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:
Nov. 04, 2014
Filed:
Aug. 06, 2010
Applicant:
James M. Perrin, Livonia, MI (US);
Inventor:
James M. Perrin, Livonia, MI (US);
Assignee:
GM Global Technology Operations LLC, Detroit, MI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F01N 3/00 (2006.01); B60K 15/06 (2006.01); G01F 23/24 (2006.01);
U.S. Cl.
CPC ...
G01F 23/246 (2013.01); B60K 15/061 (2013.01);
Abstract
A tank assembly includes a tank defining a chamber that is configured to store a selectively variable volume of liquid. A positive temperature coefficient heater is disposed within the chamber. A source of electrical energy is in selective electrical communication with the heater and is configured to transfer electrical current to the heater. A controller is operatively connected to the heater and is configured to monitor the amount of electrical current to the heater. The controller is programmed to determine the volume of liquid in the chamber based on the amount of current transferred to the heater.