DEVICE FOR LIFTING AND LOWERING
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United States of America Patent
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Issued Date -
Jan 17, 2013
app pub date -
Feb 4, 2011
filing date -
Feb 5, 2010
priority date (Note) -
Abandoned
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Abstract
Lifting/lowering apparatus comprises a lower frame (1), a horizontal upper frame (7) supported by which a plane is adjusted and comprises a lifting mechanism adjusted between the mentioned lower frame and upper frame with the help of which lifting mechanism the upper frame (7) can be lifted and lowered in relation to the lower frame (1) and that the lifting mechanism comprises adjacent pillars (2, 3, 4), each pillar is formed of cylinder parts (2-4) that can be moved telescopically in relation to each other which cylinder parts are attached to each other by threads such that the rotation of the parts (2-4) in relation to each other changes the height of the pillars. In order to reduce the construction weight the cylinder parts (2-4) are made of plastic and in order to improve the receiving of the sideway loadings the inner diameter of the cylinder part (4) having the smallest diameter is over 200 mm.
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