Patent ID: 7806209

Claim:
An undercarriage arrangement comprising: a first track roller assembly including; a roller frame; a drive sprocket; at least one idler assembly rotatably connected to said roller frame; a carrier roller rotatably connected to an upper portion of said roller frame; a track chain entrained around said drive sprocket, said at least one idler, and said carrier roller, said track chain defining a catenary hang; a second track roller assembly including; a roller frame; a drive sprocket; at least one idler assembly rotatably connected to said roller frame; a carrier roller rotatably connected to an upper portion of said roller frame; a track chain entrained around said drive sprocket, said at least one idler, and said carrier roller, said track chain defining a catenary hang; and wherein said catenary hang of said track chain of said first track roller assembly being different than said catenary hang of said track chain of said second roller assembly so that during operation the catenary movement of said track chain of said first track roller assembly is placed out of phase with the catenary movement of said track chain of said second track roller assembly thereby canceling the vibration effects of the catenary movement.