Pipe joints or couplings – Elbow
Patent
1975-10-14
1977-09-27
Callaghan, Thomas F.
Pipe joints or couplings
Elbow
285321, 285388, F16L 1900
Patent
active
040507220
ABSTRACT:
Each section of a conduit with a constant diameter axial passageway has male pipe threads formed on its outer wall surface at one end. A coupling sleeve is retained captively on the other end of the conduit section by a resilient lock ring means positioned partially in an annular lock ring groove disposed on the outer surface of the conduit section axially inwardly of the end face of the conduit section, i.e. -- in a direction along the conduit section away from this end face, and partially in an annular lock ring groove disposed on the inner surface of the coupling sleeve. The lock ring means spans the two annular lock ring grooves to prevent the coupling sleeve from being pulled axially outwardly off the conduit section.
REFERENCES:
patent: 459910 (1891-09-01), Hogan
patent: 738503 (1903-09-01), Waters
patent: 1119752 (1914-12-01), Goethner et al.
patent: 1703696 (1929-02-01), Stratford
patent: 2253018 (1941-08-01), Cowles
patent: 2310490 (1943-02-01), Melsom
patent: 2383692 (1945-08-01), Smith
patent: 2390445 (1945-12-01), Mercier
patent: 2901269 (1959-08-01), Rickard
patent: 3434745 (1969-03-01), Jackman
patent: 3447819 (1969-06-01), Borsum et al.
patent: 3544281 (1970-12-01), Phillips
Berger Sidney
Buda Salvatore
Weintraub Burton
Berger Industries, Inc.
Callaghan Thomas F.
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