Patents by Inventor David Korty

David Korty 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: 5086673
    Abstract: The disclosure describes a ratchet type of tool drive that has three partitions extending from the walls of a cavity to define channels with a spindle. The walls are thinner at a midpoint of each channel and are thicker adjacent each partition by a limited amount, such as 30 thousandths of an inch. A roller is located within each of the channels with a coil spring on each side. A retainer cover has extensions between each partition and one end of each coil spring, so that turning the cover one way or the other, applies a biasing pressure on each roller to urge the rollers in a desired direction. The structure described has fewer parts, is thinner in configuration and the rollers move in a slight rolling movement to be pinched between the narrowing walls of each channel, to achieve a positive locking and non-slipping action.
    Type: Grant
    Filed: April 22, 1991
    Date of Patent: February 11, 1992
    Inventor: David Korty