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. 18, 1979
Filed:
May. 26, 1978
John D Grant, Rockford, IL (US);
Sundstrand Corporation, Rockford, IL (US);
Abstract
A device for indicating the volume of liquid in a fuel tank or like container includes a linear variable differential transformer (LVDT) mounted within the tank, which is divided into a liquid containing section and a gas containing section by a longitudinally movable piston. Pressure gas is provided to the gas containing section of the tank through a port in a tank wall, and urges the piston to follow the liquid level in the tank. The LVDT has a fixed coil housing with a fixed electrical input and a rotatable core actuator. The core actuator is coupled for rotation in response to movement of the piston. Rotation of the actuator effects translational movement of the core within the coil, thereby producing a variable electrical output in response to changes in liquid volume.