Gate opening device
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United States of America Patent
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-
Sep 24, 1991
Grant Date -
N/A
app pub date -
Mar 30, 1989
filing date -
Mar 30, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An automatic gate opening device is provided which simultaneously lifts and opens the gate. A drive mechanism forces the gate upward, while a roller bearing following a helical slot in a tube causes rotation of the gate. Hinges are provided which allow simultaneous rotational and linear displacement of the gate.
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