Patents by Inventor Angus D. Duncan

Angus D. Duncan 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).

  • Apparatus for cutting or scoring sheet material
    Patent number: 4220066
    Abstract: Glass scoring apparatus comprises a cutting tool, means for applying a cutting load to the cutting tool when the tool engages a glass surface to be scored, and a damping member arranged to absorb energy developed by reaction forces opposing the cutting load when the tool is moved into contact with the glass. The damping member has a loss factor tan .delta. which is high enough to prevent any substantial transient reduction in the cutting load.
    Type: Grant
    Filed: August 2, 1978
    Date of Patent: September 2, 1980
    Assignee: Pilkington Brothers Limited
    Inventors: Brian Hargreaves, Angus D. Duncan