Height adjustable apparatus with control arm
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United States of America Patent
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Dec 4, 2012
Grant Date -
N/A
app pub date -
Sep 8, 2008
filing date -
Jun 30, 2005
priority date (Note) -
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status (Latency Note)
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Abstract
The present invention has a deck supported by at least one parallelogram. When two parallelograms are used, the first has first and second levers and a drag link, and the second has third and fourth levers and a second drag link. Each parallelogram is raised and collapsed with an actuator. The first lever and the fourth lever each have an arm with an interface. The actuators are pivotally and movably connected to the interfaces and pivotally connected to the drag links. The location of the actuators relative the interfaces is controlled with control arms. The control arms have ends that are connected to the respective drag link and each rotates at an offset circular path about a central point of the adjacent levers.
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