US Patent 7465260 Weightlifting bench with synchronized backrest and seat

A weight bench system an adjustable seat assembly and an adjustable backrest assembly linkage which assures that a seat cushion frame remains in a comfortable position relative to a backrest cushion frame at all back angle positions. A backrest adjustment pin assembly provides for adjustment of the backrest assembly and the seat assembly. The backrest adjustment pin assembly may be operated either by directly retracting a lock pin or remotely by actuating a remote handle assembly.