With Means To Supply Or Vent Pulsator Fluid Patents (Class 417/385)
  • Patent number: 11313361
    Abstract: A rolling diaphragm pump that can inhibit an increase in cost with a simple configuration is provided.
    Type: Grant
    Filed: November 6, 2018
    Date of Patent: April 26, 2022
    Assignee: NIPPON PILLAR PACKING CO., LTD.
    Inventors: Kazukiyo Teshima, Daisuke Urata
  • Patent number: 10648490
    Abstract: A fluid end with an internal bellows can be used in high pressure environments. The bellows is disposed within a plunger bore, and has an interior isolated from a working chamber of the fluid end. An end of a plunger is received in the interior of the bellows. The bellows contains an incompressible fluid at a constant volume. As the plunger extends into the interior of the bellows, the fluid it contains is displaced. Such fluid displacement causes the bellows to extend. As the plunger is retracted, the fluid replaces the volume formerly displaced by the plunger, and causes the bellows to accordion to a retracted position.
    Type: Grant
    Filed: July 24, 2018
    Date of Patent: May 12, 2020
    Assignee: Kerr Machine Co.
    Inventors: Kelcy Jake Foster, Mark S. Nowell, Guy J. Lapointe
  • Patent number: 10463785
    Abstract: A system for controlling administration of medical fluid includes a fluid passageway to which is attached a first flow regulator, a second flow regulator, and a flow detector. The system also includes a controller for controlling the first and second flow regulators in response to a measurement taken by the flow detector of fluid movement in the fluid passageway. The first flow regulator, such as a pump, is configured to maintain fluid movement at flow values greater than an unrestricted flow value. The second flow regulator, such as a variable adjustable valve, is configured to maintain fluid movement at a flow value less than the unrestricted flow value. A method of controlling administration of medical fluid includes obtaining a target flow value, moving fluid through the disposable assembly, taking a measurement of fluid movement in the disposable assembly, and actuating a flow regulating apparatus.
    Type: Grant
    Filed: July 31, 2015
    Date of Patent: November 5, 2019
    Assignee: CareFusion 303, Inc.
    Inventor: Paul Dewey
  • Patent number: 10245362
    Abstract: A ventricular assist device incorporating a rotary pump (3) such as a rotary impeller pump implantable in fluid communication with a ventricle and an artery to assist blood flow from the ventricle to the artery. The device includes a pump drive circuit (6) supplying power to the pump, one or more sensors (10) for sensing one or more electrophysiological signals such as electrogram signals in and a signal processing circuit (23) connected to the sensors and to the pump drive circuit. The signal processing circuit is operative to detect the sensor signals and control power supplied to the pump from the pump drive circuit so that the pump runs in a normal sinus rhythm mode, with a varying speed synchronized with the cardiac cycle. When a bradycardia arrhythmia is detected, the pump drive circuit may also nm the pump in a sinus bradycardia mode or a heart block mode different from the normal sinus rhythm mode.
    Type: Grant
    Filed: February 9, 2016
    Date of Patent: April 2, 2019
    Assignee: HeartWare, Inc.
    Inventor: Barry M. Yomtov
  • Patent number: 8888469
    Abstract: A hydraulically-controlled diaphragm pump including a pump chamber formed between a pump head and a pump body, a constant volume intermediate hydraulic chamber formed in the pump body and including a piston driven with reciprocating motion inside the intermediate chamber, a leak compensation volume for compensating leaks from the intermediate chamber being connected thereto by a top-up channel via a free check valve that is not rated and that passes fluid towards the working chamber. The check valve and at least a portion of the compensation volume are housed in a body fitted to the pump body at the high point of the intermediate hydraulic chamber in the working position of the pump.
    Type: Grant
    Filed: February 3, 2010
    Date of Patent: November 18, 2014
    Assignee: Milton Roy Europe
    Inventor: Rémy Lefebvre
  • Patent number: 8777592
    Abstract: A pump includes a pump body defining a fluid chamber and inlet and outlet ports in fluid communication with the fluid chamber, an inlet check valve connected to the inlet port, an outlet check valve connected to the outlet port, and a piston housing coupled to the pump body and defining a piston chamber. A piston assembly is disposed at least partially within the piston chamber and at least partially within the fluid chamber and includes a piston and a poppet connected to the piston in proximity to the pump body. In addition, the pump includes a gland disposed between a portion of the piston housing and the pump body. Further, the pump includes the poppet having a poppet head axially connected to a diaphragm coupled to a poppet flange. The poppet head is connected to the piston.
    Type: Grant
    Filed: July 12, 2010
    Date of Patent: July 15, 2014
    Assignee: Saint-Gobain Performance Plastics Corporation
    Inventor: Hy Nguyen
  • Patent number: 8591200
    Abstract: A system for pressurizing a working fluid includes a cylinder having an outlet through which the working fluid is exhausted at a discharge pressure, a plunger translatably disposed within the cylinder, and a hydraulic system. The plunger has a first piston coupled thereto, a second piston disposed opposite the first piston, wherein the second piston is driven to reciprocate, and a variable-volume chamber disposed between the first and second pistons. The hydraulic system is operable to adjust the volume of hydraulic fluid within the variable-volume chamber, whereby the discharge pressure is maintained substantially at a predetermined level.
    Type: Grant
    Filed: November 23, 2009
    Date of Patent: November 26, 2013
    Assignee: National Oil Well Varco, L.P.
    Inventor: Adrian Marica
  • Patent number: 8573309
    Abstract: The present invention comprises a downhole unit that includes at least one plunger and that uses a power fluid to recover production fluid from a well. The downhole unit recovers production fluid and brings it to the surface of the well during both the downward and upward motion of the at least one plunger. The downhole unit can also optionally dispose of unwanted fluids in a formation.
    Type: Grant
    Filed: June 30, 2009
    Date of Patent: November 5, 2013
    Inventor: Eugene Darrell Simmons
  • Patent number: 8398379
    Abstract: A chemical liquid supplying apparatus which can discharge chemical liquid with high accuracy is provided. The apparatus is used to discharge the chemical liquid in a chemical liquid tank from an application nozzle. The apparatus has a combined member formed integrally with a pump case and a cylinder, and a flexible tube serving as a pump member is provided in the pump case, wherein its inside is a pump chamber and its outside is a pump-side driving chamber. A piston is assembled to the cylinder and when the piston is reciprocated by a motor, the pump chamber is expanded and contracted. A gap between the piston and the cylinder is covered with a diaphragm, and an interior of the diaphragm is a seal space. Therefore, an incompressible medium having leaked from the gap between the piston and the cylinder enters into the seal space and does not leak to the outside.
    Type: Grant
    Filed: September 6, 2011
    Date of Patent: March 19, 2013
    Assignee: Koganei Corporation
    Inventor: Takeo Yajima
  • Patent number: 8382445
    Abstract: An air logic controller for increasing the efficiency of an air operated double diaphragm pump. The air logic controller may increase the efficiency of the pump by controlling the supply of compressed fluid to the pump. In one embodiment, the air logic controller may control the supply of compressed fluid to the pump by replacing the continuous, large volume supply of compressed fluid supplied to conventional air operated pumps during a single pumping stroke with a varied supply of compressed fluid. The varied supply of compressed fluid may comprise a supply of compressed fluid that alternates between a large volume supply and a small volume supply of compressed fluid. The air logic controller may vary the supply of compressed fluid to the pump based at least partially on the position of a main air valve spool and the setting on an adjustable pneumatic time delay relay.
    Type: Grant
    Filed: December 16, 2009
    Date of Patent: February 26, 2013
    Assignee: Warren Rupp, Inc.
    Inventor: David Roseberry
  • Patent number: 8047814
    Abstract: A chemical liquid supplying apparatus which can discharge chemical liquid with high accuracy is provided. The apparatus is used to discharge the chemical liquid in a chemical liquid tank from an application nozzle. The apparatus has a combined member formed integrally with a pump case and a cylinder, and a flexible tube serving as a pump member is provided in the pump case, wherein its inside is a pump chamber and its outside is a pump-side driving chamber. A piston is assembled to the cylinder and when the piston is reciprocated by a motor, the pump chamber is expanded and contracted. A gap between the piston and the cylinder is covered with a diaphragm, and an interior of the diaphragm is a seal space. Therefore, an incompressible medium having leaked from the gap between the piston and the cylinder enters into the seal space and does not leak to the outside.
    Type: Grant
    Filed: September 14, 2007
    Date of Patent: November 1, 2011
    Assignee: Koganei Corporation
    Inventor: Takeo Yajima
  • Patent number: 7775776
    Abstract: A single conduit lift pump is disclosed that only requires a single fluid conduit for both the driving fluid and the pumping action of the pump in a well bore. Fluid pressure communicated to the pump by the single fluid conduit drives the pump to load a resilient member. The fluid pressure is cycled off to allowing the lift of fluid by action of the resilient member upon the single fluid conduit. The single fluid conduit makes this pump suitable for downhole operations for the oil and gas production industries in wells that have substantial water cut that inhibits the production of gas.
    Type: Grant
    Filed: August 11, 2006
    Date of Patent: August 17, 2010
    Assignee: BJ Services Company, U.S.A.
    Inventor: Jeffrey L. Bolding
  • Patent number: 7665974
    Abstract: A hydraulically driven pump includes a diaphragm, a piston, a transfer chamber, a fluid reservoir, and a valve spool. The transfer chamber is defined between the diaphragm and piston and is filled with a hydraulic fluid. The fluid reservoir is in fluid communication with the transfer chamber via at least one valve. The valve spool is configured to control fluid flow between the transfer chamber and the fluid reservoir. The valve spool is movable to open and close an opening into the at least one valve only when an overfill condition or an underfill condition exists in the transfer chamber. The valve spool is moveable along an axis that is non-coaxial with an axis of movement of the diaphragm.
    Type: Grant
    Filed: May 2, 2007
    Date of Patent: February 23, 2010
    Assignee: Wanner Engineering, Inc.
    Inventor: Richard D. Hembree
  • Patent number: 7575419
    Abstract: A fuel pump for an internal-combustion engine; the fuel pump is provided with: a variable-volume chamber for containing fuel; an intake valve connected to the variable-volume chamber; a delivery valve connected to the variable-volume chamber; and a pumping device for varying the volume of the first variable-volume chamber. The intake valve has a disk provided with a plurality of through supply holes, and a deformable lamina, which is fixed to the disk in a position corresponding to a peripheral edge thereof and is provided with a series of flaps, each of which is coupled to a respective supply hole.
    Type: Grant
    Filed: May 19, 2006
    Date of Patent: August 18, 2009
    Assignee: Magneti Marelli Powertrain S.p.A.
    Inventors: Massimo Mattioli, Paolo Pasquali, Luigi Gagliardi
  • Patent number: 7488159
    Abstract: Gas compression system comprising a compression cylinder having a gas inlet, a compressed gas outlet, and one or more liquid transfer ports; a pump having a suction and a discharge; and a compressor liquid. The system also includes any of the following: a pressure intensifier having an inlet in flow communication with the pump and an outlet in flow communication with the compression cylinder; a feed eductor in flow communication with the discharge of the pump, with a reservoir containing a portion of the compressor liquid, and with the compression cylinder; a drain eductor in flow communication with the discharge of the pump, with the compression cylinder, and with a reservoir containing a portion of the compressor liquid; and a variable-volume compressor liquid accumulator in flow communication with the discharge of the pump.
    Type: Grant
    Filed: June 25, 2004
    Date of Patent: February 10, 2009
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Bharat Lajjaram Bhatt, William Curtis Kottke, David Jonathan Chalk, Todd Eric Carlson
  • Publication number: 20080118376
    Abstract: A novel method of designing a pump by utilizing a cylinder with pistons inserted from each end. The cylinder contains two ports along the top for connection of a prime fluid chamber, a bulk fluid supply chamber and a fluid reservoir. These ports and corresponding connection details are arranged in a fashion that is perpendicular to the axis of the cylinder that comprises the pump chamber. Directly below at a different relative position also perpendicular to the axis of the pump chamber is an exit port for extrusion of fluid. The pump contains no valves or ancillary passages to direct flow between the different machine states of prime, refill, translate and dispense. The states are activated by relative position of the pistons with respect to each port. Fluid moves by translation within the pump by filling the chamber volume between the two pistons with a liquid and synchronizing the advance of the left piston with the retreat of the right piston.
    Type: Application
    Filed: November 17, 2007
    Publication date: May 22, 2008
    Inventor: Brian Leonard Verrilli
  • Patent number: 7168928
    Abstract: An air driven hydraulic pump includes two opposed cylinders to either side of a center section. Two pneumatic pistons are slidable in the opposed cylinders and are coupled with one another by a common shaft extending through the center section. The pneumatic pistons ride in the opposed pneumatic cylinders and include hydraulic plungers extending therefrom. Cylinder heads integral with the cylinders provide hydraulic cylinders aligned with the hydraulic plungers. An air valve delivers pneumatic pressure to alternate sides of both pneumatic pistons such that the forces on the pistons are additive alternately in each direction.
    Type: Grant
    Filed: February 17, 2004
    Date of Patent: January 30, 2007
    Assignee: Wilden Pump and Engineering LLC
    Inventors: Todd M. West, Dennis E. Kennedy
  • Patent number: 7090474
    Abstract: A diaphragm pump which overcomes the problem of diaphragm failure due to overfill of the oil transfer chamber. An overfill preventive element in the form of a mechanical stop, a fully closed coil spring, or a valve system, or alternatives are provided.
    Type: Grant
    Filed: May 16, 2003
    Date of Patent: August 15, 2006
    Assignee: Wanner Engineering, Inc.
    Inventors: Kenneth Eugene Lehrke, Richard D. Hembree
  • Patent number: 7004731
    Abstract: A scarred surface structure on the cover curvature of a diaphragm compressor is created by shot blasting. The scarred surface structure hinders the sealing effect between the cover curvature and the diaphragm and thereby counteracts the formation of gas cushions.
    Type: Grant
    Filed: March 4, 2003
    Date of Patent: February 28, 2006
    Inventor: Horst Kleibrink
  • Patent number: 6899530
    Abstract: A diaphragm pump which overcomes the problem of diaphragm failure due to overfill of the oil transfer chamber and the inability to self-prime. A notch is provided in the upper portion of the surface of the cylinder so that air can be forced back to the reservoir. In addition, the bias spring connected to the diaphragm and supported by the piston is made stiff with a spring constant that produces a bias pressure that can overcome abnormal suction pressures.
    Type: Grant
    Filed: October 31, 2002
    Date of Patent: May 31, 2005
    Assignee: Wanner Engineering, Inc.
    Inventors: Kenneth Eugene Lehrke, Richard D. Hembree
  • Patent number: 6846166
    Abstract: In a reciprocating pump, drive power of a drive-power supply member is transmitted to a diaphragm within a diaphragm drive chamber via operating fluid. An operating-fluid-flow regulation chamber for regulating the flow of operating fluid is located between the drive-power supply member and the diaphragm drive chamber. A first gas discharge member and a second gas discharge member are respectively located in an upper part of the inside of the operating-fluid-flow regulation chamber and an upper part of the inside of the diaphragm drive chamber. The first gas discharge member is held in fluid communication with the second gas discharge member so as to constitute a single gas discharge mechanism. This single gas discharge mechanism is provided with a reverse-flow prevention member for preventing a reverse flow of fluid from the first gas discharge member to the second gas discharge member.
    Type: Grant
    Filed: October 22, 2002
    Date of Patent: January 25, 2005
    Assignee: Tacmina Corporation
    Inventor: Shigehisa Kinugawa
  • Patent number: 6767189
    Abstract: A method for the control and regulation of the oil pressure-gas pressure relationship of diaphragm compressors. The function of a diaphragm compressor is mainly dependent on a given minimum relationship of gas pressure and oil pressure. When this is undershot a large direct damage or long term damage can result. Also there exists operating conditions with very different gas pressures for which the maintenance of a given predetermined relationship between gas pressure and oil pressure is of large advantage. The solution of the invention lies in the capture of the oil pressure-gas pressure relationship with an electronic pressure sensor on the oil side of the diaphragm head and another electronic pressure sensor on the gas outlet side of the diaphragm head, with an associated electronic evaluation circuit for both of the signals for determining from those signals the relationship of the two pressures as well as for producing a signal output upon the undershooting of a given minimum relationship.
    Type: Grant
    Filed: August 2, 2002
    Date of Patent: July 27, 2004
    Inventor: Horst Kleibrink
  • Patent number: 6736611
    Abstract: An aircraft fluid delivery device (10) including a piston assembly (20), a pilot assembly (22), and a control assembly (24). The control assembly (24) includes non-contact proximity sensors (S1, S2) that sense the position of the piston (28) and a controller (80) that controls the pilot assembly (22), and thus the piston assembly (20), based on information received from the sensors (S1,S2). Specifically, the controller (80) energizes a solenoid (72) to cause fluid to flow through the pilot assembly (22) into a large portion of the piston chamber (30) during the compression stroke of the piston (28). When the solenoid (72) is deenergized during the return stroke of the piston (28), or when the delivery device is electrically turned off, an ejector (60) in the pilot assembly (22) generates a vacuum on the pressure side of the wide portion of the piston chamber (30).
    Type: Grant
    Filed: October 23, 2001
    Date of Patent: May 18, 2004
    Assignee: Goodrich Corporation
    Inventors: James Putt, Michael M. Kugelman
  • Patent number: 6547537
    Abstract: Three or more diaphragm pumps (12,14,16) are interconnected to sequentially receive an activation fluid from corresponding piston and cylinder pumps (18,20,22) synchronized by a control mechanism (24) which includes a distributor plate (42) with directive shallow slots (80,82,84) for conduiting activation fluid to a porting plate (44) and via openings (60,62,64) to the piston and cylinder pumps (18,20,22).
    Type: Grant
    Filed: April 5, 2002
    Date of Patent: April 15, 2003
    Inventor: Lawrence P. Olson
  • Publication number: 20020044874
    Abstract: Method and apparatus for optimizing the oil flow inside of a diaphragm compressor concerns the previously non-organized oil flow in the head of a diaphragm compressor leading to the previous formation of pockets between the diaphragm and the cover curve, the method and apparatus providing a continuous circulation of oil in the pressure stroke and in the suction stroke which is achieved by means of a valve plate which in the pressure stroke of the piston closes holes in the middle area of the aperture plate automatically and in the suction stroke of the piston again frees those holes automatically.
    Type: Application
    Filed: November 15, 2001
    Publication date: April 18, 2002
    Inventor: Horst Kleibrink
  • Patent number: 6276907
    Abstract: A diaphragm pump for pumping a fluid, such as paint, includes a diaphragm separating a first chamber for accommodating and dispensing the paint from a second chamber for accommodating a drive fluid, and a piston that reciprocates to drive the drive fluid within the second chamber in order to flex the diaphragm to provide the pumping action within the first chamber. The diaphragm pump also includes a backing ring mounted adjacent the diaphragm that is configured to distribute the drive fluid across the diaphragm to cause a flexible region of the diaphragm to flex toward the first chamber from the outer perimeter inward toward a central pumping surface in a rolling manner. This diaphragm movement results in substantially all of the paint adjacent the diaphragm within the first chamber to move out of the first chamber when the diaphragm reaches its travel limit, and thus improves the efficiency of the diaphragm pump.
    Type: Grant
    Filed: August 12, 1999
    Date of Patent: August 21, 2001
    Assignee: Wagner Spray Tech Corporation
    Inventors: Robert D. Cooper, Thomas F. Kruzel, Shawn C. Johnson, Wayne M. Bekius
  • Patent number: 6203289
    Abstract: Pumping system for pumping fluids at low pressure comprising a pumping enclosure connected to a pipe 16 introducing the fluid to be pumped and a pipe 18 discharging the pumped fluid. The enclosure is connected to a pipe introducing a drive fluid and a reducer (P1, P2) of the drive fluid pressure transmitted to the pumped fluid.
    Type: Grant
    Filed: June 9, 1998
    Date of Patent: March 20, 2001
    Assignee: Institut Francais du Petrole
    Inventors: Yvon Castel, Jacques Corteville
  • Patent number: 6178951
    Abstract: An injection pump comprises several modules in a housing. Each module has a chamber supplying an injection circuit, separated by a deformable diaphragm from a compartment defined by a bore of the housing and by a reciprocating piston. The chamber is connected to a fuel supply and is connected to the injection circuit by a non-return valve. The pressures of the liquid in each compartment are adjusted independently. All pistons are driven by a same cam.
    Type: Grant
    Filed: February 11, 2000
    Date of Patent: January 30, 2001
    Assignee: Sagem SA
    Inventors: Jean Doreau, Michel Poirier, J{acute over (e)}r{circumflex over (o)}me Piaton
  • Patent number: 6113361
    Abstract: A fuel pump, a fuel-pressure intensifier sub-assembly and a method of producing intensified high-pressure fuel are disclosed. The pump has a metered fuel circuit, a plurality of low-pressure bores with low-pressure plungers disposed therein, an intensifier bore with a piston disposed therein, a resilient bias member acting on the piston, a high-pressure bore with a high-pressure plunger at least partially disposed therein and a fuel outlet port. The pump operates in alternating fuel-in-take and fuel-pumping phases of operation under the influence of a rotary drive shaft with a cam and cooperating cam followers. By selecting the pumping surface areas of the low-pressure plungers and the high-pressure plunger, it is possible to select the fuel-pressure generated by the fuel pump.
    Type: Grant
    Filed: February 2, 1999
    Date of Patent: September 5, 2000
    Assignee: Stanadyne Automotive Corp.
    Inventor: Ilija Djordjevic
  • Patent number: 6099269
    Abstract: A device for pumping an absorbent solution from the low pressure side of an absorption heat exchange system to the high pressure side of that system without relying on pressure from the low pressure side. The device preferably includes a diaphragm pump disposed in an absorbent fluid pathway to pull absorbent solution from the low pressure side and to push absorbent solution into the high pressure side. The diaphragm of the diaphragm pump is powered by a piston-driven hydraulic pump which pushes and pulls oil into and out of the diaphragm pump. The hydraulic pump preferably has sufficient power to pull absorbent solution from the low pressure side of the heat exchange system without relying on any pressure from the low side. Check valves are used to permit the one-way flow of absorbent solution from the low pressure side to the high pressure side of the system.
    Type: Grant
    Filed: October 6, 1997
    Date of Patent: August 8, 2000
    Assignee: Fin Robur
    Inventors: Marco Guerra, Benito Guerra
  • Patent number: 5860793
    Abstract: A new and improved diaphragm metering pump is provided with a modular removable drive assembly. The removable drive assembly provides rotation to an eccentric shaft within the pump and is disposed outside rotary bearings for the eccentric shaft and outside sealing elements containing hydraulic fluid in the pump housing. In a preferred embodiment, a readily accessible mechanically activated hydraulic refill valve cartridge is provided to hydraulically balance the diaphragm. In a preferred embodiment, a push to prime air bleeder valve is provided permitting automatic priming of the hydraulic system without requiring disconnection of any valves. The pump is designed to interchangeably receive a number of diaphragm assemblies including an improved leak detection diaphragm and a double-sided leak detection diaphragm. In a preferred embodiment, a diagnostics window is provided permitting visual inspection of the operating condition of various valves connected to the hydraulic system.
    Type: Grant
    Filed: April 30, 1996
    Date of Patent: January 19, 1999
    Assignee: Pulsafeeder, Inc.
    Inventors: Stephen B. Muscarella, Philip T. Pascoe, Francis J. Snyder
  • Patent number: 5730506
    Abstract: A space-saving vibration damper that functions reliably for a long term. The vibration damper has a housing that includes at least one concave recess which is sealed by a disk-shaped diaphragm comprising a spring steel sheet. The diaphragm is connected by its edge to a planar surface of the housing by means of material-to-material bonding. The housing has, at the edge of the recess, a rounding that changes over continuously into both the recess and the planar housing surface toward the diaphragm. The hollow chamber disposed between the diaphragm and the recess is filled with air. The vibration damper is designed for use in slip-controlled hydraulic brake systems for a vehicle.
    Type: Grant
    Filed: November 27, 1996
    Date of Patent: March 24, 1998
    Assignee: Robert Bosch GmbH
    Inventors: Michael Friedow, Martin Maier
  • Patent number: 5667368
    Abstract: A new and improved diaphragm metering pump is provided with a modular removable drive assembly. The removable drive assembly provides rotation to an eccentric shaft within the pump and is disposed outside rotary bearings for the eccentric shaft and outside sealing elements containing hydraulic fluid in the pump housing. In a preferred embodiment, a readily accessible mechanically activated hydraulic refill valve cartridge is provided to hydraulically balance the diaphragm. In a preferred embodiment, a push to prime air bleeder valve is provided permitting automatic priming of the hydraulic system without requiring disconnection of any valves. The pump is designed to interchangeably receive a number of diaphragm assemblies including an improved leak detection diaphragm and a double-sided leak detection diaphragm. In a preferred embodiment, a diagnostics window is provided permitting visual inspection of the operating condition of various valves connected to the hydraulic system.
    Type: Grant
    Filed: April 30, 1996
    Date of Patent: September 16, 1997
    Assignee: Pulsafeeder, Inc.
    Inventors: Craig L. Augustyn, Francis J. Snyder
  • Patent number: 5641270
    Abstract: A magnetostrictive pump is provided which makes use of a magnetostrictive element which, when an alternating magnetic field is applied to it, compresses a chamber containing a working fluid. A bellows located within the working fluid is repeatedly compressed by the compression of the chamber, and pumps a fluid to be pumped in and out of the bellows. Since the magnetostrictive element does not directly contact the bellows, the bellows life is greatly extended. Valves are provided to direct the fluid flow in a desired manner. The pump may be combined with other pumps in various series or parallel arrangements to create a pump system. The pump may be pre-biased to make its response more linear by either mechanical or magnetic biasing. A permanent magnet may be used to magnetically bias the pump and create an "at-rest" initial extension of the magnetostrictive element. Similarly, a spring may be used to mechanically load the magnetostrictive element.
    Type: Grant
    Filed: July 31, 1995
    Date of Patent: June 24, 1997
    Assignee: Waters Investments Limited
    Inventors: George E. Sgourakes, Joseph F. Actor, Richard L. Vigeant, Carlton H. Paul
  • Patent number: 5421710
    Abstract: A fuel injection apparatus which, when raising fuel of a low viscosity and a low lubricating ability such as gasoline or methanol to a high pressure by a fuel injection pump and injecting it into a combustion chamber of an internal combustion engine etc., prevents the lubricating oil for the fuel injection pump from being diluted by this fuel by pressurizing a separate working oil with a viscosity and lubricating ability higher than the fuel by the fuel injection pump and raising the pressure of the fuel by a diaphragm apparatus by the pressure of the high pressure working oil and thereby supplies the same to the fuel injector.
    Type: Grant
    Filed: October 1, 1993
    Date of Patent: June 6, 1995
    Assignee: Nippon Soken Inc.
    Inventors: Hiroshi Yorita, Toshihiko Igashira, Yasuyuki Sakakibara, Kou Otsuka, Shigeiku Enomoto, Moriyasu Gotoh
  • Patent number: 5336320
    Abstract: A film coater for applying a coating material to selected areas on a target substrate, such as a printed circuit board, having a vented dispenser body with a plunger moveable therein between an open and closed position. A flow of pressurized air which moves the plunger to the open position is controlled by a valve carried by the dispenser body, and a plurality of springs return the plunger to the closed position. The number of return springs is selected to provide a variable biasing force so that movement of the plunger is controlled to eliminate or at least significantly reduce hammering, tapering and drooling, particularly when the dispenser is operated intermittently.
    Type: Grant
    Filed: June 30, 1992
    Date of Patent: August 9, 1994
    Assignee: Nordson Corporation
    Inventors: Patrick T. Hogan, James J. Turner
  • Patent number: 5249932
    Abstract: A diaphragm metering pump having control over diaphragm extension is described. A position sensor is incorporated in a diaphragm metering pump to indicate the relative position of the diaphragm during flexure. When excessive extension of the diaphragm is sensed by the position sensor, a control valve will provide hydraulic fluid from a reservoir for inhibiting further deflection of the diaphragm in the direction in which it was moving. Diaphragm life is extended as well as the accuracy of metering provided by the pump maintained.
    Type: Grant
    Filed: October 7, 1991
    Date of Patent: October 5, 1993
    Inventor: Erik Van Bork
  • Patent number: 5165869
    Abstract: A piston-driven fluid pump including a drive chamber containing drive fluid and a drive diaphragm forming a wall of the drive chamber. The pump also includes a spill containment chamber disposed adjacent the drive chamber and containing drive fluid, with a pumping diaphragm forming a wall of the spill containment chamber. A pump chamber assembly is disposed adjacent the fluid containment chamber, and is in fluid communication with a source of fluid to be pumped. A selectively actuable piston pressurizes the drive fluid in the drive chamber, and a pressure compensation device, disposed in fluid communication with the drive chamber, provides selectively variable pressure relief to the drive chamber.
    Type: Grant
    Filed: February 10, 1992
    Date of Patent: November 24, 1992
    Assignee: Warren Rupp, Inc.
    Inventor: Steven M. Reynolds
  • Patent number: 5145331
    Abstract: In a diaphragm or membrane pump, the diaphragm thereof is composed of two diaphragm disks arranged at an axial distance from one another and enclosing an interior space whose size is variable given damage to one of the diaphragm disks. Further, a signal generator is arranged in that diaphragm disk facing toward the conveying chamber and a signal pick-up is arranged in the pump housing, this signal pick-up being connected to a means for the electronic evaluation and amplification of the signals output by the signal pick-up. This embodiment makes it possible to recognize a potential damage to the diaphragm early and to thus reliably prevent hydraulic medium from proceeding into the conveyed medium.
    Type: Grant
    Filed: July 29, 1991
    Date of Patent: September 8, 1992
    Assignee: J. Wagner GmbH
    Inventors: Wilfried Goes, Gerhard Gebauer
  • Patent number: 5032063
    Abstract: Hydraulic fluid is replenished in a pulsator chamber of a fluid driven pulsator pump by having the power plunger in an upstanding bore with spaced seals. The power plunger is withdrawn upon each stroke vertically upward. As it is withdrawn past seals, any gas within the pulsator chamber may be purged or bled into an annular space and there out into a reservoir and scrubbing chamber. Additional hydraulic fluid will flow into the pulsator chamber. Upon the down stroke of the plunger an exact amount of volume will be displaced within the pulsator chamber. Adjustment of the product pumped on each stroke is by sacrificing a measured amount of the pulsator liquid into a sacrifice chamber. The amount of liquid which flows into the sacrifice chamber upon each down stroke and out of the chamber on each upstroke is adjusted by adjusting the movement of a floating piston by a micrometer rod.
    Type: Grant
    Filed: January 3, 1990
    Date of Patent: July 16, 1991
    Assignee: Y-Z Industries, Inc.
    Inventors: Ted E. Zeck, Paul F. Zeck
  • Patent number: 4948349
    Abstract: A pump consists of a valve box in which a valve chamber inlet and outlet are each provided with a valve, and a reciprocating member in a cylinder that communicates with the valve chamber of the valve box to open the valves. A pressure action chamber is provided between the valve box and the cylinder and a pressure force member divides the pressure action chamber into a valve chamber side and a cylinder side. On the cylinder side of the pressure action chamber thus divided is an action medium that transmits to the pressure force member changes in the volume of the pressure action chamber produced by the action of the reciprocating member. A valve device consists of a concave valve seat and a number of fluid passages formed therein. Which open into the recess formed by the concave valve seat. Either the valve seat or the valve-piece is formed of, or covered with, a hard resilient material, or one is formed of the hard resilient material and the other is covered with a hard resilient material.
    Type: Grant
    Filed: September 21, 1988
    Date of Patent: August 14, 1990
    Assignees: Yoshinobu Koiwa, Kabushiki Kaisha Little Rock, Kelbin Co., Ltd., Shuichi Fujimori
    Inventor: Yoshinobu Koiwa
  • Patent number: 4887984
    Abstract: A fluid coupling is provided in a marine drive between the engine and the propulsion unit. The fluid coupling includes a fluid pump connected to the flywheel of the engine, and a turbine connected to an output shaft leading to the propulsiion unit. A series of vanes are provided between the fluid pump and the turbine, to direct the flow of fluid from the fluid pump to the turbine. The vanes between the pump and the turbine are movable to control the direction of impingement of fluid on the turbine, to regulate the speed and/or direction of rotation of the turbine relative to the speed and direction of rotation of the fluid pump.
    Type: Grant
    Filed: October 11, 1988
    Date of Patent: December 19, 1989
    Assignee: Brunswick Corporation
    Inventor: Neil A. Newman
  • Patent number: 4865528
    Abstract: In a diaphragm pump, which is provided with at least one diaphragm (1), which separates a delivery chamber (4) from a pressure chamber (5) filled with an hydraulic fluid and is clmaped at its edge between the pump body (2) and a pump cover (3), and with an hydraulic diaphragm drive in the form of an oscillating displacement piston (6), which is displaceable in the pump body (2) between the pressure chamber (5) and a storage chamber (7) for the hydraulic fluid, a method as well as an arrangement for starting under load is provided. For this purpose on the pump drive side between the pressure chamber (5) and the storage chamber (7) a connection channel (20) is provided.
    Type: Grant
    Filed: March 18, 1988
    Date of Patent: September 12, 1989
    Assignee: Lewa Herbert Ott GmbH & Co.
    Inventors: Horst Fritsch, Josef Jarosch
  • Patent number: 4828464
    Abstract: In a diaphragm pump including a first chamber for liquid to be pumped separated from a second chamber for drive fluid by a diaphragm which is driven by a piston alternatively placing the drive fluid under pressure and releasing the pressure from the drive fluid, a signal generator or magnet is located in the diaphragm while a signal detector is located within the pump housing to enable detection of displacement of the diaphragm and, accordingly, the displaced volume of the diaphragm pump. Detection of the displaced volume is used by a regulator to generate a drive signal which, in turn, is used to drive a motor operator connected to a pressure relief valve to control drive fluid pressure and, accordingly, the displaced volume.
    Type: Grant
    Filed: February 26, 1988
    Date of Patent: May 9, 1989
    Assignee: J. Wagner GmbH
    Inventors: Martin Maier, Heinz Sayer, Gerhard Gebauer
  • Patent number: 4799355
    Abstract: The present specification discloses a brake actuation system for a vehicle, which is applicable to both hydraulically or pneumatically operated/spring released brakes and spring operated/hydraulically or pneumatically released brakes. With such brakes it is often necessary to have secondary means for brake operation or release. Such braking systems thus have primary and secondary means for brake operation or release. The present invention provides a fail-safe system which can provide at least an indication of impending failure. The brake actuation system of the present invention comprises a cylinder within which two axially aligned pistons are axially slidable, the space between one end of the cylinder and one piston being connected to a primary power system and the space between said pistons being connected to a secondary power system.
    Type: Grant
    Filed: August 8, 1986
    Date of Patent: January 24, 1989
    Assignee: Lucas Industries public limited company
    Inventor: Anthony W. Harrison
  • Patent number: 4789313
    Abstract: A technique for pumping an output fluid, especially a particle-laden abrasive liquid. This technique utilizes an output pump and a drive pump which are interconnected through a common chamber containing a drive fluid, specifically water. The output pump includes an output piston within its own pumping chamber for pumping the output liquid by causing the output piston to move through a complete forward stroke. The drive pump includes a drive piston within its own chamber and means for causing the output piston to move the drive piston through its own complete forward stroke. This pressurizes the drive fluid within the common chamber in a way which causes the output piston to move in the forward direction of its stroke. The two pumps are configured such that the forward stroke of the drive piston defines a greater swept volume than the forward stroke of the output piston, thereby to ensure that the output piston will always move through its entire forward stroke before the drive piston.
    Type: Grant
    Filed: April 8, 1987
    Date of Patent: December 6, 1988
    Assignee: FlowDrill Corporation
    Inventors: Timothy M. Tower, James M. Reichman, Paul D. Harold
  • Patent number: 4594057
    Abstract: An injector pump for introducing metered amounts of fluid into a process line which pump typically is actuated by a gas powered timing relay. A diaphragm or other impermeable member mounted in the pump housing defining a pump chamber for the fluid to be pumped and a piston chamber for a piston having a plunger sliding in a plunger guide to define a pressure chamber between the plunger and the diaphragm. A high pressure seal is carried in the plunger guide to provide sealing about the plunger when there is a high pressure in the pressure chamber, while permitting leakage along the plunger when there is a low pressure in the pressure chamber, thereby providing for pumping of measured amounts of fluid which may be under high pressure and/or highly corrosive, while maintaining isolation between the pump mechanism and the fluid.
    Type: Grant
    Filed: June 10, 1985
    Date of Patent: June 10, 1986
    Assignee: Morgan Products, Inc.
    Inventor: Morris E. Morgan
  • Patent number: 4564340
    Abstract: A device for regulating in a practically loss-free manner the pressure and feed volume of a diaphragm pump which is constructed as a hydraulically activatable diplacement pump and is especially suited for feeding a viscous and abrasive or a solids-laden secondary fluid medium. In the device, access is required only to the environment of the primary working fluid medium, and no direct interchanges between the secondary medium being fed and parts of the control device are required. During the pressure phase of the diaphragm pump, a limited quantity of the primary working medium is extracted from a portion of the housing of the device which is in direct and uninterrupted communication with the associated working section, while during the suction phase and in dependence on the overpressure of the primary working fluid medium in the device a compensation is made for the quantity of the primary working fluid medium lost during the pressure phase.
    Type: Grant
    Filed: November 13, 1984
    Date of Patent: January 14, 1986
    Assignee: Abel Pumpen GmbH
    Inventor: Friedrich R. R. Stahlkopf
  • Patent number: 4560324
    Abstract: The automatic purger has an intermediate chamber (11) one of the walls of which is formed by an elastic diaphragm (10), termed front diaphragm, whereas the other wall is formed by a second elastic diaphragm (12), termed rear diaphragm. This chamber is connected to a purger (20) formed by a body (21) defining a small internal enclosure (22) in which an element (25), which is highly permeable to the gas, is disposed. The invention is applicable to a hydraulically controlled or actuated pump of the reciprocating or displacement type.
    Type: Grant
    Filed: May 23, 1985
    Date of Patent: December 24, 1985
    Assignee: Clextral
    Inventor: Francois P. Durieux
  • Patent number: 4558567
    Abstract: A continuously variable transmission (2) is constructed utilizing a constant displacement pump (4) of fixed fluid power stroke, rather than a variable displacement pump with a variable pump stroke. A fluid motor (14) is driven by the pump and has an output stroke. Means (22) are provided for varying the output stroke without varying the input power stroke.
    Type: Grant
    Filed: April 20, 1984
    Date of Patent: December 17, 1985
    Assignee: Eaton Corporation
    Inventor: Herman P. Schutten