Quick coupling for plastic pipe

Details Quick coupling for plastic pipe Quick coupling for plastic pipe

1990-06-25

1992-08-18

Reese, Randolph A.

Pipe joints or couplings

With fluid pressure seal

Flexible lip

285371, 285373, 285423, F16L 1704

Patent

active

051392909

ABSTRACT:
A quick coupling for plastic pipe in which the ends of each plastic pipe are fitted with a metallic sleeve. The metallic sleeve is contoured with a hollow boss at one end and spaced apart from the boss is a radially extending circular groove. The metallic sleeve may be counterbored. The metallic sleeve may be embedded in the plastic pipe end by various heat forming techniques. Further, the plastic pipe may be internally threaded. Then a hollow plug of the same plastic as the pipe with external threads at one end is contoured to form a collar with the face of the unthreaded end. The collar is recessed to receive the boss. The metallic sleeve is fitted over the threads and seated with the boss in the recess of the collar. The plastic plug is then threadably engaged in the end of the plastic pipe and sealed with an o-ring. Two pipes, each having a metallic sleeve thereon, when aligned are coupled together by a mechanical clamp having keys which fit the circular groove of each pipe. The clamp maintains a pressure seal about the pipe end so coupled.

REFERENCES:
patent: 3178206 (1965-04-01), Martin et al.
patent: 4039210 (1977-08-01), Wood et al.
patent: 4093280 (1978-06-01), Yoshizawa et al.
patent: 4252349 (1981-02-01), Mahoff
patent: 4519637 (1985-05-01), Folkers
patent: 4557509 (1985-12-01), Giebeler
patent: 4614369 (1986-09-01), Overath et al.
patent: 4629220 (1986-12-01), Crusco
patent: 4660865 (1987-04-01), Workman

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