Having Means For Holding Pressure Responsive Distributor Open Patents (Class 417/446)
  • Patent number: 10947967
    Abstract: A discharge valve assembly configured to control fluid flow out of a chamber of a pump fluid end of a pump, wherein the discharge valve assembly comprises a controllable holding system (CHS), wherein the CHS is controllable to hold the discharge valve assembly in an open configuration.
    Type: Grant
    Filed: March 11, 2020
    Date of Patent: March 16, 2021
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Jim Basuki Surjaatmadja, Robert Lee Pipkin, Timothy Holiman Hunter
  • Patent number: 10844849
    Abstract: The inflating device has a body, a large cylinder, a small cylinder, a handle, a switching mechanism, and a switching device. The large cylinder is mounted moveably in the body and has an upper input gap, an inner bottom base, and a bottom base. The upper input gap is defined between an outer surface of a bottom end of the large cylinder and an inner surface of a first chamber of the body. The bottom base is connected with the large cylinder, is located below the inner bottom base, and has a first annular holding recess and a first O-ring. The small cylinder is mounted moveably in a second chamber of the large cylinder and has a piston base. The handle is mounted on the top end of the small cylinder. The switching mechanism is mounted on the top end of the large cylinder.
    Type: Grant
    Filed: January 10, 2019
    Date of Patent: November 24, 2020
    Assignee: DONGGUAN TIGER POINT, METAL & PLASTIC PRODUCTS CO., LTD.
    Inventor: Chun-Chung Tsai
  • Patent number: 9828987
    Abstract: A pump includes a reservoir configured to receive a fluid pressurized by a boost pump. The pump also includes at least one pumping mechanism configured to receive a first flow of fluid from the reservoir and direct the first flow of fluid into a discharge passage of the pump without pumping the first flow of fluid when priming the pump. The at least one pumping mechanism is disposed in the reservoir such that the fluid in the reservoir surrounds at least a portion of the at least one pumping mechanism. The discharge passage is configured to output the first flow of fluid from the pump. The pump further includes a bypass passage configured to communicate a second flow of fluid from the reservoir to the storage tank.
    Type: Grant
    Filed: January 30, 2015
    Date of Patent: November 28, 2017
    Assignee: Caterpillar Inc.
    Inventors: Joshua Wayne Steffen, Cory Andrew Brown
  • Patent number: 9091367
    Abstract: A backflow capable ball check valve includes a valve body including a fluid flow passage and a ball seat within the fluid flow passage. A valve ball is within the fluid flow passage and is configured for seating on the ball seat. The valve ball is movable between a normal operation and backflow capable modes. A stem and saddle assembly is coupled with the valve body, and the stem and saddle assembly is configured to cup the valve ball. Movement of the stem and saddle assembly moves the valve ball from the normal operation mode to a backflow capable mode. In the backflow capable mode the stem and saddle assembly positions the valve ball away from the ball seat with the saddle cupping the valve ball in surface to surface contact, for instance according to pivoting at a movable joint.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: July 28, 2015
    Assignee: Water Technology Resources
    Inventor: Matthew L.T. Waldor
  • Publication number: 20150139835
    Abstract: Unloader (1) for a valve element (30) of a compressor valve (40), comprising a least one unloader finger (2) and one carrier bushing (14), wherein the unloader finger (2) is fabricated from a first material, the carrier bushing (14) is fabricated from a second material using a casting method, and at least part of the unloader finger (2) is mould in with the material of the carrier bushing (14).
    Type: Application
    Filed: October 17, 2014
    Publication date: May 21, 2015
    Applicant: HOERBIGER KOMPRESSORTECHNIK HOLDING GMBH
    Inventors: Bernhard SPIEGL, Markus TESTORI, Andreas SCHLOFFER
  • Patent number: 8696336
    Abstract: A miniature unidirectional valve configured to restrict the free flow of fluid through the valve includes a valve body having an inlet and an outlet. A flexible membrane is movably disposed over the inlet and outlet, and movable between an open position and a closed position. The flexible membrane is movable by a pressure from the inlet to move the membrane to the open position. A control chamber is disposed in the valve body adjacent the fluid flow path, and configured to apply a pressure against the membrane to move the membrane to the closed position to restrict fluid flow through the valve. A preload structure is associated with the flexible membrane, and biases the flexible membrane toward the closed position.
    Type: Grant
    Filed: October 22, 2009
    Date of Patent: April 15, 2014
    Assignee: Sterling Investments, LC
    Inventors: Stephen C. Jacobsen, Shane Olsen
  • 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: 8500420
    Abstract: A suction valve includes a non-rotatable lock sleeve 20 concentrically arranged on a valve seat 3, the lock sleeve having a non-circular outer contour onto which an unloader 22 is placed with its radial central section 28 and which is correspondingly formed in a diametrically opposed manner to prevent turning.
    Type: Grant
    Filed: December 12, 2007
    Date of Patent: August 6, 2013
    Assignee: Hoerbiger Kompressortechnik Holding GmbH
    Inventors: Bernhard Spiegl, Markus Testori, Uwe Fuxa
  • Patent number: 8496454
    Abstract: An apparatus is provided and may include a compression mechanism, a valve plate having a plurality of ports, a header, and a plurality of cylinders disposed within the header. A plurality of pistons may be respectively disposed in the plurality of cylinders and may be movable between a first position separated from the valve plate and permitting flow through the plurality of ports and into the compression mechanism and a second position engaging the valve plate and restricting flow through the plurality of ports and into the compression mechanism. A chamber may be disposed within each of the cylinders and may receive a pressurized fluid in a first mode to move the piston into the second position and may vent the pressurized fluid in a second mode to move the piston into the first position. One of the chambers may include a different diameter than the other of the chambers.
    Type: Grant
    Filed: November 9, 2012
    Date of Patent: July 30, 2013
    Assignee: Emerson Climate Technologies, Inc.
    Inventors: Frank S. Wallis, Ernest R. Bergman
  • Patent number: 8308455
    Abstract: An apparatus is provided and may include a compression mechanism, a valve plate including a plurality of ports in fluid communication with the compression mechanism, and a header disposed adjacent to the valve plate. A plurality of cylinders may be disposed within the header and a plurality of pistons may be respectively disposed in the plurality of cylinders and may be movable between a first position separated from the valve plate and a second position engaging the valve plate. A chamber may be disposed within each of the cylinders and may receive a pressurized fluid in a first mode to move the piston into the second position and may vent the pressurized fluid in a second mode to move the piston into the first position. One of the chambers may include a smaller volume than the other of the chambers.
    Type: Grant
    Filed: January 27, 2010
    Date of Patent: November 13, 2012
    Assignee: Emerson Climate Technologies, Inc.
    Inventors: Frank S. Wallis, Ernest R. Bergman
  • Patent number: 8226379
    Abstract: A hydraulic pump includes a housing, a seat portion, and a valve element. The housing has a compression chamber and a fluid passage. The seat portion is provided midway through the fluid passage. The valve element is located between the compression chamber and the fluid passage. The valve element is a closed-end cylindrical member having a bottom portion, a cylindrical portion, and an opening end arranged in this order. The cylindrical portion is located farther away from the seat portion than the bottom portion. The valve element is seated to the seat portion at the bottom portion. A stopper substantially closes the opening end when making contact with the opening end to regulate movement of the valve element.
    Type: Grant
    Filed: March 28, 2008
    Date of Patent: July 24, 2012
    Assignees: Denso Corporation, Nippon Soken, Inc.
    Inventors: Katsunori Furuta, Kaoru Oda, Yoshihito Suzuki, Moriyasu Gotoh, Hiroshi Inoue
  • Patent number: 8167587
    Abstract: A pump assembly includes a housing and first and second valves. The housing has a fluid inlet port and a fluid outlet port. The first and second valves are substantially identical valves both including a mounting portion, a valve seat and a valve body. The mounting portion has a first end and a second opposite end. The first and second ends are both selectively mountable to a conduit defining a fluid path. The valve seat is interconnected to the mounting portion. The valve body is interconnected to at least one of the mounting portion and the valve seat for movement relative to the valve seat between a seated position and a closed position. The valve body includes a first side and a second side and is operative to seal against back flow from the first side and open to positive pressures on the second side. The first valve is mounted to the fluid inlet port with the first end such that the first valve normally functions to only permit fluid to flow into the housing.
    Type: Grant
    Filed: March 6, 2008
    Date of Patent: May 1, 2012
    Assignee: Thetford Corporation
    Inventors: Noah Dorsey, Michael Juska, Jason Smith, Brian Kelly
  • Patent number: 8096788
    Abstract: A pump having adjustable pumping pressures includes a tube, first and second chambers and a channel extending from the first end to the second end of the tube, and an orifice extending through the tube and opening to the channel. A base connected to the second end of the tube includes a first passage opening to the first and second chambers and a second passage opening to the first passage and the channel. A switching device includes a rod disposed in the channel and a shaft received in the orifice for selectively moving the rod to a first position for permitting air flow through the second passage to the channel and a second position for preventing air flow through the second passage to the channel.
    Type: Grant
    Filed: February 4, 2008
    Date of Patent: January 17, 2012
    Inventor: Scott Wu
  • Patent number: 7996929
    Abstract: A toilet system includes a toilet and a pump assembly. The toilet has a bowl and a base. The base has a hopper for receiving waste from the bowl. The pump assembly is operative for pumping a source of flush water to the bowl and for pumping the waste from the hopper. A first flexible conduit interconnects the pump assembly and the bowl. A second flexible conduit interconnects the pump assembly and the hopper. The pump assembly is flexibly interconnected to the toilet for independent positioning relative to the toilet.
    Type: Grant
    Filed: March 6, 2008
    Date of Patent: August 16, 2011
    Assignee: Thetford Corporation
    Inventors: Mark D. Good, Michael Juska, Jason Smith, Noah Dorsey, Brian Kelly
  • Patent number: 7959420
    Abstract: An unloader system for a reciprocating gas compressor includes an unloader valve assembly which may be installed as the suction valve assembly or the discharge valve assembly of the compressor. The valve assembly includes a valve seat having one or more seat passages formed therethrough and a valve guard having a number of valve members movably mounted thereon equal to the number of seat passages. One of the valve guard and valve seat is rotatable relative to the other. The rotatable member is driven by a constant torque motor or other power source which stalls when a retarding force caused by pressure differentials across the valve members overcomes the torque supplied. Once pressures across the valve members equalize, the rotatable member can resume rotation. A method of unloading a compressor using the unloader system includes selecting a rotational speed for the rotating member to allow backflow.
    Type: Grant
    Filed: September 26, 2007
    Date of Patent: June 14, 2011
    Assignee: ACI Services, Inc.
    Inventor: Lauren D. Sperry
  • Patent number: 7347673
    Abstract: A fluid machine is served as an expansion device and a compression device. The fluid machine compresses gas in an operation chamber upon functioning as the compression device. The fluid machine expands the gas in the operation chamber upon functioning as the expansion device. The fluid machine includes a movable discharge valve served as a differential pressure regulating valve that discharges the gas from the operation chamber when the fluid machine functions as the compression device. The discharge valve is moved to a non-operation position where the discharge valve fails to function as the differential pressure regulating valve when the fluid machine functions as the expansion device.
    Type: Grant
    Filed: July 12, 2004
    Date of Patent: March 25, 2008
    Assignee: Kabushiki Kaisha Toyota Jidoshokki
    Inventors: Akihito Yamanouchi, Masahiro Kawaguchi, Masao Iguchi, Xiaoliang Wang, Satoshi Umemura
  • Patent number: 7331767
    Abstract: For stepless capacity control of a reciprocating piston compressor, an unloader (2) arranged on a suction valve (1) keeps open said suction valve (1) over a thereby controllable portion of the working cycle of the compressor by means of an unloading piston (4) biased by gas pressure via a control valve (3). The gas pressure biasing the unloading piston (4) is always above the gas pressure required to overcome the maximum possible reverse flow force, whereby a controllable partial discharge of the unloading cylinder (6) is performed in each phase of the working cycle up to the closing of the suction valve (1) by means of the control valve (3), which is designed to switch rapidly. The theoretical discharge time of the entire discharging volume for the partial discharge is preferably maximal nearly equal or even less than twice the duration of the working cycle.
    Type: Grant
    Filed: September 17, 2003
    Date of Patent: February 19, 2008
    Assignee: Hoerbiger Kompressortechnik Services GmbH
    Inventors: Bernhard Spiegl, Peter Steinr├╝ck, Gunther Machu, Michael Miks
  • Patent number: 7290561
    Abstract: A valve for causing pulsatile flow in a multi-piston plunger pump includes a valve poppet, a valve seat, and a spring biasing the valve poppet against the valve seat; and a mechanism holding the valve poppet in an open position, thereby producing pulsatile flow from the pump. The mechanism includes a magnet and an adjustment mechanism for moving the magnet toward and away from the valve poppet. When the magnet is moved toward the valve poppet, the magnet attracts the poppet away from the valve seat, and when the magnet is moved away from the valve poppet, the magnet releases the poppet. The spring then biases the poppet against the valve seat in a closed position.
    Type: Grant
    Filed: December 16, 2004
    Date of Patent: November 6, 2007
    Assignee: Diversified Dynamics Corporation
    Inventor: Steve A. Larson
  • Patent number: 7278443
    Abstract: A valve for causing pulsatile flow in a multi-piston plunger pump includes a valve poppet, a valve seat, and a spring biasing the valve poppet against the valve seat; and a mechanism holding the valve poppet in an open position, thereby producing pulsatile flow from the pump. The mechanism includes a magnet and an adjustment mechanism for moving the magnet toward and away from the valve poppet. When the magnet is moved toward the valve poppet, the magnet attracts the poppet away from the valve seat, and when the magnet is moved away from the valve poppet, the magnet releases the poppet. The spring then biases the poppet against the valve seat in a closed position.
    Type: Grant
    Filed: July 29, 2005
    Date of Patent: October 9, 2007
    Assignee: Diversified Dynamics Corporation
    Inventor: Steve A. Larson
  • Patent number: 7207786
    Abstract: Fuel pump assembly 10 includes a filter 42 that rests on ledge 48, between the pump housing 22 and inlet cap 56. Filter detector 50 has a valve engager 62 for opening the check valve 58 and bearing feet 52 that engage the perimeter of the filter. When the filter is absent from the pump, the bearing feet 52 of the filter detector move beyond the ledge 48 into the recess 54 and the valve engager stem 62 retracts from the check valve 58 and the valve closes to terminate flow of fuel to the pump. The inlet and outlet caps 56 and 76 are rotatably mounted to the intermediate body of the pump to allow the fuel inlet and outlet to be oriented at angular intervals about the pump. A progressive seal is formed at the O-ring 86 between the inlet end cap 56 and the fuel pump housing to continue the seal as the end cap is removed or reassembled with the housing so that the check valve is closed before the housing is opened.
    Type: Grant
    Filed: December 7, 2004
    Date of Patent: April 24, 2007
    Inventor: Barry S. Grant
  • Patent number: 7156625
    Abstract: Fuel pump 10 includes a filter 42 that rests on ledge 48, between the pump housing 12 and inlet cap 56. Filter detector 50 has a valve engager stem 62 for opening the check valve 58 and bearing feet 52 that engage the perimeter of the filter but the bearing feet are out of alignment with the ledge. When the filter is absent from the pump, the bearing feet 52 of the valve engager move beyond the ledge 48 and the valve engager stem 62 retracts from the check valve 58 and the valve closes to terminate flow of fuel to the pump, thus limiting the fuel that can escape from then pump when it is opened. At least one of the inlet and outlet caps 56 and 76 are rotatably mounted to the intermediate body of the pump to allow the fuel inlet and outlet to be oriented at angular intervals about the pump to facilitate the connection of fuel lines to the pump.
    Type: Grant
    Filed: October 30, 2003
    Date of Patent: January 2, 2007
    Inventor: Barry S. Grant
  • Patent number: 6981852
    Abstract: A combined strainer and valve release structure formed as a unitary part of polyethylene with the strainer having a perforated wall and the valve release having a pushrod located on one side of the wall and an actuator tab located on the other side of the wall, with the pushrod in proximity to a movable member of an inlet check valve in a rest position and manually movable to an actuated position to dislodge the movable member when the movable member is adhered to a valve seat in the inlet check valve. The strainer moves the pushrod to the rest position when released from manual actuation.
    Type: Grant
    Filed: May 1, 2003
    Date of Patent: January 3, 2006
    Assignee: Wagner Spray Tech Corporation
    Inventor: Steven A. Anderson
  • Patent number: 6971861
    Abstract: A piston system for a reciprocating compressor is adapted for high speed, high pressure unloading conditions by providing a dual stage piston assembly wherein the piston is adapted for absorbing and redistributing a portion of the load during the high pressure applications or high pressure portion of a cycle without reducing the efficiency of the system during normal loads. Pressure of up to 4000 psi can be handled without damage to the piston or other valve components. The valve plate is held in the closed position by a compression spring which is adapted to be engaged by a finger/driver upon reciprocation of the valve piston. The finger driver moves with the piston against the valve plate to open the valve on the plunger downstroke and move away from the valve on the plunger upstroke. A shock absorbing element is positioned in the plunger/finger assembly to absorb the shock of the driving downstroke, thereby reducing the shock of the finger against the valve plate.
    Type: Grant
    Filed: February 19, 2003
    Date of Patent: December 6, 2005
    Inventors: Arthur L. Black, Gene M. Thompson
  • Patent number: 6565336
    Abstract: In its unstressed state, a suction valve is spaced from its valve seat such that the suction valve must be deformed against its inherent spring force in order to achieve seating. The spring force due to deformation provides an opening bias to the suction valve such that it opens earlier in the suction stroke and offsets the effects of adhesion due to the presence of oil between the seating surface and the valve.
    Type: Grant
    Filed: May 6, 1998
    Date of Patent: May 20, 2003
    Assignee: Carrier Corporation
    Inventors: Bruce A. Fraser, Wayne P. Beagle, Peter F. Kaido
  • Patent number: 6371741
    Abstract: A manual air pump includes an outer cylinder having a first chamber and a head provided to the second end of the outer cylinder. The head includes an outlet passage communicated with the first chamber for supplying air to an object to be inflated. An inner cylinder is securely mounted in the first chamber of the outer cylinder and includes a first end secured in the second end of the outer cylinder and a second end, the inner cylinder defining a second chamber that is communicated with the outlet passage. A piston rod has a first end with a piston slidably received in the first chamber of the outer cylinder and a second end extended beyond the outer cylinder, the piston separating the first chamber into a first chamber section adjacent to the head and a second chamber section distal to the head, the piston rod defining a third chamber therein. A handle is secured to the second end of the piston rod to move therewith.
    Type: Grant
    Filed: May 8, 2000
    Date of Patent: April 16, 2002
    Inventor: Scott Wu
  • Patent number: 5833209
    Abstract: To influence the periodic stroke movement of the closing element of a valve, a control cylinder working on the closing element in the stroke direction is provided, which can be acted upon or released by a control element periodically with pressure medium. The control element is connected in the supply or discharge conduit of the pressure medium and can variably accelerate or slow its pressure formation or release and with it also the stroke movement of the closing element, at last gradually. Thus a partially or completely automatic control of compressor valves, for example, can be made possible in a simple manner.
    Type: Grant
    Filed: July 28, 1995
    Date of Patent: November 10, 1998
    Assignee: Hoerbiger Ventilwerke Aktiengesellschaft
    Inventor: Peter Steinruck
  • Patent number: 5813841
    Abstract: A positive displacement pump assembly which has an hydraulically controlled intake check valve that is controlled by a three-way solenoid control valve. The intake valve contains a one-way check valve that opens when the pump piston is on an intake stroke and normally closes when the pump piston is on a power stroke. The check valve further contains an hydraulically controlled piston that can open the check valve during the power stroke so that the output fluid of the pump flows to drain. The piston is controlled by the solenoid control valve. The control valve has a pair of digitally latched solenoids. The output pressure of the pump can be regulated by energizing one of the solenoids and applying hydraulic pressure to the piston to open the check valve during the power stroke of the pump. The pump is preferably a dual piston wobble plate pump that incorporates a pair of hydraulically controlled intake check valves that are both controlled by a single solenoid control valve.
    Type: Grant
    Filed: May 16, 1996
    Date of Patent: September 29, 1998
    Assignee: Sturman Industries
    Inventor: Oded E. Sturman
  • Patent number: 5695325
    Abstract: An unloader system is provided for a gas compressor including a cylinder, a piston reciprocably mounted in the cylinder, a crankshaft connected to the piston and suction and discharge valve assemblies, selectively communicating the cylinder with suction and discharge lines. The compressor crankshaft is driven by a prime mover. The unloader system includes an unloader valve assembly, which can comprise one of the suction or discharge valve assemblies, and an unloader actuation system including a controller and a stepper motor. The unloader valve assembly includes a valve seat with a plurality of seat passages arrayed in a seat passage circle. The unloader actuation system rotates an unloader valve assembly guard and valve members mounted thereon in increments corresponding to the radial spacing of the valve members and the seat passages, with each incremental rotation corresponding to a single crankshaft revolution.
    Type: Grant
    Filed: October 4, 1995
    Date of Patent: December 9, 1997
    Inventor: Lauren D. Sperry
  • Patent number: 5642753
    Abstract: A plate mounted to a reciprocable shaft has a plurality of straight fingers (a) coupled thereto and (b) extending perpendicularly therefrom, and each of the fingers is separately detachable from the plate to simplify and facilitate maintenance and repair. Further, the fingers are identical, whereby manufacturing and stocking requirements are minimized.
    Type: Grant
    Filed: July 1, 1996
    Date of Patent: July 1, 1997
    Assignee: Dresser-Rand Company
    Inventors: Ethan P. Thistle, Michael A. DeCerbo, John R. Metcalf
  • Patent number: 5518377
    Abstract: A miniature metering pump of the type possessing a body provided with an inlet opening out into a metering chamber, associated with an inlet valve having a valve member, and with a piston having a plunger provided with an axial nozzle and flared at its bottom end to form a hood receiving a sealing gasket, its internal channel being associated with an outlet valve having a valve member, wherein said outlet valve member forms a portion of a single elastically deformable part that constitutes said gasket, shaped to have a bottom U-shaped ring assembled round the hood of the plunger, and connected at the top on the outside to a substantially cylindrical skirt for sealing and for returning the piston to its rest position, which skirt runs on from an annular flange for providing sealed connection with the body; and on the inside by a folded valve member that is generally conical or mitral-valve shaped, with a narrow top end carrying a cutout surrounded by a lip that opens to provide an outlet orifice.
    Type: Grant
    Filed: August 10, 1995
    Date of Patent: May 21, 1996
    Assignee: Sofab
    Inventors: Jean-Louis Bougamont, Pierre Dumont, Herve Lompech
  • Patent number: 5374167
    Abstract: A feed pump for a hydraulic system that is equipped with at least one outlet valve whose valve-closing body is loaded by a valve spring. The valve-closing body is held at a distance form its valve seat by means of a gas-filled hollow-body ring so that the feed pump can be evacuated through its outlet valve for subsequent filling with a hydraulic pressure medium. With a first increase in pressure in the system, the hollow-body ring is pressed together, so that the valve-closing body slips through the hollow-body ring and reaches its valve seat, thus making the outlet valve operational. The feed pump is suitable for use as a return pump for anti-skid systems of hydraulic brake systems.
    Type: Grant
    Filed: January 4, 1994
    Date of Patent: December 20, 1994
    Assignee: Robert Bosch GmbH
    Inventor: Dirk Merbold
  • Patent number: 5338160
    Abstract: A radial piston pump includes a plurality of radially arranged cylinder-pger assemblies having suction valves and pressure-regulating valves, with the plungers being controlled by an eccentric disk which eccentrically circulates relative to a housing accommodating the cylinders. In order to provide a radial piston pump of this type with a simple design and to allow a digital operation of the pump for controlling the flow rate, the space between the end faces (12) of the cylinders (9) and the pertaining plungers (7) is connectable with a pressure manifold (19) of the pump by a randomly controllable valve (21, 22), with the plungers (9) of the pump preferably having different diameters.
    Type: Grant
    Filed: April 26, 1993
    Date of Patent: August 16, 1994
    Assignee: Gesellschaft fur okologische Okomobil Technologie fur Fahrzeuge GmbH
    Inventor: Jorg Thurner
  • Patent number: 5331998
    Abstract: A suction valve for a gas compressor includes a cylindrical valve guide cage with plurality of rows of valve guides, each with a corresponding poppet valve slidably movable therein. Each valve guide communicates with a compressor cylinder. A concentric cylindrical valve seat chair with a like plurality of rows of valve seats surrounds the valve guide cage. Each valve seat communicates with a suction chamber. A plurality of openings extending through the guide cage are spaced between the rows of valve guides. To unload the compressor, the valve guide cage is movable relative to the valve seat chair, thus unseating the poppet valves and effectively opening the compressor cylinder to the suction chamber. A first embodiment uses a pneumatic cylinder to move the valve guide cage longitudinally while a second embodiment uses a rotary crank to move the valve guide cage rotationally.
    Type: Grant
    Filed: February 1, 1993
    Date of Patent: July 26, 1994
    Inventor: Lauren D. Sperry
  • Patent number: 5306122
    Abstract: A diaphragm pump with a flat diaphragm which is held between the face surface of a pump head and the corresponding face surface of a hydraulic block is improved in that the annular clamping region has an angling step such that the clamped-in diaphragm is bent in its outer annular border region. In this way, a sealed tightness is achieved over long time periods, as well as inducing a uniform diaphragm tension which effects performance of the pump advantageously. Inventive valve designs are provided which allow removal for cleaning from outside the assembled pump and also allows manual /pening of the valves for unclogging. An efficient design is provided for a pump head.
    Type: Grant
    Filed: August 21, 1992
    Date of Patent: April 26, 1994
    Assignee: J. Wagner GmbH
    Inventors: Gerhard Gebauer, Wilfried Goes, Otto Rosenauer
  • Patent number: 5282738
    Abstract: The liquid fuel burning apparatus includes a fuel tank, a burning unit for burning the fuel, an electromagnetic pump for sucking the fuel from the tank, a feeding pipe for feeding the sucked fuel to the burning unit, and a control unit for controlling the electromagnetic pump. The electromagnetic pump has a plunger which is reciprocated by a plunger solenoid to suck the fuel in the fuel tank and discharge the sucked fuel therefrom in the associative motion of a suction and a discharge valves incorporated therein. The control unit opens the valves for a predetermined time when the fuel supply is stopped. Thus, fuel remained at an end of the feeding pipe is collected from so that the unburnt gas or strange smell which would be generated when the unnecessary liquid fuel is supplied to the burning means can be restricted.
    Type: Grant
    Filed: April 24, 1992
    Date of Patent: February 1, 1994
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Hiroo Oshima, Takehiko Shigeoka
  • Patent number: 5277553
    Abstract: The invention relates to a valve-controlled positive displacement pump having valve triggering, which permits the forced opening or keeping open of an inlet valve, operating in the manner of a non-return valve, of a displacer working space, so that the displacer working space remains connected to the inlet side of the unit even during the working stroke of the displacer, and the assigned displacer is not able to work efficiently. The design according to the invention is particularly suitable for radial piston pumps.
    Type: Grant
    Filed: November 6, 1992
    Date of Patent: January 11, 1994
    Assignee: Mercedes-Benz AG
    Inventor: Dieter Stolpp
  • Patent number: 5192198
    Abstract: A diaphragm pump with a flat diaphragm which is held between the face surface of a pump head and the corresponding face surface of a hydraulic block is improved in that the annular clamping region has an angling step such that the clamped-in diaphragm is bent in its outer annular border region. In this way, a sealed tightness is achieved over long time periods, as well as inducing a uniform diaphragm tension which effects performance of the pump advantageously. Inventive valve designs are provided which allow removal for cleaning from outside the assembled pump and also allows manual opening of the valves for unclogging. An efficient design is provided for a pump head.
    Type: Grant
    Filed: August 27, 1990
    Date of Patent: March 9, 1993
    Assignee: J. Wagner GmbH
    Inventors: Gerhard Gebauer, Wilfried Goes, Otto Rosenauer
  • Patent number: 5154589
    Abstract: A metering pump wherein the head is provided with internal threads terminating adjacent to internal shoulders at each of the pump cylinder, inlet valve and outlet valve ports. The cylinder, inlet valve and outlet valve each include a flange secured to the shoulder by a collar threadably received in each of the ports. O-rings are provided in a circumferential groove in the body or cylinder of the pump inlet valves and outlet valves downstream of the flange. A piston pump structure includes a bushing mounted to the piston rod between the piston head and a second breakaway stop connected to the piston rod. The piston head includes a plurality of circumferential grooves for receiving respectively a cup seal or an O-ring seal. A suck-back mechanism is provided in a bore in the head and includes a stem having an eccentric cam which interacts with the valve structure to adjust the degree of closure by rotation of the stem.
    Type: Grant
    Filed: November 9, 1990
    Date of Patent: October 13, 1992
    Assignee: National Instrument Company
    Inventors: Mark A. Ruhl, William M. Hamilton, John M. Bronw, Jr., Richard N. Bennett
  • Patent number: 4991747
    Abstract: A reciprocating pump for dispensing liquids from a container comprises a hollow body in which is slidably fitted a hollow piston. A piston seat is located in the body and provides a segment sized for sealing fit inside the hollow piston, thereby minimizing possible leakage through the pump when it is transported with a liquid filled container. Upper and lower valves are provided in the piston and body respectively. The piston seat is adapted to interact with the upper valve member to hold it open during a portion of an upward stroke of the piston thereby drawing any undispensed liquid back into the pump.
    Type: Grant
    Filed: October 11, 1988
    Date of Patent: February 12, 1991
    Assignee: Risdon Corporation
    Inventor: Owen F. Van Brocklin
  • Patent number: 4527959
    Abstract: A pump is provided for circulating drilling fluid and the like into a well during a well drilling process. The pump comprises a pair of double-ended piston assemblies hydraulically reciprocated in opposite directions by a common hydraulic drive arrangement, wherein each piston assembly has a relatively large piston at one end and a relatively small piston at an opposite end. The various pistons reciprocate within appropriately sized cylinders each having a working end with a one-way intake valve through which drilling fluid is drawn from a supply tank and a one-way discharge valve through which drilling fluid is discharged to the well.
    Type: Grant
    Filed: May 10, 1983
    Date of Patent: July 9, 1985
    Assignee: Whiteman Manufacturing Company
    Inventor: Marvin E. Whiteman
  • Patent number: 4338066
    Abstract: A grease gun is fed from a constant supply under pressure. The gun has a hand-pumped lever for delivering shots of grease either at high pressure and low volume or low pressure and high volume depending on a changeover valve. Air bleeds from the gun through the nozzle by a single pump of the lever. The lever causes a pushrod to open a one way valve allowing grease to travel entirely through the gun to the nozzle.In another version the pushrod is replaced by a cone valve. Both versions are for single handed operation.
    Type: Grant
    Filed: February 11, 1980
    Date of Patent: July 6, 1982
    Inventor: Graham J. Luker
  • Patent number: 4230160
    Abstract: A suck-back arrangement for a sanitary filling unit in which a threaded adjusting member adapted to be selectively moved into and out of the path of the valve member of the outlet valve assembly is in threaded engagement only with a support member disposed externally of the outlet valve assembly while an unthreaded portion of the adjusting member extends into an unthreaded bore of the outlet valve housing so that no threaded parts are exposed to or come in contact with the product dispensed by the filling unit.
    Type: Grant
    Filed: December 11, 1978
    Date of Patent: October 28, 1980
    Assignee: National Instrument Company, Inc.
    Inventor: Lawrence W. Buckley
  • Patent number: 4080107
    Abstract: A pump for pumping insulating oil for oil-filled electric cables in which a driven piston is within and spaced from a tubular bellows which is surrounded by an enclosure. The bellows forms a chamber with the enclosure which contains the cable oil, and the bellows prevents contact of the mechanical parts of the pump, other than an intake valve and a delivery valve, with the cable oil. Preferably, the space between the piston and the bellows is filled with oil to transmit motion of the piston to the bellows. The delivery valve is urged closed by a spring, and the intake valve has an element made of lightweight materials and is held closed by gravity and the cable oil pressure but opens by reason of cable oil pressure reduction and the static pressure of the cable oil fed to the intake valve. Also, a plurality of such pumps operable by a single drive mechanism and a method for evacuating gas from the pump and pump lines in which the delivery valve is operated by a magnetic field external to the valve.
    Type: Grant
    Filed: August 13, 1976
    Date of Patent: March 21, 1978
    Assignee: Industrie Pirelli Societa per Azioni
    Inventor: Antonio Ferrentino
  • Patent number: 4008011
    Abstract: A piston compressor, in which an electromagnet coil is mounted on the outer side of the cylinder block cover and is used to actuate the suction valves of the cylinder block. The electromagnet coil is connected to each suction valve of the cylinder block through a magnetic circuit. The magnetic circuit is formed by the cylinder block cover, by the cylinder block body and by the pressure valve of each cylinder. The cylinder block cover and the cylinder block body are interlaid with a gasket made of nonmagnetic material.
    Type: Grant
    Filed: February 20, 1975
    Date of Patent: February 15, 1977
    Inventors: Vsevolod Sergeevich Scherbakov, Igor Andreevich Gruzintsev, Viktor Mikhailovich Zolotukhin