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:
Jul. 06, 2004
Filed:
Mar. 27, 2002
Frederick P. Keller, Alto, MI (US);
Noble Polymers, LLC, Grand Rapids, MI (US);
Abstract
A damper for an air passageway comprises a rigid carrier plate having opposed faces defined by a periphery with a shape generally corresponding to but smaller than the shape of a cross-section of the air passageway and formed of a material having a melting point above an activation temperature range; a heat-expandable sealing material mounted to at least one of the opposed faces of the rigid carrier plate and which is adapted to expand at a temperature in the activation temperature range; the sealing material, when activated, is adapted to expand radially from the rigid carrier plate to form an integral seal with the carrier plate. The heat-expandable sealing material can be integrally molded to the outer periphery of the carrier plate. A process for making the damper with integral seal is also disclosed.