Pipe fitting for liquid or steam

Details Pipe fitting for liquid or steam Pipe fitting for liquid or steam

2007-03-27

2007-03-27

Hewitt, James M. (Department: 3679)

Pipe joints or couplings

Packed

Wedge

C285S039000, C285S392000

Reexamination Certificate

active

10927329

ABSTRACT:
A fitting for liquid or steam piping, comprising: an elastic sealing ring; a locating sleeve placed around said sealing ring; an internal teethed lock ring located on the locating ring outer end face; an inner ring located outside of the internal teethed lock ring, the inner surface of the inner ring matching with the outer surface of the pipe to be coupled, the inner ring further including a tapered surface and external threads on the outer surface of the inner ring; an outer ring with threads on its internal surface for matching the external thread on said inner ring, as well as methods for connecting pipes using the fitting.

REFERENCES:
patent: 3365219 (1968-01-01), Nicolaus
patent: 3367684 (1968-02-01), Anderson
patent: 3679241 (1972-07-01), Hoffmann
patent: 4930816 (1990-06-01), Biing-Yih
patent: 4993755 (1991-02-01), Johnston
patent: 5496076 (1996-03-01), Lin
patent: 6183022 (2001-02-01), Guest
patent: 6464266 (2002-10-01), O'Neill et al.
patent: 2003/0111840 (2003-06-01), O'Neill et al.
patent: 2004/0239115 (2004-12-01), Wilk et al.

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