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, 2015
Filed:
Jun. 14, 2011
Terence J. Knowles, Lake Barrington, IL (US);
Brian J. Truesdale, Wauconda, IL (US);
Kenneth A. Albrecht, Zion, IL (US);
Steven C. Crusius, Gurnee, IL (US);
Terence J. Knowles, Lake Barrington, IL (US);
Brian J. Truesdale, Wauconda, IL (US);
Kenneth A. Albrecht, Zion, IL (US);
Steven C. Crusius, Gurnee, IL (US);
Illinois Tool Works Inc., Glenview, IL (US);
Abstract
An ultrasonic liquid-height detector employs conductive rods extending from a housing, and corresponding transducers, into a liquid, where elastic seals surround the rods at their exit point from the housing. Acoustic crosstalk between the rods through the seals and the housing (rather than through the liquid) is minimized by displacing the seals from each other as measured through the housing to increase a path length through the housing so that the crosstalk energy is delayed with respect to the direct energy indicating liquid height. A sampling window is positioned to sample transmitted sound across the rods at a time before the arrival of the crosstalk energy.