Patents Assigned to Master Craft Engineering, Inc.
  • Patent number: 4144732
    Abstract: An apparatus and method are provided for forming a pulley having at least two grooves from a cup-shaped metal blank having an axially extending sidewall. The blank is rotated about its longitudinal axis and is crushed between axially closing dies. As the blank is being crushed, a rough forming roll is translated radially into contact with the outer periphery of the cup and applies forming pressure at at least two axially spaced zones. A finish forming roll is radially aligned with the rough forming roll and is translated radially toward the outer periphery of the cup. The rough and finish forming rolls are carried by cam-actuated slide assemblies arranged to move the rough roll into the blank wall in advance of the finish roll in a working operation so as to partially form a pulley groove and to maintain the finish roll in the partially formed groove during an idling operation.
    Type: Grant
    Filed: November 9, 1977
    Date of Patent: March 20, 1979
    Assignee: Master Craft Engineering, Inc.
    Inventors: Gerald M. Franks, John W. Haswell
  • Patent number: D245076
    Type: Grant
    Filed: April 2, 1976
    Date of Patent: July 19, 1977
    Assignee: Master Craft Engineering, Inc.
    Inventor: John W. Haswell
  • Patent number: D247288
    Type: Grant
    Filed: April 2, 1976
    Date of Patent: February 21, 1978
    Assignee: Master Craft Engineering, Inc.
    Inventor: John W. Haswell