Patent ID: 6582176
Filing Date: 2003-06-24
Classification: B60P

Abstract:
A change-over support for moving a load between low and high positions, comprising:at least a first strut comprising a first elongated member one end of which is pivotally supported in a plane disposed substantially in the low position, a second elongate member connected at one end to a second end of the first elongated member for limited pivotal movement in a predetermined direction and a third elongated member connected at one end to a second end of the second elongate member for limited pivotal movement in the predetermined direction; means at the connection between the second and third elongated members for supporting the load; and means for connecting a second end of the third elongate member to means for exerting thereon a tractive force for pivoting the first, second and third elongate members in the predetermined direction whereby the first, second and third elongated member comprise a force arm and the first and second elongate members comprise a load arm and the ratio of force arm to load arm diminishes during the movement in the predetermined direction.