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US 4,874,116 AGranted
Gas blending apparatus
AssigneeMcDantim, Inc.
InventorsMerton R. Fallon, Thomas W. Clements
Life of this patent
Estimating the term…
Abstract
An apparatus for blending two gases together in precisely adjustable proportions. The apparatus includes a mechanically adjustable, blending subassembly adapted to receive the first gas at a predetermined pressure and a one to one force balanced pneumatic relay which is operated by the first gas and which meters the flow of the second gas to the blending subassembly at a pressure substantially equal to the pressure of the first gas being supplied to the blending subassembly.
Claims10
An apparatus for supplying a gaseous mixture to an external system on demand, comprising:
- (a) a source of a first gas under pressure;
- (b) a source of a second gas under pressure;
- (c) a gas blending means in communication with the external system and in communication with said sources of said first and second gases for adjustably blending said gases into a gaseous mixture of pre-determined proportions and for supplying said gaseous mixture to the external system on demand;
- (d) pneumatic relay means in communication with said gas blending means and said sources of said first and second gases for supplying said second gas to said gas blending means on the demand of the external system, said pneumatic relay means including first valving means operable by said first gas under pressure for controlling the flow of said second gas to said gas blending means upon the demand of the external system;
- (e) control means in communication with said sources of said first and second gases for controlling the flow of said first gas to said pneumatic relay means, said control means including second valving means operable by said second gas under a predetermined elevated pressure for controlling the flow of said first gas to said pneumatic relay means.
2 more elements
A beverage dispensing system, comprising:
- (a) a container including dispenser means from which beverage is to be dispensed by the pressure of a gaseous mixture comprising a first gas containing nitrogen and a second gas containing carbon dioxide;
- (b) a source of said first gas under pressure;
- (c) a source of said second gas under pressure;
- (d) a gas blending means in communication with said container and in communication with said sources of first and second gases for blending said gases into a gaseous mixture of adjustable proportions;
- said gas blending means comprising a housing having first and second chambers divided by a porous member and including reciprocal means reciprocally movable within said first chamber from a first position to a second position to divide said first chamber into first and second portions of varying volumes, said second chamber being in communication with said container, said first portion of said first chamber being in communication with said source of said first gas and said second portion of said first chamber being in communication with said source of said second gas;
- (e) a pneumatic relay means in communication with said gas blending means and said sources of said first and second gases for supplying said second gas to said gas blending means upon demand resulting from beverage being dispensed from said container;
- and
- (f) control means in communication with said sources of said first and second gases for controlling the flow of said first gas to said pneumatic relay means and to said gas blending means.
5 more elements
Dependencies are inferred from the claim text.