Patents by Inventor Tage Westerlund

Tage Westerlund 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).

  • Locking device for a door
    Patent number: 3991858
    Abstract: A locking device for a holding door on an elevator shaft including a barrier member that is interconnected to a locking arm, said locking arm being alternately engageable and disengageable with a stop means so that the barrier member can only be moved out of way of the holding door when the elevator is adjacent to the holding door.
    Type: Grant
    Filed: April 9, 1974
    Date of Patent: November 16, 1976
    Assignee: Linden-Alimak AB
    Inventor: Tage Westerlund