Patents by Inventor John W. Dreger

John W. Dreger 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).

  • Retainer subassembly for and in combination with a master link for a chain
    Patent number: 6390943
    Abstract: A retainer subassembly for a master link of a chain includes a cover plate, a pair of snap rings and a strap plate. The cover plate includes a pair of stepped recesses terminating in openings adjacent the outer face of the cover plate for receiving the spaced pins of a master link. Snap rings having radially inwardly extending and axially outwardly inclined tangs are disposed in the recesses. A strap plate overlies the inside face of the cover plate. To apply the retainer subassembly to the master link, the holes through the retainer subassembly are aligned with the pins and the retainer subassembly is pushed onto the pins. Once the flanges of the snap rings pass the ends of the pins, the flanges resiliently snap into the annular grooves of the pins retaining the retainer subassembly on the master link.
    Type: Grant
    Filed: May 25, 2000
    Date of Patent: May 21, 2002
    Inventors: Kurt W. Dreger, John W. Dreger, Lornell Grayson