Durable plastic/metal transition fitting

Details Durable plastic/metal transition fitting Durable plastic/metal transition fitting

1993-10-13

1995-08-01

Arola, Dave W.

Pipe joints or couplings

Elbow

285330, F16L 5500

Patent

active

054374812

ABSTRACT:
A fitting suitable for coupling a plastic pipe to an externally threaded metal element, such as a sprinkler head, comprises a coupling, an external, metallic reinforcing collar on the coupling, an internally threaded insert in the coupling, and an O-ring. The collar is shaped to prevent rotation, and is held in place by a lip on the insert. The O-ring is held in a chamfered recess on the external surface of the insert.

REFERENCES:
patent: 3712631 (1973-01-01), Forchini et al.
patent: 4428602 (1984-01-01), Lambot et al.
patent: 4919461 (1990-04-01), Reynolds
patent: 5109929 (1992-05-01), Spears
patent: 5215341 (1993-06-01), Namakura et al.
Spears Manufacturing Co. Brochure, "PVC & CPVC Transition Adapters", BR-2-0393, Feb. 1993.
Spears Manufacturing C. Brochure, "CPVC Schedule 80 and 150 Series Large Diameter Fittings", 800C-0293, Printed Jan. 1993.
Spears Manufacturing C. Brochure, "CPVC Schedule 80 and 150 Series Large Diameter Fittings", 800C-0293A, Printed Jan. 1993.
Spears Manufacturing Co. Brochure, "BlazeMaster Fire Sprinkler Piping Products" List Price Schedule, FS-1-0592, Printed Apr. 1992.

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