1984-01-09
1985-07-30
Joyce, Harold
98 20, 98 4201, E06B 702
Patent
active
045314551
ABSTRACT:
A ventilator or extractor unit is disclosed for mounting at an aperture in a wall, duct, window pane or the like. The unit includes a first approximately annular part which in use is secured to the window pane or the like with a central aperture in said annular part in register with the aperture in the window pane or the like. A further generally annular part is spaced from the first-mentioned annular part on the side of the first-mentioned part remote from the window pane or the like, the further annular part being supported from the first-mentioned part by four pillars at the peripheries of the annular parts. A second part in the form of a circular lens, is supported centrally, approximately midway between the annular parts. Due to the shape of the lens, air currents passing on the outside of the window pane, parallel therewith and passing between the annular parts and around the lens will, by the Venturi effect, produce a depression in the region of the apertures in the first-mentioned annular part and the window pane which will draw fumes etc. from the space on the window out through said apertures.
Harrison David B.
Joyce Harold
Turbo Ventana Limited
LandOfFree
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