Safety auxiliary apparatus for automatic door assembly
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Dec 7, 1999
Grant Date -
N/A
app pub date -
Oct 28, 1997
filing date -
Oct 31, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A safety auxiliary apparatus for an automatic door assembly includes a single door or first and second doors slidable along a predetermined track for selectively opening and closing the doorway, first and second mutually confronting closure faces being defined by said first and second doors or said single door in cooperation with a brace. A casing accommodating therein a light emitting element for emitting a beam for detection of an object and a light receiving element for receiving the beam from the light emitting element is mounted in a longitudinal frame member of the doors or said brace that define respectively said closure faces, so that an optical path can be defined between said closure faces so as to extend from the light emitting element to the light receiving element.
First Claim
Family
International Classification(s)
Cited Art Landscape
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