Patents by Inventor R. Charles Zimmerman

R. Charles Zimmerman 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).

  • Maul head partially filled with shot
    Patent number: 5375487
    Abstract: A maul assembly including a maul head having an annular body with an annular outer wall concentric to an annular inner wall and an annular chamber within the body disposed between the two walls. The annular walls and chamber are circumferentially disposed about a head center axis which is coincidental with a handle center axis of a handle attached to an end of the head. The chamber is partially filled with a quantity of flowable inertia material preferably round steel shot and preferably in a range of about 50% to 75% of the chamber's volume and preferably with steel shot.
    Type: Grant
    Filed: October 15, 1993
    Date of Patent: December 27, 1994
    Assignee: Zimmerman Packing & Mfg., Inc.
    Inventor: R. Charles Zimmerman