Patents by Inventor Michael L. Ernst

Michael L. Ernst 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).

  • Patent number: 7340783
    Abstract: An air plunger is described. The air plunger comprises an upper barrel and a lower barrel slidably received by the upper barrel. An air seal is fixed to the lower barrel and slidably engages with the upper barrel. A nozzle is attached to the lower barrel opposite to the upper barrel. A stop mechanism prohibits the upper barrel from disassociating with the lower barrel.
    Type: Grant
    Filed: December 18, 2003
    Date of Patent: March 11, 2008
    Inventors: J. Kirk Leaphart, Jr., C. Mark Leaphart, Carlos R. Schoolcraft, Michael L. Ernst
  • Patent number: 5280740
    Abstract: A socket wrench is shown having a socket driver head pinned to a clevis on a shaft. A sleeve is receivable over the shaft end and includes open ended slots pointing away from the clevis. The shaft includes a pin press fit within a cross bore on the shaft end, and the shaft and sleeve are axially slidable relative to each other; where in one position the pin engages one of the slots, and in another position, the shaft and sleeve spin freely of each other. A handle includes an internal bore which is profiled to compressively fit over the sleeve, and a chamber is defined between the sleeve and the end of the internal bore, to provide clearance for the axial movement of the shaft and sleeve.
    Type: Grant
    Filed: July 11, 1990
    Date of Patent: January 25, 1994
    Assignee: MAC Tools Inc.
    Inventor: Michael L. Ernst
  • Patent number: D514760
    Type: Grant
    Filed: December 10, 2003
    Date of Patent: February 7, 2006
    Inventors: Carlos R. Schoolcraft, Michael L. Ernst
  • Patent number: D549536
    Type: Grant
    Filed: December 10, 2003
    Date of Patent: August 28, 2007
    Inventors: Carlos R. Schoolcraft, William J. Kraimer, Michael L. Ernst
  • Patent number: D499293
    Type: Grant
    Filed: December 10, 2003
    Date of Patent: December 7, 2004
    Inventors: Michael L. Ernst, William J. Kraimer
  • Patent number: D387259
    Type: Grant
    Filed: February 28, 1996
    Date of Patent: December 9, 1997
    Assignee: Senco Products, Inc.
    Inventors: C. Kerwin Braddock, Richard C. Cummins, Michael L. Ernst, William H. Morrison, Jr., Donald C. Ries, Dennis E. Stivers, Robert E. Niehaus