Jack for trailer
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 18, 2014
Grant Date -
Apr 11, 2013
app pub date -
Oct 11, 2011
filing date -
Oct 11, 2011
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A jack includes an outer tube, an inner tube and a lifting device. The outer tube has a positioning member and a driving rod connected thereto. The positioning member is positioned by an object and the driving rod is driven by a crank. The inner tube is located in the outer tube and the lifting device is located on the top of the inner tube so as to lift the outer tube. The positioning member is located on the top of the outer tube and the driving rod is located below the positioning member. The positioning member is positioned by a pivotal device which pivots the positioning member to a desired angle and positions the positioning member.
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