Patents by Inventor Johann Daniel Meijer

Johann Daniel Meijer 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).

  • Ram device
    Patent number: 4056150
    Abstract: A ram device has a drop hammer connected to the piston of a lifting cylinder which is connected by means of short and wide ducts to a control apparatus for admitting compressed air into the cylinder and for discharging the air from the cylinder beneath the piston, control apparatus directly communicating with the ambient air so as to allow a rapid escape of the air through large air vent ports from beneath the piston. In particular this control apparatus is directly mounted on the cylinder, or is included in an extension of this cylinder.
    Type: Grant
    Filed: January 9, 1976
    Date of Patent: November 1, 1977
    Assignee: N.V. Appingedammer Bronsmotorenfabriek
    Inventor: Johann Daniel Meijer