Pipe joints or couplings – With casing – lining or protector – Lined
Patent
1983-04-12
1986-11-25
Arola, Dave W.
Pipe joints or couplings
With casing, lining or protector
Lined
285292, 285336, 285363, 285370, 285371, 285423, 285919, F16L 914
Patent
active
046244867
ABSTRACT:
A structure at a connection where at least two resin pipes are connected to each other end-to-end. The structure is characterized by annular resin body means provided on the inner periphery of the end of at least one of the resin pipes and having at least one end positioned in an annular recessed portion formed in the inner periphery of said one resin pipe. Since the above-mentioned end (which is more subject to the action of internal fluid than the other end) is positioned in the annular recessed portion, the resin body means is not eroded by the internal fluid.
REFERENCES:
patent: 1001682 (1911-08-01), Pratt
patent: 1484355 (1924-02-01), Moir et al.
patent: 1945279 (1934-01-01), Kraner
patent: 3508766 (1970-04-01), Kessler et al.
patent: 3612580 (1971-10-01), Jones
patent: 4147381 (1979-04-01), Schwarz
Kanazawa Tomoyoshi
Nakagawa Kenji
Nishino Yoshinori
Uda Tadayoshi
Yamamoto Masahiko
Arola Dave W.
Farley Joseph W.
Hitachi Zosen Corporation
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