Patents by Inventor Carl G. Lindgren

Carl G. Lindgren 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).

  • Device for spotting within tolerance apparatus associated with the coke oven chambers of a battery
    Patent number: 4049501
    Abstract: An alignment bar is fixed relative to each coke oven chamber and a pivotable member mounted to apparatus movable relative to the battery engages the bar of a coke oven chamber and in so doing engages electrical contactors that regulate the movement of the apparatus. The apparatus is properly spotted within a preselected tolerance when the pivotable member breaks contact.
    Type: Grant
    Filed: February 11, 1975
    Date of Patent: September 20, 1977
    Assignee: Koppers Company, Inc.
    Inventor: Carl G. Lindgren
  • Apparatus for cleaning the bottom surface of a coke oven door plug
    Patent number: 3990948
    Abstract: A cleaner head is pivotally mounted to a shaft carried by an actuating arm that is so powered that, as the actuating arm pivots about an axis, the cleaner head, which is resiliently biased, engages and cleans the bottom surface of a coke oven door plug or lining.
    Type: Grant
    Filed: February 11, 1975
    Date of Patent: November 9, 1976
    Assignee: Koppers Company, Inc.
    Inventor: Carl G. Lindgren