Patent ID: 6761248
Filing Date: 2004-07-13
Classification: B66F

Abstract:
A variable height device, comprising:a) a platform and a base; b) a lifting mechanism provided for raising the platform upwardly away from the base; c) the lifting mechanism including a scissors lift located between the platform and the base; d) the scissors lift including an upper arm and a pivotably attached lower arm, the upper and lower arms being attached at a pivot connection; e) a push arm provided on the lifting mechanism; f) the push arm engaging the scissors lift for raising the platform; g) the push arm having a lower end and an upper end, the lower end being pivotably attached to the base, and the upper end being pivotably attached at an upper push arm pivot, the upper push arm pivot being located adjacent the pivot connection of the scissors lift; and h) the upper push arm pivot being vertically offset from the pivot connection of the scissors lift, the upper push arm pivot being located for substantially reducing vibration of the variable height device when the scissors lift is raised by the push arm.