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. 09, 1999
Filed:
Sep. 08, 1997
Rong J Chang, Fremont, CA (US);
Keith Dawes, San Mateo, CA (US);
Raychem Corporation, Menlo Park, CA (US);
Abstract
A cavity sealing article for use in a longitudinally extending cavity defined by cavity walls, the cavity having a cross-section within the cavity walls which is to be sealed at a predetermined location, comprises: (a) a driver comprising a crosslinked foamable polymer, the driver having a size, shape, and expansion ratio on foaming such that, when foamed within the cross-section of the cavity at the predetermined location, it substantially but incompletely occupies the cross-section of the cavity; and (b) a sealer comprising an uncrosslinked foamable polymer in intimate contact with the driver and surrounding the driver in the cross-section of the cavity, the sealer having a size, shape, and expansion ratio on foaming such that, when the cavity sealing article as a whole is foamed, the foamed sealer is forced into intimate and sealing contact with the cavity walls.