Vehicle lifting platform attachment

Claim 1

A lifting platform attachment for motor vehicle lifting platforms or drive-on pits with driving tracks, comprising: a lifting device mounted on each driving track and adapted for fitting an existing equipment, each lifting device comprising a scissors support with two parallel pairs of scissors which are not acted on directly by a lifting means, a support plate supported by the scissors support, and at least one air spring bellows, being the only mechanical lifting means and which upon deflation permits substantially complete collapse of the lifting device, arranged beneath the support plate, the scissors support and the air spring bellows being mounted on a base plate and said support plate and said base plate form the top and bottom, respectively, sealing plates for the air spring bellows so that the lifting device has a low profile when collapsed to permit a motor vehicle this is to be lifted to drive thereover, and a locking mechanism for the scissors support comprised of a support strut arranged between the two parallel pairs of scissors and a stepped wedge supporting the support strut, wherein during the lifting movement of the air spring bellows, the stepped wedge is pushed under the support strut by means of a piston and cylinder drive whereby steps on the wedge act as a support for the strut to prevent collapse of the lifting platform.