Electrically insulated tube union

Details Electrically insulated tube union Electrically insulated tube union

1991-08-27

1992-05-19

Reese, Randolph A.

Pipe joints or couplings

With casing, lining or protector

Insulated

285 52, 285247, 2853324, 285423, F16L 4700

Patent

active

051141906

ABSTRACT:
An electrically insulated tube union includes a pair of tube fitting assemblies and an electrically non-conductive connector. Each tube fitting assembly has a fitting body, a fitting nut and a threaded ferrule. The connector has a body with an external radial flange between the ends thereof. The connector body is externally threaded on either side of the flange and the threads are axially spaced from the connector ends. The ferrules threadably engage the connector threads and are captured between their respective fitting nut and body. Each ferrule has a tapered end with an unthreaded portion that seats in a frusto-conical portion of the fitting body so that when the fitting nut and body are threadably engaged the ferrule unthreaded end grips the unthreaded connector ends to provide a fluidtight and electrically insulated coupling between the pair of tube fitting assemblies.

REFERENCES:
patent: Re25047 (1953-09-01), Risley
patent: 3326582 (1967-06-01), Currie
patent: 3451697 (1966-09-01), Bula
patent: 3686747 (1972-08-01), Bagnulo
patent: 3992043 (1976-11-01), Whitley
patent: 4030742 (1977-06-01), Eidelberg et al.
patent: 4595218 (1986-06-01), Carr et al.
patent: 4886938 (1989-12-01), Rottmar et al.
Technical Bulletin No. 1-87 "Dielectric Fittings" (From Cajon Company-a Swagelok Company).

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