Linkage assembly with extruded hole member

In a seat track mechanism for horizontally moving the seat of a motor vehicle in a forward and rearward sense and for elevating the front end of the seat and elevating the rear end of the seat, the mechanism including laterally spaced apart first and second rail members stationary secured to the vehicle, a moving carriage having a track member engaged with each rail member for constraining the carriage to forward and rearward horizontal movement, means for elevating said seat, a front elevating structure operated by said elevating means for elevating the front end of the seat substantially independently of elevation of the rear end of the seat, a rear elevating structure operated by said elevating means for elevating the rear end of the seat substantially independently of any operation of the front elevating structure, a pivotal link at the front end of the seat interfacing between the front elevating structure and the seat, said link having a pivotal mounting to said carriage and to a section affixed to said seat, said link moveable with respect to said pivotal mounting on operation of the front end of the seat, and a second link at the rear end of the seat with one section of the second link affixed to the carriage and a second section spaced from said one section coupled to the rear end of the seat through a suitable connection to enable said limited rearward movement of the seat on elevation of the front end of the seat, and a torsion bar affixed to a linkage member at the respective seat end thereof, said linkage member comprising:

• a flat body portion and a flange member extending outward therefrom, the flange member having an outer peripheral surface, an opposed inner surface and a terminal surface distal to the flat body portion extending between the outer peripheral surface and the opposed inner surface, the flange member defining an aperture extending through the linkage member such that the outer surface of the torsion rod and the inner surface of the flange are in parallel facing relationship, and a weld seam, integrally attached to the terminal surface of the flange member and the outer surface of the torsion rod proximate thereto.