Patents by Inventor Heinz W. Dreher

Heinz W. Dreher 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).

  • Clutch mechanism
    Patent number: 4250942
    Abstract: A ball clutch mechanism in a spring motor for a tubular roller-blind rod or the like. The clutch includes a hub or outer clutch member rotatably mounted on a cylindrical portion of a shaft made of plastics and forming an inner clutch member including clutch ball receiving recesses. The hub has straight ball channels and is made of plastics in one piece. The hub is locked in an axial position on the shaft by a locking pin engaging a groove in the shaft. The locking pin has a stop arm located to retain the respective clutch ball in the ball channel.
    Type: Grant
    Filed: June 30, 1978
    Date of Patent: February 17, 1981
    Assignee: Heinz Walter Dreher
    Inventors: Heinz W. Dreher, Bo S. O. Persson