Patents by Inventor Luis D. Delgado

Luis D. Delgado 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).

  • Rake with pivotable arms
    Patent number: 4231218
    Abstract: A rake comprising a frame provided with wheels, a subframe pivotally connected with said frame, two board supports pivotally connected with the subframe and a plurality of rake boards rotatably journalled at the board supports is improved with the object that it can be readily constructed in a simple manner, that it satisfactorily matches slopes and unevennesses of the ground and that it can be readily moved at will into the operative position or a transport position.For this purpose the subframe is formed mainly by relatively independently pivotable arms fastened to the frame.
    Type: Grant
    Filed: October 20, 1976
    Date of Patent: November 4, 1980
    Assignee: Vicon Espana S.A.
    Inventor: Luis D. Delgado