Pipe joints or couplings – With means blocking release of holding means – Thread lock
Patent
1974-10-21
1976-05-25
Arola, Dave W.
Pipe joints or couplings
With means blocking release of holding means
Thread lock
174 75C, 174 65R, 285250, 285331, 285384, F16L 1500
Patent
active
039588181
ABSTRACT:
A fitting assembly is disclosed for connection to the ends of flexible tubing. The fitting assembly comprises a first and second element and a sleeve. The first element includes a threaded bore and a plurality of flanged tines extending axially therefrom. The flexible tubing is adapted to be threaded through the bore of the first element until a portion of its end extends alongside and beyond the tines. The second element includes a bore having interior annular ridges formed on the interior surface thereof for receiving the flanged tines of the first element. The second element also includes an annular shoulder located on the sidewall of the bore. The sleeve is cylindrical in construction and includes an enlarged end. The sleeve is adapted to fit snugly within the end of the flexible tubing prior to the interconnection of the first and second elements. After the first element is threaded onto the tubing and the sleeve is inserted therein, the first and second elements are brought together for connection. During this movement, the enlarged end of the sleeve abuts the shoulder of the second element and thereafter acts on the flexible tubing to axially compress the free end of the tubing located between the tines against the threaded connection of the first element. This causes the threads of the free end of the tubing to expand radially and frictionally engage the interior surfaces of the two elements. This frictional engagement prevents the flexible tubing from unthreading from its connection with the fitting. The sleeve also functions to prevent the threads of the free end of the tubing from radially contracting and being pulled out of threaded connection with the first element.
REFERENCES:
patent: 956077 (1910-04-01), Greenfield
patent: 1315784 (1919-09-01), Levitt
patent: 1814474 (1931-07-01), Metcalf
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patent: 1927390 (1933-09-01), Church
patent: 2323912 (1943-07-01), Johnson
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patent: 2503169 (1950-04-01), Phillips
patent: 3291895 (1966-12-01), Van Dyke
patent: 3653691 (1972-04-01), Brom
patent: 3687495 (1972-08-01), Sukomuto et al.
patent: R21603 (1940-10-01), Guarnaschelli
Arola Dave W.
Litton Industrial Products Inc.
Vargo Robert M.
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