Patents by Inventor Frederic P. Buttke

Frederic P. Buttke 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).

  • Patent number: 4042131
    Abstract: An excavator comprises a boom having a normally vertically disposed dipper stick pivotally mounted on an end thereof and a support bracket pivotally mounted on a lower end of the dipper stick for to and fro movements in a first plane. The bucket is pivotally mounted on a lower end of the support bracket for sideway movements relative thereto in a second plane perpendicular to the first plane. A first double-acting hydraulic cylinder is pivotally interconnected between an upper end of the dipper stick and an upper side of the bracket to selectively pivot the bracket in the first plane whereas a second double-acting hydraulic cylinder is pivotally mounted on an outer side of the bracket and to the bucket for selectively moving the bucket in the second plane.
    Type: Grant
    Filed: August 7, 1975
    Date of Patent: August 16, 1977
    Assignee: Caterpillar Tractor Co.
    Inventor: Frederic P. Buttke