Pipe joints or couplings – With assembly means or feature – Molded joint facilitator
Patent
1978-08-07
1981-03-31
Arola, Dave W.
Pipe joints or couplings
With assembly means or feature
Molded joint facilitator
285423, 285DIG16, F16L 1310
Patent
active
042589355
ABSTRACT:
The bell end of a bell and spigot joint is disclosed herein and includes an end section of a plastic pipe, an axially extending circumferential insert located concentrically within this end section, and a circumferential sealing gasket located within a groove in the inner surface of the insert. A method of making this bell end is also disclosed.
REFERENCES:
patent: 2451070 (1948-10-01), Chamberlain
patent: 3620875 (1971-11-01), Guglielmo
patent: 3620876 (1971-11-01), Guglielmo
patent: 3887992 (1975-06-01), Parmann
patent: 4047739 (1977-09-01), Aitken
French David W.
Rodrigo Peter
Whalen Kemener J.
Arola Dave W.
Johns-Manville Corporation
Kelly Jospeh J.
Krone Robert M.
O'Connor Gregory W.
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