Patents by Inventor Benjamin W. Hubbard

Benjamin W. Hubbard 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).

  • Reciprocating tool spindle and tool changer mechanism operable during spindle backstroke
    Patent number: 4807353
    Abstract: A tool spindle in movable is a forward stroke toward a workpart and in a rearward stroke. A sensing device senses whether a tool chucked on the forward end of the spindle is damaged. A tool changer mechanism enters the rear of the spindle as the spindle moves rearwardly and inserts a replacement tool for the damaged tool in response to a signal from the sensing device indicating the tool is damaged. The next forward stroke of the spindle machines the workpart with the replacement tool. A replacement tool magazine and tool transfer mechanism are carried on a common slide with the spindle and are movable relative to the tool changer mechanism to transfer a replacement tool from the magazine to the tool changer mechanism.
    Type: Grant
    Filed: March 28, 1988
    Date of Patent: February 28, 1989
    Assignee: R & B Machine Tool Company
    Inventors: James R. Corson, Benjamin W. Hubbard, Veryl F. Steinaway