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scuba <scuba@uc*.be*.ed*> wrote on Sat 30 Jul 1994 22:07:43 -0700
(Subject: More Rbrthr Pat Abstracts), describing various rebreather and other
patent applications. Herewith a go by me at describing the breathing set ideas
mentioned, in simple language:-
Patent Number: 4879996
Title: Closed circuit breathing apparatus
Inventors: Harwood, Jr.; Van N., Williamsville NY; Dosch; Jeffrey J.,
Buffalo NY, Netteland; Loyal G., West Seneca NY
Said to be for use on land. Gas goes in a circuit rather than to and fro.
Two breathing bags, one each side of the canister. The bag upstream of the
canister is spring loaded. Oxygen from cylinder flows steadily and on the way
drives a pump blowing breathed gas through the canister at a constant rate.
Patent Number: 4066076
Title: Rebreathable gas mixing and control device
Inventors: Williamson; Larry H., Fountain Valley, CA
Semi-closed-circuit set. Has a regulator which when the user breathes
delivers a proportionate mixture of new gas and breathed gas via a mixing
chamber. Nature of CO2-remover not specified but presumably a canister.
Patent Number: 03910780
Title: Separative barrier for preferential transport of CO2 and apparatus
employing same
Inventors: Henley; Julian L., New York NY; Chang; Sanlu Y., Lexington MA
CO2-remover for diving rebreathers which gets rid of the CO2 by diffusing it
into the surrounding water like in a fish's gills.
Patent Number: 3710553
Title: CARBON DIOXIDE SCRUBBER AND BREATHING DIAPHRAGM ASSEMBLY FOR DIVING
APPARATUS
Inventors: Parker; Frederick A., Broomall PA; Soult; Charles J., Willingboro
NJ
Assignee: Biomarine Industries, Inc.
A CO2-remover canister with these features:-
(1) Description unclear here, but it may have a double wall which the warm
exhaled `air' first goes through. This keeps the absorbent warm and working at
full speed when diving in cold water.
(2) Baffles and water absorber and water-repelling filters to keep water out
of the absorbent.
(3) Gas (oxygen/etc) supply from cylinder feeds into a regulator in the
canister. It supplies more gas when the pressure in the canister gets less
than ambient (e.g. when the diver sucks at an empty bag).
Patent Number: 5292272
Title: Dual mode swim fin
Inventor(s): Grim; Roger W., Lafayette GA
A swimming fin where the part in front of the wearer's toes is hinged to the
rest. It can be fixed at straight (for swimming) or at a right angle upwards
(for walking).
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