Patents by Inventor Frank E. Shaffer

Frank E. Shaffer 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).

  • Adjustable metering oil pump
    Patent number: 4597697
    Abstract: A reciprocating pump for delivering cutting fluid to the machining situs between a tool and a workpiece includes a collapsible piston which forms a substantial seal in the pump during the power stroke and then collapses during the relaxation stroke to allow the piston to reassume its initial position in preparation for the next power stroke. The pump includes an indexer and switch which maintain the pump in an operative condition, thereby delivering cutting fluid to the machining situs for a predetermined amount of displacement between the tool and workpiece prior to engagement and subsequent thereto. The indexer and switch exploit a predetermined amount of play in the switch to maintain the pump in an operative condition for the desired time.
    Type: Grant
    Filed: May 21, 1984
    Date of Patent: July 1, 1986
    Inventor: Frank E. Shaffer
  • Adjustable metering oil pump
    Patent number: 4487340
    Abstract: A reciprocating pump for delivering cutting fluid to the machining situs between a tool and a workpiece includes a collapsible piston which forms a substantial seal in the pump during the power stroke and then collapses during the relaxation stroke to allow the piston to reassume its initial position in preparation for the next power stroke. The pump includes an indexer and switch which maintain the pump in an operative condition, thereby delivering cutting fluid to the machining situs for a predetermined amount of displacement between the tool and workpiece prior to engagement and subsequent thereto. The indexer and switch exploit a predetermined amount of play in the switch to maintain the pump in an operative condition for the desired time.
    Type: Grant
    Filed: July 16, 1982
    Date of Patent: December 11, 1984
    Inventor: Frank E. Shaffer
  • Cable cutter
    Patent number: D260132
    Type: Grant
    Filed: September 22, 1978
    Date of Patent: August 11, 1981
    Inventor: Frank E. Shaffer
  • Cable or rivet cutter
    Patent number: D261477
    Type: Grant
    Filed: April 16, 1979
    Date of Patent: October 27, 1981
    Inventor: Frank E. Shaffer
  • Large headed cable cutter
    Patent number: D272707
    Type: Grant
    Filed: April 20, 1981
    Date of Patent: February 21, 1984
    Inventor: Frank E. Shaffer
  • Small headed cable cutter
    Patent number: D272984
    Type: Grant
    Filed: April 20, 1981
    Date of Patent: March 13, 1984
    Inventor: Frank E. Shaffer