Patents by Inventor Bertil Carlstrom

Bertil Carlstrom 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).

  • Fastener for locking a rotatable part to a shaft
    Patent number: 3953140
    Abstract: A device is disclosed for locking a first screw, or other rotatable part, within a cavity in an impeller. The screw incorporates a cavity containing a spring. A second screw is positioned in the head of the first screw in such a way that it may be used to force the spring into resilient cooperation with the surrounding surface. The first screw is locked thereby to the surrounding surface and is prevented from threading-out under certain heavy load conditions. This development is especially useful for locking an impeller to a pump shaft.
    Type: Grant
    Filed: January 31, 1974
    Date of Patent: April 27, 1976
    Assignee: ITT Industries, Inc.
    Inventor: Bertil Carlstrom