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1. US5878771 - Precision gas blender

Office
United States of America
Application Number 08681726
Application Date 29.07.1996
Publication Number 5878771
Publication Date 09.03.1999
Grant Number 5878771
Grant Date 09.03.1999
Publication Kind A
IPC
G05D 11/13
GPHYSICS
05CONTROLLING; REGULATING
DSYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
11Control of flow ratio
02Controlling ratio of two or more flows of fluid or fluent material
13characterised by the use of electric means
G05D 11/00
GPHYSICS
05CONTROLLING; REGULATING
DSYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
11Control of flow ratio
CPC
G05D 11/133
GPHYSICS
05CONTROLLING; REGULATING
DSYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
11Ratio control
02Controlling ratio of two or more flows of fluid or fluent material
13characterised by the use of electric means
131by measuring the values related to the quantity of the individual components
133with discontinuous action
Y10T 137/0352
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
10TECHNICAL SUBJECTS COVERED BY FORMER USPC
TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
137Fluid handling
0318Processes
0324With control of flow by a condition or characteristic of a fluid
0329Mixing of plural fluids of diverse characteristics or conditions
0352Controlled by pressure
Y10T 137/2499
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
10TECHNICAL SUBJECTS COVERED BY FORMER USPC
TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
137Fluid handling
2496Self-proportioning or correlating systems
2499Mixture condition maintaining or sensing
Y10T 137/87668
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
10TECHNICAL SUBJECTS COVERED BY FORMER USPC
TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
137Fluid handling
8593Systems
87571Multiple inlet with single outlet
87652With means to promote mixing or combining of plural fluids
8766With selectively operated flow control means
87668Single actuator operates plural flow control means
Y10T 137/87692
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
10TECHNICAL SUBJECTS COVERED BY FORMER USPC
TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
137Fluid handling
8593Systems
87571Multiple inlet with single outlet
87676With flow control
87684Valve in each inlet
87692With common valve operator
Applicants MAYEAUX; PAUL HOWARD
Inventors Mayeaux Paul Howard
Agents Akin, Gump, Strauss, Hauer & Feld, L.L.P.
Priority Data 08192297 01.02.1994 US
Title
(EN) Precision gas blender
Abstract
(EN)

Apparatus and methods for precision batch or continuous flow blending of gases are described. Pulsatile precision metering valves having substantially zero dead space are employed to introduce gases to a mixing chamber or manifold in predictable uniform quantities to achieve precision gas blends according to predetermined criteria. During batch processing, gases to be blended are repeatedly characterized by the change in mixing vessel pressure with respect to time immediately after blending. Estimates of additional amounts of a given gas to be added to achieve a desired final partial pressure of the given gas in the mixing vessel are based on empirical data previously measured and stored for the gas in question.

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