Double piping structure

Details Double piping structure Double piping structure

1992-03-27

1993-07-06

Arola, Dave W.

Pipe joints or couplings

With leakage or drip disposal

Weep holes

285 21, 285 55, 285915, F16L 5500

Patent

active

052247384

ABSTRACT:
A connecting structure of resinous double pipes, having an external pipe and an internal pipe coated on an inner surface of the external pipe. The connecting structure comprises respective ends of opposite two external pipes; respective U-shaped ends of opposite two internal pipes; a clamping member for sealing and fixing a side of the U-shaped end enclosing the end of the external pipe; a joint ring disposed between respective ends of two double pipes opposite each other, having the same outer diameter as the external pipe; a joint socket mounted on an outer surface of a pair of the double pipes jointed by the joint ring; a bead retaining gap formed between an inner surface of the joint socket and the clamping member; and a gasket disposed between a bottom of the U-shaped internal pipe and the end of the external pipe.

REFERENCES:
patent: 3563573 (1971-02-01), Crompton
patent: 3575445 (1971-04-01), French
patent: 3977704 (1976-08-01), Meyer
patent: 4277091 (1981-07-01), Hunter
patent: 4856828 (1989-08-01), Kessler et al.
patent: 4865356 (1989-09-01), Moore et al.

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