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. 16, 2007
Filed:
Feb. 23, 2005
James H. Boschma, Jr., Huntsville, AL (US);
Callum R. Sullivan, New Market, AL (US);
Michael Mcnabb, Huntsville, AL (US);
James H. Boschma, Jr., Huntsville, AL (US);
Callum R. Sullivan, New Market, AL (US);
Michael McNabb, Huntsville, AL (US);
Information Systems Laboratories, Inc., San Diego, CA (US);
Abstract
An airship ballast system includes an engine driven propeller and a cooling tube that is positioned coplanar with the propeller and outside its tip path. One end of the cooling tube is connected to receive exhaust gases from the engine while the other end is connected to a ballast tank. In operation, exhaust gases from the engine are cooled as they transit the cooling tube, and water condensed from the cooled exhaust gases is pumped to the ballast tank to maintain a ballast for the airship.