US PATENT SUBCLASS 454 / 243
.~.~ Sleeved vent for ceiling, wall, or floor (e.g., thimble)

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


454 /   HD   VENTILATION

237  DF  HAVING BOTH INLET AND OUTLET AIRWAYS {6}
241  DF  .~ Including unitary inlet and outlet housing {4}
243.~.~ Sleeved vent for ceiling, wall, or floor (e.g., thimble) {1}
244  DF  .~.~.~> With air pump means for both inlet and outlet airways

DEFINITION

Classification: 454/243

Sleeved vent for ceiling, wall, or floor (i.e., thimble):

(under subclass 241) Subject matter wherein the single structure comprises a casing which acts alone and is inserted in an interior top, side, or bottom structural barrier of the (ventilated) space to guide air separately and in opposite directions between adjacent, unconfined locations on opposite sides of the barrier.

(1) Note. An air distributing register with return vent which works in conjunction with a 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. A bank-vault ventilator thimble is included in this subclass.