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. 18, 2017
Filed:
Oct. 29, 2015
Honeywell International Inc., Morris Plains, NJ (US);
Stuart James Heath, Surrey, CA;
Honeywell International Inc., Morris Plains, NJ (US);
Abstract
Coaxial probes for guided wave radar level transmitters have an inner rod within an outer tube. Transmission line impedance changes where the space between the two fills with process fluid, causing a reflection of radar energy. Time of flight calculations yield the distance to the product and thus the level of the fluid in a tank. The inner rod and outer rod should maintain their spacing because a reflection can occur if the inner rod moves too close to the outer tube wall. Spacers can maintain the spacing. The spacers should be retained so that their location over time doesn't change. Retention strategies involving shoulders or discontinuities in the inner rod or outer tube can cause measurement errors. Applications requiring high temperature resistance and high chemical compatibility lead to ceramic spacers instead of plastic spacers. Slip fits are needed when ceramics are too stiff for snap-in functionality.