Device for sealing ducts of electric and telephone lines

Details Device for sealing ducts of electric and telephone lines Device for sealing ducts of electric and telephone lines

2006-01-03

2006-01-03

Estrada, Angel R. (Department: 2831)

Electricity: conductors and insulators

Conduits, cables or conductors

C174S0720TR, C174S0210JR, C285S095000, C277S602000

Reexamination Certificate

active

06982382

ABSTRACT:
The present invention comprises a rectangular sheet with folding lines and a perimetric strip that facilitates adhering or welding thereof, and the forming of a bag-type closed compartment, inside of which there is a small tank loaded with a pressurized gas. The outlet hole of the tank can be opened from the outside, in order to let the gas escape and cause gradual and slow inflation of the compartment formed by the folded sheet, once it has been arranged around the main at the of a tube or conduit, thereby adhering to the walls of both elements during inflation.

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patent: 5413136 (1995-05-01), Prescott
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patent: 5901962 (1999-05-01), Wambeke
patent: 6361054 (2002-03-01), Denker et al.
patent: 6581938 (2003-06-01), McKenrick
patent: 1 217 288 (2002-06-01), None
patent: 2168770 (2002-06-01), None
patent: 2617572 (1989-06-01), None

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