Temperature-responsive automatic ventilator

Claim 1

An improved foundation ventilator assembly comprising: (a) a housing, said housing including side walls, a top wall and a bottom wall defining an air passageway therethrough; (b) a collar associated with said housing, said collar having a first axially extending section with respect to said passageway and a second transversely extending section with respect to said passageway, at least one of said housing and said collar defining mounting means receiving openings therein, said openings including concentric portions of different diameter, said larger diameter portions being outside of said small diameter portions with respect to said air passageway, (c) shutter means secured within said air passageway of said housing for pivotal movement thereabout, whereby when said shutter means are disposed transverse to a longitudinal axis through said passageway said passageway is closed and when disposed axial to said axis said passageway is open; (d) means associated with said shutter means for pivoting same; and (e) mounting means receivable in said mounting means receiving openings and adapted for manipulation to secure a portion of same within said foundation in the absence of predrilled openings therein, said mounting means including a threaded element having a pressure plate threadably received thereabout, said pressure plate being receivable in said large diameter portions of said openings and having means associated therewith to preclude rotational movement of same, whereby said mounting means received in said openings may be rotated for movement into said foundation with pressure produced thereby being absorbed by said pressure plates and said assembly.