Air duct expander

Details Air duct expander Air duct expander

2006-04-04

2006-04-04

Boles, Derek S. (Department: 3749)

Ventilation

Having inlet airway

Including specific air distributor

C454S903000

Reexamination Certificate

active

07022011

ABSTRACT:
An apparatus for directing air away from a register grill includes a shroud covering that is applied over the grill and a flexible conduit that is attached over an opening provided in the shroud. The flexible conduit is used to discharge air away from the grill where desired. A plurality of flexible conduits may be used with each grill. If desired, a detachable cover is used to obstruct air flow out of a discharge end of each flexible conduit. According to a modification, a section of rigid conduit is used in place of the flexible conduit. An intermediate section that is adapted to flex is attached to the shroud and disposed intermediate the grill and the rigid conduit to allow directional placement of the rigid conduit, where desired. The shroud is attached to the grill by screw fasteners, adhesive, magnetic means, or otherwise, as desired or it may be formed as an integral part of a replacement type of grill.

REFERENCES:
patent: 3359883 (1967-12-01), Murphy
patent: 4481871 (1984-11-01), Efstratis
patent: 4628799 (1986-12-01), Lang et al.
patent: 4850266 (1989-07-01), Bennett
patent: 4967646 (1990-11-01), Brown
patent: 5044259 (1991-09-01), Catan et al.
patent: 5095942 (1992-03-01), Murphy
patent: 6131645 (2000-10-01), Barr

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