Static structures (e.g. – buildings) – Wall – ceiling – or floor designed for utilities – Having a passageway through the entire wall – ceiling – or...
Reexamination Certificate
2005-06-21
2011-11-08
Glessner, Brian (Department: 3633)
Static structures (e.g., buildings)
Wall, ceiling, or floor designed for utilities
Having a passageway through the entire wall, ceiling, or...
C052S232000, C174S481000
Reexamination Certificate
active
08051614
ABSTRACT:
An intumescent structure provides a hermetic-type barrier within a fiber duct through which communications cabling is extended. The structure is formed of a fire-resistant body possessing a plurality of pre-perforated forms that extend through the body. Each of the pre-perforated forms may be sized to have cross-sectional dimensions and geometries that generally correspond to the cross-sectional configurations of communications cabling that are typically placed in a fiber duct to interconnect electronic equipment. Selective removal of the pre-perforated forms establish associated passageways through the body for receiving the appropriately sized cabling therethrough. This facilitates the maintenance of a barrier to gasses and other substances escaping through the duct, while still allowing cabling to freely pass through the duct.
REFERENCES:
patent: 4249353 (1981-02-01), Berry
patent: 4729916 (1988-03-01), Feldman
patent: 4919372 (1990-04-01), Twist et al.
patent: 5067676 (1991-11-01), Beele
patent: 6530187 (2003-03-01), Shimizu
patent: 402256752 (1990-10-01), None
http://www.thefreedictionary.com/perforated.
One page brochure of Hilti USA, Schaan, Principality of Liechtenstein, “FS 657 Fire Block”, copyright 2001-2005, taken from website http://www.us.hilti.com, printed on Apr. 1, 2005.
Edwards Mark Stephen
Peck Steve D.
Figueroa Adriana
Glessner Brian
Sprint Communications Company L.P.
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