Patents by Inventor Richard W. Hirst

Richard W. Hirst 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).

  • Support structure for plasma arc cutting torch shield
    Patent number: 4379962
    Abstract: A shield for a plasma arc torch is carried by a support mounted so as to be easily disassembled, to permit inspection and/or servicing of components surrounded by the shield by merely lifting up on the support to disengage a pair of projections at the opposite ends thereof from a pair of receptacles fixed to the frame of the machine which supports the torch.
    Type: Grant
    Filed: April 30, 1981
    Date of Patent: April 12, 1983
    Assignee: Deere & Company
    Inventor: Richard W. Hirst