Patents by Inventor Charles D. Hartwig

Charles D. Hartwig 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: 5569168
    Abstract: A kneader massager includes a housing having an upper portion and a lower portion, each upper and lower portion partially defining a power transmission chamber having at least one opening. Also included is least one pair of massaging members for massaging the skin of a user, with each such pair of massaging members being mounted in the chamber for reciprocating movement relative to each other, and extending through the at least one opening in the housing. A motor is provided for powering the massaging members and is disposed in the power transmission chamber, and a drive assembly is also disposed in the power transmission chamber for transmitting power from the motor to the massaging members to move each pair of the massaging members between a relaxed position and a pressing position relative to each other. A principal feature of the present invention is the provision of a dwell feature in the drive assembly for periodically prolonging the massaging members in said pressing position.
    Type: Grant
    Filed: July 18, 1994
    Date of Patent: October 29, 1996
    Assignee: Wahl Clipper Corporation
    Inventor: Charles D. Hartwig
  • Patent number: D365421
    Type: Grant
    Filed: February 25, 1994
    Date of Patent: December 19, 1995
    Assignee: Wahl Clipper Corporation
    Inventors: Gregory S. Wahl, Charles D. Hartwig, Duncan Copland