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. 03, 1991
Filed:
Jun. 08, 1990
Applicant:
Inventors:
Allan S Jacob, Rochester Hills, MI (US);
Andrzej Zawadzki, Birmingham, MI (US);
Assignee:
Heath Consultants Incorporated, Stoughton, MA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01F / ; G01F / ;
U.S. Cl.
CPC ...
73313 ; 73309 ; 73314 ; 340624 ;
Abstract
A fluid level maintenance sensor or use in a tank test system and which includes an upper sensor coil and a lower sensor coil mounted on a level sensing tube. A float carrying a ferromagnetic ring is operatively mounted in the level sensing tube which causes a fluid transfer signal to be generated when the float and ring are moved upwardly or downwardly to transfer fluid out or into the level sensing tube to maintain a selected fluid level in the tube.