Patents by Inventor Dennis Frederick Walton

Dennis Frederick Walton 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).

  • Ball nut and screw assembly
    Patent number: 6898994
    Abstract: A ballscrew and ball nut assembly with complimentary threads providing a ball raceway having a ball re-circulation path within the screwshaft of the ballscrew provided on the peripheral surface of a screwshaft insert and including end passages which communicate with the raceway and a non-helical mid-passage connecting said end passages.
    Type: Grant
    Filed: March 7, 2003
    Date of Patent: May 31, 2005
    Assignee: Thomson Saginaw Ball Screw Company, LLC
    Inventor: Dennis Frederick Walton
  • Ball nut and screw assembly
    Publication number: 20030145673
    Abstract: A ballscrew and ball nut assembly with complimentary threads providing a ball raceway having a ball re-circulation path within the screwshaft of the ballscrew provided on the peripheral surface of a screwshaft insert and including end passages which communicate with the raceway and a non-helical mid-passage connecting said end passages.
    Type: Application
    Filed: March 7, 2003
    Publication date: August 7, 2003
    Inventor: Dennis Frederick Walton
  • Self-lubricating ballscrew
    Patent number: 6601676
    Abstract: A self-lubricating ballscrew has a screwshaft and a ballnut surrounding the screwshaft and provided with a re-circulating path for a plurality of balls which roll between the ballnut and the screwshaft when the ballscrew is in use. Lubrication means are in contact with the helical groove of the screwshaft to provide lubrication therefor. The self-lubricating means comprises a lubricant impregnated solid having an elongate portion which follows the path of and is received in the helical groove of the screwshaft. The cross-section of that portion is different from that of the said groove, so that the contact region between the said portion and the said groove coincides with the lines of contact between the balls and the screwshaft. The deposit of lubricant is thereby concentrated on those lines.
    Type: Grant
    Filed: December 20, 2000
    Date of Patent: August 5, 2003
    Assignee: Thomson Saginaw Ball Screw Company, LLC
    Inventor: Dennis Frederick Walton
  • Ballscrew
    Publication number: 20010020400
    Abstract: A ballscrew having a ball re-circulation path within the screwshaft of the ballscrew.
    Type: Application
    Filed: March 2, 2001
    Publication date: September 13, 2001
    Inventor: Dennis Frederick Walton
  • Self-lubricating ballscrew
    Publication number: 20010018850
    Abstract: A self-lubricating ballscrew has a screwshaft and a ballnut surrounding the screwshaft and provided with a re-circulating path for a plurality of balls which roll between the ballnut and the screwshaft when the ballscrew is in use. Lubrication means are in contact with the helical groove of the screwshaft to provide lubrication therefor. The self-lubricating means comprises a lubricant impregnated solid having an elongate portion which follows the path of and is received in the helical groove of the screwshaft. The cross-section of that portion is different from that of the said groove, so that the contact region between the said portion and the said groove coincides with the lines of contact between the balls and the screwshaft. The deposit of lubricant is thereby concentrated on those lines.
    Type: Application
    Filed: December 20, 2000
    Publication date: September 6, 2001
    Inventor: Dennis Frederick Walton