Electricity: conductors and insulators – Insulators – Through wall or plate
Patent
1997-06-20
2000-04-18
Kincaid, Kristine
Electricity: conductors and insulators
Insulators
Through wall or plate
16 21, H01B 1726
Patent
active
060517956
ABSTRACT:
A grommet disposed in a panel hole to prevent a fire from spreading from one panel side to the other has a pair of flaps defining a socket for nesting in the panel hole in a closely fit relationship. Preferably one flap is longer than the other and is disposed against the panel surface. The grommet has an inner peripheral surface, preferably annular, defining a hollow central opening with a radius less than that of the cable so as to receive and retain the cable even with changes in cable positioning. The grommet has a fire resistant chemical composition which becomes resiliently flattened upon the cable disposition in the grommet opening. One flap is bent toward the other with the panel withdrawn from the socket and is resiliently pressed against the panel with the panel in the socket. The grommet includes, in the section with the larger flap, a fire resistant fabric (e.g. ceramic) impregnated and coated with the fire resistant chemical composition (e.g. silicone with an approximately 55 Rockwell hardness). The chemical composition of the grommet in the section with the larger flap preferably has a higher melting temperature than the chemical composition of the other section.
REFERENCES:
patent: 2039009 (1936-04-01), Lapman et al.
patent: 2367836 (1945-01-01), Brown
patent: 4961989 (1990-10-01), Grimwood
patent: 5071143 (1991-12-01), Byerly et al.
Fisher Bruce S.
Jackson Ronald A.
Loveall Kevin D.
Cuneo Kamand
Kincaid Kristine
Roston Ellsworth R.
TA Mfg. Company
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