Scissor jack
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Apr 21, 1987
Grant Date -
N/A
app pub date -
Feb 25, 1985
filing date -
Feb 25, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A jack is provided for use with a lifting device having two parallel support platforms. The jack has base and top elements, and a scissor mechanism between them. At least one air piston and cylinder assembly actuates the scissor mechanism. To ensure that the jack can be freely moved along the length of a lifting device, a plurality of horizontal rollers and a plurality of vertical rollers are provided. The horizontal rollers are mounted by spring biasing means, so that, when a vehicle weight is taken by the jack, the spring means is compressed. The jack then contacts the support platforms, to prevent further movement of it. The jack can also include two vertical air piston and cylinder assemblies, which are connected on either side of the scissor mechanism.
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