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Method and apparatus for controlled production of a gasRelated Patent Categories: Chemical Apparatus And Process Disinfecting, Deodorizing, Preserving, Or Sterilizing, For Deodorizing Of, Or Chemical Purification Of, Or Generation Of, Life-sustaining Environmental GasMethod and apparatus for controlled production of a gas description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20060171863, Method and apparatus for controlled production of a gas. Brief Patent Description - Full Patent Description - Patent Application Claims
CROSS-REFERENCED APPLICATIONS [0001] This application is a continuation of U.S. patent application Ser. No. 11/045,805 entitled "METHOD AND APPARATUS FOR CONTROLLED PRODUCTION OF A GAS" (Docket No. ROSS 3050000) filed Jan. 28, 2005, which relates to and claims priority from co-pending U.S. patent application Ser. No. 10/718,131 entitled "METHOD AND APPARATUS FOR GENERATING OXYGEN" (Docket No. ROSS 2864000), filed Nov. 20, 2003, and co-pending U.S. patent application Ser. No. 10/856,591, entitled "APPARATUS AND DELIVERY OF MEDICALLY PURE OXYGEN" (Docket No. ROSS 2934000), filed May 28, 2004, the contents of each of which are hereby incorporated by reference for all purposes. FIELD OF THE INVENTION [0002] The present invention relates generally to a gas delivery system and, more particularly, to a system that provides an activation method and apparatus as well as a method and apparatus for improving and controlling the gas yield, flow rates and gas production duration. DESCRIPTION OF THE RELATED ART [0003] Oxygen and other gas generators using chemical reactions have been known for some time. However, none of the conventional devices relating to chemical gas generators have resulted in variable control of the gas generation, while providing higher outputs of gas volume and flow rate, and simultaneously maintaining or improving control of pressure, temperature, and so forth. Gas volume and flow rate are particularly important in emergency oxygen markets. For example, institutions such as the Food & Drug Administration, the American Heart Association and the American Medical Association have required or recommended, as the case may be, a delivery of 90 liters over a 15 minute period, or alternatively an average or minimum flow rate of 6 liters per minute over a 15 minute period. Some attempts to control the flow rate of oxygen have included a catalyst with a gum Arabic solution. The resultant reaction reaches a flow rate of 2 liters per minute after 30 minutes. Other devices create a tablet out of an oxygen generating agent, which similarly produces a low reaction onset (the flow rate at which the reaction commences) and low flow rates over the reaction period. These prior attempted solutions may not be suitable for emergency applications, usually medical in nature or situations where life-threatening factors are present where high flow rates of at least 2 liters per minute to 6 liters per minute or higher are required almost instantly. [0004] In addition, conventional generators have had limited adoption in commerce and in industry. There are several possible factors contributing to this lack of adoption. These factors may include one or a combination of unfavorable characteristics relating to reusability, safety, ease of use/operation, speed of use, heat management, cost, weight, aesthetic design, environmental impact, manufacturability, portability, medical efficacy, effectiveness, flow rate, gas yield, reaction stability, and purity of the gas. Some or all of these characteristics are not addressed, or are inadequately addressed, by the designs in the prior art. [0005] Designs in the prior art have not adequately addressed flow rate and total gas yield. Depending on the situation, such as for oxygen production in emergency situations, high flow rates may be required. For example, the United States Food and Drug Administration (FDA) has long required a flow rate performance for oxygen generators of at least 6 liters per minute over 15 minutes in order to obtain market clearance for over the counter purchase, resulting in at least a total oxygen yield requirement of 90 liters. [0006] High pressures generated inside the reaction chamber generally accompany higher flow rate outputs or requirements. High pressure, such as can be created by confined gases can be particularly dangerous. [0007] Therefore, a need exists for a method and/or apparatus for activating gas production and controlling gas production from a chemical reaction that addresses at least some of the problems associated with conventional methods and apparatus for producing gases, and more specifically medically pure oxygen. SUMMARY OF THE INVENTION [0008] The present invention provides an apparatus for generating gas from a plurality of separated chemicals. In one embodiment, a plurality of reaction chambers operate cooperatively when the separated chemicals are combined to generate the gas. The flow rate and the total yield can then be varied based on the proportion of separated chemicals in each reaction chamber. BRIEF DESCRIPTION OF THE DRAWINGS [0009] For a more complete understanding of the present invention and the advantages thereof, reference is now made to the following descriptions taken in conjunction with the accompanying drawings, in which: [0010] FIG. 1 is a diagram, partly in section, depicting an exploded side view of gas activation, production, dispensing and control vessel in accordance with an embodiment of the present invention; [0011] FIG. 2 is a diagram, partly in section, depicting a side view of a primed gas activation, production, dispensing and control vessel; [0012] FIG. 3 is a schematic sectional view of the gas activation, production, dispensing and control vessel, in use, with the spiked plungers inserted; [0013] FIG. 4A is a plan view of an example of a screen; [0014] FIG. 4B is a sectional view of the screen depicted in FIG. 4A; [0015] FIG. 5A depicts a plan view of a foam breaker, taken along the lines 5B, 5C; [0016] FIG. 5B depicts a cross sectional view of the foam breaker of FIG. 5A; [0017] FIG. 5C depicts a cross sectional view of the foam breaker of FIGS. 5A and 5B when compressed; [0018] FIG. 6A depicts a plan cross sectional view of a handle useful in connection with the present invention; [0019] FIG. 6B depicts a side cross sectional view of a handle useful in connection with the present invention, taken along the line 6B; Continue reading about Method and apparatus for controlled production of a gas... 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