Spring rod hingeless ventilator

Details Spring rod hingeless ventilator Spring rod hingeless ventilator

1990-06-07

1991-06-04

Joyce, Harold

B60H 126

Patent

active

050204254

ABSTRACT:
A hingeless ventilator having a frame attachable to a wall of a compartment about an aperture therein, an opening in the frame alignable with the aperture, 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 opening, and a spring rod mounting on opposite ends composite rollers riding on the guide members and connected under tension to the closure member for selectively positioning the closure member relative to the frame, the roller assemblies each having an antifriction bushing journalled on the spring rod and in and bonded to an elastomeric collar engaging an adjoining guide member.

REFERENCES:
patent: 3102464 (1963-09-01), Kelly et al.
patent: 3358576 (1967-12-01), Kelly et al.
patent: 3366027 (1968-01-01), Kelly
patent: 3372631 (1968-03-01), Kelly
patent: 3760707 (1973-09-01), Kelly
patent: 3839950 (1974-10-01), Kelly et al.
patent: 4452129 (1984-06-01), Kelly et al.

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