Patents Assigned to Fadal Engineering Co., Inc.
  • Draw bar mechanism
    Patent number: 5022278
    Abstract: In a wedge ring mechanism for providing a collet clamping force in a machine tool spindle, a sleeve member retains a plurality of steel balls. A mechanical advantage is realized as the balls are wedged between obliquely inclined surfaces. The sleeve member is provided with a plurality of cylindrical passageways so that positive control over the motion of the balls is maintained at all times during both engagement and release of the collet clamping force, thereby obviating the need to pinch out the balls during release.
    Type: Grant
    Filed: March 27, 1990
    Date of Patent: June 11, 1991
    Assignee: Fadal Engineering Co., Inc.
    Inventor: David E. DeCaussin