| 摘要 |
An improved wall ventilator for use in building constructions comprising a housing having peripheral wall members defining a ventilating passageway therethrough, a supporting lattice extending across the passageway and defining a narrow elongate slot, a manually adjustable louver section having a plurality of panels extending in side by side relation across the passageway behind the support lattice and being interconnected for pivotal movement about adjacent side edges of each other, hinge means pivotally interconnecting an end one of the plurality of panels to an adjacent side wall portion of the housing, and a manually engageable control knob attached to the opposite end one of the plurality of panels extending through the lattice slot and slideable therealong to fold and unfold the panels upon themselves about their interconnected side edges to open and close the ventilating passageway of the housing. Preferably, the housing is unitarily formed of plastic material, and the louver section is correspondingly unitarily formed of plastic material, with the panels thereof being pivotally interconnected by one or more foldable plastic webs of material unitarily formed with the panels.
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