US PATENT SUBCLASS 454 / 218
.~.~.~.~ Including collapsible or flexible, perpendicular side wall

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}
217  DF  .~.~.~ Having adjustable angle or swingable mounting {1}
218.~.~.~.~ Including collapsible or flexible, perpendicular side wall

DEFINITION

Classification: 454/218

Including collapsible or flexible, perpendicular side wall:

(under subclass 217) Subject matter comprising a partitioning surface at an end of the air guiding surface which (1) has one edge which is connected to the air guiding surface for movement therewith and an opposite edge which is stationary and (2) lies generally at a right angle to the air guiding surface.

(1) Note. The partitioning surface usually is constructed of a flexible material or of plural, relatively moveable strips.

(2) Note. The side wall usually prevents air from bypassing the guiding surface and not being deflected upwardly.