Patent ID: 8042437
Filing Date: 2011-10-25
Classification: B23B,B23C,Y10T

Abstract:
1. A tool structure, comprising: a longitudinal axis; a first part having an end section with a cross section being symmetrical perpendicularly to said longitudinal axis and generally oval with respect to a first axis of symmetry in a direction of a maximum height and a second axis of symmetry in a direction of a maximum width, said maximum height being greater than said maximum width; a second part having a recess formed therein for accommodating said end section via mutual contact surfaces of said first and second parts; and at least one clamping element mutually clamping said first and second parts said mutual contact surfaces, with or without an inclusion of a contact surface of said clamping element, are restricted, as viewed in cross section, to in each case four spaced-apart surface sections running approximately in a direction of said longitudinal axis and disposed symmetrically with respect to a circumference of said end section such that a center point of a straight connecting line of starting and end points of a respective surface section is at a normal distance b