Lifting mechanisms especially lifting platform
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 16, 1982
Grant Date -
N/A
app pub date -
Mar 7, 1980
filing date -
Mar 8, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A lifting mechanism with a lifting platform, a lifting column supporting the platform, a threaded catch rod attached to the column, and an easily workable nut mounted on the rod and surrounded by a housing forming part of the platform. The housing engages the nut through a ball bearing and spring so that the nut rotates and moves up and down with the platform during normal operation. If the platform moves downward rapidly the spring is compressed and a projection on the housing engages the nut to stop downward movement of the platform.
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