Lifting apparatus having a toggle lever mechanism
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United States of America Patent
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Apr 4, 2017
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N/A
app pub date -
Jun 25, 2013
filing date -
Aug 20, 2012
priority date (Note) -
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Abstract
A lifting apparatus includes a lifting part that can be moved in linear direction between a rest position and a working position. At least one drive device is disposed for moving the lifting part. Each drive device includes a toggle lever mechanism, having a first toggle supported pivotally on the lifting part and a second toggle supported on a base part. A positioning device prespecifies the position of the lifting part in lifting direction and in a direction transverse to lifting direction in working position. To do so, said toggle preferably has a stop surface against which the lifting part is pushed into working position by the at least one drive device. In this working position, the toggle joint angle α of the toggle lever mechanism is smaller than 180° so that the two toggles and are outside the extended position.
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