled hydraulic brake system according to the present invention is suggested having at least one suction valve with a valve seat, a closure member and a valve spring, the preload of the valve spring being variable in response to the position of a delivery piston.
    Type: Grant
    Filed: July 22, 1997
    Date of Patent: November 16, 1999
    Assignee: ITT Automotive Europe, GmbH
    Inventors: Erhard Beck, Hans-Dieter Reinartz, Albrecht Otto
  • Patent number: 5915927
    Abstract: A plunger pump includes a piston which is driven for reciprocatory motion and associated with a check valve. A space within a cylinder is partitioned by a piston 1p into a first space A which communicates with a discharge port 1ep and a second space B which communicates with a suction port 1ip. To reduce the peak value of a fluctuation in the suction pressure, a third port 2ip communicating with the first space A is added, and the suction port 1ip and the third port 2ip are connected in common to a suction line Pin through check valves 20 and 19, respectively. The first space A has a diameter greater than the diameter of the piston while the second space B has a diameter which is comparable to the diameter of the piston and hence is less than that of the first space A. On the forward stroke of the piston, a braking liquid is drawn into the second space from the suction line Pin.
    Type: Grant
    Filed: September 3, 1997
    Date of Patent: June 29, 1999
    Assignee: Aisin Seiki Kabushiki
    Inventor: Hiromu Kuromitsu
  • Patent number: 5894609
    Abstract: A method and apparatus for alternately providing and releasing suction to a plurality of pool drains or if desired alternately providing suction and liquid under pressure to pool drains to prevent one from becoming stuck to the drains. This includes introducing a valve arrangement between the drains and the suction pump which is continuously operated to control the flow between the drains and the pump.
    Type: Grant
    Filed: March 5, 1997
    Date of Patent: April 20, 1999
    Inventor: Ralph L. Barnett
  • Patent number: 5741710
    Abstract: The invention relates to a reaction chamber, which includes a cylindrical vessel, with at one end, at least one inlet or outlet tube or lead-through fitted with a valve for a liquid or gaseous component. The other end of the vessel is open. The reaction chamber further comprises a plunger, which performs a reciprocating movement within the cylindrical vessel in axial direction through the open end of the vessel. The plunger tightens against the inner wall of the cylindrical vessel, and has at least one channel, in substantially axial direction, fitted with a valve or connected to a tube fitted with a valve. The invention relates also to an assay method based on the use of the reaction chamber.
    Type: Grant
    Filed: June 11, 1996
    Date of Patent: April 21, 1998
    Inventor: Paul Ek
  • Patent number: 5718570
    Abstract: A reciprocating piston pump provides pulsation free delivery of liquid. It is suitable for use in compact environments or for the delivery of small amounts of liquid, as in chromatographic analysis devices. The pump includes two pistons with pumping chambers that are alternately connected to inflow and outflow lines through a control valve. The control valve moves between a first position in which inflow is directed to the first piston chamber and outflow to the second piston chamber, and a second position in which outflow is directed to the first piston chamber and inflow is directed to the second piston chamber. Each outflow pulse from the piston is sustained longer than each inflow pulse, and the outflow pulses are staggered and partially superimposed to provide substantially pulsation free delivery of liquid from the pump. A rotating cam moves the pistons of the pumps and the control valve between their operating positions described above.
    Type: Grant
    Filed: March 20, 1995
    Date of Patent: February 17, 1998
    Assignee: Micropump Corporation
    Inventors: Carl D. Beckett, Kevin O'Hara, Daniel B. Olsen
  • Patent number: 5707221
    Abstract: The present invention relates to a pumping method utilizing two suction inlet holes spaced a predetermined distance apart by an extension robe. In a variant, the pumping method utilizes two pump barrels cooperating each with the two inlet holes. In another variant, the pumping method utilizes a pump barrel and control for controlling the flow rates of effluents coming from the two inlet holes. Application of the method is preferable when pumping effluent from subhorizontal drain holes.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: January 13, 1998
    Assignee: Institit Francais du Petrole
    Inventor: Christian Wittrisch
  • Patent number: 5653876
    Abstract: In order to reduce the overall size of serial pump arrangements, several block-disk-like building elements are used. These building elements are made of a non-metallic material and lie against each other with their control surfaces in a sandwich like stack. Two of the block-disk-like building elements have displacement chambers oriented transversely to the axis of the stack, in each of which is guided a push piston. Inflow and outflow bores in which the high pressure mass flow, for example a chemical buffer, is created, extend parallel to the stack axis. Both building elements form two serially arranged pumping units of the serial pump arrangement and ensure a constant and continuous mass flow. Check valves are provided at the suction and delivery sides of both pumping units. Besides saving space, this arrangement ensures a highly constant and continuous mass flow, as the throughflow paths are as short as possible.
    Type: Grant
    Filed: June 11, 1995
    Date of Patent: August 5, 1997
    Inventor: Herbert Funke
  • Patent number: 5531078
    Abstract: A low volume inlet reciprocating compressor suitable for use in a dual evaporator refrigeration cycle. The compressor includes a cylinder having an inlet port and an outlet port disposed in a housing. A flexible conduit having an inlet passage formed therein extends between the inlet port and an inlet in the housing, and a check valve is connected to the inlet passage so as to prevent refrigerant flow out of the conduit. The inlet passage is located as close as possible to the inlet port. A suction muffler can be located in the housing with one end connected to a second inlet in the housing and another end connected to the check valve. A discharge tube is provided between the outlet port and outlet opening in the housing.
    Type: Grant
    Filed: December 27, 1994
    Date of Patent: July 2, 1996
    Assignee: General Electric Company
    Inventors: James Day, Stephen Searl
  • Patent number: 5374168
    Abstract: A reciprocating piston fluid pump according to the present invention comprising: a pump driving section including a cam operated by an engine and a roller driven by the cam, the roller being provided at a lower end of a piston rod; a piston provided at an upper portion of the piston rod; a pump chamber housing the piston and divided into a piston upper chamber and a piston lower chamber by the piston, the pump chamber including a bearing opening at a central portion of the piston lower chamber, through which the piston rod extends; a rod seal retainer portion provided between the piston rod and the bearing opening of the pump chamber; a spring for urging the piston rod downwardly; oil passage means for communicating the pump upper chamber or the pump lower chamber with the bearing opening, the oil passage means being provided on an oil seal member or the piston rod; oil supply means for supplying lubricating oil to the pump driving section or the bearing opening; and at least one communication hole provided b
    Type: Grant
    Filed: October 14, 1993
    Date of Patent: December 20, 1994
    Assignees: Aisan Kogyo Kabushiki Kaisha, Toyota Jodosha Kabushiki Kaisha
    Inventors: Tadashi Kozawa, Hiroshi Okano, Hideo Nagayama, Kazuya Andoh
  • Patent number: 5338166
    Abstract: An improved evacuation pump system uniquely designed to evacuate both lidded rigid containers and sealable flexible containers. A vacuum cup fixed to one end of a reciprocating piston pump attaches to the lid of rigid containers for their evacuation and a flexible probe connects to the pump for flexible container evacuation. To achieve this dual function a inlet passage in the pump has a cross bore that slidably and/or rotatably receives a two position valve that selectively connects the pumping chamber with two outlets, one associated with each mode. The flexible probe connects directly to this valve reducing the need for separate passageways.
    Type: Grant
    Filed: February 16, 1993
    Date of Patent: August 16, 1994
    Assignee: Pioneering Concepts Incorporated
    Inventor: Glen R. Schultz
  • Patent number: 5335734
    Abstract: A pump apparatus dispenses a liquid and additive mixture and has a pump cylinder with intake and discharge ports with associated valves. An additive supply communicates with the pump cylinder to supply additive with liquid drawn into the pump during an intake stroke prior to a discharge stroke during which a mixture of additive and liquid is discharged from the pump. The additive is mixed in the liquid prior to passing into the intake port and is metered to attain the desired concentration. An aerating nozzle receives mixture discharged from the discharge port to produce foam for various applications, such as fire fighting. The aerating nozzle has a restrictor orifice located adjacent and upstream from air entainment opening in the nozzle. The restrictor orifice can be a simple non-tapered cylindrical passage, but for improved foam generation, the orifice can be a diverging passage with a step between inlet and outlet portions of the passage.
    Type: Grant
    Filed: May 4, 1993
    Date of Patent: August 9, 1994
    Assignee: Scott Plastics Ltd.
    Inventors: Blayney J. Scott, Barry G. Gilbert, George R. Gowan
  • Patent number: 5299917
    Abstract: An improved evacuation pump system with dual inlet check valves uniquely designed to evacuate both lidded rigid containers and sealable flexible containers. A vacuum cup fixed to one end of a reciprocating piston pump attaches to the lid of rigid containers for their evacuation and a flexible probe connects to the pump for flexible container evacuation. To achieve this dual function two check valves mounted in the lower end of the pump are provided for the flexible container evacuation mode. One prevents discharge flow into the flexible probe and the other maintains suction in the cup to keep the pump attached to its supporting surface.
    Type: Grant
    Filed: February 16, 1993
    Date of Patent: April 5, 1994
    Assignee: Pioneering Concepts Incorporated
    Inventor: Glen R. Schultz
  • Patent number: 5219455
    Abstract: A pump with piston for feeding liquid mixture for ice-cream from a tank to a whipping cylinder in a machine for the production of soft-type ice-cream, comprises valve means to connect in an adjustable way the cylinder of the pump with ambient air; a check valve positioned at the inlet of the delivery duct; an offtake or by-pass duct connecting the delivery duct with the sucking duct; and a second, by-pass valve, mounted in the offtake duct.
    Type: Grant
    Filed: February 21, 1992
    Date of Patent: June 15, 1993
    Assignee: GIANT S.r.l.
    Inventor: Dario Trucco
  • Patent number: 5158675
    Abstract: To supply a programmed gradient to a high pressure pump for introduction into a column, a mixer, degasser and accumulator communicates with the high pressure pump to supply fluid thereto, having a volume no more than 150 times the chamber volume of the high pressure pump. The mixer, degasser and accumulator includes temperature sensors which sense when the mixer, degasser and accumulator has been emptied to a level where it cannot respond to a demand for fluid from said high pressure pump and provides a signal to a low pressure pump which responds by cycling to again fill the mixer, degasser and accumulator. Upon receiving a demand signal, the low pressure pump fills by drawing fluid from a plurality of fluid sources to compose the gradient being used at that time, with the pump slowing during valve opening and closing so as to avoid cavitation.
    Type: Grant
    Filed: June 11, 1990
    Date of Patent: October 27, 1992
    Assignee: Isco, Inc.
    Inventors: Robert W. Allington, Daniel G. Jameson
  • Patent number: 5062774
    Abstract: A solution pumping system including a disposable pump cassette is disclosed, with the system configured for efficient and accurate preparation of parenteral admisture solutions. The system includes a pump driver having a reciprocable pump plunger and a plurality of associated valve actuators. The disposable pump cassette of the system is configured for removable positioning in operative association with the pump driver, and includes a positive displacement pump configured for operation by the reciprocable pump plunger. The pump cassette further includes a plurality of liquid inlets, and at least one liquid outlet joined in fluid communication with the inlets. By selective operation of the valve actuators of the pump driver, one or more selected source solutions are drawn through the pump inlets by the positive displacement pump, and directed through the pump outlet to an admixture solution container.
    Type: Grant
    Filed: December 1, 1989
    Date of Patent: November 5, 1991
    Assignee: Abbott Laboratories
    Inventors: David E. Kramer, Andrew J. Muetterties, Walter T. Szempruch
  • Patent number: 5017105
    Abstract: A metering pump comprises a diaphragm chamber with a diaphragm, a suction conduit connecting the diaphragm chamber with a metering agent tank, a pump cylinder defining a cylinder space and having an inlet connected to the diaphragm chamber and an outlet connected to a metering point through a metering conduit, and a metering piston in the pump cylinder. The metering piston is formed as a hollow tubular piston which comprises an annular seal disk at the side thereof opposite to the metering conduit. The cylinder space is defined by a stop ring and an actuating tappet movingly passes therethrough. At the beginning of a suction stroke the seal disk sealingly abuts the stop ring but allows the metering agent to pass through during the further movement of the tappet. The metering piston in no position thereof emerges from a compression ring.
    Type: Grant
    Filed: August 20, 1990
    Date of Patent: May 21, 1991
    Assignee: Grunbeck Waseraufbereitung GmbH
    Inventor: Franz Rottel
  • Patent number: 5009577
    Abstract: A rotary compressor of variable displacement type comprises a cylinder, a rotor accommodated in the cylinder in an eccentric relationship therewith, at least one vane incorporated in the rotor through an outer periphery of the latter and movable relative to the rotor reciprocatively in a longitudinal direction of the vane, and two side plates closing the cylinder at both axial ends of the latter. A suction port is formed in at least one of the side plates, while an opening portion is formed in a rear side portion of the vane as viewed in a direction of rotation of the rotor and being opened at a surface of the vane making sliding contact with the rotor. This opening portion is repeatedly communicated with and interrupted from a working space in the compressor according to the reciprocative movement of the vane relative to the rotor.
    Type: Grant
    Filed: October 20, 1989
    Date of Patent: April 23, 1991
    Assignee: Hitachi, Ltd.
    Inventors: Isao Hayase, Kunisuke Tejima
  • Patent number: 4975028
    Abstract: Apparatus for evacuating a rigid container using a two-stroke reciprocating-piston pump having an air evacuating vacuum cup which is to be applied to the container lid. The pump cylinder houses a reciprocating piston-check-valve. An adhesive-tape check valve is applied to a container access opening in the lid; and the vacuum cup is seated over the adhesive-tape check valve to evacuate the rigid container. An alternative embodiment employing a vacuum probe having an in-line check valve is inserted into an otherwise plugged opening in the pump cylinder wall to evacuate a deformable container. In the second embodiment, the adhesive-type check valve is eliminated. The two check valves employed in each embodiment alternate open and closed states during piston reciprocation.
    Type: Grant
    Filed: January 13, 1989
    Date of Patent: December 4, 1990
    Inventor: Glen R. Schultz
  • Patent number: 4915602
    Abstract: The pump possesses an inlet and an outlet for the fluid to be pumped, a housing bounded at one end by an end member and enclosing an inner space, in which a piston is displaceably guide. The inlet is connected, by way of the end members and by way of a first back-pressure valve, with the pump chamber provided between the end member and the piston, said pump chamber being connected, by way of the end member and a second back-pressure valve, with the outlet. The piston is equipped with a third back-pressure valve, which additionally connects the inlet with the pump chamber, and makes it possible to largely prevent--during the suction strokes and particularly during the beginning phases thereof--any pressure drops from occurring, that could cause in the pump chamber the reconversion of fluid from the liquid to the gaseous state.
    Type: Grant
    Filed: May 9, 1988
    Date of Patent: April 10, 1990
    Assignee: Cryopump AG
    Inventor: Claudio Tschopp
  • Patent number: 4824342
    Abstract: An injector device for a plunger-type pump of the type having one or more cylinders, an intake valve for each cylinder operatively disposed between the pump's low pressure inlet port and each of its cylinders and outlet valve(s) for each cylinder operatively disposed between the cylinders and the pump's high pressure outlet port, where the intake and outlet valves are held in place by removable threaded plugs which afford access to the valves so that they can be repaired or replaced. The injector device comprises a threaded plug member adapted to replace one of the removable plugs used to hold an intake valve in place, but also includes a longitudinal bore in which is mounted a one-way check valve. The inlet side of the check valve is adapted to be coupled to a chemical supply tank. Also, a restrictor is placed between the particular intake valve held in place by the injector plug and the pump's inlet port.
    Type: Grant
    Filed: February 16, 1988
    Date of Patent: April 25, 1989
    Assignee: Hypro Corp.
    Inventor: Michael D. Buck
  • 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: 4673296
    Abstract: The invention is drawn to a mixing pump which can transport and effectively mix (homogenize) two or more liquids (or gases) in all ratios between the pure components. The ratio is constant, but is adjustable. This is effected by a double-acting pump cylinder (or two coupled, single-acting cylinders) which produces a charge of the mixture in a two-stroke-cycle. During the 1st stroke liquid (V1) is pumped from one side of the piston (2) through a restriction (12) (pressure drop) into the liquid (V2), while the liquid (V2) is sucked into the cylinder on the other side of the piston. During the 2nd stroke the mixture (V1+V2) is pumped to a storage tank through a restriction (13) (pressure drop), while the liquid (V1) is sucked into the cylinder. By adjusting (by regulator 6), the amount of the liquid (V1) pumped into the liquid (V2), the pump can deliver any ratio of the two components.
    Type: Grant
    Filed: July 18, 1985
    Date of Patent: June 16, 1987
    Assignee: Dymo Science Inc.
    Inventor: Arne B. Sjogren
  • Patent number: 4577606
    Abstract: In a pressure valve inserted in a fuel supply conduit between a fuel injection pump and an injection vavle of the internal combustion chamber and comprising a valve member and a locking member cooperating with the valve member and opening in the direction of the fuel supply, and a back-pressure relief valve including a closing element which closes an axial bore of the locking member, a throttle orifice is provided in the connection between the axial bore of the locking member and an axial recess formed in the connection element connected to the fuel supply conduit leading to the internal combustion engine so that no after-injections occur, and a sufficiently great stable pressure is maintained in the fuel supply system.
    Type: Grant
    Filed: November 13, 1984
    Date of Patent: March 25, 1986
    Assignee: Robert Bosch GmbH
    Inventors: Wilfried Bohringer, Franz Eheim, deceased, Wolfgang Fehlmann, Helmut Laufer, Karl Zibold
  • Patent number: 4573932
    Abstract: A marine propulsion device including a fluid pumping device comprising a first mechanism for pumping fluid comprising a pump housing defining a recess, a movable wall which is in the recess and which cooperates with the recess to define a variable volume fluid pumping chamber, a fluid inlet in communication with the fluid pumping chamber, a check valve in the fluid inlet permitting fluid flow into and preventing fluid flow from the fluid pumping chamber, a fluid outlet in communication with the fluid pumping chamber, a check valve in the fluid outlet preventing fluid flow into and permitting fluid flow from the fluid outlet, a spring for moving the movable wall in one direction, a solenoid mechanism comprising a plunger connected to the movable wall and a solenoid coil for moving the plunger and the movable wall in an opposite direction against the action of the spring, and a second mechanism connected to the movable wall for pumping fluid.
    Type: Grant
    Filed: February 8, 1984
    Date of Patent: March 4, 1986
    Assignee: Outboard Marine Corporation
    Inventor: Chester G. DuBois
  • Patent number: 4552515
    Abstract: A tube pump for use in pumping a liquid from one place, such as a tank, to another, such as a vessel, the tube pump comprising a first tube for sucking a liquid from a tank; a second tube for allowing the sucked liquid to discharge therethrough; a connecting chamber located in the joint of the first and the second tube, where these two tubes are communicated with each other; a bellows member communicating with the connecting chamber, the bellows member being adapted to be gripped by the user's hand; the bellows member having an opening closable by a valve member; the valve member including a cap having an aperture in its center, and a cover including a stem slidably passed through the aperture, wherein the aperture is airtightly closed by the stem when no force acts on the cover but is opened when the cover is pushed downwards.
    Type: Grant
    Filed: September 5, 1984
    Date of Patent: November 12, 1985
    Inventor: Tsuyoshi Endo
  • Patent number: 4523903
    Abstract: A dosing pump (1) is created allowing to accurately dose a medium to be dosed as a function of time or of a flow rate. The dosing pump (1) utilizes a predelivery obtained by a diaphragm (11) as well as a piston-cylinder-pump for dosing. The pump cylinder is connected with the suction conduit so as to prevent any pressure drop when the piston emerges from the cylinder. A crystallization or polymerization of the dosing agent in the piston-cylinder-means is thereby prevented.
    Type: Grant
    Filed: November 9, 1983
    Date of Patent: June 18, 1985
    Assignee: Grunbeck Wasseraufbereitung GmbH
    Inventor: Hans Arens
  • Patent number: 4515537
    Abstract: A dosing pump (1) is produced, with which a precise dosing is possible as a function of the time or of a flow rate. The dosing pump (1) operates with a preliminary transport obtained by means of a diaphragm (11). The stroke volume of the diaphragm (11) is greater than the volume of the pipe element present between a preliminary transport chamber (9) and a dosed medium tank (16). It is thereby made possible to omit a return pipe and a suction valve and a pressure valve.
    Type: Grant
    Filed: August 30, 1982
    Date of Patent: May 7, 1985
    Assignee: Grunbeck Wasserauebereitung GmbH
    Inventor: Hans Arens
  • Patent number: 4512727
    Abstract: A fuel injection pump of the rotary distributor type includes a rotary distributor member having a bore in which is slidable a plunger which can be actuated by a cam lobe. A stop ring is provided to limit the outward movement of the plunger by fuel which is supplied to the bore through an inlet passage in the distributor member when the latter is in register with an inlet port. The stop ring has a surface which will permit further outward movement of the plunger following cessation of fuel flow through the inlet port and passage and such additional movement to allow an excess of fuel to be delivered is allowed by fuel flow through an additional inlet passage. This passage is controlled by valve means which is preferably only opened when the engine is at rest.
    Type: Grant
    Filed: November 18, 1983
    Date of Patent: April 23, 1985
    Assignee: Lucas Industries public limited company
    Inventor: William R. Burborough
  • Patent number: 4502834
    Abstract: A first control assembly is provided operative to supply gas from a supply of gas under pressure to the inlet of a centrifugal liquid pump at increasing and decreasing rates responsive to decreases and increases in the pressure of liquid discharge from the pump. The first control assembly includes spring structure for closing an associated air flow controlling valve member which is yieldingly biased toward the open position by the pressure of liquid discharged from the pump and a second control assembly is provided operative to increase and decrease the loading of the aforementioned spring structure responsive to increases and decreases in demand for liquid being discharged from the pump.
    Type: Grant
    Filed: March 29, 1982
    Date of Patent: March 5, 1985
    Inventor: Samuel G. Jackson
  • Patent number: 4491150
    Abstract: An outdoor water holding and pumping system comprising a water tank into which is recessed a pump housing such that water in the tank surrounds and insulates the housing. A pump is disposed in the pump housing for pumping water from the tank to a desired location. The pump housing has a door providing access to the pump from outside the tank. The system preferably includes a housing conduit which extends from the housing to the base of the tank so that conduits to and from the tank can extend underground, through the tank, and to the pump without being exposed. Reserve conduit means are also preferably provided to provide a reserve supply of water to the pump. The system elements are preferably connected for transporting as a unit.
    Type: Grant
    Filed: November 30, 1981
    Date of Patent: January 1, 1985
    Inventors: Carroll Holman, Arley R. Fite
  • Patent number: 4416596
    Abstract: A fluid-transfer system has two pistons movable within a barrel so that the ends of the piston faces can move together or apart, the barrel having at least two openings therein for transfer of fluid into and out of said barrel. The pistons can be controlled manually, mechanically or by computer to draw fluid from one or more reservoirs into the barrel and transfer the selected fluid in selected quantity into a chamber for storage or for reaction or analysis. The system is particularly useful for transfer of fluid from a selected chamber to another selected chamber, for mixing fluids, and for carrying out multiple tests on blood taken from a patient or from a plurality of patients under the control of a computer, which can accept programs for carrying out specific procedures.
    Type: Grant
    Filed: April 9, 1981
    Date of Patent: November 22, 1983
    Inventor: Eric S. Lichtenstein
  • Patent number: 4412428
    Abstract: An apparatus for producing and dispensing an aerated frozen confection in which a pump is mounted in the liquid ingredients reservoir of the apparatus and operates to pump a mixture of air and liquid ingredients, in selected proportions, to the freezer compartment of the apparatus. The pump itself is responsive to pressure within the freezer compartment to regulate the volume of mixture supplied to the freezer compartment by the pump for enabling automatic replenishment of the aerated mix in the freezer compartment. The pump includes a plunger projecting into the freezer compartment and driven by a cam which rotates with an agitator in the freezer compartment to move the plunger against the bias of a spring in the pump so as to reciprocate the plunger until the pressure within the compartment is great enough to move the plunger away from the cam, against the bias of the spring, thereby discontinuing the supply of mix to the freezer compartment.
    Type: Grant
    Filed: June 3, 1981
    Date of Patent: November 1, 1983
    Assignee: Coldelite Corporation of America
    Inventors: Frank Giannella, Enzo E. Pellicciari
  • Patent number: 4407641
    Abstract: The pump comprises a pump stator (5), an electric motor stator (4), and a rotor (6) that constitutes the rotor both of the pump and of the electric motor. The pump stator comprises a tubular non-magnetic lining to the electric motor stator, and the rotor is mounted excentrically inside said tubular lining and is equipped with radially movable vanes (63) that co-operate with said lining to provide pumping action when the rotor rotates. The arrangement is particularly applicable to oil-sealed vacuum pumps, and has the advantage of being more compact than units of similar performance, but equipped with a pump and a motor that are separate and interconnected by a mechanical coupling, as is conventional practice.
    Type: Grant
    Filed: July 21, 1981
    Date of Patent: October 4, 1983
    Assignee: Societe Anonyme dite: Compagnie Industrielle des Telecommunications Cit-Alcatel
    Inventor: Jacques Long
  • Patent number: 4349321
    Abstract: A valve chamber connected to the inlet of a ram pump has an inlet connected to a source of sludge and a substantially smaller inlet connected to the outlet of a metering pump.A valve seat in the valve chamber has a ball resting freely thereon, and an operative connection between the ram pump and the metering pump synchronizes the suction stroke of the ram pump with the discharge stroke of the metering pump to cause the incoming sludge to lift and spin the ball and thereby mix the sludge with the incoming additive.
    Type: Grant
    Filed: November 13, 1979
    Date of Patent: September 14, 1982
    Inventor: Peter N. Bentley
  • Patent number: 4336000
    Abstract: The invention relates to a method of removing air or gas bubbles tending to collect in the "dead space" of a piston burette or another liquid dosage piston pump during operation thereof. The venting is performed by sucking a substantial volume of air into the pump cylinder in addition to a certain amount of liquid, and the air and part of the liquid within the pump cylinder is thereafter discharged therefrom. A piston dosage pump for carrying out this method comprises a valve mechanism by means of which the pump cylinder may be selectively communicated not only with a liquid inlet conduit and a liquid outlet conduit, but also with an air inlet passage.
    Type: Grant
    Filed: December 31, 1979
    Date of Patent: June 22, 1982
    Assignee: Radiometer A/S
    Inventors: Hans Jorgensen, Ib O. Sinnerup, Ole E. Danborg
  • Patent number: 4263602
    Abstract: An ink liquid supply system for an ink jet system printer comprises an ink liquid reservoir for containing ink liquid therein, and a constant flow rate pump for supplying the ink liquid to a nozzle. The constant flow rate pump comprises a cylinder block, a piston disposed in the cylinder block, and a diaphragm secured to one end of the piston. A first pressure chamber is defined by the other end of the piston, and a second pressure chamber is defined by the diaphragm. In response to the reciprocating movement of the piston, the first pressure chamber functions to introduce the ink liquid from the ink liquid reservoir and to develop the ink liquid of a constant flow rate to the nozzle. At the same time, the second pressure chamber functions to introduce a waste ink liquid from a beam gutter of the ink jet system printer and to return the waste ink liquid to the ink liquid reservoir.
    Type: Grant
    Filed: November 26, 1979
    Date of Patent: April 21, 1981
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Masafumi Matsumoto, Matahira Kotani
  • Patent number: 4262849
    Abstract: Abrasive coal dust contaminates and damages equipment used in coal mines. Such equipment must be cleaned periodically to remove any buildup of coal dust. The equipment is usually cleaned in areas with non-explosive atmospheres. The present invention provides a high pressure, mine equipment cleaning device utilizing a water based, non-flammable cleaning solution. The device is carried by a vehicle and is powered by pressure in the hydraulic system of the vehicle.
    Type: Grant
    Filed: April 26, 1979
    Date of Patent: April 21, 1981
    Inventor: Kenneth R. Elam