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:
Sep. 01, 1987
Filed:
Dec. 08, 1986
Robert Steinemann, Thayngen, CH;
Georg Fischer Aktiengesellschaft, Schaffhausen, CH;
Abstract
A method for regulating the flow volume of a fluid medium and apparatus therefor wherein the actual value of the flow volume of the fluid medium is measured and an analogous signal is generated representing the actual value. A signal representing a desired value of flow volume is also generated and is compared with the actual value signal with the analogous differential signal being applied as an electrical control signal consisting of individual pulse signals having a frequency proportional to the value of the analogous differential signal. The control signal is amplified and applied to control either the pressure or the rate of flow of the fluid medium.