Patents by Inventor John T. Janeczko

John T. Janeczko has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Power drawfinger system for machine tool spindle
    Patent number: 4303360
    Abstract: A power drawfinger system for selectively locking and releasing a toolholder or arbor in the socket of a power driven machine tool spindle. The system includes a collet device actuated by a power drawbolt using hydraulic means for expanding said device and a resilient member for contracting same to disengage or engage the toolholder. The collet device and drawbar mechanisms are constructed to be fail safe in event of breakage of the collet or loss of power.
    Type: Grant
    Filed: February 29, 1980
    Date of Patent: December 1, 1981
    Assignee: Giddings & Lewis, Inc.
    Inventors: Donald J. Cayen, John T. Janeczko