Patents by Inventor Paul T. Harkness

Paul T. Harkness 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).

  • Machine tools
    Patent number: 5388934
    Abstract: A drive shaft 40 extends through a ram 42. The ram can be driven up and down by rotating a screw shaft 35. The ram carries with it a motor 44 which drives a pulley 36 connected to the top of the shaft 40 for rotating that shaft 40. The ram 42 can be rotated upon operation of a motor 60 which drives a worm 62 to engage a worm wheel 64 which surrounds the ram 42 and is fast therewith.
    Type: Grant
    Filed: May 10, 1993
    Date of Patent: February 14, 1995
    Assignee: William Asquith (1981) Limited
    Inventors: Paul T. Harkness, Michael J. Haspel, Bernard A. Squires