Device for coupling and flaring a metal pipe

Details Device for coupling and flaring a metal pipe Device for coupling and flaring a metal pipe

1994-08-04

1996-05-21

Arola, Dave W.

Pipe joints or couplings

With indicator, alarm or inspection means

285322, 285368, 285379, F16L 3500

Patent

active

055182755

ABSTRACT:
A pipe coupling device for holding a metal pipe having a selected diameter within a range of a nominal diameter plus or minus a specified tolerance is also useful for easily determining if any pipe is within specifications. A split metal ring having a diameter equal to the nominal diameter for the metal pipe and a transverse split having a width equal to the specified tolerance is placed around the pipe. A flange having a tapered cylindrical bore having diameter such that the diameter plus twice the thickness of the split metal ring equals the nominal diameter of the metal pipe plus the specified tolerance is fitted over the split metal ring. If the pipe is undersized it will slip through the split metal ring. If the pipe is oversized the flange will not fit completely over the metal ring surrounding the pipe.

REFERENCES:
patent: 787791 (1905-04-01), Reynolds
patent: 1291646 (1919-01-01), Hughes
patent: 2165621 (1939-07-01), Donahue et al.
patent: 2269629 (1942-01-01), Kreidel
patent: 2507261 (1950-05-01), Mercier
patent: 3590455 (1971-07-01), Harris
patent: 3606659 (1971-09-01), Robbins
patent: 3668754 (1972-06-01), Boast
patent: 4809418 (1989-03-01), Burli
patent: 4905492 (1990-03-01), Lobakk
Lenz "O-Ring Seal" Tube Fittings, Catalog No. 127R-A, The Lenz Company, Apr. 1992.

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