Electromechanical door operator
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United States of America Patent
Stats
-
Sep 2, 1980
Grant Date -
N/A
app pub date -
May 15, 1978
filing date -
May 15, 1978
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A door operator with a reciprocable rack gear adapted to be actuated in opposite directions by an electric motor driven screw and a coaxial helical compression spring for rotating a drive gear of a door operating spindle in opposite directions for opening and closing a swinging door, the rack gear forming part of a spindle operator having lateral bearings engageable with the ends of the spindle and adapted to be mounted in either of two 180.degree. angularly spaced positions about the axis of the drive screw for rotating the spindle in opposite directions, and the coaxial compression spring being operable via the rack gear for biasing the spindle in both directions to an intermediate position thereof.
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