Title: Pipe coupler

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.

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Inventors: Gray, Paul E. (Gnadenhutten, OH, US)

Application Number: 971216
Filing Date: 1978-12-20
Publication_date: 1980-10-21
Assignee: Universal Sewer Pipe Company (Mogadore, OH)
Primary Class(es): 285/235 285/369, 285/383, 285/423
Other Classes:
US Patent Ref:

3104898	Sep, 1963	MacDonald et al.	285/367.
3394952	Jul, 1968	Garrett	285/236.
3419290	Dec, 1968	Campbell et al.	285/DIG.
3484121	Dec, 1969	Quinton	285/423.
3558164	Jan, 1971	Hovell	285/423.

Other Refs:
Primary Examiner: Arola, Dave W.
Assistant Examiner:
Attorney: Cushman, Darby & Cushman