Threshold adjustable safety edge construction for a motor operated door
OwnerBearge Millerinventor
Life of this patent
Estimating the term…
Abstract
A safety edge switching device for a door wherein a resiliently compressible structure is enclosed by a flexible, impervious sheet covering, and the interior compartment is airtight, forming a pressurized cell, where the pressurization of the cell is user adjustable. A variation of the disclosed invention includes a twin-cell design which provides for additional control uses in safety edge switching functions. Also, a manufacturing method for construction of the invention is disclosed.
Claims3
A safety edge for a power-operated door, comprising a first elongated generally straight formation of resiliently yieldable material adapted to extend along a door edge, said formation having at least one airtight cell formed by a flexible cover conformably encasing said formation, and adapted for securement to a door;
- electrical switch actuating means within said airtight cell, said actuating means being operated upon said door closure wherein said straight formation includes:
- said switch actuating means comprising two conductive metallic strips disposed internally of said airtight cell, parallel to each other said strip, and oriented to extend along the generally straight formation;
- foam strips disposed adjacent to and between said conductive strips, said foam strip between said metallic strips is composed of intermittent grids allowing contact of said metallic strips upon door closure;
- and
- said flexible cover encasing said formation compresses inward upon door closure, displacing at least one of said metallic strips to cause switch actuation.
Dependencies are inferred from the claim text.