Patents Assigned to Universal Sewer Pipe Company
  • Pipe coupler
    Patent number: 4229028
    Abstract: A coupler for connecting adjacent ends of clay pipe with a generally cylindrical flexible sealing member of urethane or the like having opposing inner and outer central grooves which extend circumferentially and pairs of circumferentially extending outer support grooves flanking the outer central groove. Rigid rings of fiberglass are provided in the grooves. The central ring has an inwardly extending stop portion and unitary sealing lips are provided on the interior surface of the sealing members between the support grooves of each pair.
    Type: Grant
    Filed: December 20, 1978
    Date of Patent: October 21, 1980
    Assignee: Universal Sewer Pipe Company
    Inventor: Paul E. Gray