Plastic pipe fitting

Details Plastic pipe fitting Plastic pipe fitting

1989-08-02

1990-11-20

Arola, Dave W.

Pipe joints or couplings

Convertible

285156, 285175, 285177, 285179, 285423, F16L 2500

Patent

active

049713663

ABSTRACT:
A plastic pipe fitting for use in an underground water sprinkler system. The fitting design uses multi-thread internal pipe threads on various types of fittings such as elbows, T's, side outlet 90.degree. fittings and side outlet T's among other types. The multi-thread design permits at least two sizes of sprinkler heads to be connected as desired into the fitting. An improved inlet barb connection may also be used on the above fittings and on other types of pipe fittings used in the entire water sprinkler system to prevent improper clamping of connecting pipe on the inlet barbs.

REFERENCES:
patent: 432248 (1890-07-01), Rinman
patent: 3551007 (1970-12-01), Martin et al.
patent: 3759445 (1973-09-01), King
patent: 4238131 (1980-12-01), Cleveland
patent: 4266813 (1981-03-01), Oliver
patent: 4688832 (1987-04-01), Ortloff et al.
patent: 4712812 (1987-12-01), Weir
patent: 4774940 (1988-10-01), Linder
patent: 4779904 (1988-08-01), Rich
patent: 4796928 (1989-11-01), Carlin et al.

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