Patents by Inventor Cornelis E. Van Berkel

Cornelis E. Van Berkel 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 positioning a means of fixing consisting of a screw and a plate
    Patent number: 4817275
    Abstract: Device for screwing screws through a hole of a plate into a base plate for securing insulating material, the device having a magazine with plates and a magazine with screws. The device has a screw driver which can be moved up and down. The screw driver according to the invention feeds a plate and a screw towards their mating position in line with the screw driver during the upward stroke of the screw driver.
    Type: Grant
    Filed: July 29, 1987
    Date of Patent: April 4, 1989
    Inventor: Cornelis E. Van Berkel
  • Method for manufacturing a stack of supporting plates
    Patent number: 4787235
    Abstract: Washer or supporting plate with means preventing the sticking together of the washers in a magazine. Said means are formed by protrusions. The method for manufacturing the washers as well as the device make the protrusions such that in the stack they are staggered with respect to the protrusions of a preceding and a next washer.
    Type: Grant
    Filed: July 29, 1987
    Date of Patent: November 29, 1988
    Inventor: Cornelis E. Van Berkel