Compact fire sprinkler attachment insert

Details Compact fire sprinkler attachment insert Compact fire sprinkler attachment insert

2008-09-23

2008-09-23

Tran, Len (Department: 3752)

Metal working

Method of mechanical manufacture

Gas and water specific plumbing component making

C169S016000, C169S017000, C285S355000

Reexamination Certificate

active

11227859

ABSTRACT:
The invention satisfies this need. The invention is an internally threaded insert for use with a polymetric pipe fitting in a fire sprinkler system. The insert comprises an outer side surface, an outer rearward surface and an outer forward surface. The outer forward surface is adapted to retain a fire sprinkler at a forward end of the insert. The outer side surface of the insert is sized and dimensioned so as to closely match the bores of standard polymeric pipe fittings, so as to be capable of being slidably and snugly received into the bores of a standard polymeric pipe fitting. The insert can be conveniently affixed within the bores by non-mechanical means, such as by gluing.

REFERENCES:
patent: 1681470 (1928-08-01), Drees
patent: 2667933 (1954-02-01), Stack
patent: 3834462 (1974-09-01), Orloff et al.
patent: 5286001 (1994-02-01), Rafeld
patent: 5775378 (1998-07-01), Auvil et al.
patent: 6540261 (2003-04-01), Painter et al.
patent: 2002/0185282 (2002-12-01), Kretschmer
patent: 2006/0225895 (2006-10-01), Grant

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