Valved Piston Patents (Class 417/545)
  • Patent number: 10830220
    Abstract: A high pressure fuel pump includes a pumping head and a plunger slidably adjusted in a bore. The plunger is provided with a blind bore defining a chamber open in the head end of the plunger and in fluid communication with the compression chamber, the end face of the plunger being limited to a peripheral annular face surrounding the opening, the bore further defining a peripheral cylindrical wall and a bottom face. A filler member is arranged inside the chamber.
    Type: Grant
    Filed: April 20, 2017
    Date of Patent: November 10, 2020
    Assignee: DELPHI TECHNOLOGIES IP LIMITED
    Inventors: Paul F. Garland, Toby Pedley, Matthew Fairbairn
  • Publication number: 20150110657
    Abstract: In order to enable a continuous adjustment of the variable clearance space (1) of a reciprocating compressor (15), a threaded spindle drive with a threaded spindle nut (10) and a threaded spindle (9) is provided as an adjusting device (7), wherein the threaded spindle nut (10) is embodied as a plastic nut (20) with internal thread (24), the plastic nut (20) is arranged with an external thread (23) on an internal thread (22) of a nut carrier (21) of the threaded spindle nut (10), and the thread height (y) of the internal thread (22) of the nut carrier (21) and the thread height (x) of the external thread (25) of the threaded spindle (9) is respectively embodied with 50 to 80% of the radial thickness (d) of the plastic nut (20) and the plastic thickness is at least 15% of the thread pitch (z1) of the internal thread (24) at least in the region of the thread flanks (26) of the internal thread (24) of the plastic nut (20).
    Type: Application
    Filed: October 7, 2014
    Publication date: April 23, 2015
    Applicant: HOERBIGER KOMPRESSORTECHNIK HOLDING GMBH
    Inventors: Bernhard Spiegl, Matthias Kornfeld, Andreas Schloffer
  • Patent number: 9011118
    Abstract: An air compressor with enhanced air compressing effect comprises a mounting chassis with a coupling aperture, a piston having a piston rod with a crankpin linking bore and a piston head with an air acting face, a cylinder having an air chamber with an inner top wall, and a driving mechanism including a motor having a shaft and a rotational crank cam with an eccentric crankpin. The coupling aperture on the mounting chassis is bias disposed relative to the axial line of the cylinder. Both of the air acting face on piston head and inner top wall in cylinder are configured into corresponding slant planar surface. The eccentric crankpin on the crank cam pivotally links the crankpin linking bore on the piston rod of the piston so that rotary motion of the crank cam is converted into linear reciprocating motion. Thus, air compressing effect is substantially enhanced.
    Type: Grant
    Filed: November 21, 2011
    Date of Patent: April 21, 2015
    Inventor: Wen-San Chou
  • Patent number: 8858189
    Abstract: A pumping device includes a barrel (1), a top cover (2), a switching valve (3), a cylinder (4), a piston (53), a connecting unit (6), an operation unit (5), a delivery unit (7), a pressure gauge (8), and a pressure release unit (9). Thus, the user has to pull or push the switching valve to extract or suck the air in the barrel so as to deflate or inflate the barrel so that the pumping device has a security process and is operated in a safer manner. In addition, the flow of the fluid is proceeded in the barrel so that the pumping device is operated smoothly and conveniently.
    Type: Grant
    Filed: October 12, 2011
    Date of Patent: October 14, 2014
    Inventor: Kun-Wang Wang
  • Patent number: 8833101
    Abstract: Apparatus for use as a heat pump includes compression chamber means, inlet means for allowing gas to enter the compression chamber means, compression means for compressing gas contained in the compression chamber means, heat exchanger means for receiving thermal energy from gas compressed by the compression means, expansion chamber means for receiving gas after exposure to the heat exchange means, expansion means for expanding gas received in the expansion chamber means, and exhaust means for venting gas from the expansion chamber means after expansion thereof.
    Type: Grant
    Filed: January 10, 2012
    Date of Patent: September 16, 2014
    Assignee: Isentropic Ltd.
    Inventors: Jonathan Sebastian Howes, James Macnaghten
  • Publication number: 20140099224
    Abstract: A piston pump which permits advantageous operation over both short stroke piston movement and long stroke piston movement.
    Type: Application
    Filed: March 13, 2013
    Publication date: April 10, 2014
    Applicant: GOTOHTI.COM INC.
    Inventors: Heiner Ophardt, Andrew Jones, Zhenchun (Tony) Shi
  • Patent number: 8602751
    Abstract: A transfer pump includes a motor that attaches to a manifold with a motor mount that seals a top end of the manifold. The motor mount includes a tubular portion that extends into and threadably engages the manifold, to cooperatively define a channel therethrough. The manifold includes a plurality of inlet ports arranged generally in an annular pattern. An inner cylinder attaches to the manifold from below, disposed radially inward from the inlet ports, and a pressure cylinder attaches to the manifold, disposed radially outward from the inlet ports. The pressure cylinder includes a foot valve. A pump shaft extends from the motor, through the channel, and into the pressure cylinder. A large piston with a check valve is attached to the distal end of the shaft, and a small piston disposed in the inner cylinder is attached at an intermediate location.
    Type: Grant
    Filed: February 2, 2011
    Date of Patent: December 10, 2013
    Assignee: International Pump Manufacturing Inc.
    Inventor: John P. Courier
  • Publication number: 20130302195
    Abstract: A foam pump including a housing and a piston that reciprocates within the housing is disclosed herein. The piston has a hollow portion and an orifice through the wall of the piston. A first seal located proximate the upper end of the piston provides a seal between the piston and the housing. A liquid inlet is located in the side wall of the housing at a point lower than the top of the piston. A one-way liquid inlet valve is located proximate the liquid inlet and a one-way liquid outlet valve is located prior to the liquid outlet. A charge chamber is defined at least in part by the liquid inlet valve, the liquid outlet valve, a wall of the piston and a wall of the housing.
    Type: Application
    Filed: March 8, 2013
    Publication date: November 14, 2013
    Applicant: GOJO Industries, Inc.
    Inventors: John J. McNulty, Robert L. Quinlan, Nick E. Ciavarella, Carrie Anne Zapka, David J. Shumaker
  • Publication number: 20130287597
    Abstract: The present application relates generally to pumps, and more particularly to piston type pumps having increased energy efficiency, systems incorporating such piston type pumps, and methods of operating piston type pumps.
    Type: Application
    Filed: March 15, 2013
    Publication date: October 31, 2013
    Applicant: Hydro Pacific Pumps Inc.
    Inventor: Hydro Pacific Pumps Inc.
  • Patent number: 8523541
    Abstract: The invention relates to a one-piece plastic element having an inlet valve cover and an inlet valve seat element for an inlet valve of a piston pump of a hydraulic brake system of a motor vehicle. The inlet valve is designed as a check valve, and the inlet valve cover and the inlet valve seat element are connected to each other by a designed fracture point. The invention further relates to a piston pump having an inlet valve cover and inlet valve seat element made of a one-piece plastic element. The invention further relates to a method for assembling the inlet valve designed as a check valve.
    Type: Grant
    Filed: October 13, 2008
    Date of Patent: September 3, 2013
    Assignee: Robert Bosch GmbH
    Inventor: Harald Hermann
  • Publication number: 20130195685
    Abstract: Embodiments of the present disclosure generally provide a disc-valve design with a self-cleaning feature. The self-cleaning feature may be integrated into the valve, for example, by removing a “cut-out” portion between sealing surfaces of ports. These cut-out portions may create vortices that might clean debris from the sealing surfaces. The cut-outs may also provide a place for debris to collect-keeping it away from the sealing surfaces. In addition, or as an alternative to cut-outs, some other type of mechanism, such as sealing members designed to disturb flow to sweep away debris near a sealing surface or helical grooves (rifling) formed in the ports, may also be used to promote self-cleaning.
    Type: Application
    Filed: February 1, 2013
    Publication date: August 1, 2013
    Applicant: WEATHERFORD/LAMB, INC.
    Inventor: WEATHERFORD/LAMB, INC.
  • Patent number: 8491287
    Abstract: A piston pump includes a pump mechanism configured to compress fluid sucked from an inlet port by increasing or decreasing a volume of a pump chamber which faces a front end of a piston by reciprocating the piston housed in a housing, a feed mechanism including a feed ring mounted to an annular groove provided at an outer periphery of the piston and following a motion of the piston, a feed chamber formed between the feed ring and the housing, and a valve portion. The piston pump includes a pressure wall provided at the piston and configured to contact the feed ring to axially move the feed ring, and a restriction portion provided at the feed ring and configured to engage with an outer periphery of the piston at a position approximate to the pressure wall for restricting a radial displacement of the feed ring on the piston.
    Type: Grant
    Filed: February 16, 2010
    Date of Patent: July 23, 2013
    Assignee: Advics Co., Ltd.
    Inventors: Kazuyuki Murai, Tomoo Harada
  • Publication number: 20130156622
    Abstract: A pneumatic tool includes a housing, an air cylinder disposed in the housing, a valve unit, and a controlling unit. The air cylinder has an outer surface formed with a valve seat. A rotary valve of the valve unit is rotatable to allow compressed air to flow into the air cylinder through a selected one of first and second passages to thereby produce clockwise or counterclockwise rotation of the tool. The controlling unit includes a movable pin operable to move in the housing to drive rotation of the rotary valve. Preferably, the valve unit is disposed on the housing in a manner that the space occupied thereby in the housing is reduced.
    Type: Application
    Filed: December 12, 2012
    Publication date: June 20, 2013
    Applicant: BASSO INDUSTRY CORP.
    Inventor: Basso Industry Corp.
  • Publication number: 20130146500
    Abstract: The present invention relates to a vacuum container. The vacuum container includes a piston member linearly movably disposed in a receiving portion which is formed at the vacuum container and has a first outlet and provided with a second outlet, an elastic member disposed in the piston member, a first valve plate disposed in the receiving portion and adapted to open or close the first outlet, a second valve plate disposed at the piston member and adapted to open or close the second outlet, a separation preventing plate mounted in the receiving portion and preventing separation of the piston member, and a unit for pressuring the first valve plate which is mounted in the receiving portion and is adapted to close the first outlet by pressurizing the first valve plate if the piston member descends and is caught by and fixed to the separation preventing plate. Thereby, vacuum state can be continuously maintained in the vacuum container.
    Type: Application
    Filed: August 5, 2010
    Publication date: June 13, 2013
    Inventor: Yong-Kug Kim
  • Patent number: 8444400
    Abstract: A hydraulic cylinder is disclosed. The hydraulic cylinder may have a tube, and a piston disposed within the tube and having a bore passing through the piston. The hydraulic cylinder may also have a valve element disposed within the bore and having a length shorter than a length of the bore. The valve element may be mechanically movable to allow fluid flow through the bore, and hydraulically movable to inhibit fluid flow through the bore.
    Type: Grant
    Filed: February 13, 2009
    Date of Patent: May 21, 2013
    Assignee: Caterpillar Inc.
    Inventor: Rabie E. Khalil
  • Patent number: 8444401
    Abstract: A check valve for arranging between a first pressure chamber, in which a first pressure prevails, and a second pressure chamber in which a second pressure prevails. The valve comprises a valve housing on which a valve seat is formed, and comprises a blocking element which is designed in a blocking position, to close a valve opening in the region of the valve seat, in order to block a connection between the first and the second valve chambers, and is designed in an open position to release the valve opening in order to release the connection between the first and the second valve chambers. The valve seat is configured as an oblique surface, which relative to the flow direction is aligned at an angle which is greater than 15° and less than 80°. The blocking element comprises a planar blocking lobe made from an elastically deformable material which in the blocking position bears against the oblique surface, and in the open position lifts away from the oblique surface in order to release the connection.
    Type: Grant
    Filed: July 13, 2010
    Date of Patent: May 21, 2013
    Inventors: Peter Borst, Markus Engel
  • Publication number: 20130101442
    Abstract: Provided are an air suction pump and a method of vacuum sealing vinyl bag using same. The air suction pump includes a base member, a housing mounted on a top of the base member to be movable in a vertical direction, a piston member disposed inside the housing to be movable in the vertical direction, a first heating wire mounted to be exposed to the outside on one or more of the top of the base member, the bottom of the housing, and a bottom of the piston member, and a power supply part supplying power to the first heating wire. A top of the housing is opened and a bottom of the housing is opened. A top of the piston member is exposed to the outside through the top of the housing. The air suction pump discharges the internal air of a vinyl bag, applies vacuum into the vinyl bag, and immediately seals the vinyl bag, thus enabling food of the vinyl bag to be easily kept in a vacuum state for a long time.
    Type: Application
    Filed: November 12, 2010
    Publication date: April 25, 2013
    Applicant: ZEROPACK. CO., LTD.
    Inventor: Jun-Young Ann
  • Patent number: 8419376
    Abstract: A pumping device includes a barrel, a top cover mounted on the top of the barrel, a first switching valve mounted on the top cover, a base mounted on the bottom of the barrel, a second switching valve mounted on the base, a cylinder connected between the top cover and the base, a piston movably mounted in the cylinder, a plurality of check valves mounted on the piston, an operation unit connected with the piston, and a conduit connected between the barrel and the base. Thus, a user has to pull or push the first switching valve and the second switching valve simultaneously to extract or suck the fluid in the barrel so as to deflate or inflate the barrel so that the pumping device has a security process and is operated in a safer manner.
    Type: Grant
    Filed: October 29, 2010
    Date of Patent: April 16, 2013
    Inventor: Shu-Ju Sun
  • Patent number: 8419377
    Abstract: A pumping device includes a barrel, a top cover mounted on an open top of the barrel, a cylinder mounted in the barrel and connected to the top cover, a piston movably mounted in the cylinder, a plurality of check valves mounted on the piston, an operation unit mounted on the top cover and connected with the piston, a connecting unit mounted in the barrel and connected between the barrel and the cylinder, and a pressure adjusting unit connected between the barrel and the top cover. Thus, when the air pressure in the receiving chamber of the barrel reaches a predetermined value, the pressure adjusting unit provides a pressure release function to partially release the air pressure in the receiving chamber of the barrel so as to ensure a safe operation of the pumping device.
    Type: Grant
    Filed: November 2, 2010
    Date of Patent: April 16, 2013
    Assignee: Crafts & Carriers Taiwan Inc.
    Inventor: Mei-Chin Hsu
  • Patent number: 8414276
    Abstract: The invention relates to a piston pump for a vehicle braking system, with a housing section and a piston, which is guided in the housing section in a slidable manner. An accommodating member for accommodating an intake valve is provided in the housing section, and a sealing element adjoins the accommodating member to seal the piston against the housing section. A piston rod adjoins the sealing element which is embodied in one piece with the accommodating member.
    Type: Grant
    Filed: May 22, 2007
    Date of Patent: April 9, 2013
    Assignee: Robert Bosch GmbH
    Inventors: Wolfgang Schuller, Marc Zimmermann
  • Patent number: 8388326
    Abstract: A piston pump assembly includes a first pump having a first cylinder member inserted in a piston hole of a pump housing, and a first piston inserted in the first cylinder member, and a second pump having a second cylinder member inserted in the piston hole, and an annular second piston slidably fitted in an annular groove formed in the outer periphery of the first piston, and also axially slidably inserted in the second cylinder member. The first cylinder member axially presses the second cylinder member, thereby preventing the second cylinder member from being dropped out of the piston hole. The second cylinder member has an annular seal surface in contact with a shoulder surface formed on the inner periphery of the piston hole. Strain-absorbing protrusions are formed on the end of the second cylinder member in abutment with the first cylinder member. The protrusions are compressed when they are pressed by the first cylinder member.
    Type: Grant
    Filed: September 15, 2010
    Date of Patent: March 5, 2013
    Assignee: Advics Co., Ltd.
    Inventors: Atsushi Sumimoto, Tomoo Harada
  • Patent number: 8388325
    Abstract: The invention relates to a piston pump for a vehicle braking system, having a housing section and a piston that is displacably guided into the housing section. A receiving cap is provided for receiving an inlet valve. A sealing element is connected to the receiving cap for sealing the piston and a piston rod that is joined to the sealing element. The piston rod has a first and a second piston rod element. In the first piston rod element, a fluid inlet for introducing the fluid into the inside of the piston is provided. The second piston rod element partially covers the fluid inlet in the axial direction of the piston.
    Type: Grant
    Filed: September 25, 2007
    Date of Patent: March 5, 2013
    Assignee: Robert Bosch GmbH
    Inventors: Oliver Schmautz, Marc Zimmermann
  • Patent number: 8366422
    Abstract: A metering pump for feeding out viscous materials, which pump comprises a housing having an inlet connectable to a viscous material source, an outlet; and a valve body of cylindrical basic shape, which is rotatable into at least two positions by means of a drive unit including a first position allowing a flow of the material from the inlet to the housing and a second position allowing a flow of the material from the housing to the outlet. The pump also comprises a cylinder device connected to the housing, having a controllable piston intended to achieve the flow of material, and at least one device for cleaning the metering pump. The cleaning device comprises at least one nozzle for cleaning agent, disposed in a valve-body-facing part of the piston. Also, a method for cleaning such a metering pump.
    Type: Grant
    Filed: September 9, 2007
    Date of Patent: February 5, 2013
    Assignee: Norden Machinery AB
    Inventor: Jan Sjögren
  • Patent number: 8360743
    Abstract: A rotary pressure production turbine for pressurizing a hydraulic fluid is disclosed comprising a plurality of piston assemblies. Each piston assembly comprises a hollow needle piston shaft having through which hydraulic fluid is moved from a low pressure volume to a high pressure volume as the piston shaft moves in a first direction. A rotary actuator actuates each piston shaft. From the high pressure volume, hydraulic fluid is moved to a common high pressure header and delivered to an aspirated accumulator where the fluid can be stored and subsequently utilized. In some embodiments, the fluid is utilized to operate an electric generator for use in a hybrid-electric vehicle. In some embodiments, the rotary actuator is driven by an internal combustion engine, while in others the rotary actuator is driven by a vehicle drive train in a regenerative braking application.
    Type: Grant
    Filed: January 22, 2010
    Date of Patent: January 29, 2013
    Inventor: Randall W. Walters
  • Patent number: 8353691
    Abstract: A piston pump for the hydraulic energy supply in a motor vehicle, comprising a piston that is movably arranged in a stepped bore of an accommodating member that is provided with a closure, the piston carries a seat for an elastic sealing element which accommodates the sealing element with axial play, and with radial elastic preload for the purpose of sealing between piston and cylinder. The seat for the sealing element has a structure which generates forces pointing radially towards a piston axis and expanding the sealing element in a radial direction, and that the structure produces an elastic deformation of the sealing element for an increased and dosed sealing contact pressure between piston and cylinder.
    Type: Grant
    Filed: September 8, 2006
    Date of Patent: January 15, 2013
    Assignee: Continental Teves AG & Co., oHG
    Inventors: Georg Sonnenschein, Georg Obersteiner, Jurgen Uhlmer, Achim Possmann, Andreas Hettrich
  • Patent number: 8272858
    Abstract: The invention relates to a piston pump for conveying fluids. The piston pump includes a piston, and a pressure chamber located between an intake valve and a discharge valve. The intake valve is arranged between the pressure chamber and a low-pressure zone of the piston pump. The intake valve has a valve body, a closing element, a device for preloading the closing element, and a device for fastening the intake valve to the piston. The fastening device encompasses at least two fastening elements which protrude from the valve body toward the piston. The fastening elements are positioned at a distance from one another, and are fitted with inlets therebetween for supplying fluid. The invention further relates to a piston pump having an intake valve without a spring-biased element.
    Type: Grant
    Filed: May 22, 2007
    Date of Patent: September 25, 2012
    Assignee: Robert Bosch GmbH
    Inventors: Andre Bollwerk, Wolfgang Schuller, Horst Beling, Juergen Wagner, Michael Schuessler, Stefan Hallermann
  • Patent number: 8241020
    Abstract: The present invention relates to a piston pump. A piston with at least one transverse bore and a longitudinal blind bore, has a plate element with an opening, arranged on the piston at an opening of the longitudinal blind bore. The invention includes an inlet valve, an outlet valve, and a pressure chamber arranged between the inlet valve and the outlet valve. The inlet valve has a pretensioning element, a closing element, and a sealing seat, which sealing seat is built on the plate element.
    Type: Grant
    Filed: October 2, 2007
    Date of Patent: August 14, 2012
    Assignee: Robert Bosch GmbH
    Inventor: Marc Zimmermann
  • Patent number: 8230975
    Abstract: The invention relates to a device for feeding lubricating oil to an internal combustion engine. This device comprises a lubricating oil pump and an oil pressure regulating apparatus. The lubricating oil pump is designed as a reciprocating piston valve pump and the oil pressure regulating apparatus is designed as a multistage oil pressure regulating apparatus.
    Type: Grant
    Filed: February 11, 2006
    Date of Patent: July 31, 2012
    Assignee: Audi AG
    Inventors: Franz Lukas, Volker Verhees, Dieter Böhm
  • Patent number: 8226386
    Abstract: Once the production route by the tubing has been selected, the stem travels through the inside of a guide whose upper end has a diameter adjusted to that of a rod which develops, increasing until it is connected to a barrel. The upper part of a anchor is arranged in the lower part of the barrel. The lower part of the anchor is connected to a nipple fixed to a transfer box. The fluid passage from an admission valve to the barrel in the upward stroke and the emptying of the barrel in the downward stroke is linked at least with a connector disposed between a basket and the transfer box. The basket houses the ball and the seat of at least one production valve arranged together with at least one connector in a carrier body retained between the transfer box on the top and a cage at the bottom and fitted to a conduit. The admission valve is housed inside the cage and it is provided with a ball that releases or obstructs the fluid passage.
    Type: Grant
    Filed: March 27, 2009
    Date of Patent: July 24, 2012
    Inventor: Carlos Alberto Cifuentes
  • Patent number: 8215383
    Abstract: A stress and torque reducing tool has a plunger that reciprocates inside of a body. The tool is connected between the pump and the sucker rod string and reduces stress transmitted therebetween. The body and plunger have longitudinally extending surfaces located at the plunger upper end portion, which surfaces cooperate and limit rotation of the body with respect to the plunger. An upper fluid port is located in an upper end of the body, while one or more lower fluid ports are located in a lower end of the body.
    Type: Grant
    Filed: May 18, 2011
    Date of Patent: July 10, 2012
    Assignee: Harbison-Fischer, Inc.
    Inventor: Charles David Willis
  • Patent number: 8192182
    Abstract: A gastight interface for an evacuation device includes a flexible suction cup adapted to form a gastight seal with a surface surrounding a valve disposed on a container and extending from an evacuation end of an evacuation chamber. The flexible suction cup has an aperture disposed therethrough for fluid communication with the evacuation chamber. A plurality of support members extends from the evacuation end of the evacuation chamber to restrict movement of the flexible suction cup between the surface and the evacuation end of the evacuation chamber, to allow fluid communication between an interior of the container and the evacuation chamber through the valve when the valve is in an open position, while the piston is being reciprocated between the closed end and the evacuation end. Each support member has a distal surface disposed outside of an outer perimeter of the flexible suction cup.
    Type: Grant
    Filed: January 9, 2008
    Date of Patent: June 5, 2012
    Assignee: S.C. Johnson Home Storage, Inc.
    Inventors: William E. LeBoeuf, Raechell Maria Thuot, Leland J. Smith
  • Patent number: 8191733
    Abstract: An arrangement for dispensing color paste, a shading apparatus, a method, a computer program product, and a memory. The arrangement includes a piston pump including a feed channel. The feed channel is provided with a substantially different amount of color paste per travelling length unit when the piston is moving towards the first end of the cylinder than when the piston is moving towards the second end of the cylinder. The arrangement further includes a valve connected to the feed channel, a dispensing channel connected to a first outlet channel of the valve for conveying color paste into a can, and a by-pass feed channel connected to a second outlet channel of the valve for conveying color paste past the can for the paint to be shaded.
    Type: Grant
    Filed: May 5, 2009
    Date of Patent: June 5, 2012
    Assignee: CPS Color Equipment Oy
    Inventor: Tapio Seppänen
  • Patent number: 8186976
    Abstract: A combination compressor and vacuum pump apparatus comprising a common drive mechanism, a compressor piston-cylinder unit mechanically coupled to the drive mechanism, the compressor piston-cylinder unit comprising a hollow first piston rod connected to the drive mechanism at a first free end substantially opposite a first piston operable within a first cylinder so as to form the compressor piston-cylinder unit, and a vacuum pump piston-cylinder unit mechanically coupled to the drive mechanism, the vacuum pump piston-cylinder unit comprising a hollow second piston rod connected to the drive mechanism at a second free end substantially opposite a second piston operable within a second cylinder so as to form the vacuum pump piston-cylinder unit, whereby air is pulled into the compressor piston-cylinder unit through the first piston rod for compression therein and air is exhausted from the vacuum pump piston-cylinder unit through the second piston rod.
    Type: Grant
    Filed: November 8, 2007
    Date of Patent: May 29, 2012
    Assignee: US Airflow
    Inventor: Morten A. Lund
  • Publication number: 20120107146
    Abstract: A pumping device includes a barrel, a top cover mounted on an open top of the barrel, a cylinder mounted in the barrel and connected to the top cover, a piston movably mounted in the cylinder, a plurality of check valves mounted on the piston, an operation unit mounted on the top cover and connected with the piston, a connecting unit mounted in the barrel and connected between the barrel and the cylinder, and a pressure adjusting unit connected between the barrel and the top cover. Thus, when the air pressure in the receiving chamber of the barrel reaches a predetermined value, the pressure adjusting unit provides a pressure release function to partially release the air pressure in the receiving chamber of the barrel so as to ensure a safe operation of the pumping device.
    Type: Application
    Filed: November 2, 2010
    Publication date: May 3, 2012
    Inventor: Mei-Chin Hsu
  • Publication number: 20120107161
    Abstract: A pumping device includes a barrel, a top cover mounted on the top of the barrel, a first switching valve mounted on the top cover, a base mounted on the bottom of the barrel, a second switching valve mounted on the base, a cylinder connected between the top cover and the base, a piston movably mounted in the cylinder, a plurality of check valves mounted on the piston, an operation unit connected with the piston, and a conduit connected between the barrel and the base. Thus, a user has to pull or push the first switching valve and the second switching valve simultaneously to extract or suck the fluid in the barrel so as to deflate or inflate the barrel so that the pumping device has a security process and is operated in a safer manner.
    Type: Application
    Filed: October 29, 2010
    Publication date: May 3, 2012
    Inventor: Shu-Ju Sun
  • Patent number: 8157538
    Abstract: An apparatus is provided and may include a compression mechanism, a valve plate associated with the compression mechanism and having at least one port in fluid communication with the compression mechanism, and a manifold disposed adjacent to the valve plate. A cylinder may be formed in the manifold and a piston may be disposed within the manifold and may be movable relative to the manifold between a first position separated from the valve plate and a second position engaging the valve plate. A valve element may be disposed within the piston and may be movable relative to the piston and the manifold. The valve element may be movable between an open position spaced apart from the valve plate and permitting flow through the port and into the compression mechanism and a closed position engaging the valve plate and restricting flow through the port and into the compression mechanism.
    Type: Grant
    Filed: July 22, 2008
    Date of Patent: April 17, 2012
    Assignee: Emerson Climate Technologies, Inc.
    Inventors: Frank S. Wallis, Mitch M. Knapke, Ernest R. Bergman
  • Patent number: 8147224
    Abstract: An air pump has a one-piece cylinder and a piston assembly. The one-piece cylinder has a body, a cap, a pedal and a base formed together by injection molding and welding process. The piston assembly is mounted in the one-piece cylinder and has a rod, a handle and a piston. The one-piece cylinder is structurally firm and provides excellent hermetic characteristics.
    Type: Grant
    Filed: April 29, 2009
    Date of Patent: April 3, 2012
    Assignee: Dongguan Tiger Point, Metal & Plastic Products Co., Ltd.
    Inventor: Chun-Chung Tsai
  • Patent number: 8087911
    Abstract: A pump of an electronically controlled brake system. The pump includes a bore formed in a modulator block and connected with a suction port and a discharge port, a piston installed in the bore in a reciprocating movable manner and defining an inlet path therein, an inlet valve to open or close an exit-side end of the inlet path according to a position of the piston, and an outlet valve provided at one side of the bore, operations of the inlet and outlet valves being contrary to each other. The outlet valve includes a valve seat, a sleeve to surround the valve seat, an outlet ball interposed between the sleeve and the valve seat and used to open or close a path defined in the valve seat, and a valve cap provided at one side of the sleeve to isolate an interior from an exterior of the bore. One or more of the valve sheet, sleeve, and valve cap are formed by press-forming, to achieve improved assembly efficiency and reduced manufacturing costs.
    Type: Grant
    Filed: June 10, 2009
    Date of Patent: January 3, 2012
    Assignee: Mando Corporation
    Inventor: Yong Kap Kim
  • Patent number: 8052402
    Abstract: A hand operated pump for generating negative and positive air pressure. The pump includes a pump body having a pump cylinder and a piston mounted for reciprocation in the cylinder. A selector valve communicates with the cylinder and is moveable between a positive-pressure position and a negative-pressure position. The arrangement is such that operation of an actuator to move the piston through a power stroke when the selector valve is in its negative-pressure position causes the pump to generate negative pressure at an outlet of the pump, and operation of the actuator to move the piston through a power stroke when the selector valve is in its positive-pressure position causes the pump to generate positive pressure at the outlet of the pump. A method of operating such a pump is also disclosed.
    Type: Grant
    Filed: October 20, 2008
    Date of Patent: November 8, 2011
    Assignee: Lincoln Industrial Corporation
    Inventors: Scott A. Sanders, Ayzik Grach
  • Patent number: 7993115
    Abstract: A pump including a bore formed in a modulator block and connected with a suction port and a discharge port is provided. The pump includes a piston installed in the bore in a reciprocating movable manner and defining an inlet path therein, an inlet valve to open or close an exit-side end of the inlet path according to a position of the piston, and an outlet valve provided at one side of the bore, operations of the inlet and outlet valves being contrary to each other. The outlet valve includes a valve seat, a sleeve to surround the valve seat, an outlet ball interposed between the sleeve and the valve seat and used to open or close a path defined in the valve seat, and a valve cap provided at one side of the sleeve to isolate an interior from an exterior of the bore.
    Type: Grant
    Filed: June 10, 2009
    Date of Patent: August 9, 2011
    Assignee: Mando Corporation
    Inventor: Yong Kap Kim
  • Patent number: 7967578
    Abstract: A piston type pumping apparatus comprises a vertically oriented cylinder having a top and a bottom with a first aperture. There are first and second passageways for liquid in the cylinder at the top and bottom respectively thereof. A piston is reciprocatingly mounted within the cylinder and has an area against which pressurized fluid acts in the direction of movement of the piston. A hollow piston rod is connected to the piston and extends below the piston and slidably through the first aperture. There is a reload chamber below the cylinder. The piston rod extends slidably into the reload chamber and has a third passageway for liquid communicating thereto. A first one-way valve is located in the third passageway. There is also a fourth passageway that extends from the reload chamber to a source of liquid to be pumped and a second one-way valve therein.
    Type: Grant
    Filed: January 27, 2005
    Date of Patent: June 28, 2011
    Inventors: Richard Frederick McNichol, Gordon Bryce
  • Patent number: 7950449
    Abstract: A stress and torque reducing tool has a plunger that reciprocates inside of a body. The tool is connected between the pump and the sucker rod string and reduces stress transmitted therebetween. The body and plunger have longitudinally extending surfaces located at the plunger upper end portion, which surfaces cooperate and limit rotation of the body with respect to the plunger. An upper fluid port is located in an upper end of the body, while one or more lower fluid ports are located in a lower end of the body.
    Type: Grant
    Filed: June 26, 2008
    Date of Patent: May 31, 2011
    Assignee: Harbison-Fisher, Inc.
    Inventor: Charles David Willis
  • Publication number: 20110115283
    Abstract: A sealing structure is provided wherein an annular groove formed in a pump cylinder of a piston pump receives therein a seal ring made of a synthetic resin material and having an inner circumferential surface fluid-tightly contacting an outer circumferential surface of the pump piston and an O-ring arranged on the outer circumferential side of the seal ring and urging the seal ring radially inward. The seal ring is formed at its axial end portions with flange portions for preventing the O-ring from coming off. In the state that the seal ring and the O-ring are fitted in the annular groove, the flange portions do not receive a load from the O-ring, and a surface pressure which the seal ring applies to the outer circumferential surface of the piston at an axial center portion thereof is set to be higher than surface pressures which it applies to the outer circumferential surface of the piston at axial end portions thereof.
    Type: Application
    Filed: November 12, 2010
    Publication date: May 19, 2011
    Applicant: ADVICS CO., LTD.
    Inventors: Tomoo HARADA, Tsunekazu Nishida
  • Patent number: 7886876
    Abstract: Apparatus and method for on-board lubrication of a paint pumping piston including a reservoir for lubricant and a lubricant dispensing mechanism for delivering a predetermined repeatable amount of lubricant upon manual actuation of the lubricant dispensing mechanism. In one embodiment, a section of tubing acts as the reservoir, and in another embodiment, the reservoir is formed by a transparent or translucent chamber located adjacent an aperture in a pump housing to enable visual inspection of the level of lubricant in the reservoir. A lubricant delivery piston is actuated by an extension thereof projecting through an aperture in the housing, and a lubricant discharge nozzle is located adjacent the paint pumping piston proximate a bushing supporting the paint pumping piston. A breather valve prevents a vacuum in the reservoir as the lubricant is dispensed.
    Type: Grant
    Filed: October 31, 2005
    Date of Patent: February 15, 2011
    Assignee: Wagner Spray Tech Corporation
    Inventors: Scott R. Carpenter, Robert D. Cooper, Jr., Stephen K. Liedtke
  • Publication number: 20100310394
    Abstract: A compressor unit having a cylinder and a piston, wherein the cylinder and the piston delimit a compressor chamber. The compressor unit also includes a capsule that surrounds at least the cylinder and the piston and a linear drive to drive a relative movement of the cylinder, the piston and the capsule. The compressor chamber has an outlet opening that opens into an interior of the capsule.
    Type: Application
    Filed: January 28, 2009
    Publication date: December 9, 2010
    Applicant: BSH BOSCH UND SIEMENS HAUSGERATE GMBH
    Inventors: Marco Giacchi, Bernd Gromoll
  • Publication number: 20100290939
    Abstract: Refrigerant compressor for a hermetically encapsulated small refrigerator, which has a piston (20) guided in a piston bore (3) of a cylinder housing (1), the cylinder housing being frontally terminated using a valve plate (7) having a pressure opening (17) and a suction opening (16) and also being frontally provided with holes (5), which each have a thread.
    Type: Application
    Filed: December 18, 2008
    Publication date: November 18, 2010
    Applicant: ACC Austria GmbH
    Inventor: Alfred Freiberger
  • Patent number: 7819636
    Abstract: An air pump operably by a motor to pump air is disclosed to include a body, an airbag unit, which is mounted in the body has multiple airbags each having an air chamber and an air inlet, a lifting mechanism rotatable by the motor to move the airbags to pump air, a plurality of air intake control valves movably set between the air inlet of each airbag and respective air inlets of the lifting mechanism to control the air passage between the air inlet of each airbag and the air inlets of the lifting mechanism subject to the operation status of the airbags, and an exhaust structure coupled to the airbag unit for exhaust of air from the airbags.
    Type: Grant
    Filed: December 12, 2006
    Date of Patent: October 26, 2010
    Assignee: Tricore Corporation
    Inventor: Tien-Chung Huang
  • Publication number: 20100209275
    Abstract: A hydraulic cylinder is disclosed. The hydraulic cylinder may have a tube, and a piston disposed within the tube and having a bore passing through the piston. The hydraulic cylinder may also have a valve element disposed within the bore and having a length shorter than a length of the bore. The valve element may be mechanically movable to allow fluid flow through the bore, and hydraulically movable to inhibit fluid flow through the bore.
    Type: Application
    Filed: February 13, 2009
    Publication date: August 19, 2010
    Inventor: Rabie E. Khalil
  • Publication number: 20100196178
    Abstract: The invention relates to a metering pump for feeding out viscous materials, which pump comprises a housing having an inlet, connectable to a viscous material source, and an outlet; a valve body of cylindrical basic shape, which is rotatable into at least two positions by means of a drive unit, a first position allowing a flow of the said material from the inlet to the housing and a second position allowing a flow of the said material from the housing to the outlet. The pump also comprises a cylinder device connected to the housing, having a controllable piston intended to achieve the said flow of material, and at least one device for cleaning the metering pump. The said cleaning device comprises at least one nozzle for cleaning agent, disposed in a valve-body-facing part of the piston. The invention also relates to a method for cleaning such a metering pump.
    Type: Application
    Filed: September 9, 2007
    Publication date: August 5, 2010
    Applicant: Norden Machinery AB
    Inventor: Jan Sjogren
  • Patent number: 7766631
    Abstract: To provide an efficient piston pump having a small number of parts and simple assembly steps, and consuming less current in achieving a relatively low ultimate pressure. The piston pump comprises: a suction port (28) through which gas sucked by varying the volume of a pump chamber (22) defined by a cylinder (12) and a piston (14) fitted in the cylinder (12) passes as the piston (14) is reciprocated, an exhaust port (20) through which the gas discharged by varying the volume of the pump chamber (22) passes, a suction valve (26) installed in the suction port (28) disposed on a piston top, and an exhaust valve (18) installed in the exhaust port (20) disposed on a top of the cylinder (12).
    Type: Grant
    Filed: April 8, 2003
    Date of Patent: August 3, 2010
    Assignee: KMC Litd.
    Inventors: Michio Kitahara, Paul Patterson