Patent ID: 8226075

Claim:
A claw jaw for a machine vise which secures a work-piece for machining comprising: a rectangular slab having a front and a rear surface, and flat top, bottom, left and right surfaces, a work-piece gripper, the work-piece gripper comprising, a step comprising a step floor and step back relief, the step located at the intersection of the front or rear surfaces and the top or bottom surfaces, respectively, and an array of teeth located on the step back relief, the array aligned parallel to the plane of the top surface, the array comprising a multiplicity of pyramid-shaped teeth arranged in a line, each tooth in said array comprising a pyramid with bottom, lower, upper, left, and right surfaces, the bottom surface of the tooth attached to the step back relief, and the surface area of the upper surface of the tooth smaller than or equal to the surface area of the lower surface of the tooth, and means for reversibly attaching the claw jaw to a fixed jaw station or a moveable jaw section of a machine vise, wherein the angle between the plane of the upper surface of the tooth is at an angle of approximately 15° to the plane of the top surface of the claw jaw, and the angle between the plane of the lower side of the tooth is at an angle of approximately 45° to the plane of the step back relief.