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:
Jun. 13, 1989
Filed:
Mar. 17, 1987
Applicant:
Inventors:
Robert E Farnham, Naperville, IL (US);
Fredric W Prill, North Aurora, IL (US);
Assignee:
Barber-Greene Company, DeKalb, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G05B / ;
U.S. Cl.
CPC ...
340606 ; 318644 ; 364510 ;
Abstract
A system to detect partial or complete failure of an accurate meter measuring the flow of a liquid by using a sensor to measure the displacement of the pump as a back-up measurement. A computer is used to compare the feedback from the pump sensor with the meter reading, and if the difference between the two flow measurements is greater than a predetermined amount, an alarm will ring, the meter measurement will be ignored, the system shut down, or some other corrective action instituted by the computer. Redundancy is added to the system without the expense of obtaining an additional precision meter.