SCREW JACK
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Dec 31, 2002
Grant Date -
Jan 23, 2003
app pub date -
Jul 23, 2001
filing date -
Jan 26, 2000
priority date (Note) -
Granted
status (Latency Note)
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Abstract
The present invention relates to a screw jack that has a thin metal bearing for supporting a main screw shaft of a jack body to lift the jack body high as possible so that a torque increase can be kept to a minimum. For this purpose, the metal bearing is mounted and configured to have a substantially large outer diameter, and also a small stepped sliding-surface is formed on the top or bottom surface of the metal bearing.
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