Patents by Inventor John L. Beintema

John L. Beintema 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: 5803836
    Abstract: A device for practicing hitting a ball is disclosed. The device comprises a support arm. A ball is suspended from the support arm such that the ball swings generally vertically in a substantially upright plane of rotation when the ball is struck substantially squarely. A selectively adjustable mechanism provides for a plurality of different, substantially upright rotational planes in which the ball can swing on the support arm when the ball is struck squarely, to thereby permit practice of different hitting skills depending upon which vertical rotational plane has been selected.
    Type: Grant
    Filed: October 25, 1996
    Date of Patent: September 8, 1998
    Inventor: John L. Beintema
  • Patent number: 5000450
    Abstract: A batting practice device which comprises an elongated support arm having fastening means at one end for securing the support arm to the side of a post. The fastening means includes an elongated chain which may be wrapped around the post and has one end thereof releasably retained on the support arm against a sliding movement of the chain. The other end of the chain is connected to a bolt which may be drawn through a handle as the handle is rotated to tighten the chain against the post. A ball is suspended from the support arm by an eyelet containing cord to serve as a target for batting practice. A handle which is releasable by hand holds the ball on a reduced diameter stud member at a free end of the support arm.
    Type: Grant
    Filed: April 30, 1990
    Date of Patent: March 19, 1991
    Inventor: John L. Beintema