Pipe joints or couplings – With casing – lining or protector – Insulated
Patent
1987-10-20
1989-01-31
Arola, Dave W.
Pipe joints or couplings
With casing, lining or protector
Insulated
285 55, 285330, 285353, 285354, 285903, F16L 1112
Patent
active
048011584
ABSTRACT:
A pipe joint includes a joint body having an internal thread portion formed in the interior thereof, a bush having formed on the outer periphery thereof an external thread portion helically meshed with the internal thread portion of the joint body, a gasket accommodated within the interior of the joint body, and a retainer having formed on one end thereof on the side of the joint body a flange of increased wall thickness which is pushed toward the joint body by the end face of the external thread portion of the bush. The flange of the retainer may be provided with at least one engaging projection extending radially outwardly from the outer periphery thereof and, in this case, the internal thread portion of the joint body is provided therein with at least one lock portion which is engaged with the at least one engaging projection of the flange.
REFERENCES:
patent: 1574052 (1926-02-01), Mueller
patent: 2477969 (1949-08-01), Donner
patent: 3507171 (1970-03-01), Baron
patent: 3643984 (1972-02-01), Bucceri
patent: 3967839 (1976-07-01), Dunmire
patent: 4437691 (1984-03-01), Laney
patent: 4630850 (1986-12-01), Saka
patent: 4674775 (1987-06-01), Tajimu
Adams Bruce L.
Arola Dave W.
Kitz Corporation
Wilks Van C.
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