Patent ID: 7517179
Filing Date: 2009-04-14
Classification: B23B,Y10T

Abstract:
1. A holesaw mandrel assembly comprising: a mandrel having a body with a first end for coupling with a drill motor, a second end extending from said body, said second end including a thread for receiving a holesaw, the mandrel having an axis of rotation; a first member on said second end, said first member axially movable on said second end; a friction surface on said first member, said friction surface adapted for contacting a base surface on the holesaw such that the holesaw is fixed in position, said friction surface moving between a first contact and a second release position; and a mechanism on said mandrel adjacent said first member for moving said friction surface between said first and second positions, said mechanism including at least one roller, said roller providing a bearing surface in continuous contact with said first member such that as said roller moves between a first and second roller position the bearing surface provides a force directly on the first member and having at least a component in the direction of said axis of rotation, and, said friction surface moves between said contact and release positions.