US Patent 7827697 Low friction folding knife

A low friction folding knife has a blade with a distal end and a tang. The tang has a slot disposed in the thickness of the tang with a roller cam extending slightly outside of the perimeter of the tang and rotatably attached within the slot. There is a safety assembly disposed within the first outer handle that has a safety stud extending through a safety slot in the first outer handle for moving the safety assembly between a safe position and a safe off position. There is an adjustable bias element disposed between the first liner and the second liner. The adjustable bias element is positioned to assist the blade in exiting the blade slot.