Pipe joints or couplings – With indicator – alarm or inspection means
Patent
1990-10-30
1991-12-24
Arola, Dave W.
Pipe joints or couplings
With indicator, alarm or inspection means
285423, 285343, 285354, 2853827, 285541, F16L 2104
Patent
active
050745999
ABSTRACT:
A tube fitting for joining resinous plastic tubing comprises a fitting body having an opening with a conically shaped camming mouth. A tube extends into the opening. A first ferrule is slidably received on the tube and has an exterior surface which faces the camming mouth. A second ferrule is also slidably received on the tube at a location outwardly of the opening and the first ferrule. The second ferrule has a nose portion which engages the first ferrule adjacent the tube and is snap fitted within a recess formed circumferentially of the tube prior to association of the tube with the fitting. The nose portion of the second ferrule is engaged in the recess in axial driving engagement with the tube prior to make-up of said fitting. A nut member is threadedly engaged with the body for driving the first and second ferrules into the camming mouth during fitting make-up.
REFERENCES:
patent: 2484815 (1949-10-01), Crawford
patent: 3103373 (1963-09-01), Lennon et al.
patent: 3402949 (1968-09-01), Mahoney
patent: 3445128 (1969-05-01), Teeters
patent: 3584900 (1971-06-01), Lennon
patent: 3695647 (1972-10-01), Pugliese
patent: 3708186 (1973-01-01), Takagi et al.
patent: 4076286 (1978-02-01), Spontelli
patent: 4500118 (1985-02-01), Blenkush
patent: 4799717 (1989-01-01), Kingsford
patent: 4826218 (1989-05-01), Zahuranec
patent: 4871196 (1989-10-01), Kingsford
Johnston Lonnie E.
Patil Appasaheb T.
Stenger Joseph M.
Williams Peter C.
Wirbel Stephen R.
Arola Dave W.
Bordas Carol I.
Crawford Fitting Co.
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