Patents by Inventor Michael L. Lundstrom

Michael L. Lundstrom has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 7341288
    Abstract: A restrained sleeve coupling assembly for interconnecting pipe sections includes a generally cylindrical sleeve body, a generally cylindrical adaptor body and opposed end rings which are sleeved over the respective pipe sections to be joined. The generally cylindrical sleeve body has opposed gasket engaging surfaces adjacent opposite ends of the sleeve body for receiving fluid sealing gaskets forcibly engaged with the sleeve body, the adaptor body and one of the opposed end rings. The adaptor body includes a gasket engaging surface for receiving a fluid sealing gasket forcibly engaged with the adaptor body and the other of the opposed end rings. The end rings include flanges for engagement with elongated tension bolt assemblies to secure the sleeve body, the adaptor body, the gaskets and the end rings in assembly with each other.
    Type: Grant
    Filed: February 24, 2005
    Date of Patent: March 11, 2008
    Assignee: Ebaa Iron, Inc.
    Inventor: Michael L. Lundstrom
  • Publication number: 20030230897
    Abstract: A restrained sleeve coupling assembly for interconnecting pipe sections includes a generally cylindrical sleeve body with opposed gasket engaging surfaces adjacent opposite ends of the body for receiving fluid sealing gaskets forcibly engaged with the body and opposed end rings which are sleeved over the respective pipe sections to be joined. The end rings include flanges for engagement with elongated tension bolt assemblies to secure the sleeve body, the gaskets and the end rings in assembly with each other. The end rings also include circumferentially spaced bosses and polygonal shaped gripper members disposed in recesses in the bosses and forcibly engageable with the outer surfaces of the pipe sections over which the end rings are sleeved as determined by limited torque bolt assemblies engageable with the gripper members.
    Type: Application
    Filed: June 12, 2002
    Publication date: December 18, 2003
    Applicant: EBAA Iron, Inc.
    Inventor: Michael L. Lundstrom
  • Patent number: 6173993
    Abstract: A joint restraint (10) for securing a first pipe (12) to a second pipe. The joint restraint (10) includes an annular body (14) and a plurality of wedge housings (18) extending from the annular body (14) and characterized by open rear faces (38) to allow coreless casting. A bolt (32) is disposed within a hole (30) in each wedge housing (18) and a wedge (40) is disposed within each wedge housing (18). Each wedge (40) has a bolt-actuated tooth (52), a larger pressure-actuated tooth (54), a top surface (44) having a groove (48) adapted to slidably receive a bolt actuator (32), and a bottom surface (42) that is partially tapered to act as a bearing (76) limiting the extent of bolt-driven actuation.
    Type: Grant
    Filed: June 11, 1999
    Date of Patent: January 16, 2001
    Assignee: EBAA Iron, Inc.
    Inventors: Dennis D. Shumard, Michael L. Lundstrom
  • Patent number: 6065784
    Abstract: A backup ring for a pipe joint restraint includes a continuous one piece ring member or opposed ring segments, both including multiple inside radii to provide a portion of the ring which may be secured to a pipe fitting and a portion of the ring which is adapted to provide clearance for reinforced areas of a pipe fitting, such as a fillet reinforcement at a branch portion of a tee fitting. The ring embodiments with multiple ring segments include opposed radially projecting ears with fastener receiving bores and radially projecting lugs adapted to provide for connecting the ring assembly to a second ring assembly or gland clamped to the pipe section which is to be restrained in connection with the pipe fitting to which the backup ring assembly is clamped. The circumferential extent of the ring segments is preferably less than 180.degree. to accommodate a range of pipe fitting diameters with a single size ring segment.
    Type: Grant
    Filed: June 12, 1998
    Date of Patent: May 23, 2000
    Assignee: EBAA Iron, Inc.
    Inventor: Michael L. Lundstrom
  • Patent number: 5544922
    Abstract: A wedge assembly restraint, featuring clip stops and a flexible, resilient retainer clip, for restraining a wedge assembly in the clamping block of a pipe junction holder.
    Type: Grant
    Filed: April 21, 1995
    Date of Patent: August 13, 1996
    Assignee: EBAA Iron, Inc.
    Inventors: Dennis D. Shumard, Michael L. Lundstrom