US PATENT SUBCLASS 454 / 219-- .~.~.~ Having readily moveable air regulating means

US PATENT SUBCLASS 454 / 219
.~.~.~ Having readily moveable air regulating means

Current as of: June, 1999
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454 /	HD	VENTILATION

196	DF	MEANS COMBINED WITH WINDOW {12}
214	DF	.~ Having air passage between sill and bottom of sash {5}
216	DF	.~.~ Including wall for upwardly deflecting inlet air {3}
219		.~.~.~ Having readily moveable air regulating means

DEFINITION

Classification: 454/219

Having readily moveable air regulating means:

(under subclass 217) Subject matter comprising easily shiftable means to increase or decrease flow of the air.

(1) Note. A shiftable internal body such as a damper is included in this subclass.

(2) Note. Readily moveable air regulating means does not include a mere sliding or pivoting window frame or sash.

SEE OR SEARCH THIS CLASS, SUBCLASS:

217, for an air passage between a window sill and sash bottom including an adjustable angle wall for upwardly deflecting inlet air.