Patents Assigned to Poly Seal, Inc.
  • Interference compression seal
    Patent number: 4032159
    Abstract: An interference compression seal comprising a delta-shaped seal of relatively soft elastomeric material adapted to be placed in a groove between relatively moving machine parts with the apex of the delta directed radially outwardly creating a line seal and a pair of somewhat triangularly shaped anti-extrusion rings of rigid synthetic resinous material respectively engaging one of the sloped or bevelled surfaces (diagonal sides) of the delta-shaped seal.
    Type: Grant
    Filed: October 28, 1975
    Date of Patent: June 28, 1977
    Assignee: Poly Seal, Inc.
    Inventor: Gordon T. Zitting