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:
Jan. 09, 2007
Filed:
Dec. 10, 2004
Rainer Pechtold, Russelsheim, DE;
Andreas Koenekamp, Darmstadt, DE;
Hartmut Stengelin, Mainz, DE;
Andy Kraemer, Ruesselsheim, DE;
Rainer Pechtold, Russelsheim, DE;
Andreas Koenekamp, Darmstadt, DE;
Hartmut Stengelin, Mainz, DE;
Andy Kraemer, Ruesselsheim, DE;
General Motors Corporation, Detroit, MI (US);
Abstract
A liquid hydrogen tank assembly that employs a level sensor inductively coupled through the tank walls so as to minimize one conductive heat path through the tank walls. The tank assembly includes an inner tank and an outer tank having a vacuum layer therebetween to maintain the liquid hydrogen within the inner tank under cryogenic temperatures. A capacitive level sensor is positioned within the inner tank and provides an electrical indication of the level of the liquid hydrogen within the inner tank. The level sensor is electrically coupled to an inner coil within the inner tank. An outer coil is provided proximate the outer tank wall and is electrically coupled to a signal processing and conditioning circuit.