Patents by Inventor Walter Klenk

Walter Klenk 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).

  • Method and apparatus for damping pressure peaks occurring at the end of the mold filling phase in pressure casters
    Patent number: 4832109
    Abstract: The invention relates to a method of damping the pressure peak occurring at the end of the die filling phase in die casting machines, with a hydraulic damping device being disposed between the piston rod of the drive piston and the piston rod of the casting piston. The damping chamber of the damping device is closed by a control piston through which no fluid flows in the case of damping and which is not required to move against the direction of movement of the casting piston rod in order to open the control edge. It is here the object of the invention to shorten to a minimum the response time of the control piston. According to the invention, a device is proposed for this purpose which is characterized in that the chamber (25) disposed on the side opposite the reservoir chamber (10) of the control piston (4) is connected to a pressure medium conduit (26) in which a control valve (27) is disposed.
    Type: Grant
    Filed: September 24, 1987
    Date of Patent: May 23, 1989
    Assignee: Maschinenfabrik Muller-Weingarten AG
    Inventor: Walter Klenk