Patent ID: 6523647
Filing Date: 2003-02-25
Classification: B66F,E04G,Y10T

Abstract:
An elevating platform assembly comprising:a generally vertical mast having a generally vertical rack mounted thereon; a first trolley coupled to said mast and being moveable therealong; a drive mechanism carried by said first trolley, said drive mechanism including at least one pinion in mating engagement with said rack; and an elongated elevating platform extending from said mast and having a second trolley mounted adjacent one end thereof, said second trolley coupling said elevating platform to said mast and being moveable along said mast, wherein said first trolley is coupled to at least one of said second trolley and said elevating platform in a manner to maintain alignment of said at least one pinion and rack when loads are placed on said elevating platform that create moments at said mast.