Pressure Responsive Patents (Class 417/388)
  • Patent number: 10030789
    Abstract: There is provided a diaphragm valve capable of reliably detecting damage to a diaphragm before breakage of the diaphragm in spite of the simple structure. A diaphragm includes a plurality of diaphragm layers. The uppermost diaphragm layer is provided with wiring. An abnormality of the diaphragm is detected by detecting breakage of the wiring.
    Type: Grant
    Filed: May 12, 2014
    Date of Patent: July 24, 2018
    Assignee: FUJIKIN INCORPORATED
    Inventors: Tsutomu Shinohara, Michio Yamaji, Kouji Nishino, Ryousuke Dohi, Nobukazu Ikeda, Toshio Doh
  • Patent number: 9739274
    Abstract: A precision pump system having a motor driver for accurately and repeatedly delivering process fluid, (e.g., photo chemicals) using a pumping fluid with minimal process fluid loss to a fabrication process and whereby the motor driver can be easily and quickly replaced without interrupting the fluid flow path. This is accomplished with the use of a process fluid reservoir and a pumping fluid reservoir that are associated with the pump, either integrated with the pump or closely adjacent. In addition, this precision pump system can be remotely monitored, viewed and controlled over the Internet. In addition, trapped process fluid within a downstream filtering block can be recirculated to the process fluid reservoir when trapped gas in the filter is removed. Furthermore, a nitrogen gas source is connected to the process fluid reservoir via a valve in case a need to insert a gas is required.
    Type: Grant
    Filed: March 10, 2014
    Date of Patent: August 22, 2017
    Assignee: INTEGRATED DESIGNS, L.P.
    Inventors: John C. Vines, John Laessle
  • Patent number: 9616435
    Abstract: A self-cleaning sprinkler is disclosed, generally comprised of an upper and lower housing, which encase a nozzle and a diaphragm. The diaphragm moves in an upward and downward position relative to the nozzle, which allows water located within a chamber to be expelled out of an exit aperture of the nozzle. A needle is secured within the diaphragm to correspondingly move in an upward and downward position, such that once in a closed position, the needle will penetrate the exit aperture of the nozzle in order to clean any debris that may have accumulated therein. The diaphragm moves in from a closed position to an open position depending on the incoming water pressure.
    Type: Grant
    Filed: May 27, 2015
    Date of Patent: April 11, 2017
    Assignee: RHIZA IRRIGATION LTD.
    Inventors: Kenji Smith, Kiyoshi Smith, Kevin Bailey, Matthew Bailey, Duncan J. Gibbons, John Kim, Patrick Williams
  • Patent number: 9562648
    Abstract: An improved system, apparatus and method for injecting a chemical from a storage tank into a natural gas or liquefied petroleum gas pipeline at a flow-controlled injection rate is provided. The system, apparatus and method including a pair of positive-displacement pumps driven in substantially complementary fashion by a single driver, a controller controlling the driver, and each pump being fed from the storage tank and discharging chemical into the pipeline. The system, apparatus and method may also include a second pair of positive-displacement pumps having substantially similar displacement and operatively connected to the first pair of positive-displacement pumps, the first pair of positive-displacement pumps being driven in a substantially complementary fashion with the second pair of pumps by a single driver or a pair of drivers.
    Type: Grant
    Filed: February 10, 2016
    Date of Patent: February 7, 2017
    Assignee: Linc Energy Systems, Inc.
    Inventors: Jay L. Kristola, Michael D. Farrell, David J. Nowak
  • Patent number: 9371827
    Abstract: A hydraulically-controlled diaphragm pump having a pump head in which a first deformable diaphragm defines a pump chamber, a pump body that co-operates with the first diaphragm to define a hydraulic working chamber, and a piston mounted to move back and forth in the pump body so as to form a controlled movable wall of the working chamber. The movable wall also includes at least one second diaphragm secured to the piston head and to the body of the pump, and providing sealing for the working chamber.
    Type: Grant
    Filed: October 21, 2011
    Date of Patent: June 21, 2016
    Inventors: Rémy Lefebvre, Denis Deparrois
  • Patent number: 9261087
    Abstract: An improved system, apparatus and method for injecting a chemical from a storage tank into a natural gas or liquefied petroleum gas pipeline at a flow-controlled injection rate is provided. The system, apparatus and method including a pair of positive-displacement pumps driven in substantially complementary fashion by a single driver, a controller controlling the driver, and each pump being fed from the storage tank and discharging chemical into the pipeline. The system, apparatus and method may also include a second pair of positive-displacement pumps having substantially similar displacement and operatively connected to the first pair of positive-displacement pumps, the first pair of positive-displacement pumps being driven in a substantially complementary fashion with the second pair of pumps by a single driver or a pair of drivers.
    Type: Grant
    Filed: August 29, 2012
    Date of Patent: February 16, 2016
    Assignee: LINC ENERGY SYSTEMS, INC.
    Inventors: Jay L. Kristola, Michael D. Farrell, David J. Nowak
  • Publication number: 20150125318
    Abstract: A pump comprising a housing having a cavity and a diaphragm positioned therein configured to fluidly separate the cavity into a driving chamber and a fluid chamber. The pump further includes a port that connects the driving chamber to a vacuum source. The port configured to have an open state and a closed state such that a fluid enters the fluid chamber when the port is in the open state, and wherein the fluid exits the fluid chamber when the port is in the closed state.
    Type: Application
    Filed: November 3, 2014
    Publication date: May 7, 2015
    Applicant: ALLEGIANCE CORPORATION
    Inventors: Patrick Christopher Tetzlaff, Brian Thomas Leadingham
  • Publication number: 20150118078
    Abstract: A diaphragm pump includes a diaphragm cartridge assembly. The diaphragm cartridge is a self-contained unit having a diaphragm defining a pumped fluid side and a hydraulic fluid side and a seat receiving the hydraulic fluid side of the diaphragm and having a center opening. A biasing rod mounts to the diaphragm on the hydraulic fluid side and extending through the opening of the seat. A valve guide at an extended end of the biasing rod and a valve spool slidably mounts on the valve guide. A biasing element engages the seat and the valve guide. The pump may also include valve cartridges including a combined inlet check valve and discharge check valve.
    Type: Application
    Filed: October 31, 2014
    Publication date: April 30, 2015
    Inventor: Richard D. Hembree
  • Patent number: 8602750
    Abstract: A drive characteristic and durability of a liquid supply device having a flexible pump member such as a bellows are improved. A drive pump in the liquid supply device has a bellows as the pump member that is elastically deformed axially by a drive rod. A drive pump chamber and a communication chamber are formed by the bellows and the housing, and the communication chamber and the drive pump chamber are partitioned by the orifice member. At a drive operation time of the drive rod, the through hole is blocked by the valve member, and a liquid flows in between the communication chamber and the drive pump chamber via a communication gap formed between the orifice member and an inner circumferential face of the housing.
    Type: Grant
    Filed: April 8, 2011
    Date of Patent: December 10, 2013
    Assignee: Koganei Corporation
    Inventor: Toshio Takeishi
  • 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
  • Publication number: 20130101444
    Abstract: In a chemical liquid supplying apparatus 10a for discharging chemical liquid by expanding and contracting a pump chamber 16 which communicates with a chemical liquid inlet 21 and a chemical liquid outlet 22, the apparatus has a cylinder 12 in which a piston 31 is accommodated and reciprocally movable in an axial direction. A bellows 35 which is elastically deformable in the axial direction is mounted to a cylinder hole 30 between the tip of a connection rod 34 and the cylinder 12. On the inside of the bellows 35, an expanding/contracting chamber 37 is formed as a compartment between the connection rod 34 and the bellows 35, a pressure chamber 38 which communicates with the expanding/contracting chamber 37 is provided on the tip side of the piston 31, and an incompressible indirect medium 39 is enclosed in the expanding/contracting chamber 37 and the pressure chamber 38.
    Type: Application
    Filed: January 31, 2011
    Publication date: April 25, 2013
    Applicant: KOGANEI CORPORATION
    Inventor: Hiroyuki Muraoka
  • Patent number: 8137076
    Abstract: A method and a device for extracting a liquid from a liquid pond, wherein in a first phase air is removed from an airtight reservoir, a venting and a rising pipe in order to create depression therein and a suck-up of the liquid in the liquid pond. In a second phase, a distribution device is brought from a first to a second operating position in order to supply pressurized gas to said venting pipe which has an outlet connected to the rising pipe. In a third phase the liquid is pushed from the venting pipe to the rising pipe and thereafter to the reservoir by means of pressurized air and an interface member. In a fourth phase the distribution device is brought back to its first operation position.
    Type: Grant
    Filed: March 16, 2006
    Date of Patent: March 20, 2012
    Inventor: Francois Braun
  • Patent number: 7871250
    Abstract: A chemical liquid supplying apparatus can discharge chemical liquid with high accuracy and monitor a leakage of an incompressible medium from a region between a piston and a cylinder. A pump has a flexible tube for partitioning a pump chamber and a drive chamber, and the incompressible medium is supplied to the drive chamber by the piston reciprocating in a cylinder hole of the cylinder. A bellows cover is provided between the piston and the cylinder, and forms a seal chamber contiguous to a sliding face of the piston. A seal-chamber pressure sensor is attached to the cylinder so as to detect the pressure of the incompressible medium for sealing enclosed in the seal chamber, and a deterioration degree of a seal member is determined by detecting the pressure in the seal chamber.
    Type: Grant
    Filed: November 13, 2007
    Date of Patent: January 18, 2011
    Assignee: Koganei Corporation
    Inventor: Takeo Yajima
  • 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: 7654801
    Abstract: A diaphragm pump including, in a pump body, a hydraulic control chamber disposed between a piston for executing reciprocating motion and the diaphragm, the pump including elements for compensating leaks from the hydraulic chamber, the elements including a refilling duct opening out into the hydraulic chamber via a normally-closed compensation shutter that is driven into the open position by the diaphragm, wherein the above-mentioned compensation shutter being driven by the diaphragm pressing against a free end of a rod for controlling the shutter, the diaphragm being subjected to the force of a suction-assistance spring which co-operates with the above-mentioned shutter to return it to its closed position by pushing the free end of the control rod back towards the diaphragm, the spring co-operating with the shutter to form a moving assembly that is moved without being deformed by the diaphragm during suction overtravel.
    Type: Grant
    Filed: December 11, 2006
    Date of Patent: February 2, 2010
    Assignee: Milton Roy Europe
    Inventor: Gaetan Spude
  • Patent number: 7425120
    Abstract: A hydraulically driven pump includes a diaphragm, a piston, a transfer chamber, a fluid reservoir, and a spool member. 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 spool member is configured to control fluid flow between the transfer chamber and the fluid reservoir. The spool member 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.
    Type: Grant
    Filed: April 26, 2005
    Date of Patent: September 16, 2008
    Assignee: Wanner Engineering, Inc.
    Inventor: Richard D. Hembree
  • Patent number: 7311502
    Abstract: A method for supplying solvent to an ultra-high pressure liquid chromatography system using a hydraulic amplifier. The hydraulic amplifier system includes a hydraulic cylinder comprising a primary piston chamber in which a primary piston is disposed and a secondary piston chamber in which a secondary piston is disposed. The cross-sectional area of the primary piston is larger than the cross-sectional area of the secondary piston. The difference in the cross-sectional areas of the pistons creates an amplification of the pressure in the primary piston chamber and a reduction in flow rate.
    Type: Grant
    Filed: March 1, 2004
    Date of Patent: December 25, 2007
    Assignee: Waters Investments Limited
    Inventors: Geoff C. Gerhardt, Bruce J. Compton
  • 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: 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: 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: 6712587
    Abstract: A hydraulic amplifier system for an ultra-high pressure liquid chromatography system. The hydraulic amplifier system includes a hydraulic cylinder comprising a primary piston chamber in which a primary piston is disposed and a secondary piston chamber in which a secondary piston is disposed. The cross-sectional area of the primary piston is larger than the cross-sectional area of the secondary piston. The difference in the cross-sectional areas of the pistons creates an amplification of the pressure in the primary piston chamber and a reduction in flow rate.
    Type: Grant
    Filed: December 21, 2001
    Date of Patent: March 30, 2004
    Assignee: Waters Investments Limited
    Inventors: Geoff C. Gerhardt, Bruce J. Compton
  • Patent number: 6672841
    Abstract: The present invention relates to a pumping device for delivering and metering fluids, in particular medical fluids such as dialysis fluids, with a piston unit having a driving device and a piston and with a membrane unit which has a membrane and a first chamber bordered by the membrane. The pumping device also has a hydraulic unit which has a space to accommodate a hydraulic fluid which is connected to the piston of the piston unit and to the first chamber of the membrane unit. The reliability of metering by such a pumping device is increased by providing a control unit for guaranteeing a predefinable metering rate and/or quantity and also providing a measuring device by means of which the axial position of the piston unit can be determined directly and which can be connected to the control unit.
    Type: Grant
    Filed: November 18, 1999
    Date of Patent: January 6, 2004
    Assignee: Fresenius Medical Care Deutschland GmbH
    Inventors: Martin Herklotz, Hans-Peter Schneider, Jörg Bigalke, Rainer Dönig, Jürgen Häcker
  • Publication number: 20030031565
    Abstract: A method for the control and regulation of the oil pressure-gas pressure relationship of diaphragm compressors.
    Type: Application
    Filed: August 2, 2002
    Publication date: February 13, 2003
    Inventor: Horst Kleibrink
  • Patent number: 6439083
    Abstract: A tool or device is comprised of a generally cylindrical plunger that is retained in a generally cylindrical body. A spring fits inside the body to spring-load the plunger by means of a jam nut or other tensioning device. The plunger has tapped mounting holes with a pilot hole on the compression end for attaching various standard or custom components or attachments. The opposite tension end has a threaded extension also used for attaching devices. The body has a smooth outside diameter with at least one flat running the entire length. Due to the close fit of the plunger and body, the plunger has an axial groove on it upper surface to allow air inside the device to escape for smooth actuation. An optional splitclamp block is provided as a means of mounting. Also available as an option is a retracting lock.
    Type: Grant
    Filed: March 23, 2000
    Date of Patent: August 27, 2002
    Assignee: dbm Innovation, Inc.
    Inventor: Dean R. Molstad
  • 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: 6264437
    Abstract: A device enables the pumping of any kind of liquid while giving the liquid very high delivery pressure. The units that cause pumped liquid suction and then its delivery are driven exclusively by hydraulic means excluding mechanical means. So that there is no material contact between the driving units and the pumped product and that the product cannot damage the mechanical driving units, the chamber receiving the hydraulic fluid is, at the end of each compression cycle, placed again in direct communication with the hydraulic fluid reservoir.
    Type: Grant
    Filed: May 10, 1999
    Date of Patent: July 24, 2001
    Assignee: Hydro Rene Leduc
    Inventor: Louis-Claude Porel
  • Patent number: 6264436
    Abstract: A multifunction hydraulic valving apparatus includes a relief valve, a gas purge valve and a bleed valve disposed in a single bore.
    Type: Grant
    Filed: May 11, 1999
    Date of Patent: July 24, 2001
    Assignee: Milton Roy Company
    Inventors: Phillip M. Edwards, James K. Sutherland, Robert J. Meehan
  • Patent number: 6257850
    Abstract: A piston and seals for a reciprocating pump improve pumping of subterranean fluids containing fine solids to surface. The pump comprises a pump barrel and piston. The piston is suspended from a reciprocating rod string or from reciprocating production tubing. The barrel is held stationary relative to the casing of a well. A standing valve is located at the bottom of the barrel. The piston and travelling valve are located at the bottom of the piston rod for minimizing the dead-space between standing and travelling valves. Upper and lower stacks of hydraulic piston seal rings are positioned on the piston above and below the travelling valve for minimizing piston height. Each seal has radially flared lips at its leading edge. The piston has spaced grooves formed therein, corresponding to the seal ring flared lips.
    Type: Grant
    Filed: April 27, 2000
    Date of Patent: July 10, 2001
    Inventor: Kenneth S. Conn
  • Patent number: 6071089
    Abstract: A high pressure hydraulic diaphragm pump having a pressure chamber on one side of a diaphragm and a fluid delivery chamber on the other side of the diaphragm with a reciprocating piston assembly including a piston member being provided for pressurizing the hydraulic fluid in the pressure chamber and having the pressure chamber connected with a pressure regulator which maintains the desired discharge pressure of the fluid and in which the piston assembly is combined with a diaphragm positioning mechanism for maintaining the diaphragm at a desired position relative to the piston member so as to assure full stroke of the diaphragm during normal operation of the pump.
    Type: Grant
    Filed: February 20, 1998
    Date of Patent: June 6, 2000
    Assignee: General Motors Corporation
    Inventors: Eugen Maier, Michael Raymond Raney, Donald James Moran, Jeffrey Mark Noll
  • Patent number: 5899671
    Abstract: For a hydraulically driven diaphragm pump with a diaphragm consisting of at least two individual layers, these layers are clamped at least in their central area between a coupling part on the feed area side and the hydraulics area side and are thus mechanically linked with one another. The coupling parts are also connected with a relay valve of a leak replenishment system which is attached in the pump body in a moveable manner.
    Type: Grant
    Filed: June 19, 1997
    Date of Patent: May 4, 1999
    Assignee: Lewa Herbert Ott GmbH & Co.
    Inventor: Waldemar Horn
  • 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: 5810567
    Abstract: On a hydraulic diaphragm pump with a diaphragm including at least two individual layers, a dimensionally stable reinforcing element that moves together with the diaphragm and is kept in contact with the diaphragm is provided in the central area of the diaphragm. The inlet and outlet channels of the diaphragm pump open into the delivery chamber radially within the reinforcing element at least for the most part so the channels are covered accordingly by the reinforcing element.
    Type: Grant
    Filed: June 19, 1997
    Date of Patent: September 22, 1998
    Assignee: LEWA Herbert Ott GmbH & Co.
    Inventor: Waldemar Horn
  • 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: 5707219
    Abstract: A diaphragm pump is provided having a plurality of piston inlets connecting a hydraulic fluid source with the piston chamber and a plurality of check valves each having a ball and valve seat disposed within the inlets. The valve seat includes a conical section sloped such that the tangential contact point between the ball and valve seat is located at a position outward from the inner edge of the valve seat. The distance the ball is permitted to move between the open and closed positions is such that the check valve closes substantially in conjunction with the piston beginning its power stroke and the ball is not able to generate a high closure velocity. A diaphragm plunger includes a spherical surface portion designed to impact a diaphragm stop at a position away from the edges of the stop and plunger. An isolation reservoir is connected to a piston reciprocating chamber such that hydraulic fluid completely fills the piston reciprocating chamber and further flows into the isolation reservoir.
    Type: Grant
    Filed: October 4, 1995
    Date of Patent: January 13, 1998
    Assignee: Wanner Engineering
    Inventor: Frederick Allan Powers
  • Patent number: 5246351
    Abstract: In a hydraulically driven diaphragm pump, which is provided with a diaphragm clamped on the edge which separates a delivery chamber from a hydraulic chamber, the hydraulic chamber being subdivided into a diaphragm work chamber and a piston work chamber connected therewith via at least one connecting duct, a hydraulic diaphragm drive in the form of an oscillating displacement piston which is displaceable in the pump body between a reservoir for the hydraulic fluid and the piston work chamber, and with a diaphragm position-controlled leakage makeup device which comprises a control valve with a control slide displaceably guided in the zone of the connecting duct between diaphragm work chamber and piston work chamber, which slide opens--in the suction stroke end position of the diaphragm--a connection from the reservoir to the piston work chamber, the arrangement is made in such a way that the control slide (19) of the leakage makeup device is provided at its two ends with devices (31; 20) for stroke path limitat
    Type: Grant
    Filed: November 30, 1992
    Date of Patent: September 21, 1993
    Assignee: Lews Herbert Ott GmbH & Co.
    Inventors: Waldemar Horn, Roland Hessenberger
  • Patent number: 5192425
    Abstract: Single-piece manifold for use in pressurized painting equipment which is configured and arranged for joining a liquid inlet line, a pressure sensor, a filter, a pressure relief valve, and one or more liquid outlet lines by a streamlined network of passages in a compact and organized manner which eliminates static flow areas. The pressure sensor is assembled within the manifold in such manner as to avoid relative rotation between sensor components and thus avoid stressing electrical leads of the sensor.
    Type: Grant
    Filed: July 22, 1991
    Date of Patent: March 9, 1993
    Assignee: Wagner Spray Tech Corporation
    Inventors: Norman A. Cyphers, Dwaine D. Straight, Robert D. Cooper, Jr.
  • 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: 5163820
    Abstract: A pressure unloading valve responsive primarily to the pressure of the outlet passage in a diaphragm pump. The pump includes a driving fluid chamber and a pump chamber separated by a flexible diaphragm. Between the pump chamber and the outlet passage is a check valve allowing fluid flow only from the pump chamber to the outlet passage. The unloader valve is unseated, allowing relief of fluid pressure in the driving fluid chamber, when the pressure in the outlet passage exceeds a first predetermined value or when the pressure in the driving fluid chamber exceeds a second predetermined value. An adjustment knob is provided to vary the first and second predetermined values. An anti-blow-by seal is provided to check fluid seepage from the driving fluid chamber to the sump.
    Type: Grant
    Filed: July 19, 1991
    Date of Patent: November 17, 1992
    Assignee: Karldom Corporation
    Inventor: Rudolf R. Karliner
  • Patent number: 5106274
    Abstract: A high-pressure hermetic compressor suitable for use in a zero-gravity environment. The compressor includes a solenoid, driven by a power supply, which causes a plunger to reciprocate in an internal space filled with hydraulic fluid. Such motion pressurizes the hydraulic fluid causing a diaphragm to distort. The deformation of the diaphragm compresses fluid in a compression chamber.
    Type: Grant
    Filed: July 23, 1990
    Date of Patent: April 21, 1992
    Inventor: Mark Holtzapple
  • Patent number: 5069602
    Abstract: A low volume, hydraulic powered pump for attachment to small diameter, coiled tubing for pumping subsurface liquids from hydrocarbon formations. The pump is easily run into existing production well tubing by use of a coiled tubing unit and then connected to a power fluid pressuring apparatus. Power fluid actuates an actuator in the pump to pump liquids in the formation to the surface. The actuator has two piston heads connected by a connector rod which reciprocate in two separate chambers in the pump which are divided by a cross head seal member. A conduit in the actuator allows power fluid to be forced into the lower chamber to drive the actuator downward pumping subsurface liquids to the surface. Once the actuator completes its down stroke, pressure on the power fluid is released and the actuator is driven to its retract position by the hydrostatic pressure of the subsurface liquids pressing against the bottom surface of the upper piston head.
    Type: Grant
    Filed: September 26, 1990
    Date of Patent: December 3, 1991
    Inventor: Thomas C. Gipson
  • Patent number: 5059099
    Abstract: An integral cylinder liner and pump housing formed of a die cast aluminum workpiece of the type having a surface hardness extending a minimum depth into the workpiece, the housing further includng and integral pressure vessel and pressure control valve housing and fluid return path.
    Type: Grant
    Filed: August 8, 1990
    Date of Patent: October 22, 1991
    Assignee: Wagner Spray Tech Corporation
    Inventor: Norman A. Cyphers
  • Patent number: 4934906
    Abstract: A diaphragm pump especially suited for use in a high pressure application. The pump is devised to replenish any hydraulic fluid lost from a motor chamber, especially that fluid forced past the seals circumscribing a reciprocating plunger that is partially inserted into the motor chamber and is used as a means to alternately generate and release the high pressure that must be generated in the motor chamber to overcome the opposing high pressures existing in a pumping chamber containing a transient fluid. The motor chamber and the pumping chamber are separated by a diaphragm that is displaced according to the pressures in the motor chamber and the pumping chamber. Whenever the pressure generated in the motor chamber is such that the pressure in the pumping chamber is overcome, the pumping chamber shrinks in size and the transient fluid is expelled from the pumping chamber.
    Type: Grant
    Filed: January 29, 1988
    Date of Patent: June 19, 1990
    Inventor: James F. Williams
  • 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: 4806082
    Abstract: An improved flow-limiting fluid refill valve for use with a fluid-actuated pump having a fluid chamber comprises a valve housing, fluid inlet means in communication with a source of hydraulic fluid and fluid outlet means in fluid communication with the fluid chamber of the pump. A first valve within the valve housing is provided between the fluid inlet means and the fluid outlet means for permitting a flow of fluid from the fluid source to the fluid chamber when the suction pressure within the fluid chamber exceeds the first predetermined pressure limit indicating that the fluid within the fluid chamber has been depleted below a predetermined fluid limit. The improvement comprises a second valve within the valve housing for preventing the flow of fluid from the fluid source to the fluid chamber when the suction pressure within the fluid chamber exceeds a second predetermined pressure limit greater than the first predetermined pressure limit and indicating abnormal operation of the pump.
    Type: Grant
    Filed: November 9, 1987
    Date of Patent: February 21, 1989
    Assignee: Pennwalt Corporation
    Inventor: Jacob W. Schenk
  • 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: 4784579
    Abstract: Disclosed herein is a hydraulic to pneumatic power transfer unit which converts a high pressure oil flow into a flow of high pressure air by means of three stages of piston pumps and characterized by a first stage having a pair of linked pistons of substantially equal size both supplying air to a second stage piston which is directly linked to a third stage piston so that the pair of second and third stage pistons work alternately with the pair of first stage pistons and the linkage between each pair of pistons actuate spool valves which control the motion of the other pair of pistons.A further improvement is also disclosed in which an internal oil reservoir and a swash-plate pump is added to the system so that it may be powered by a rotating shaft instead of a flow of oil. In addition, the pulses of oil produced by the swash-plate pump directly control the piston pairs without the need for spool valves.
    Type: Grant
    Filed: December 19, 1986
    Date of Patent: November 15, 1988
    Assignee: Allied-Signal Inc.
    Inventor: Raymond W. Gazzera
  • Patent number: 4778355
    Abstract: A downhole well pump system comprises a reciprocating piston pump disposed in a fluid conduit in a wellbore which is filled with a driving fluid having a density preferably greater than the production fluid being pumped. The pump cylinder has a transverse partition and a piston assembly including an elongated piston rod extending through the partition and connected at its opposite ends to spaced apart pistons. The pump pistons and the cylinder partition divide the cylinder into a production fluid intake chamber, a production fluid transfer and delivery chamber, a driving fluid chamber and a second production fluid delivery chamber. Production fluid is conducted to the surface through a production fluid conduit disposed coaxial within the driving fluid conduit.
    Type: Grant
    Filed: September 11, 1986
    Date of Patent: October 18, 1988
    Assignee: John and Martin Holland and Associates Limited Partnership
    Inventor: John H. Holland
  • Patent number: 4776774
    Abstract: In a hydraulic double-acting hydropneumatic pressure multiplying device suited for generating hydraulic pressure, and comprising a cylinder within which a piston is slidably mounted. The multiplying device is capable of generating hydraulic pressure in both the backward and forward strokes of the piston within the cylinder. For this purpose, the cylinder is closed at the bottom by a lower cap having an upwardly extending plunger received within a portion extending upwardly from the piston. The cylinder also provides an upper cap with a dome and the upwardly extending portion of the piston is reciprocating within this dome, thus defining between the portion of the piston and the dome a first pressure generating chamber, and within the upwardly extending portion of the piston and the plunger of the lower cap a second pressure generating chamber for obtaining hydraulic pressure in both of the strokes of the piston.
    Type: Grant
    Filed: July 11, 1986
    Date of Patent: October 11, 1988
    Inventor: Julio C. Anastasia
  • Patent number: 4768932
    Abstract: There is provided an improved airless paint spray pump having an intake, an inlet valve assembly, a pumping chamber, an outlet, an outlet valve assembly, and stroke pumping means for pumping the fluid paint into the pumping chamber through the intake during the intake stroke and through the outlet on the pumping stroke. The inlet valve assembly includes a flat valve which cooperates with a valve seat at the intake and is displaced from the valve seat during the intake stroke of the pumping means and is seated on the valve seat during the pumping stroke of the pumping means. The flat inlet valve replaces the previous ball type inlet or check valve thereby expanding the design capabilities of the pump.
    Type: Grant
    Filed: July 25, 1986
    Date of Patent: September 6, 1988
    Inventor: John D. Geberth, Jr.