Patents Assigned to Davenport Machine Tool Co., Inc.
  • Chuck-closing mechanism for automatic screw machine
    Patent number: 4014558
    Abstract: When the conventional feed yoke is moved forwardly by the conventional mechanism of an automatic screw machine, an internal conical surface on a ball sleeve, which is moved forwardly by the yoke, operating through balls forces the chuck-closing sleeve forward to close the split collet to grip and hold the bar stock firmly during a machining operation.
    Type: Grant
    Filed: March 8, 1976
    Date of Patent: March 29, 1977
    Assignee: Davenport Machine Tool Co., Inc.
    Inventor: Earl W. Brinkman