Elliptical purge valve for snorkels

Details Elliptical purge valve for snorkels Elliptical purge valve for snorkels

2011-03-22

2011-03-22

Bianco, Patricia M (Department: 3772)

Surgery

Respiratory method or device

Draw-type snorkel

C128S201260, C128S201270, C128S201280, C128S201290, C128S200290, C128S206290, C405S186000, C405S187000

Reexamination Certificate

active

07909030

ABSTRACT:
The instant invention incorporates an asymmetrical purge valve tilted to fit within the confines of a chamber having a substantially elliptical cross-section. The elliptical cross-section is oriented to minimize the frontal area presented in the direction of swimming movement. The reduced cross-section results in a corresponding reduction of drag when the diver is swimming underwater.

REFERENCES:
patent: 4872453 (1989-10-01), Christianson
patent: 6129081 (2000-10-01), Wu
patent: 6276362 (2001-08-01), Chen-Lieh
patent: 7047965 (2006-05-01), Ball
patent: 7163012 (2007-01-01), Delphia

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