Sleeved vent for ceiling, wall, or floor (e.g., thimble):
(under subclass 254) Subject matter comprising a casing which acts alone and is inserted in an interior top, side, or bottom structural barrier of the (ventilated) space to direct air from an unconfined location outside of the space to an adjacent unconfined location on an opposite side of the barrier and within the space.
(1) Note. An air distributing register which works in conjunction with an inlet duct is not included in this subclass. The adjacent air on opposite sides of the barrier must be unconfined by ducting or like structures.
(2) Note. An exterior, wall-type louver panel is not included in this and indented subclasses unless the panel guides air through a barrier directly into the ventilated space.
SEE OR SEARCH THIS CLASS, SUBCLASS:
277+, for an exterior, wall-type louver panel for a building vent.
330+, for an air distributing register box, frame, or grating which acts in conjunction with an inlet airway or duct.
SEE OR SEARCH CLASS 52, Static Structures (e.g., Buildings),
302.1, for a passage between an interior part of a building and ambient atmosphere which does not direct or control air flow into a ventilated space. See the notes in Class 52, subclass 198, and in the main portion of the definitions.
