Patents by Inventor Michael J. C. Tozer

Michael J. C. Tozer 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).

  • Metallic stem seal with inclined channel and integral support member
    Patent number: 5577742
    Abstract: A valve stem seal comprising a cylindrical stem-sealing membrane and a membrane supporting flange. The membrane has a corrugated profile which defines one or more loop-shaped channels bounded by contact surfaces on a radially inner face and each channel is inclined at 5.degree.-10.degree. with respect to a plane perpendicular to the longitudinal axis. The channels form a labyrinth seal for any fluid leaking along the outer surface of the stem. A support bearing for the stem is provided on the membrane supporting flange.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: November 26, 1996
    Assignee: Specialist Sealing Limited
    Inventors: Terence P. Nicholson, Michael J. C. Tozer
  • Hollow metallic sealing ring
    Patent number: 4798392
    Abstract: A hollow metallic sealing ring which in radial cross-section is of serpentine shape with a pair of divergent limbs connected by at least one contiguous single loop with substantially straight sides. The transition curve between the sides of the loop and the divergent limbs is of constant radius and the free ends of the limbs are straight and substantially parallel.
    Type: Grant
    Filed: October 23, 1987
    Date of Patent: January 17, 1989
    Assignee: Heat Transfer Technology Ltd. (Jersey)
    Inventor: Michael J. C. Tozer
  • Hollow metallic sealing ring
    Patent number: 4784397
    Abstract: A hollow metallic sealing ring comprised in radial cross-section of pair of outwardly convex limbs contiguous with a loop formation having at least one straight sided loop, the limbs, from their junctions with the ends of the loop formation being of increasing radius towards their free ends which are straight and substantially parallel.
    Type: Grant
    Filed: November 16, 1987
    Date of Patent: November 15, 1988
    Assignees: Michael J. C. Tozer, Specialist Sealing Limited
    Inventor: Michael J. C. Tozer
  • Cylinder end seal
    Patent number: 4597596
    Abstract: For sealing the joint between a pipe end (2) and a pipe or housing (3) into which it is to be inserted, a metal sleeve (1) has a part (a) which is secured, such as by welding, to the pipe end (2), a first annular corrugation (b) and a second annular corrugation (c) which is of greater diameter than the first annular corrugation (b) and resiliently deformable into sealing engagement with the pipe or housing (3).
    Type: Grant
    Filed: November 7, 1984
    Date of Patent: July 1, 1986
    Assignee: Heat Transfer Technology Limited
    Inventor: Michael J. C. Tozer