Patents by Inventor Thomas H. Hopkins

Thomas H. Hopkins 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).

  • Trigger release clamp
    Patent number: 4444379
    Abstract: A welding fixture mounts a self-clearing workpiece clamp having an arm that is pivotally mounted on the fixture and carries over-center toggle linkage for a clamp jaw. A trigger connected to the linkage is engaged by a moving welding head for releasing the clamp jaw, whereupon a spring swings the clamp arm clear of the welding head.
    Type: Grant
    Filed: January 11, 1982
    Date of Patent: April 24, 1984
    Assignee: FMC Corporation
    Inventor: Thomas H. Hopkins