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:
May. 29, 2012
Filed:
Sep. 24, 2008
Applicants:
Charles M. Princell, Graham, NC (US);
Bruce Althouse, Graham, NC (US);
Inventors:
Charles M. Princell, Graham, NC (US);
Bruce Althouse, Graham, NC (US);
Assignee:
Armacell Enterprise GmbH, Muenster, DE;
Primary Examiner:
Int. Cl.
CPC ...
F16L 9/14 (2006.01);
U.S. Cl.
CPC ...
Abstract
A flexible, composite duct insulation structure includes a first layer forming an insulation layer, and a second layer forming a structural support layer. The first layer is adhered to the second layer by an adhesive. The composite duct insulation structure has sufficient strength and radially outward-directed spring force of the structure alone so as to press and hold the insulation structure against the interior wall of a tubular duct without additional spring structure or retaining structure.