Patent ID: 7367874
Filing Date: 2008-05-06
Classification: A61C,B24B,B24D,Y10S

Abstract:
1. A mandrel functioning as a clamping element for a working disk, the mandrel comprising: a shaft for affixing the mandrel to a retainer or clamping device of an instrument, said shaft having an end with a clamping surface and an opening formed therein; a detachable fixing element for affixing and clamping the working disk in a detachable manner between said clamping surface and said detachable fixing element, said detachable fixing element being a pin with a pin shaft and a pin head extending from said pin shaft, said pin shaft being disposable in said opening; a mechanism for anchoring said pin or said pin shaft of said pin in said opening in a detachable manner; and a retainer disposed on said clamping surface, said retainer attaching the working disk for preventing the working disk from rotating; said pin having a further clamping surface for engaging the working disk; said clamping surface of said shaft or said further clamping surface of said pin being formed by at least one element made from a permanently elastic material; said mechanism being a protrusion extending into said opening; said pin shaft having a groove formed therein, said groove being open at one end for receiving said protrusion formed in said opening; said pin having a recess formed therein defining a tappet with a flattened surface running from one end of said pin for inserting said protrusion into said groove; and said tappet forming an angular surface on one side for said protrusion.