Patents by Inventor David S. Froelich

David S. Froelich 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: 5340111
    Abstract: A golf practice apparatus that includes a platform that is pivoted about a universal Joint by a pair of hydraulic actuators. The universal joint couples the platform to a centrally located post which extends from a base structure. The universal joint is located in close proximity to the platform so that a centrally located player is not laterally displaced when the platform is rotated about the joint. The apparatus also has a spherically shaped cowling that cooperates with a cylindrically shaped shroud to completely enclose the underside of the platform. Movement of the actuator pistons is controlled by a pair of solenoid control valves which receive input signals from a foot switch. The foot switch has a plurality of buttons which can be depressed by the user to move the platform into a number of different positions.
    Type: Grant
    Filed: June 10, 1993
    Date of Patent: August 23, 1994
    Inventor: David S. Froelich