Patents by Inventor Tage S. Westerlund

Tage S. 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).

  • Drive system for wire rope hoists
    Patent number: 4502570
    Abstract: A hoist cage is supported by a loop of rope extending around a drive sheave and an idler sheave respectively positioned at the ends of the hoist cage path and attached to the hoist cage by attachment of separate ends of the loop to separate drums rotatably attached to the hoist cage. The drums are coupled to rotate together to take up and pay out rope at different rates and in opposite senses with the rate being higher for the drum from which the rope extends downwardly.
    Type: Grant
    Filed: September 30, 1982
    Date of Patent: March 5, 1985
    Assignee: Linden-Alimak AB
    Inventor: Tage S. Westerlund