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:
Apr. 05, 1994
Filed:
Aug. 27, 1992
John J Lord, Springfield, IL (US);
Wesley J Bachman, Auburn, IL (US);
David M Beams, Fort Atkinson, WI (US);
C.A.P., Inc., Benson, MN (US);
Abstract
A liquid flow rate detector adapted for detecting whether a rate of flow for liquid flowing through a conduit is above or below a generally predetermined liquid flow rate, and for developing different control signals in response to detecting flow rates above and below that generally predetermined liquid flow rate. The detector includes first and second thermally conductive liquid contact members supported for contact with the flowing liquid; and electric circuitry that detects the ambient temperature of the flowing liquid through the first probe, supplies a limited amount of heat in an attempt to heat the second liquid contact member to a threshold temperature above that ambient temperature, detects the temperature of said second liquid contact member, generates a first control signal when the temperature of the second liquid contact member is at least at the threshold temperature to detect a liquid flow rate below the predetermined liquid flow rate at which the flowing liquid is not capable of cooling the second liquid contact member below the threshold temperature, and generates a second signal when the temperature of the second liquid contact member is maintained below the threshold temperature to detect a liquid flow rate above the predetermined liquid flow rate at which the flowing liquid is capable of cooling the second liquid contact member below the threshold temperature.