Ferrule with radial crown

Pipe joints or couplings – Deformed – By separate deformable element

Reexamination Certificate

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Details

C285S342000, C285S348000

Reexamination Certificate

active

07922217

ABSTRACT:
A ferrule for a metal tube fitting includes an annular body having a generally cylindrical radially interior wall extending through the center of the ferrule. An outer radial wall extends from the ferrule front end to a rearward flange portion of the annular body. The outer radial wall has: a first tapered portion extending from the ferrule front end with an increasing radial dimension towards the rearward flange portion, the first tapered portion extending to a crown portion, the crown portion including a convex surface that tapers radially inwardly towards the rearward flange portion.

REFERENCES:
patent: 2641489 (1953-06-01), Hedberg, Jr.
patent: 3120969 (1964-02-01), Schmohl
patent: 3294426 (1966-12-01), Lyon
patent: 3325192 (1967-06-01), Sullivan
patent: 3736008 (1973-05-01), Crawford
patent: 3787080 (1974-01-01), Daniel
patent: 4230349 (1980-10-01), Normark
patent: 4235461 (1980-11-01), Normark
patent: 4556242 (1985-12-01), Kowal et al.
patent: 6073976 (2000-06-01), Schmidt et al.
patent: 6461448 (2002-10-01), Williams et al.
patent: 6629708 (2003-10-01), Williams et al.
patent: 60-121585 (1985-08-01), None
patent: 11-201347 (1999-07-01), None
Office action from Japanese Application No. 571019/01 dated Sep. 14, 2010.

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