The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 19, 1994
Filed:
Mar. 08, 1993
Applicant:
Inventors:
David C Fenimore, Sierra Madre, CA (US);
Walter H McHenry, Covina, CA (US);
James L Blumberg, Sylmar, CA (US);
Assignee:
Vici Metronics Incorporated, Duarte, CA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16K / ; F16K / ;
U.S. Cl.
CPC ...
137613 ; 137501 ; 13761419 ;
Abstract
There is disclosed a system for delivering gas at a predetermined rate of flow, including a diaphgram type flow controller, a pressure regulator for providing a constant flow of gas to the flow controller, and a microprocessor controlled stepper motor utilizing an optical encoder to adjust the rate of flow of a gas leaving the controller without having to use a gas flow measurement device to monitor the flow rate.