Seal For Relatively Movable Valving Parts Patents (Class 137/248)
  • Patent number: 8578963
    Abstract: In a nonreturn valve having a tubular body, which can be installed in a vertical section of an exhaust line, a valve seat, formed within the tubular body, for at least one float, and at least one circumferential groove, which is open in the downstream direction, the intention is to make available a solution by means of which it is possible to provide a nonreturn valve that is simple, advantageous in terms of production engineering and has a particularly high performance, and to do so in a way which is simple in terms of design and is economical. This is achieved by virtue of the fact that the circumferential rim of the at least one float projects radially over the radially inner circumferential wall section and has an axial lip facing upstream, which extends into the circumferential groove in the axial direction when the at least one float is resting on the valve seat.
    Type: Grant
    Filed: November 30, 2011
    Date of Patent: November 12, 2013
    Assignee: Centrotherm Systemtechnik Gmbh
    Inventor: Hans-J├╝rgen Richter
  • Patent number: 6629621
    Abstract: A gauge hatch is provided that has a cover structure that incorporates a pallet/diaphragm combination and that is cooperatively associated with a pressure responsive liquid seal subassembly. The gauge hatch also incorporates a vent neck and a radially adjacent wall that defines with the vent neck a circumferentially extending reservoir. An exterior preferably radially extending arm permits the cover structure to be opened and inclined at an angle relative to the vent neck. Optionally, the cover may be kept in a closed position. The diaphragm normally seats upon the vent neck. A sealing liquid in the reservoir has a closed chamber over the reservoir liquid. When the arm is not held in a cover closed position, and up until a set vent neck pressure is reached, the liquid seal subassembly eliminates low level fugitive vapor emissions escaping from the diaphragm/seat region.
    Type: Grant
    Filed: June 12, 2001
    Date of Patent: October 7, 2003
    Assignee: The Protectoseal Company
    Inventors: Thomas C. Piotrowski, Martin Clift, Baohai Liu
  • Patent number: 6375437
    Abstract: A portable power operated air compressor assembly comprises a portable frame structure and a power operated air compressor unit. The power operated air compressor unit is carried by the frame structure. The frame structure has structure constructed and arranged to provide a source of air under pressure when power operated. A containing structure is carried by the frame structure and is constructed and arranged to receive and contain the source of air under pressure provided by the power operated air compressor unit for use when desired. The portable frame structure includes a base portion providing ground engaging surfaces configured and positioned to engage and support the base portion in generally horizontally extending relation on a horizontal surface. An upright portion has a juncture with the base portion and extends upwardly therefrom when the base portion is supported as aforesaid.
    Type: Grant
    Filed: June 14, 2000
    Date of Patent: April 23, 2002
    Assignee: Stanley Fastening Systems, LP
    Inventor: Patrick B. Nolan
  • Patent number: 6250331
    Abstract: The present invention is directed to a zero crack-pressure, high-flow valve assembly especially suited for use with blood salvage or recovery systems. The valve assembly cooperates with a valve seat defining an opening for selectively providing fluid communication between two adjacent chambers based on a pressure differential between the chambers. The valve assembly includes a disk coupled to a concentric ring support by a plurality of flexible or elastic arms, thereby permitting the disk to move relative to the ring support in a direction that is generally perpendicular to the plane of the ring support and the disk. The connecting arms also define fluid flow passages between the disk and ring support. The valve assembly is mounted so that the disk is normally spaced-apart from the valve seat, allowing fluid to flow between the two chambers. By increasing the relative pressure of the downstream chamber, the disk closes against the valve seat, blocking the opening.
    Type: Grant
    Filed: February 22, 1999
    Date of Patent: June 26, 2001
    Assignee: Haemonetics, Corp.
    Inventor: Steven M. Nardi
  • Patent number: 6056005
    Abstract: A vent valve is provided wherein a pallet/diaphragm type valve is cooperatively and coactively associated with a pressure responsive liquid seal. The assembly eliminates low level fugitive vapor emissions escaping from the diaphragm/seat region up to a predeterminable liquid seal set pressure which preferably is less than or equal to the set pressure for diaphragm opening. A liquid reservoir with a sealed chamber is provided for the liquid seal subassembly. Fugitive emissions from a tank or the like that is associated with the vent valve enter the sealed chamber and are there contained until the pressure therein is sufficient to displace the sealing liquid to an extent sufficient to open the sealed chamber. The valve assembly can be used as a pressure vent, as a vacuum vent, and as a combination pressure and vacuum vent. Optional features, such as a constant liquid level controller, a sight glass, a signaling device, or the like can be provided.
    Type: Grant
    Filed: November 13, 1997
    Date of Patent: May 2, 2000
    Assignee: The Protectoseal Company
    Inventors: Thomas C. Piotrowski, Martin Clift, Baohai Liu
  • Patent number: 5171025
    Abstract: A sealing arrangement for valve has at least one sealing ring, which has a substantially U-like cross section of its housing ring, which is made up of a plurality of parts which are permanently connected together. In the ring space of the housing ring a single, integral sealing element is mounted so as to be able to yield radially and with the housing ring it constitutes a component which may be uniformly handled. A sealing part thereof extends out of the housing opening of the ring space. A sealing ring of this type may be locked in valve housings in order to provide a sealing action between the valve housing and the moving valve piston. The design of the sealing rings makes them suitable for robotized assembly.
    Type: Grant
    Filed: August 27, 1991
    Date of Patent: December 15, 1992
    Assignee: Festo KG
    Inventors: Kurt Stoll, Manfred Rudle
  • Patent number: 5146896
    Abstract: A fuel pressure regulator is disposed in a socket in a fuel rail and retained therein by means of a one-piece metal retention clip which has a flat forked blade portion that is inserted through a slot in the socket sidewall to span the socket in overlying relation to a flange extending around the outside of the cylindrical body of the pressure regulator so as to capture the pressure regulator in the socket and which also has a resilient body-clasping portion in the form of a pair of opposing spring fingers that are cantilevered on and spaced axially of the flat forked blade portion by means of a joining portion of the clip and that come to resiliently embrace the body of the pressure regulator as the forked blade portion comes to span the socket.
    Type: Grant
    Filed: July 25, 1991
    Date of Patent: September 15, 1992
    Assignee: Siemens Automotive L.P.
    Inventors: William J. Imoehl, Michael J. Hornby
  • Patent number: 4750705
    Abstract: A quick action valve for use with fluid or vacuum lines has a permanent magnet assembly for urging the valve member onto the valve seat. The valve is normally opened and is so designed that after closing it may not reopen of its own accord whatever the later changes in direction of flow or whatever the variations in pressure. The closing force is exerted by magnets. Once it has shut, the valve may only be reopened by external mechanical or magnetic action.
    Type: Grant
    Filed: March 4, 1986
    Date of Patent: June 14, 1988
    Assignee: M.A.N. Technologie GmbH
    Inventor: Gernot Zippe
  • Patent number: 4144902
    Abstract: A gas generator, for example a blast furnace, is isolated from an exhaust gas treatment system by means of an isolation valve characterized by a valve housing which may be permanently installed in the gas delivery conduit. The housing has a laterally offset recess which receives the valve member when in the open position and the valve member may define a liquid receiving vessel in the interest of establishing a liquid barrier between the interior of the conduit and the valve seat when the valve is closed. The valve is preferably hydraulically operated and the actuator is mounted so as to minimize loading on the control shaft bearings.
    Type: Grant
    Filed: November 1, 1976
    Date of Patent: March 20, 1979
    Assignee: S.A. des Anciens Etablissements Paul Wurth
    Inventors: Rene N. Mahr, Pierre H. Mailliet
  • Patent number: 3949907
    Abstract: Storage bin having a material discharge opening and a gate which is selectively openable to discharge material from the bin. A region surrounding the gated opening is selectively filled with a liquid to provide an airtight seal surrounding the closed discharge opening. The liquid is withdrawn from the region surrounding the discharge opening, before the gate is opened for discharge of material from the storage bin.
    Type: Grant
    Filed: December 23, 1974
    Date of Patent: April 13, 1976
    Assignee: Astec Industries, Inc.
    Inventor: Erbie Gail Mize