Patents by Inventor Werner Dahlem

Werner Dahlem 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).

  • Shield tubbing for longwalls
    Patent number: 4085592
    Abstract: A shield tubbing for longwalls comprises a support tub and a break shield is pivotally mounted on said support tub. A double arm balance beam is pivotally supported on said tub and it includes a first arm portion which is connected at one end to a hydraulic ram. The hydraulic ram is connected to act against the break shield. The second arm of the balance beam bears on the shield between the pivotal support of the shield and the point of connection of the ram to the shield.
    Type: Grant
    Filed: February 5, 1976
    Date of Patent: April 25, 1978
    Assignee: Rheinstahl AG
    Inventor: Werner Dahlem