Patent Number: 6,168,433

Title: Direct drive dental prophy angle

Abstract: A dental prophy angle adapted to be engaged with a dental handpiece having a nose cone and a low-speed rotary driver within the nose cone. The prophy angle has a proximal end adapted to releasably engage with said nose cone, and a distal end having an implement-mounting member rotatable therein. A flexible shaft extends from the nose cone through the angle to the mounting member and has a diameter which is substantially smaller than the interior wall of the prophy angle. The shaft has a coupling member with a free axial end adapted to engage the rotary driver in the nose cone to be rotated upon rotation of said driver, and an opposite captive end connected to said shaft with a shoulder surrounding said flexible shaft and facing away from said free end to confront an abutment limiting axial displacement of said coupling member within the prophy angle. The flexible shaft is a steel cable comprising a plurality of multi-stranded steel cords twisted together to form a cable and encased in a sheath of polytetrafluoroethylene.

Inventors: Hamlin; David A. (Langhorne, PA)


International Classification: A61C 17/00 (20060101); A61C 1/18 (20060101); A61C 1/08 (20060101); A61C 003/06 ()

Expiration Date: 01/02/2018