Patents by Inventor Geert Jan Jongstra

Geert Jan Jongstra 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 tools for manufacturing a master cylinder for a brake system, and cylinder manufactured therewith
    Publication number: 20040025688
    Abstract: A method for manufacturing a master cylinder for a brake system, comprising a cylindrical main body, at least one flange integrally connected therewith, and a bore, extending in the cylindrical main body and through said at least one flange, wherein the master cylinder is manufactured by cold forging. Preferably the flange is cold forged by upsetting. Subsequently the cylindrical main body is provided with a bore. Said bore is realized in a series of forging steps, wherein at least the portion where the bore pierces the flange is executed in a separate step.
    Type: Application
    Filed: August 12, 2002
    Publication date: February 12, 2004
    Inventors: Leonardus Gerhardus P. Koekenberg, Geert Jan Jongstra, Henricus Johannes M. Alferink