Patent ID: 7237667
Filing Date: 2007-07-03
Classification: B60P,B65G,B66F

Abstract:
1. A roller device ( 10 ) for displacing a load ( 1 ) in an essentially horizontal plane comprising at least one essentially horizontal table ( 21 ) to which roller elements ( 23 , 24 ) are attached, at least one rack ( 31 ) covering said table ( 21 ) equipped with openings ( 32 , 33 ) located opposite said roller elements ( 23 , 24 ), said rack ( 31 ) defining a plane contact surface (S) for supporting said load when the load is static and said roller elements ( 23 , 24 ) being located in a plane essentially parallel to said surface (S) and able to support said load when the load is moving, an actuating means ( 40 ) being associated with at least one of the rack ( 31 ) and the table ( 21 ) to be movable relative to another of the rack ( 31 ) and the table ( 21 ) between at least a lower position and an upper position wherein the load is supported either by the rack ( 31 ) or by the table ( 21 ), said actuating means ( 40 ) displaces one of the rack ( 31 ) and the table ( 21 ) at least in a horizontal translation (Th), and said openings ( 32 , 33 ) of the rack ( 31 ) have a shape compatible with a shape of the roller element ( 23 , 24 ) to form lifting ramps so as to cause the one of the rack ( 31 ) and the table ( 21 ) to move in vertical displacement (Tv) simultaneously with the horizontal displacement (Th).