Patent ID: 6626615
Filing Date: 2003-09-30
Classification: B23B,Y10T

Abstract:
A. chuck for chucking a small bit comprising:a holding jaw comprising four holders; a jaw-position guiding body with a square hole at the front portion for positioning the holding jaw, the holding jaw being at least partially disposed within the square hole of the jaw-position guiding body; a crossing linkage for connecting the jaw-position guiding body to the holding jaw, the crossing linkage comprising a crossing head and a projection portion, the projection portion engaging with each holder of the holder jaw such that each holder moves within the jaw-position guiding body as the crossing linkage is moved relative to the jaw-position guiding body; a guiding jacket operably positioned with respect to both the crossing linkage and the jaw-position guiding body; a positioning screw nut threadably engaged with the jaw-position guiding body; a screw collar threadably engaged with the crossing linkage; and a bevel gear housing fixedly attached about the screw collar.