Piston Carried Distributor, One Frictionally Engages Chamber Wall, Drive Rod Integral With Other (e.g., Piston Driven By Valve Element Through Lost Motion Connection, Etc.) Patents (Class 417/511)
  • Patent number: 10190399
    Abstract: A traveling valve assembly adapted to be coupled to a southern end of a pump plunger wherein the traveling valve has an elongated body and two ball valves, one positioned at the northern end of the traveling valve and another positioned at the southern end of the traveling valve. The traveling valve prevents pumped fluid that has slipped downwardly past the pump plunger from continuing to slip further down into the pump barrel. The traveling valve captures that pumped fluid that has slipped downwardly so that it may be produced upwardly through the pump.
    Type: Grant
    Filed: April 14, 2015
    Date of Patent: January 29, 2019
    Inventor: Michael Brent Ford
  • Patent number: 9945400
    Abstract: A vapor transport device can include a tube, a first cap positioned at a first region of the tube, a second cap positioned at a second region of the tube, and a piston positioned between the first cap and the second cap so as to divide the tube into a first chamber of variable size that extends between the first cap and the piston and a second chamber of variable size that extends between the piston and the second cap. The vapor transport device can further include a drive shaft connected to the piston and extending through the second cap, and can also include one or more one-way valves.
    Type: Grant
    Filed: May 26, 2016
    Date of Patent: April 17, 2018
    Assignee: Paradigm Waterworks, LLC
    Inventor: Lyle Bates
  • Patent number: 9470250
    Abstract: The invention relates to a triggered-stroke actuator (10) comprising a body (12) housing a piston (14) and a rod (16), and a gas generator (18) mounted in said body (12) opposite said piston (14) and capable of pressurising a first chamber (20) defined between said gas generator and said piston, in which the piston (14) comprises, on its external face, a groove (30) in which is housed a sealing joint (40) with the body (12) of the actuator (10). A calibrated passage (50), adapted to evacuate gas from the first chamber (20), is formed between the sealing joint (40) and the wall of the groove (30).
    Type: Grant
    Filed: June 14, 2011
    Date of Patent: October 18, 2016
    Assignee: HERAKLES
    Inventors: Frédéric Marlin, Jean-Paul Nadeau
  • Patent number: 9200753
    Abstract: Various embodiments of a flow diverter, a valve and a method of controlling air flow in the valve are disclosed. The flow diverter has a cylindrical body, a plurality of circumferentially spaced apart longitudinal members, an open end portion, a closed end portion and a raised element extending outwardly from the closed end portion. The flow diverter is disposed in a cavity in the valve. The cavity is in communication with a supply passage, an exhaust passage and a delivery passage. Air passes through the flow diverter to the delivery passage when the flow diverter is in a delivery position. Air moves the flow diverter from the delivery position to an exhaust position when air pressure in the delivery passage is greater than air pressure in the supply passage. The flow diverter restricts air from passing from the delivery passage to the supply passage when in the exhaust position.
    Type: Grant
    Filed: August 2, 2012
    Date of Patent: December 1, 2015
    Assignee: Bendix Commercial Vehicle Systems LLC
    Inventors: Tarah L. Peabody, Attila Naszek
  • Patent number: 8302432
    Abstract: A washing machine having an improved structure in circulation and drain of washing water are disclosed. The washing machine includes a main body, a water tub which is disposed in the main body, a drain line in which washing water drained from the water tub flows, a circulation line in which washing water returning to the water tub flows, a discharge line in which washing water discharged out of the main body flows, a pump which flows the washing water such that the washing water drained from the water tub returns to the water tub or is discharged out of the main body, a flow path switching device having a single reciprocating member which opens and closes the circulation line or the discharge line, and an operating unit which operates the flow path switching device.
    Type: Grant
    Filed: February 11, 2009
    Date of Patent: November 6, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Seung Hwan Chung, Seung Kwun Ahn
  • Patent number: 8197237
    Abstract: A drive device, comprising a housing, a rod, a limiting device, a sliding block, a rotating block, a pair of springs, a pair of first grooves, and a second groove. The rod passes through the sliding block, an axis is disposed on the sliding block, the rotating block is disposed on the axis, the springs are disposed on both sides of the rotating block, the top of the spring is contacted with one side of the rotating block, the first grooves are disposed on one side of the rod opposite to the housing, the second groove is disposed on inner side of the housing opposite to the first groove, a middle part of the second groove is lower than other parts thereof, one end of the rotating block slides in the second groove, and the other end of the rotating block slides in and between the first grooves.
    Type: Grant
    Filed: August 11, 2010
    Date of Patent: June 12, 2012
    Inventors: Bo Lin, Jiang Lin
  • Publication number: 20090001041
    Abstract: A cap device for capping an open wine bottle includes a base with a lower cylindrical portion that defines an interior space. The lower cylindrical portion engages the interior of the wine bottle. A pumping element engages an upper cylindrical portion of the base to define an interior portion in communication with the interior space. A first valve assembly is disposed in the lower cylindrical portion and is in communication with the interior space and the interior of the wine bottle. The first valve assembly is movable between an open and closed position for pulling air from the wine bottle. A second valve assembly is disposed in the upper cylindrical portion of the base and is in communication with the interior portion and the atmosphere. The second valve assembly is movable between an open and closed position for pushing air from the interior portion to the atmosphere.
    Type: Application
    Filed: June 23, 2008
    Publication date: January 1, 2009
    Inventor: Domenic Belcastro
  • Patent number: 7381035
    Abstract: A pump for use with a dispensing unit of a liquid hot melt adhesive system, dispensing units including the pump, and a method of operating a pump for pumping a liquid like liquid hot melt adhesive. The pump has a piston movable within a pumping chamber for transferring liquid from an inlet to an outlet. A valve body, which is resiliently biased relative to the piston, is moved out of contact with the inlet when the piston moves in a first direction and into contact with the inlet when the piston moves in a second direction. When the piston is moved in the first direction, the resilient biasing actively lifts the valve body out of contact with the inlet for overcoming any attractive adhesive force acting between the valve body and inlet.
    Type: Grant
    Filed: February 11, 2005
    Date of Patent: June 3, 2008
    Assignee: Nordson Corporation
    Inventor: John Matthew Riney
  • Patent number: 7029249
    Abstract: A micropump provided with a cylindrical body (1) containing a measuring chamber (10) defined by a piston (2) and communicating firstly with a tank via an inlet orifice (10a) provided with an inlet valve, and secondly with the outside via an outlet orifice (10b) provided with an outlet valve, the micropump being characterized in that the piston (2) is connected to an external reciprocating actuator, and in that at least one of said valves is constituted by a valve member (3, 6, 7) suitable for being driven in translation by friction contact with said piston (2) successively in one direction and then in the other, and whose stroke inside the chamber (10) is shorter than the stroke of said piston.
    Type: Grant
    Filed: December 11, 2001
    Date of Patent: April 18, 2006
    Assignee: Rexam Dispensing Systems
    Inventors: Jean-Louis Bougamont, Pierre Dumont
  • Publication number: 20040253131
    Abstract: The present invention relates to a reciprocating compressor. There is a compression chamber inside of a cylinder, having a piston inserted therein. The piston includes a head, a skirt extended from a lower end of the head so as to be spaced away from an inside wall of the cylinder, and guide surfaces extended from an outside surface of the skirt. Since the skirt is not in contact with the cylinder, a friction loss between the piston and the cylinder is reduced, and the guide surfaces assist the piston to make stable reciprocation. The head has a projection so as to be inserted into a discharge hole when the piston is at a top dead center. According to this, a dead volume formed when the piston is at the top dead center is reduced, thereby improving an efficiency of the compressor.
    Type: Application
    Filed: April 1, 2004
    Publication date: December 16, 2004
    Applicant: LG Electronics Inc.
    Inventors: Dong Woo Park, Min Kyu Jung
  • Patent number: 6474957
    Abstract: A suction port as a fluid port of a piston type compressor is contoured with reference to a middle line passing through a middle point of a maximum length of the suction port in the longitudinal direction of the suction valve and perpendicularly crossing a reference line extending in the longitudinal direction. The middle line divides the suction port into a first section positioned on the proximal end side and a second section positioned on the distal end side. An area of the second section is greater than an area of the first section. A width increasing region is disposed in which the width of the suction port becomes gradually greater from the proximal end side to the distal end side, and the length of the width increasing region occupies a major part of the maximum length of the suction port.
    Type: Grant
    Filed: May 2, 2001
    Date of Patent: November 5, 2002
    Assignee: Kabushiki Kaisha Toyoda Jidoshokki Seisakusho
    Inventors: Naofumi Kimura, Masakazu Obayashi
  • Patent number: 6328057
    Abstract: An air valve connection head is compatible with a variety of air pumps and is formed of a first housing member and a second housing member. The first housing member is provided at one end thereof with an insertion hole in which the second housing member is lodged, and at other end thereof with a connection hole engageable with a cylindrical tube of the air pumps. The first housing member is further provided with a first air duct in communication with the connection hole and the insertion hole. The second housing member is provided with a receiving cell which is in turn provided at one end with a fitting port for receiving the air valve of an inflatable object. The receiving cell is provided at other end with a control handle pivoted thereto. The receiving cell is provided with an air injecting mechanism which is controlled by the control handle to lash securely and open up the air valve.
    Type: Grant
    Filed: April 24, 2000
    Date of Patent: December 11, 2001
    Inventor: Lo-Pin Wang
  • Patent number: 5927957
    Abstract: New plunger having a cylindrical hollow body 20 or 20B, a handle 30, 30A, or 30B, an outlet hose 40, an outlet tip 42, and a valve or flap 50, 60, or 70 that is able to control the air flow within the hollow 25 of the cylindrical body 20 or 20B. Valve or flap 50, 60, or 70 is moved into a closed position so that air is forced out of the front of the plunger and towards a clogged or stopped area 82 or 92 and is moved into an open position so that air enters the back of the plunger and passes valve or flap 50, 60, or 70 so that water and/or clogging material is not drawn or sucked into the interior of the plunger. First embodiment plunger 10 discloses a flexible valve flap 50 that compresses against the inner wall of the cylindrical body 20 in a closed position and flexes outwardly and away from piston plate 38 in an open position.
    Type: Grant
    Filed: June 16, 1997
    Date of Patent: July 27, 1999
    Inventors: Craig A. Kennedy, Daniel L. Poole
  • Patent number: 5326237
    Abstract: A pump for moving a fluid includes an outer chamber having a first end wall portion containing a fluid entrance port and a second end wall portion containing a fluid exit port, a valve tube slidably contained within the chamber and having a first edge with a cut out section, adjacent the chamber first end wall portion, a first cup member within the valve tube having an outwardly flared side wall with a lip resiliently bearing against the valve tube adjacent the first edge and having a bottom wall smaller than the chamber first end wall portion, spacer connecting and spacing apart the first cup member bottom wall and the chamber first end wall portion, a plunger having a tubular stem portion containing a check valve plug and extending through the chamber exit port, and having a second cup member contained within the valve tube and also having a bottom wall with a hole opening into the stem portion and an outwardly flared side wall bearing against the valve tube and oriented to oppose the first cup member, such
    Type: Grant
    Filed: March 8, 1993
    Date of Patent: July 5, 1994
    Assignee: Dupont Industries, Inc.
    Inventors: Howard E. Cecil, Thomas Dupont
  • Patent number: 5285932
    Abstract: An apparatus for mixing two fluids in precise proportions which includes a quantifying meter and a concentrate meter. The apparatus also includes apparatus connecting the quantifying meter and the concentrate meter to simultaneously operate the quantifying meter and concentrate meter. The quantifying meter includes a servo plunger that is elongated and further includes a piston and a sealing member. The piston and the sealing member are axially spaced and the quantifying meter also includes a servo piston having a central bore in which the servo plunger is disposed in coaxial relationship with the piston in sealing engagement with the central bore. The servo piston includes a pressure fluid entrance port and an axially spaced outlet bore.
    Type: Grant
    Filed: November 15, 1991
    Date of Patent: February 15, 1994
    Inventor: Ronald A. Boudreau
  • Patent number: 5188519
    Abstract: A reciprocating pump which substantially eliminates cavitation problems without imposing capacity and flow limitations to maintain a net positive suction head.
    Type: Grant
    Filed: July 11, 1991
    Date of Patent: February 23, 1993
    Assignee: CVI Incorporated
    Inventor: Ivars S. Spulgis
  • Patent number: 5184943
    Abstract: An additive injection pump has a rolling diaphragm mounted between a reciprocable assembly and a cylinder to create a secondary fluid pumping chamber in the lower end of the cylinder. The reciprocable assembly has an internal one-way flow passage between the pumping chamber and an opposite end portion of the assembly having an outlet. The selective positioning of a valve member at the bottom of the reciprocable assembly establishes a predetermined quantity of secondary fluid supplied through an inlet at the bottom of the cylinder. When the cylinder is attached to a housing having a primary fluid stream and the assembly is reciprocated by a fluid motor in the housing, secondary fluid in predetermined doses is injected into the primary fluid stream.
    Type: Grant
    Filed: March 8, 1991
    Date of Patent: February 9, 1993
    Assignee: Frank and Robyn Walton 1990 Family Trust
    Inventor: Frank Walton
  • Patent number: 5165876
    Abstract: A tire pump comprises a first cylindrical body, a second cylindrical body, a two-way air admission piston, a piston rod, a first one-way valve, a hand grip, a second one-way valve, a third one-way valve, a fourth one-way valve, and an air valve connection head. The second cylindrical body is fitted to one end of the first cylindrical body. The two-way air admission piston is disposed in the first cylindrical body in such a way that it divides the first cylindrical body into two air-receiving spaces. The piston rod is secured to one end of the two-way air admission piston. The first one-way valve is disposed at one end of the first cylindrical body, while the second one-way valve and the third one-way valve are disposed at other end of the first cylindrical body. The fourth one-way valve and the air valve connection head are arranged at one end of the second cylindrical body.
    Type: Grant
    Filed: November 26, 1991
    Date of Patent: November 24, 1992
    Inventor: Ropin Wang
  • Patent number: 5147188
    Abstract: A reciprocating priming piston pump is provided with a piston check valve which provides improved performance by minimizing the pressure drop there through. A dog-bone shaped seat is slideably located inside a piston which in turn slides inside the cylinder of the pump. The piston is restrained at one end by seating upon the valve seat and its outer end by contact with the displacement rod. Rounded surfaces on the valve seat contribute to smooth flow and a slotted guide fingers in the upper end of the piston allow ample flow into the upper chamber from the lower chamber.
    Type: Grant
    Filed: April 11, 1990
    Date of Patent: September 15, 1992
    Assignee: Graco Inc.
    Inventor: Thomas J. Shaefer
  • Patent number: 5139398
    Abstract: A neutralizer valve that is for use in conjunction with one or more reciprocating pumps of a tubing string that is operated in an oil well for recovery of crude oil. The neutralizer valve takes the place of a regular traveling valve in a rod pump, which includes a drag plunger for passing a crude and natural gas mix therethrough on a down stroke of the tubing string. The neutralizer valve includes a guide barrel that connects into the rod pump plunger and contains a ported seal stem that is arranged to move up and down therein. The ported seal stem includes a keyed rod as its upper end that is for fitting to travel up and down in a keyway that is formed through a ported disk which is arranged across the guide barrel interior. The ported seal stem includes a collar formed around its mid-section, the undersurface of which collar is a valve face that is for engaging, so as to seal against a seat that is maintained in the guide barrel.
    Type: Grant
    Filed: April 8, 1991
    Date of Patent: August 18, 1992
    Assignee: D & L Valve, Inc.
    Inventor: Donald R. Downing
  • Patent number: 5067882
    Abstract: A dual-acting, reciprocating piston pump is provided which comprises a pump body formed with a passageway having an inlet and a discharge outlet which receives a piston assembly including a plunger rod carrying a valve plate or spider, a shovel rod carrying a shovel disc and a rod connector formed with a valve seat which interconnects the plunger rod and shovel rod. A tubular check valve is carried on the rod connector between the valve seat and the valve plate in sliding contact with the internal wall in the pump body formed by the passageway, which divides the passageway into an upper pumping chamber communicating with the discharge outlet and a lower pumping chamber communicating with the inlet. A second check valve is located at the inlet to the passageway in the pump body and is movable between an open and closed position relative thereto.
    Type: Grant
    Filed: June 20, 1990
    Date of Patent: November 26, 1991
    Assignee: Nordson Corporation
    Inventors: James E. DeVries, Samuel R. Rosen, Robert D. Schneider
  • Patent number: 5058779
    Abstract: A pneumatically operated metering pump having in a single cylinder, a driven piston and a slave piston that operates as a sliding valve for admitting fluid into the pump and drawing it into the cylinder between the two pistons so the next downward stroke of the master piston will force the fluid from the discharge port.
    Type: Grant
    Filed: February 20, 1990
    Date of Patent: October 22, 1991
    Inventor: Silverio B. Surdilla
  • Patent number: 4978283
    Abstract: A chop-check pump for viscous material having cylinder means defining an axis, a drive rod axially movable within the cylinder means, a primer valve attached at one end of the drive rod and movable with the drive rod, and a floating check valve mechanism associated with the cylinder means at an outlet from the cylinder means through which the drive rod extends into the cylinder means. The primer valve includes a distal valve plate secured to the drive rod and a slidable valve plate on the drive rod slidable between a position against the distal valve plate and a position spaced from the distal valve plate. There are flow passages in both valve plates. Preferably, the flow passages in the slidable valve plate and the distal valve plate have a cross sectional area slightly less than the cross sectional area of the respective plates. In one embodiment, the slidable valve plate has a radial extent greater than that of the distal valve plate.
    Type: Grant
    Filed: September 8, 1989
    Date of Patent: December 18, 1990
    Assignee: The Aro Corporation
    Inventor: Kerry G. Vonalt
  • Patent number: 4975028
    Abstract: Apparatus for evacuating a rigid container using a two-stroke reciprocating-piston pump having an air evacuating vacuum cup which is to be applied to the container lid. The pump cylinder houses a reciprocating piston-check-valve. An adhesive-tape check valve is applied to a container access opening in the lid; and the vacuum cup is seated over the adhesive-tape check valve to evacuate the rigid container. An alternative embodiment employing a vacuum probe having an in-line check valve is inserted into an otherwise plugged opening in the pump cylinder wall to evacuate a deformable container. In the second embodiment, the adhesive-type check valve is eliminated. The two check valves employed in each embodiment alternate open and closed states during piston reciprocation.
    Type: Grant
    Filed: January 13, 1989
    Date of Patent: December 4, 1990
    Inventor: Glen R. Schultz
  • Patent number: 4892468
    Abstract: A hydraulic pump is disclosed, characterized in that, in the hydraulic pump including a cylinder body having a cylinder chamber, a suction port and an ejection port, a cam member and a reciprocatingly movable member are provided, wherein oil in said cylinder chamber is ejected when said movable member is pushed into said cylinder chamber by the cam member, a cylindrical piston is slidably fitted into said cylinder chamber, so that the movable member is engaged with the cylindrical piston when it is pushed into the cylinder chamber so shut off communication between the cylinder chamber and the suction port and a valve provided in the ejection passage communicating to said ejection port is opened due to the pressure rise when said movable member is further pushed into said cylinder chamber to eject the oil in the cylinder chamber outwardly.
    Type: Grant
    Filed: August 8, 1988
    Date of Patent: January 9, 1990
    Assignees: Akebono Brake Industry Co., Ltd., Akebono Research, Development Centre Ltd.
    Inventor: Toshifumi Maehara
  • Patent number: 4889250
    Abstract: A hand-operated vacuum pump is combined with a resilient closure sleeve for sealing and de-pressurizing the open space within a fermented beverage container. A pump cylinder is covered by a resilient closure sleeve which is insertable into the neck of the beverage container. A piston is coupled for extension and retraction through the pump cylinder. The piston carries a floating seal which is axially movable along a reduced diameter portion of the piston for opening and closing an air inlet port between an air transfer annulus and an evacuation chamber. The pump includes an improved check valve assembly in which a suction port is sealed by a resilient membrane which engages a tapered sealing surface in which the suction port is formed.
    Type: Grant
    Filed: June 30, 1988
    Date of Patent: December 26, 1989
    Assignee: E Street Enterprises, Inc.
    Inventor: Michael B. Beyer
  • Patent number: 4862696
    Abstract: An apparatus for a dosage of minor amounts of condensed gas includes a container (2) connected to a source of liquid gas by an inlet conduit (5). The container is thermally insulated (3) and disposed in a surrounding jacket (6). Apparatus includes a device (17) for maintaining a predetermined liquid level in container (2) and a dosage pump (4). The dosage pump (4) is disposed in container (2) below the predetermined liquid level (10).
    Type: Grant
    Filed: February 17, 1989
    Date of Patent: September 5, 1989
    Assignee: AGA-AB
    Inventors: Birger Runkvist, Lars Lindgren, Sabud Axelsson
  • Patent number: 4813485
    Abstract: The pumping or swabbing device and apparatus of the invention utilizes an elongate barrel slidable upwardly and downwardly on an axial rod which carries a valve element for closing on a valve seat provided interiorly of the barrel to close passage through the barrel of down-hole pressure fluid and cause such fluid to raise barrel and rod of the device through a gas and oil well casing to the wellhead, where liquid above the device is pushed to discharge at the wellhead. Spring actuated detent latching elements coact with a pair of longitudinally spaced lower and upper latching recesses to hold the barrel and rod together against relative movement in lower valve-closed and upper valve-opened positions. A sealing packer encircles the barrel and a by-pass passage thereinto leading from and back into the barrel flow passage provides sealing pressure within such packer as the device rises in the well casing. A manually or pressure operated latch provides for holding the device in the wellhead as desired.
    Type: Grant
    Filed: June 10, 1987
    Date of Patent: March 21, 1989
    Assignee: ConCoyle Oilfield Tools, Inc.
    Inventor: Gary W. Coyle
  • Patent number: 4792289
    Abstract: In a reciprocating pump for cryogenic fluids comprising a pump cylinder in which a piston is oscillatingly displaceable in a sealed state, an inlet valve and an outlet valve, and an annular channel surrounding the pump cylinder on the outer side and forming an outlet for the cryogenic fluid delivered by the pump, in order to attain optimum sealing at the operating temperatures, without the piston motion being impeded at higher temperatures, it is proposed that the cylinder be made of a material with good sliding and self-lubricating properties and a thermal expansion coefficient which is larger than that of the piston, that the dimensions of the cylinder and the piston be so selected that the piston sealingly contacts the inside wall of the cylinder at operating temperature, and that the outlet valve be arranged at the downstream end of the annular channel.
    Type: Grant
    Filed: June 17, 1987
    Date of Patent: December 20, 1988
    Assignee: Deutsche Forschungs- und Versuchsanstalt fur Luft- und Raumfahrt e.V.
    Inventor: Willi Nieratschker
  • Patent number: 4784578
    Abstract: The metering device for a liquid medium comprises a cylinder and a piston operatively disposed therein to define a metering chamber ahead of the piston. The outlet end of the cylinder is open and closed by check valve means. The piston is driven forwardly through a working stroke to force the liquid medium in the metering chamber out of the chamber and past the check valve means. The piston breaks the plane of the open end of the cylinder on each working stroke to preclude entrapment of air in the metering chamber and thus provide for more accurate metering.
    Type: Grant
    Filed: February 29, 1988
    Date of Patent: November 15, 1988
    Assignee: Oil-Rite Corporation
    Inventor: Donald G. Gruett
  • Patent number: 4784584
    Abstract: The metering device for a liquid medium comprises a cylinder and a piston operatively disposed therein to define a metering chamber ahead of the piston. The outlet end of the cylinder is open and closed by check valve means. The piston is driven forwardly through a working stroke to force the liquid medium in the metering chamber out of the chamber and past the check valve means. The piston breaks the plane of the open end of the cylinder on each working stroke to preclude entrapment of air in the metering chamber and thus provide for more accurate metering.
    Type: Grant
    Filed: July 17, 1987
    Date of Patent: November 15, 1988
    Assignee: Oil-Rite Corporation
    Inventor: Donald G. Gruett
  • Patent number: 4735048
    Abstract: The hydraulic tool of this invention includes a pressure chamber into which a fluid is pumped. A pump chamber has an inlet port and outlet port at opposite ends thereof and a pump plunger extends into the chamber with an annular space around it. An annular shoulder is provided on either the chamber or the plunger and a seal ring or sleeve fits slidably on the other component to seal against the shoulder. A spring biases the seal ring against the shoulder, and when the pump is extended to force fluid out the outlet port, the pressure in the chamber augments the spring force. Then, when the rod is retracted to create a void, fluid in the reservoir forces the seal ring or sleeve away from the seat surface to enter the inlet port.
    Type: Grant
    Filed: October 24, 1986
    Date of Patent: April 5, 1988
    Assignee: The Gregory Company
    Inventor: Jack T. Gregory
  • Patent number: 4673000
    Abstract: An O-ring is received in a groove having only an arcuate portion thereof operative to act as a check valve, with the arcuate portion being movable into a chordal recess so that it does not provide full circumferential sealing engagement in the area of the arcuate portion, allowing fluid pressure or flow therethrough so long as the arcuate portion is so displaced. The resilient character of the O-ring urges the arcuate portion back to the closed position along a tapered ramp surface of the recess into which it was displaced when there is no pressure differential acting across the O-ring. Movement of the O-ring support member relative to a fixed surface normally sealed by the O-ring and net pressure forces on the O-ring may also tend to return the O-ring to the closed position in one direction of movement.
    Type: Grant
    Filed: July 18, 1986
    Date of Patent: June 16, 1987
    Assignee: General Motors Corporation
    Inventors: Timothy A. Haerr, Donald L. Parker
  • Patent number: 4607765
    Abstract: A manually operated pump for the delivery under pressure in micronized form of liquid and/or thick substances or materials stored in a container on which the pump is mounted. The pump comprises a main hollow body, a movable hollow stem supporting a micronizing cap and extending into a pressure chamber defined by the hollow body, a spring urging the stem away from said chamber against a retaining element integral with the hollow body, a one-way valve sealingly bearing on a seat on the lower end of the chamber, an annular seal movable along the stem between two positions in which it clears and respectively it closes a channel in the stem opening into the axial cavity of the same stem, said seal sealingly engaging the inner surface of the hollow body and the outer surface of the stem.
    Type: Grant
    Filed: February 19, 1985
    Date of Patent: August 26, 1986
    Assignee: S.A.R. S.p.A.
    Inventor: Tommaso Ruscitti
  • Patent number: 4599054
    Abstract: A travelling valve assembly for use in a sucker rod actuated fluid pump includes a ball valve actuator which engages the ball valve during the downstroke of the sucker rod to force the ball valve into an open fluid transmitting relationship with respect to its valve seat.
    Type: Grant
    Filed: August 23, 1984
    Date of Patent: July 8, 1986
    Inventor: Harry L. Spears
  • Patent number: 4552515
    Abstract: A tube pump for use in pumping a liquid from one place, such as a tank, to another, such as a vessel, the tube pump comprising a first tube for sucking a liquid from a tank; a second tube for allowing the sucked liquid to discharge therethrough; a connecting chamber located in the joint of the first and the second tube, where these two tubes are communicated with each other; a bellows member communicating with the connecting chamber, the bellows member being adapted to be gripped by the user's hand; the bellows member having an opening closable by a valve member; the valve member including a cap having an aperture in its center, and a cover including a stem slidably passed through the aperture, wherein the aperture is airtightly closed by the stem when no force acts on the cover but is opened when the cover is pushed downwards.
    Type: Grant
    Filed: September 5, 1984
    Date of Patent: November 12, 1985
    Inventor: Tsuyoshi Endo
  • Patent number: 4534715
    Abstract: A traveling valve assembly is provided for use in subsurface gravity type pumping systems and is responsive to reciprocating motion to manipulate a rotary valve head relative to a valve seat between open and closed positions, and to fluid pressure to manipulate a ball member and a slidable seal member relative to seat members between open and closed positions. Reciprocating motion is converted to rotary motion by means of a journaled spiral groove portion of the rotary valve member. The traveling valve assembly is provided with multiple seals to prevent high pressure gas from blowing through the pump when pumping oil.
    Type: Grant
    Filed: August 17, 1983
    Date of Patent: August 13, 1985
    Inventor: Roy C. Jones
  • Patent number: 4531896
    Abstract: A fluid pump for raising petroleum fluids through production tubing in completed oil wells includes a mechanically actuated travelling valve, which is rotated via longitudinal movement within the housing of a travelling valve actuator member.
    Type: Grant
    Filed: March 19, 1984
    Date of Patent: July 30, 1985
    Inventor: Harry L. Spears
  • Patent number: 4518328
    Abstract: In a piston for a piston pump including a stopper and a flange fittedly mounted on one end of the piston rod effecting a reciprocating strokes within a cylinder, a reinforcing ring member is fitted between a suction side of a piston packing and a piston member, so that the piston packing can not be forced out when a high pressure is exerted thereon. Also, friction of the piston member relative to the cylinder, which would lead to wear of such members, can be avoided, and in the event that the packing is worn, the airtightness between the piston member and the cylinder can be maintained by the reinforcing ring.
    Type: Grant
    Filed: July 11, 1983
    Date of Patent: May 21, 1985
    Assignee: Kabushiki Kaisha Murayama Seisakusho
    Inventor: Kiyoshi Nemoto
  • Patent number: 4436494
    Abstract: A plunger pump wherein a bellows is provided between the plunger and the plunger case to thereby protect a slide surface of the plunger from a pressure-fed fluid such as inorganic paint, zinc rich paint.In this plunger pump, the pressure-fed fluid is allowed to flow between the outer surface of the bellows and the inner surface of the plunger case, only the removal of the plunger after use can expose the outer surface of the bellows so as to facilitate removing the pressure-fed fluid such as the coating composition including paint and cleaning the bellows, and moreover, the effective diameter of the bellows is made equal in value to the outer diameter of a portion, which is slidable on the plunger case and projected into a portion communicated with the interior of the bellows so as to eliminate an occurrence of an unusual deformation of the bellows.
    Type: Grant
    Filed: October 29, 1981
    Date of Patent: March 13, 1984
    Assignee: Nagano Keiki Seisakusho, Ltd.
    Inventor: Kazuo Yamaizumi
  • Patent number: 4435135
    Abstract: A hand-actuatable pump assembly is adapted to be sealingly secured to the mouth of a container for dispensing material in the container. The pump assembly includes a generally tubular adapter that defines a discharge passageway. A spray member is seated on the adapter and defines a discharge opening in communication with the passageway. A stem defines a tubular portion that is secured to the adapter. A valve body defines a pressure chamber. A piston sealingly and slidably engages the wall of the valve body. The piston comprises a first portion that is clamped between the stem and the adapter, and a second deflectable portion in sealing engagement in a position of rest with the stem, and being out of sealing engagement with the stem in a second position of actuation. The deflectable portion of the piston is deflectable in response to hydraulic pressure upon movement of said piston downwardly into the valve body to expose the passageway to communication with the pressure chamber.
    Type: Grant
    Filed: April 3, 1981
    Date of Patent: March 6, 1984
    Assignee: Seaquist Valve Company
    Inventor: Michael G. Knickerbocker
  • Patent number: 4363426
    Abstract: A device for conveying and dispensing liquid media such as casting resin has at least one piston pump having a cylinder chamber which forms a seal for a piston therein which is connected via an input opening to a feed container for receiving a supply of liquid therefrom. The cylinder chamber has an output opening and the piston is tubular in form having wall perforations in the region of the input opening for admitting the liquid to the interior of the piston and has a valve at a discharging end thereof for exit of the liquid from the piston. A seal is thus formed by which the piston operates entirely surrounded by the liquid medium to be dispensed and external seals between the piston and the atmosphere are eliminated.
    Type: Grant
    Filed: October 6, 1980
    Date of Patent: December 14, 1982
    Assignee: Siemens Aktiengesellschaft
    Inventors: Alfred Heinzl, Heinz Stadler
  • Patent number: 4265087
    Abstract: The hydraulic brake booster power piston has a rectangular cross section seal groove containing a rectangular cross section lathe cut seal having a greater inner diameter than the groove as well as a greater outer diameter. Radial clearance is provided between the piston and the cylinder wall. The groove has one or more holes at its inner diameter opening axially into the booster power pressure chamber. The seal is also axially thinner than the groove. Power pressure holds the seal in sealing relation with the cylinder wall and the piston. When fluid must flow from the exhaust chamber side of the piston to the power chamber side (e.g. during manual no-power operation) the seal moves to the other groove side, allowing flow radially inward in the groove and past the seal inner periphery through the hole or holes to the power chamber.
    Type: Grant
    Filed: October 11, 1979
    Date of Patent: May 5, 1981
    Assignee: General Motors Corporation
    Inventor: Denny L. Peeples
  • Patent number: 4255830
    Abstract: There is disclosed a handle for attachment to a pump stem on liquid fuel appliances. The handle detachably connects to the pump stem for easier manipulation during pumping to pressurize fuel in the appliance tank.
    Type: Grant
    Filed: December 26, 1979
    Date of Patent: March 17, 1981
    Inventor: G. Kevin Wilson
  • Patent number: 4249868
    Abstract: A pump for pumping high viscosity lubricants such as wheel bearing grease comprising a pump tube adapted to be disposed within a container of the lubricant, a piston rod and piston movable within the tube, an outlet at the upper end of the tube, an inlet at the lower end, a check valve in the piston and a valve at the inlet. Upon the piston downstroke, the inlet is closed by the valve and lubricant is transferred through the check valve in the piston from below to above the piston. Upon the piston upstroke, lubricant above the piston is forced out the outlet and lubricant is drawn into the tube below the piston through the then open inlet. The inlet valve is constructed so that it cooperates with the piston to develop a vacuum at the inlet before the inlet is opened. Upon opening the inlet, there is then a sudden exposure of the lubricant surrounding the inlet to the vacuum which draws even high viscosity lubricant into the tube to prime it. Reliable pump priming is thus achieved.
    Type: Grant
    Filed: February 5, 1979
    Date of Patent: February 10, 1981
    Assignee: McNeil Corporation
    Inventor: Jeffery M. Kotyk
  • Patent number: 4221551
    Abstract: A sliding valve pump for oil wells which includes a working barrel having a plurality of apertures located in spaced relationship in the wall thereof and a pair of travelling valves fitted within the working barrel and carried by a plunger rod, the valves also having a plurality of apertures or ports for periodic registration with the ports in the working barrel wall to facilitate pumping of fluid from an oil reservoir or pool to the surface. The pump is designed to pull the oil-gas mixture from the reservoir pool into the lower section of the working barrel on the downward stroke, and to subsequently pump the collected oil through the barrel and tubing upwardly toward the surface on the upward stroke.
    Type: Grant
    Filed: June 26, 1978
    Date of Patent: September 9, 1980
    Inventor: Clement L. Rupert
  • Patent number: 4120619
    Abstract: A reciprocating pump for dispensing fluent substances comprises a piston slidable in a cylinder and defining a substance-trapping space at the inner end of the cylinder. Inlet and outlet ports are formed in the piston and connect with the space under the control of a tubular sleeve mounted on a reduced diameter inner end portion of the piston and capable of limited axial movement relative to the piston. Frictional engagement of the sleeve with the wall of the cylinder holds the sleeve stationary upon initial reciprocation of the piston within the cylinder and the piston slides through the sleeve to switch over the porting connections. During the subsequent portion of the stroke of the piston the sleeve and piston move as a unit.
    Type: Grant
    Filed: August 29, 1977
    Date of Patent: October 17, 1978
    Assignee: Sterling-Winthrop Group Limited
    Inventor: Trevor William Blackband
  • Patent number: 4119244
    Abstract: An arrangement has a hand-operated piston pump mountable on a neck of a bottle, and having a first portion outwardly embracing the neck and a second portion inwardly extending into the neck of the bottle. The first portion of the piston pump overlaps the neck over at least a part of its height and is supported by the same. The second portion is formed as a ring-shaped collar. For sealingly connecting the second portion to the neck of the bottle, there is provided as a rubber stopper located between the outer surface of the second portion of the piston pump and the inner surface of the neck of the bottle. The second portion may be provided with an inner thread which can mesh with an outer thread of the neck serving for screwing on a threaded cap. A member is further provided for detachably connecting a drink container to the arrangement so that the liquid withdrawing from the bottle travels directly into the container.
    Type: Grant
    Filed: March 17, 1977
    Date of Patent: October 10, 1978
    Assignee: Gebruder Funke
    Inventor: Peter Funke
  • Patent number: 4106392
    Abstract: A hand-operated pump includes a cylinder and a reciprocating plunger. The plunger is made from plastic and includes a piston, a stem and an enlarged hand grip which are all molded integrally with one another so as to form a one-piece unit. The end of the cylinder is closed by a pair of separable caps which are adapted to be slipped sidewise onto the plunger and attached to the cylinder after the plunger has been assembled with the cylinder.
    Type: Grant
    Filed: February 3, 1977
    Date of Patent: August 15, 1978
    Assignee: Johnson Enterprises, Inc.
    Inventors: Arthur L. Johnson, Jr., Marlow W. Dodge
  • Patent number: RE38291
    Abstract: New A plunger having a cylindrical hollow body 20 or 20B , a handle 30, 30A, or 30B , an outlet hose 40 , an outlet tip 42 , and a valve or flap 50, 60, or 70 structure that is able to controls the air flow within the hollow 25 portion of the cylindrical body 20 or 20B is shown. The valve or flap 50, 60, or 70 structure is moved into a closed position so that air is forced out of the front of the plunger and towards a clogged or stopped area 82 or 92 and is moved into an open position so that air enters the back of the plunger and passes proceeds past the valve or flap 50, 60, or 70 structure, so that water and/or clogging material is not drawn or sucked into the interior of the plunger. F The hose attached to the cylindrical body is flexible and is smaller in diameter than the drain throat of a plumbing fixture allowing the hose to be placed into a clogged area.
    Type: Grant
    Filed: July 27, 2001
    Date of Patent: October 28, 2003
    Inventors: Craig A. Kennedy, Daniel L. Poole