Spring-rodless hingeless ventilator

Details Spring-rodless hingeless ventilator Spring-rodless hingeless ventilator

1983-02-28

1984-06-05

Makay, Albert J.

Closure fasteners

Clamps

Portable

16231, 49382, 292 23, 292262, 308203, B60H 126

Patent

active

044521294

ABSTRACT:
A hingeless ventilator having a frame attachable to a wall of a compartment about an opening therein, a closure member swingable against a side of the frame for opening and closing the opening, guide members fixed to and instanding from an opposite side of the frame beyond opposite ends of the wall opening, and arms fixed to the closure member adjacent opposite ends thereof and instanding therefrom through the wall opening and a screen plate integral with the frame and screening the opening, in which the arms mount on oppositely projecting stub axles a pair of rollers each riding on a guide surface of the adjoining guide member and having for engaging that surface an elastomeric collar, and compression of the collars of the pair of rollers against the guide surfaces provides through the arms of the closure member the tensile force for holding the closure member against and in any selected position relative to the frame when swung to that position by a handle connecting and reinforcing the end portions of the arms.

REFERENCES:
patent: 1845417 (1932-02-01), Ingham
patent: 3046865 (1962-07-01), Kelly
patent: 3492055 (1970-01-01), Frankland
patent: 3839950 (1974-10-01), Kelly et al.

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