Maurice L Brooks

US Patent:

D4201183, Feb 1, 2000

Filed:

Oct 30, 1998

Appl. No.:

D/095849

Inventors:

John Radko - Irvine CA
James Ronald Sechrist - Newport Beach CA
Robert Jantz - Tustin CA
Rick Hearn - Yorba Linda CA
Ray Y. Ong - Yorba Linda CA
Eddie Chung - Santa Ana CA
Raymond Steve Leon - Corona CA
Matt F. Duncan - San Clemente CA
Maurice Brooks - Loma Linda CA

Assignee:

Sechrist Industries, Inc. - Anaheim CA

International Classification:

2304

US Classification:

D23370

US Patent:

46026533, Jul 29, 1986

Filed:

Nov 1, 1984

Appl. No.:

6/667141

Inventors:

Alberto Ruiz-Vela - Cucamonga CA
Maurice J. Brooks - Loma Linda CA
Douglas F. DeVries - Redlands CA

Assignee:

Bear Medical Systems, Inc. - Riverside CA

International Classification:

G05D 1102

US Classification:

137 88

Abstract:

A gas blending system includes a proportional mixing valve having a valve element movable between first and second limits of travel corresponding to a minimum and maximum percentage, respectively, of one of the gases in the blended mixture. The position of the valve element is detected by a detection mechanism, producing a position signal inputted to a microcomputer. The microcomputer also receives a control signal representing a desired percentage of one of the gases to be blended. The microcomputer calculates a desired valving element position as a function of the value of the control signal, and generates a drive signal as a function of a comparison made by the microcomputer between the detected valve element position and the desired position. A motor drives the valve element to the desired position in response to the drive signal. The system also includes an accumulator for accumulating a selected volume of gas mixture flowing from the outlet of the valve prior to delivery of the mixture to a downstream demand.