US 6,523,647 B2 · Elevating platform assembly

Abstract

An elevating platform assembly includes a generally vertical mast having a generally vertical rack mounted thereon. A first trolley is coupled to the mast and is moveable therealong. A drive mechanism is carried by the first trolley and includes at least one pinion in mating engagement with the rack. An elongated elevating platform extends from the mast and has a second trolley mounted adjacent one end thereof. The second trolley couples the elevating platform to the mast and is moveable along the mast. The first trolley is coupled to at least one of the second trolley and elevating platform in a manner to maintain alignment of the at least one pinion and rack when loads are placed on the elevating platform that create moments at the mast.

Claims18

Dependent claims

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.

2 more elements

Dependencies are inferred from the claim text.

Elevating platform assembly

Life of this patent

Elevating platform assembly

Life of this patent

Abstract

Claims18