Firewall damper for sleeves having data transmission lines

Details Firewall damper for sleeves having data transmission lines Firewall damper for sleeves having data transmission lines

2005-08-02

2005-08-02

Dinkins, Anthony (Department: 2831)

Electricity: conductors and insulators

Conduits, cables or conductors

Single duct conduits

C174S019000, C174S050510, C174S050550, C174S068100, C174S068300, C174S07000A, C248S074100, C248S076000, C248S635000, C248S562000, C248S603000

Reexamination Certificate

active

06924432

ABSTRACT:
A firewall damper fitting for data transmission lines having a damper body and a vertically sliding cover plate. The cover plate and the damper body having protruding lip portions which allow removable access to data lines while providing an effective damper which retards heat and fire through a sleeve without damaging the data transmission lines.

REFERENCES:
patent: 2431154 (1947-11-01), Wikstrom
patent: 4061344 (1977-12-01), Bradley et al.
patent: 4249353 (1981-02-01), Berry
patent: 4259542 (1981-03-01), Tehan et al.
patent: 4432465 (1984-02-01), Wuertz
patent: 5079389 (1992-01-01), Nelson
patent: 5215281 (1993-06-01), Sherman
patent: 5408740 (1995-04-01), Dee
patent: 5594202 (1997-01-01), Tobias

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