Automatic door bottom

Details Automatic door bottom Automatic door bottom

1988-09-27

1990-08-14

Dorner, Kenneth J.

Movable or removable closures

Closure movement actuated retractable sealing, guiding or...

Strip movement in plane of closure

49311, 49478, E06B 720

Patent

active

049475843

ABSTRACT:
An automatic door bottom is disclosed in which a channel member has a drop bar assembly mounted therein with an adjustable length push rod connected to the drop bar for cooperation with a spring means to selectively lower and raise the drop bar in response to opening and closing the door. A pair of magnets are placed within the channel on the drop bar and in the channel for effecting movement of the drop bar to insure that the bar drops in a sizzle-like manner, with the end closest to the door hinge dropping down and lifting up, before the end away from the door hinge.

REFERENCES:
patent: 3703788 (1972-11-01), Rivers
patent: 4703586 (1987-11-01), Smith et al.

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