Diaphragm Patents (Class 251/331)
  • Patent number: 6866056
    Abstract: A fuel tank venting system includes a fuel cap, a vent diaphragm and a vent disc. A valve cavity with a substantially concave bottom is formed in a bottom of the fuel cap. The vent disc preferably includes a disc flange and a diaphragm projection. At least one air passage is formed through the vent disc. A substantially convex surface is formed on a top of the diaphragm projection. The vent diaphragm is retained between the substantially concave bottom and the substantially convex surface. When air is needed for fuel flow, a vacuum within the fuel tank pulls the perimeter of the vent diaphragm downward, which breaks a seal with the substantially concave bottom. Air flows around the unsealed perimeter of the vent diaphragm through the at least one air passage. In a second embodiment, the fuel tank venting system is contained in a wall of the fuel tank.
    Type: Grant
    Filed: May 14, 2004
    Date of Patent: March 15, 2005
    Inventor: William A. Scott
  • Patent number: 6862916
    Abstract: The present invention is a sample valve for use in conjunction with a gas chromatograph. The sample valve design provides for both the inertness and low permeability performance of a diaphragm, and an elastomeric material to apply adequate sealing pressure to the diaphragm to seal with the mating surface of a center plate of the sample valve. This valve design allows the active sealing surface to be well polished without the previous concern for maintaining critical flatness of the mating surfaces of the machined parts.
    Type: Grant
    Filed: May 22, 2003
    Date of Patent: March 8, 2005
    Assignee: Siemens Energy & Automation, Inc.
    Inventor: Leroy David Cordill
  • Patent number: 6854713
    Abstract: The diaphragm valve uses a metal dish-type diaphragm set to control the inflow and outflow of fluid. The metal dish-type diaphragm set is above an air flow channel to control the stem above the metal dish-type diaphragm set, and the air will be blocked by pressing the metal dish-type diaphragm to make it fit the metal valve base in the air flow channel; this non-metal valve base is fixed in the air flow channel by a fixed shrunk ring with a taper cross section, and the in-between metal diaphragm in the metal dish-type diaphragm set is annular in the center to reduce the metallic friction between metal diaphragms, to increase application times and to lower the leakage rate of the diaphragm valve.
    Type: Grant
    Filed: March 24, 2003
    Date of Patent: February 15, 2005
    Assignee: Industrial Technology Research Institute
    Inventors: Chun-Hung Lin, Chen-Der Tsai, Chin-Ching Wu, Jung-Chen Ho, Hann-Tsong Wang
  • Patent number: 6837484
    Abstract: Anti-pumping dispense valves, constructed according to principles of this invention, comprise a fluid transport housing having a fluid inlet passage extending into the housing, a fluid outlet passage extending out of the housing, and a fluid transport chamber disposed within the housing. The fluid transport chamber includes an valve seat. An actuator housing is attached to the fluid transport housing and includes an actuator chamber that is in contact with the fluid transport chambers. A diaphragm/poppet assembly is disposed within the fluid transport chamber and comprises a poppet positioned downstream of the seat for placement against the seat to stop fluid flow through the first fluid transport chamber. An actuator is disposed within the actuator chamber for moving the diaphragm/poppet assembly.
    Type: Grant
    Filed: July 10, 2002
    Date of Patent: January 4, 2005
    Assignee: Saint-Gobain Performance Plastics, Inc.
    Inventors: Kenji A. Kingsford, Mario Fregoso, Raymond T. Savard
  • Publication number: 20040262562
    Abstract: A shut-off type diaphragm valve adapted for use in an atomic layer deposition system includes a valve seat having an annular seating surface that surrounds an inlet of the valve and extends radially therefrom. The seating surface contacts a substantial portion of the first side of a flexible diaphragm when the diaphragm is closed, to facilitate heat transfer and counteract dissipative cooling of the diaphragm, thereby inhibiting condensation of a medium flowing through the valve passage. The seating surface is preferably flat and smooth, to prevent shearing of an elastomeric diaphragm. For a plastic diaphragm, a ring-shaped seating ridge may extend from the seating surface to cause localized permanent deformation of the diaphragm and enhanced sealing, while still allowing a substantial portion of the diaphragm to contact the seating surface for enhanced heat transfer. Valve speed enhancements and other reliability enhancing features are also described.
    Type: Application
    Filed: June 26, 2003
    Publication date: December 30, 2004
    Inventors: Jarmo Ilmari Maula, Hannu Leskinen, Teemu Lang, Pekka Kuosmanen, Kari Harkonen, Bradley J. Aitchison
  • Publication number: 20040262563
    Abstract: A compressor for operating a diaphragm of polymer material for a diaphragm valve includes a base body having a diaphragm-proximal surface, and a material layer at least partially provided on the diaphragm-proximal surface and having a very low coefficient of friction.
    Type: Application
    Filed: May 10, 2004
    Publication date: December 30, 2004
    Applicant: GEMU Gebruder Muller Apparatebau GmbH & Co. KG
    Inventor: Fritz Muller
  • Publication number: 20040265150
    Abstract: The present invention provides a membrane with magnetic particles. In one embodiment the membrane is created by mixing particles in a non-magnetic base. The membrane may act as an actuator, a sensor, a pump, a valve, or other device. A magnet is operatively connected to the membrane. The magnet acts on and changes the shape of the membrane.
    Type: Application
    Filed: May 28, 2004
    Publication date: December 30, 2004
    Applicant: The Regents of the University of California
    Inventors: Michael W. McElfresh, Matthew S. Lucas
  • Patent number: 6830229
    Abstract: A two-stage valve for controlling the flow of fluid from a pressurized fluid supply with an upper main body including a cavity with a contoured inner surface; a lower main body with at least one flow exhaust passage forming a primary flow path through the two-stage valve; a pre-stressed diaphragm sandwiched between the upper and lower main bodies, and pressure control capability for controlling the pressure in the cavity. A first valve opens and closes the flow of gas from the pressurized gas supply to the cavity. A second valve allows the pressure in the cavity to exhaust to the environment. Raising and lowering of the pressure in the cavity causes the pre-stressed diaphragm to open and close the flow of gas from the pressurized gas supply through the primary flow path of the two-stage valve. The design is suitable as a microvalve using Micro-Electro-Mechanical Systems (MEMS) concepts.
    Type: Grant
    Filed: February 28, 2003
    Date of Patent: December 14, 2004
    Assignee: Lockheed Martin Corporation
    Inventors: Todd Garrett Wetzel, Mathew Christian Nielsen, Stanton Earl Weaver, Jr., Renato Guida, James Wilson Rose, Laura Jean Meyer
  • Publication number: 20040218020
    Abstract: Image forming devices and valves that may be used in image forming devices.
    Type: Application
    Filed: April 29, 2003
    Publication date: November 4, 2004
    Inventors: Alan Shibata, David Whalen
  • Patent number: 6811142
    Abstract: A valve device (200) for a closed system for endotracheal aspiration of a patient via a catheter. The device (200) comprises a valve chamber (220, 222) that can be connected to a vacuum source and to the catheter, a valve body (250) arranged in the valve chamber (220, 222), a manually operated actuator button (210) for the valve body (215), a coupling (260) engaging the valve body (250) and to the actuator button (210) for transmitting a movement of the actuator button (210) to the valve button (250), a spring device for holding the valve body (250) in the first position. The device is characterised in that the wall (216) that delimits the valve chamber (220, 222) comprises an opening (219) for receiving the valve body (250), that a resilient membrane (253) forms a sealing of the opening (219) within the valve housing (215), that the resilient membrane is connected to the valve body and the valve housing (215), respectively, and that the coupling (260) extends exteriorly relative to the valve housing (215).
    Type: Grant
    Filed: October 4, 2002
    Date of Patent: November 2, 2004
    Assignee: Unomedical A/S
    Inventor: Gunnar N. Svendsen
  • Publication number: 20040200990
    Abstract: Valves, particularly useful for controlling flow of heat transfer fluids in various heating, air conditioning and ventilation systems, are provided. The valves are of the curtain valve type and operate at very low torque and provide easy assembly and repair. The valve or actuator has an adjustment for the flow coefficient. A disclosed valve comprises a valve body having an inside surface, an inlet port comprised of an opening through the inside surface and enabling fluid flow into the valve body, an outlet port comprised of an opening through the inside surface and enabling fluid flow from the valve body, and a curtain valve closure. The closure adjustably controls fluid flow through the outlet port and is of a modular design including a flexible diaphragm held in an insert positioned at least partially within the outlet port. The insert has at least one dimension larger than a mating surface on the internal surface of the valve body.
    Type: Application
    Filed: June 28, 2002
    Publication date: October 14, 2004
    Inventor: Bengt A. Carlson
  • Publication number: 20040195539
    Abstract: A normally open fluid manipulation valve assembly and system and a method for closing, re-opening and re-closing same. The normally open valve assembly can include a substrate including a first surface, with first and second recesses formed in the first surface. A recessed channel can be formed in the first surface. The recessed channel can extend from the first recess to the second recess and can be at least partially defined by a first deformable material having a first modulus of elasticity. The valve assembly can also include an elastically deformable cover. The elastically deformable cover can include a layer of an elastically deformable material having a modulus of elasticity that is greater than the modulus of elasticity of the first deformable material, and an adhesive layer that contacts the first surface of the substrate.
    Type: Application
    Filed: July 23, 2003
    Publication date: October 7, 2004
    Inventors: Dennis E. Mead, Zbigniew T. Bryning
  • Publication number: 20040195533
    Abstract: The invention relates to a membrane valve, for transfer of biological and pharmaceutical products in particular, which an be opened pneumatically. By introducing air through an inlet opening (19) said air therein through a hollow spindle (4, 13, 23) reaches the space below a piston (12), lifts the latter and thus opens said valve. By providing for a hollow spindle (4, 13, 23) the supply of air can be effected in the drive portion. Interfering conducts and devices outside of said valve can thus be avoided, this permitting a more compact, room-saving construction of said valve as well as a simplified maintenance and cleaning of said valve.
    Type: Application
    Filed: February 12, 2004
    Publication date: October 7, 2004
    Inventors: Valentin Mall, Martin Hiller
  • Patent number: 6789569
    Abstract: The pressure relief valve has a spring pressure-loaded diaphragm closing body (13), which in the closed position sealingly engages on a centrally positioned valve seating surface (10) surrounding a first valve opening (8). Its spring pressure loading takes place by means of a counterpressure body (13) positioned centrally over it. The valve seating surface (10) is surrounded by a channel-like valve chamber (11) in the valve housing body (2) and on which is provided on the overpressure side at least one second valve opening (9). To be able to dissipate high overpressures, the counterpressure body (30) is surrounded by a diaphragm support ring (17) held on the valve housing (6) and which has a circumferential recess (19), whose depth measured perpendicular to the diaphragm closing body (13) determines the maximum deflection of said body (13), so that when the valve is completely opened the diaphragm closing body (13) is supported in an area between the valve seating surface (10) and its outer edge.
    Type: Grant
    Filed: July 18, 2002
    Date of Patent: September 14, 2004
    Assignees: Obrist Engineering GmbH, Luk Fahrzeug-Hydraulik GmbH & Co. KG
    Inventors: Peter Kuhn, Frank Obrist, Stefan Kroess, Georg Weber
  • Patent number: 6789781
    Abstract: A reinforced plastic valve apparatus in a preferred embodiment comprises an upper valve portion, a lower valve portion, an endoskeletal structure configured as a weir support or reinforcing member and an exoskeletal framework configured as a support collar. The upper valve portion preferably includes an upper plastic valve housing or body, a resilient diaphragm and a valve actuator. The lower valve portion comprises a lower plastic valve housing or body that is preferably configured to mate with the upper valve housing to define a valve interior. The lower valve body preferably has an integral weir which, in conjunction with the resilient diaphragm, defines a fluid passage. The diaphragm is configured to sealingly engage and disengage with the weir as effected by the valve actuator. The weir support member is disposable within the lower housing to support the weir.
    Type: Grant
    Filed: March 18, 2002
    Date of Patent: September 14, 2004
    Assignee: Entegris, Inc.
    Inventors: Michael W. Johnson, Jeffrey J. McKenzie
  • Patent number: 6786471
    Abstract: A diaphragm valve assembly comprising a body defining a valve chamber and first and second passageways through said, a removable, annular valve seat installed in the valve chamber around of said passageways, seat holding means comprising a seat holder shaped to surround said valve seat, a flexibly resilient diaphragm having a valve closing portion and means for holding the diaphragm in position in the valve chamber. The resilience of the diaphragm urges said valve closing portion away from the valve seat. Selectively operable driving means drive the valve closing portion of the diaphragm into contact with the valve seat for closing the valve. A protruding, cylindrical rim portion around said one passageway, and said seat holder define an annular recess adapted to receive the valve seat such that said valve seat is held between said seat holder and said rim portion.
    Type: Grant
    Filed: June 25, 2002
    Date of Patent: September 7, 2004
    Assignee: Fujikin Incorporated
    Inventors: Tomohiro Nakata, Michio Yamaji
  • Patent number: 6786468
    Abstract: A valve and method of constructing same for a purge control device are provided. The valve includes an integral body. The valve further includes a resilient member inserted into the integral body. The resilient member is electromagnetically responsive so that the member can be selectively actuated between respective open and close conditions. An electromagnetic actuator is affixed to the integral body to generate an electromagnetic field for selectively actuating the resilient member between the open and closed conditions. The mass of the resilient member is sufficiently low so that the level of noise produced by the valve is correspondingly low.
    Type: Grant
    Filed: October 7, 2002
    Date of Patent: September 7, 2004
    Assignee: Delphi Technologies, Inc.
    Inventor: Thaddeus Schroeder
  • Patent number: 6786470
    Abstract: A valve body for a valve includes a body having an internal cavity formed therein. An inlet passage and an outlet passage are formed in the body. The inlet passage has an inlet opening in communication with the internal cavity, and the outlet passage has an outlet opening in communication with the internal cavity. A circumferential sealing surface is formed on a wall of the internal cavity. The circumferential sealing surface extends between the inlet opening and the outlet opening and circumferentially around the internal cavity. Furthermore, a bottom line extending through the inlet passage, the internal cavity and the outlet passage forms a coplanar surface to allow for free-drainage of the body.
    Type: Grant
    Filed: February 20, 2002
    Date of Patent: September 7, 2004
    Inventor: Douglas A. Newberg
  • Patent number: 6783736
    Abstract: A cartridge for analyzing a fluid sample has a body defining at least first and second channels and a cavity separating the channels. An end of the first channel is positioned on a first side of the cavity, and an end of the second channel is positioned on a second side of the cavity. The cavity is defined by a first curved surface positioned adjacent the end of the first channel, a second curved surface positioned adjacent the end of the second channel, and at least a third surface between the first and second curved surfaces. The cartridge also comprises an elastic membrane for establishing a seal with the first and second curved surfaces to prevent the flow of fluid between the channels. The third surface is recessed from the first and second surfaces to provide a gap between the membrane and the third surface when the membrane is pressed against the first and second surfaces. A cartridge having a conical valve seat is also disclosed.
    Type: Grant
    Filed: March 6, 2001
    Date of Patent: August 31, 2004
    Assignee: Cepheid
    Inventors: Michael T. Taylor, Farzad Pourahmadi, Ronald Chang, Douglas B. Dority
  • Publication number: 20040166031
    Abstract: A cartridge for analyzing a fluid sample has a body defining at least first and second channels and a cavity separating the channels. An end of the first channel is positioned on a first side of the cavity, and an end of the second channel is positioned on a second side of the cavity. The cavity is defined by a first curved surface positioned adjacent the end of the first channel, a second curved surface positioned adjacent the end of the second channel, and at least a third surface between the first and second curved surfaces. The cartridge also comprises an elastic membrane for establishing a seal with the first and second curved surfaces to prevent the flow of fluid between the channels. The third surface is recessed from the first and second surfaces to provide a gap between the membrane and the third surface when the membrane is pressed against the first and second surfaces. A cartridge having a conical valve seat is also disclosed.
    Type: Application
    Filed: March 6, 2001
    Publication date: August 26, 2004
    Applicant: Cepheid
    Inventors: Michael T. Taylor, Farzad Pourahmadi, Ronald Chang, Douglas B. Dority
  • Patent number: 6764060
    Abstract: A flow rate control valve includes a rotary driving source driven by an electric signal, a first movable member screwed axially displaceably in a screw hole by a rotary action of the rotary driving source, a second movable member displaced together with the first movable member, a diaphragm connected to the second movable member, a valve seat on which the diaphragm is seated, and a first fluid port and a second fluid port to which a pressure fluid is supplied or from which the pressure fluid is discharged.
    Type: Grant
    Filed: July 5, 2002
    Date of Patent: July 20, 2004
    Assignee: SMC Kabushiki Kaisha
    Inventors: Yoshihiro Fukano, Kousaku Inamoto
  • Patent number: 6755354
    Abstract: A suck back valve has a volume-varying mechanism including a cylindrical flexible member which has a flow chamber formed therein for communicating with a fluid passage having a first port and a fluid passage having a second port, a fixing member which fixes a part of the outer circumferential surface of the cylindrical flexible member to a joint section, and a hook member which increases the volume of the flow chamber by expanding and deforming the outer circumferential surface of the cylindrical flexible member.
    Type: Grant
    Filed: February 26, 2003
    Date of Patent: June 29, 2004
    Assignee: SMC Kabushiki Kaisha
    Inventors: Yoshihiro Fukano, Tadashi Uchino
  • Patent number: 6752376
    Abstract: A flow controller (1), comprising a valve body (4) having flow paths forming an inlet and an outlet of fluid, a diaphragm (6) held fixedly between the valve body and a bonnet (5), and an operating mechanism (7) moving the diaphragm vertically, wherein the valve body flow paths communicate with each other through a projection-free communication path (8), the a diaphragm is formed so that, when lowering, it comes into close contact with the communication path so that it closes the flow path and, when rising, the center part thereof is recessed so that an area near the outer peripheral part is raised, and a curved surface (52), to which the outer upper surface (63) of the raised part is closely fitted, is formed on a bonnet on the inner lower surface of a diaphragm holding part (51).
    Type: Grant
    Filed: November 12, 2002
    Date of Patent: June 22, 2004
    Assignee: Kabushiki Kaisha Fujikin
    Inventors: Jyunji Satou, Hisatoshi Akamoto, Makoto Iwata
  • Patent number: 6752371
    Abstract: A solenoid plunger (36) is disposed for reciprocation in a plunger pocket that is formed by the stationary parts of a solenoid-type actuator (10). A flexible diaphragm (22) closes the plunger pocket's open mouth and is deformed by movement of a plunger (36) between an open position, in which it is displaced from a valve seat (20), and a closed position, in which it is seated on the valve seat and thereby prevents flow from a valve inlet (16) to a valve outlet (18). The diaphragm thereby isolates the plunger from the fluid thereby being controlled, but a separate, incompressible fluid fills the chamber in which the plunger reciprocates. A through-plunger passage (44, 56) provides a low-flow-resistance path for the incompressible fluid to flow into and out of the portion (52) of the plunger chamber behind the plunger as the plunger moves. This reduces actuation time and thus the energy required for an actuation.
    Type: Grant
    Filed: June 19, 2002
    Date of Patent: June 22, 2004
    Assignee: Arichell Technologies, Inc.
    Inventors: Kay Herbert, Fatih Guler, Natan E. Parsons
  • Patent number: 6752375
    Abstract: A solenoid-operated valve includes a bonnet, a cap member which is disposed in the bonnet, a fixed iron core which is connected to a central portion of the cap member, a movable iron core which is provided under the fixed iron core, which is displaceable under the exciting action of a coil, and which has an inclined surface having gradually contracted diameters, an annular sleeve which is disposed to surround an outer circumferential surface of the movable iron core, and a spring member which is interposed between an annular projection of the movable iron core and an annular groove of the sleeve.
    Type: Grant
    Filed: August 9, 2002
    Date of Patent: June 22, 2004
    Assignee: SMC Kabushiki Kaisha
    Inventor: Yoshihiro Fukano
  • Publication number: 20040108485
    Abstract: The diaphragm valve uses a metal dish-type diaphragm set to control the inflow and outflow of fluid. The metal dish-type diaphragm set is above an air flow channel to control the stem above the metal dish-type diaphragm set, and the air will be blocked by pressing the metal dish-type diaphragm to make it fit the metal valve base in the air flow channel; this non-metal valve base is fixed in the air flow channel by a fixed shrunk ring with a taper cross section, and the in-between metal diaphragm in the metal dish-type diaphragm set is annular in the center to reduce the metallic friction between metal diaphragms, to increase application times and to lower the leakage rate of the diaphragm valve.
    Type: Application
    Filed: March 24, 2003
    Publication date: June 10, 2004
    Inventors: Chun-Hung Lin, Chen-Der Tsai, Chin-Ching Wu, Jung-Chen Ho, Hann-Tsong Wang
  • Publication number: 20040094740
    Abstract: A metal diaphragm valve used for a semiconductor manufacturing device allowing a large amount of flow to pass therein in spite of a compact size by reducing a fluid resistance of a flow passage ranging from a valve chamber to an outflow passage through an inflow passage in a valve body, comprising the body (2) having the inflow passage (6), the valve chamber (8), and the outflow passage (7), a metal diaphragm (3), a drive means (4), and an annular groove (5), characterized in that the diameter (D) of the outflow passage (6) is made larger than the groove width (W) of the annular groove (5), and the effective sectional area of the crossing portion of the annular groove (5) with the outflow passage (6) is made larger than the cross-sectional area of the outflow passage (6).
    Type: Application
    Filed: November 22, 2002
    Publication date: May 20, 2004
    Inventor: Shigeru Itoi
  • Patent number: 6736370
    Abstract: The disclosure pertains to a compact integrated fluid control valve useful in controlling process fluids handled as part of a semiconductor processing operation. In the wetted section of the valve, process fluids enter through one or more entrance ports and exit through an annular metallic valve seat. In the valve's drive section, a sliding cylinder, including an upper horizontal member tied to a lower horizontal member, moves up and down. The lower horizontal member presses a diaphragm against the valve seat to close the valve, and moves away from the valve seat to permit fluid flow through the valve. A spring presses at the top of the upper horizontal member of the sliding cylinder, while a controlled pneumatic pressure is applied at the bottom of the upper horizontal member. The balance between the force of the spring and the force of the pneumatic pressure determines the extent to which the valve is open.
    Type: Grant
    Filed: December 20, 2002
    Date of Patent: May 18, 2004
    Assignee: Applied Materials, Inc.
    Inventors: Mark Crockett, Michael DeChellis
  • Publication number: 20040075073
    Abstract: A microvalve and a method of forming a diaphragm stop for a microvalve. The microvalve includes a first layer and a diaphragm member to control the flow of fluid through the microvalve. The method comprises the step of forming a contoured shaped recess extending inward from a surface of the layer by using a laser to remove material in a series of areas, at successively greater depths extending inward from said surface. Preferably, the recess has a dome shape, and may be formed by a direct-write laser operated via a computer aided drawing program running on a computer. For example, CAD artwork files, comprising a set of concentric polygons approximating circles, may be generated to create the dome structure. The laser ablation depth can be controlled by modifying the offset step distance of the polygons and equating certain line widths to an equivalent laser tool definition.
    Type: Application
    Filed: October 21, 2002
    Publication date: April 22, 2004
    Applicant: Lockheed Martin Corporation
    Inventors: Glenn S. Claydon, Ernest W. Balch
  • Patent number: 6719268
    Abstract: A solenoid-operated valve comprises first and second elastic ring members each of which is made of an elastic material such as rubber, which retain a peripheral edge of a diaphragm, and which are flexibly bent in accordance with displacement of the diaphragm. A pair of lip sections is formed on the first and second elastic ring members.
    Type: Grant
    Filed: December 24, 2001
    Date of Patent: April 13, 2004
    Assignee: SMC Kabushiki Kaisha
    Inventors: Yoshihiro Fukano, Tadashi Uchino
  • Patent number: 6715733
    Abstract: Micro-valves that include a diaphragm capable of being positioned on a valve seat or removed from the valve seat. The micro-valves also include supports and a cover that restrict the motion of the diaphragm, thereby reducing the possibility of cracking. Micro-valves made by anodically bonding the diaphragm to a seat substrate and anodically bonding the cover to the diaphragm. Micro-injectors that include micro-valves. Also, methods of making the micro-valves and micro-injectors.
    Type: Grant
    Filed: August 8, 2001
    Date of Patent: April 6, 2004
    Assignee: Agilent Technologies, Inc.
    Inventors: Tak Kui Wang, Peisheng Sheng, Richard P. White
  • Publication number: 20040041119
    Abstract: Known pressure-regulating valves, in particular, from the crank housing exhaust, have a regulating membrane made from an elastomer or a plastic. Elastomers, however, have a high permeability for hydrocarbons, an unsatisfactory chemical durability relative to oil, fuel and fuel additives and poor elasticity with low temperatures. Thermoplasts do not have these disadvantages and are better suited as materials for a regulating membrane. According to the present invention, it is proposed to use a membrane made from metal, preferably stainless steel. The membrane has a corrugated or graduated form. The pressure-regulating valve of the present invention has good characteristics with reference to permeability for hydrocarbons, chemical durability and temperature dependence of the elasticity and is substantially simplified through functional integration. The membrane assumes additionally the functions of a restoring spring and a housing cover.
    Type: Application
    Filed: May 13, 2003
    Publication date: March 4, 2004
    Inventors: Markus Christen, Dietmar Uhlenbrock
  • Publication number: 20040036047
    Abstract: A microvalve with a normally closed state includes a membrane (80), an actuation means (100) for controllable deformation of the membrane (80) as well as a valve shutter (180) deformable by the controllable deformation of the membrane (80). The valve shutter (180) at least partially opposes the membrane (80) and rests, in a first position in the normally closed state of the valve, along a sealing lip (130) arranged between the valve shutter (180) and the membrane. The sealing lip (130) is arranged such that an outlet of the valve, which outlet is in fluid communication with an interrupted section of the sealing lip (130), is sealed against an input channel (170) bordering on the valve shutter (180). In addition, the valve shutter is moldable into a second position so as to bring the outlet (140) into fluidic communication with the input channel (170) in an open state of the valve.
    Type: Application
    Filed: September 23, 2003
    Publication date: February 26, 2004
    Inventor: Martin Richter
  • Patent number: 6688577
    Abstract: A self-draining, valve for fluid flow control. Upon removal of fluid supply pressure from the valve, the valve automatically reverts to a partially open state allowing fluid in the valve to drain. The disclosed valve is particularly useful in applications where draining of fluids with bio-matter or other contaminants is desired after removal of supply pressure in order to reduce contamination buildup and/or permit thorough cleaning.
    Type: Grant
    Filed: January 30, 2002
    Date of Patent: February 10, 2004
    Inventor: W. T. David Abbott
  • Patent number: 6685164
    Abstract: The control valve according to the present invention has a high durability, so that the valve is not easily damaged even in case that the valve is provided in a corrosion gas current path. The valve has a construction such that a diaphragm (4) is contained in the valve body (2), which has a valve chamber (23) between the gas current in path (25) and the gas current out path (26). The diaphragm 4 is urged against an opening (252) formed in the center of the valve seat 231 in the valve chamber (23) to open and close the opening. The valve has a valve control member (5), which has a clamping member (3) to clamp the diaphragm and is made to contact to the diaphragm from outside to open and close the opening. The diaphragm has an urging member (41) made of ceramic, which is fixed to the opening (252) side of the diaphragm so that the resistance to corrosion of the diaphragm is improved.
    Type: Grant
    Filed: September 11, 2000
    Date of Patent: February 3, 2004
    Assignee: Hamai Industries Limited
    Inventors: Masao Koizumi, Koichi Ohashi
  • Patent number: 6685165
    Abstract: A valve assembly having a cap defining a first and second fluid flow passage for allowing the flow of fluid is attached to a seat member which is coupled to an actuator. A plunger having an adjustably attached diaphragm is maintained within the seat member and the actuator, and the plunger positions the diaphragm over the first and second fluid flow passage. The actuator controls the plunger and determines the retraction of the plunger to allow fluid flow and the insertion of the plunger to prevent fluid flow.
    Type: Grant
    Filed: September 25, 2000
    Date of Patent: February 3, 2004
    Assignee: Kloehn Company, Ltd.
    Inventors: Michael Kloehn, Walter J. Kish, Jr.
  • Patent number: 6676107
    Abstract: A control element for media, for instance, a pneumatic valve or a hydraulic valve, comprising a valve body in which one or several channels are arranged, at least one moving element arranged in a channel and means for carrying out a relative movement of and/or deforming the moving element. The means are directly arranged on and/or directly act upon the moving element.
    Type: Grant
    Filed: October 4, 2002
    Date of Patent: January 13, 2004
    Inventor: Walter Sticht
  • Patent number: 6672566
    Abstract: A multi-use sterile access/GMP diaphragm valve housing having a valve housing block having a main flow axis. The housing having a main flow valve mounting surface formed parallel to the main flow axis. The housing having a first port and an opposing second port. The housing having a first passage extending from the first port to the main flow valve mounting surface. The housing having a second passage extending from the main flow valve mounting surface to the second port. The housing having a main flow weir between the first and second passages. The housing having first and second planar lands formed upon the valve housing block adjacent the first passage for forming a third passage through a respective one of the lands in fluid communication with the first passage. The first and second planar lands are disposed orthogonal to each other and parallel to the main flow axis.
    Type: Grant
    Filed: November 13, 2001
    Date of Patent: January 6, 2004
    Assignee: ITT Manufacturing Enterprises, Inc.
    Inventor: Ricardo Martin Cordova
  • Patent number: 6672561
    Abstract: A radial diaphragm valve includes a diaphragm having an elongated stem that is threadably or otherwise installed on an actuator piston. The elongated stem is slideably received in a bore formed in the actuator housing, and includes a circumferential recess that receives a seal. The seal provides a backup seal function separating the process fluid from the interior region of the actuator.
    Type: Grant
    Filed: August 21, 2002
    Date of Patent: January 6, 2004
    Assignee: Swagelok Company
    Inventors: David Kerg, Michael R. Whaley
  • Publication number: 20040000659
    Abstract: A seal arrangement for a vacuum valve with a valve body (1) in which is arranged a valve opening (2) having a longitudinal axis (5) and which has an inner jacket surface (6) surrounding the valve opening and forming a valve seat, and with a valve plate (3) which closes the valve opening in the closed state of the vacuum valve and which has an outer jacket surface (9) surrounding the valve plate, said inner jacket surface and said outer jacket surface being located opposite one another in the closed state of the valve, wherein the seal arrangement comprises:
    Type: Application
    Filed: June 26, 2002
    Publication date: January 1, 2004
    Inventor: Friedrich Geiser
  • Publication number: 20030226994
    Abstract: A liquid-dispensing faucet includes a mounting fitting that defines a first flow passage and that is adapted for connection to an associated container with the first flow passage in communication with an internal space of the container. The mounting fitting comprises a valve seat. A body is connected to the mounting fitting. The body defines an inlet, an outlet and a second flow passage that fluidically interconnects the inlet and the outlet. A seal member is connected to the body and is selectively movable between a first operative position and second operative position. The seal member sealingly mates with the valve seat to block the first flow passage when the seal member is in the first operative position. An actuator is operably coupled to the seal member for moving the seal member from the first operative position to the second operative position. In this manner, the valve seat is provided in the mounting fitting rather than as a part of the faucet body.
    Type: Application
    Filed: February 27, 2003
    Publication date: December 11, 2003
    Inventor: Raymond P. Kawolics
  • Patent number: 6648006
    Abstract: Valve (1) with a through-going axial bore (4), a first spindle (5) axially displaceable in the bore (4), an elastic/flexible seal (10) placed at the one end surface (6) of the first spindle (5), at least two hollow connection branches (7, 8), each of which connects the valve to an outer coupling, said first spindle (5) in a first position forming a first annular sealing surface (9) between the outer surface of the seal (10) and the inner bottom (11) of the valve body which contains the outlet opening (29), and where the first spindle (5) lies coaxially inside a second axially displaceable and hollow spindle (12) lying in the bore (4), the end surface of which or parts thereof (13) form a second annular sealing surface (14) between the outer surface of the seal (10) and the inner bottom (11) of the valve body at a second position radially from the first annular sealing surface (9).
    Type: Grant
    Filed: October 1, 2001
    Date of Patent: November 18, 2003
    Assignee: Ostergaard Maskinfabrik A/S
    Inventor: Jan Ostergaard
  • Publication number: 20030210607
    Abstract: An on-chip chemical compound dilution system for providing dilution of a chemical compound in a microfluidic application includes at least one sample well for providing a selected chemical compound to be diluted, a dilution well for providing a diluent for diluting the chemical compound, a network of channels for carrying the chemical compound and diluent, a first syringe pump for effecting dilution, a second syringe pump, a detector and a plurality of valves for selectively controlling the flow of liquid through the channels. The dilution system may be a multiple-stage dilution system for precisely mixing a plurality of chemical compounds in a diluent. The dilution system allows for accurate calibration to compensate for variations due to manufacturing, thereby providing precise dilution ratios. The dilution system further enables flushing to allow re-use of the system with another chemical compound.
    Type: Application
    Filed: June 25, 2002
    Publication date: November 13, 2003
    Applicant: Coventor, Inc.
    Inventors: John Gilbert, Manish Deshpande
  • Publication number: 20030209684
    Abstract: A valve assembly for a sanitary container that is used to isolate the contents of the sanitary container. The valve assembly has a valve housing that is machined from a solid piece of stainless steel. A flange radially extends from the bottom of the valve housing, thereby enabling the valve housing to be clamped to the flanged access port of a sanitary container. The valve housing forms part of two separate diaphragm valves. The diaphragm valves control flow through the valve housing along two separate and isolated pathways. Additionally, a conduit is formed vertically through the valve housing. The conduit is unobstructed and enables materials to be passed through the housing of the valve mechanism unabated. The design of the valve assembly prevents the valve assembly from harboring contaminants and enables the valve assembly to be sanitized using a traditional autoclave.
    Type: Application
    Filed: May 9, 2002
    Publication date: November 13, 2003
    Inventor: Peter Lin
  • Patent number: 6637723
    Abstract: A valve for controlling fluid flow. The valve include a support element providing a flow path, at least a portion of the flow path extending along an axis of flow through the valve. A flexible element is compressible against the support element to interrupt the flow path and restrict fluid flow through the valve. An actuating element is movable along the axis of flow to engage and deform the flexible element against the support element.
    Type: Grant
    Filed: September 6, 2001
    Date of Patent: October 28, 2003
    Assignee: Entegris, Inc.
    Inventors: James N. L. Pedersen, Steven J. Goldrich, Stephanie J. Moehnke
  • Patent number: 6629820
    Abstract: A method of controlling fluid flow in a channel in a microfluidic flow control device by introducing fluid to the channel, with the fluid flowing in a flow direction and controllably deforming material defining the channel in a direction perpendicular to the flow direction to control fluid flow in the channel. The channel is formed between a first plate and a second plate and controllably deforming material defining the channel comprises deforming at least one of the first and second plates. Material defining the channel extends continuously between an inlet port and an outlet port. Controllably deforming material defining the channel preferably comprises deforming the first plate into contact with a seat formed in the second plate to close the channel. The seat may be formed by a ridge having a smoothly changing profile in section across the channel. The method may be operated to generate a pumping, filtering, trapping or mixing function. Apparatus for carrying out the method is also disclosed.
    Type: Grant
    Filed: June 26, 2001
    Date of Patent: October 7, 2003
    Assignee: Micralyne Inc.
    Inventor: Kevin E. Kornelsen
  • Patent number: 6616120
    Abstract: The “Improved hydraulic diaphragm valve, for fluid flow regulation” which constitutes the object of this Patent, contains a semi-conical deflector (2) with an open and flat upper face (3), its perimeter being an isosceles triangle and its cross section equal to that of the valve passage, the semi-cone (2) and the triangle (3) being oriented towards the intake of the fluid. The diaphragm (4) is seated on the flat section (3) pressed by the fluid contained in the chamber formed by the cover (5) and the diaphragm (4); whilst by draining the fluid from the chamber, the intake pressure lifts the diaphragm (4) off its seating. Shutting or reducing flow is produced in the upstream direction, and opening or increasing flow, downstream.
    Type: Grant
    Filed: September 6, 2002
    Date of Patent: September 9, 2003
    Assignee: Plasticos Mondragon, S.A.
    Inventors: Isaac Barzuza, Ramón García Mondragon
  • Publication number: 20030155546
    Abstract: A sanitary diaphragm valve is provided that includes a generally dome shaped diaphragm having a central boss that can be connected to or driven by a valve actuator. The diaphragm includes an outer peripheral edge and a relatively thin web portion that connects the boss to the outer edge. In one embodiment, the web portion is arcuate or dome shaped. The thinner web portion permits the diaphragm to have an extended cycle life and to permit the valve to operate at higher fluid pressures. The diaphragm may be made from a chemically resistant material and optimized to maintain high flexure.
    Type: Application
    Filed: March 12, 2003
    Publication date: August 21, 2003
    Applicant: SWAGELOK COMPANY
    Inventors: Ronnie Browne, George Carlson
  • Patent number: 6604727
    Abstract: A pressure compensating element (8) for a control valve (3) for controlling an overflow of a medium from a first pressure space (1) into a second pressure space (2) has a diaphragm (9) separating the pressure space (1, 2) from one another. The pressure compensating element (8) compensates forces acting on a valve body (5) of the control valve (3) and generated by pressure differences in the pressure spaces (1, 2). However, an overflow of a medium from one pressure space (1) into the other pressure space (2) takes place solely in the region of the control valve (3).
    Type: Grant
    Filed: August 1, 2000
    Date of Patent: August 12, 2003
    Assignee: Mannesmann VDO AG
    Inventor: Nouhad Bachnak
  • Patent number: 6595484
    Abstract: A wall structure forms a fluid flow channel and includes a deformable multi-wall area for varying a cross-section of the flow channel. The wall structure comprises a homogeneous material. The wall structure is made by sequentially applying layers of a material to one another such that in a region of the wall structure corresponding to the multi-wall area layers do not adhere to one another, to form individual walls disposed adjacent one another in the direction of the thickness of the wall structure.
    Type: Grant
    Filed: February 28, 2001
    Date of Patent: July 22, 2003
    Inventor: Heinz Gross