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:
Dec. 02, 1997
Filed:
Dec. 15, 1994
Sidney Sitachitt, San Diego, CA (US);
John A Horvath, San Diego, CA (US);
William A Roden, San Diego, CA (US);
Other;
Abstract
A level measuring system for leveling structures using the principal that water seeks its own level. A plurality of sensor vessels each of which includes ultrasonic transducers for measuring the level of a liquid in the vessel. A liquid source provides liquid to the sensors and a vacuum pump withdraws the liquid after measurements are complete. Each sensor vessel includes two ultrasonic transducers, one of which measures the sonic velocity and the other measures the level of the liquid. A calibration device is provided to verify calibration of the level measuring sensor. In one embodiment, the two ultrasonic sensors are arranged vertically in a transparent cylindrical housing. In a second embodiment, a first horizontal bore and a second intersecting vertical bore are provided in a solid material, with the sonic velocity measuring sensor at one end of the horizontal bore and the level measuring sensor in the vertical bore.