Patents by Inventor Gerrit-Jan Vogelaar

Gerrit-Jan Vogelaar 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 for regulating clutch pressure in transmission unit using pitot pressures and transmission unit applying such method
    Patent number: 5989152
    Abstract: A method for regulating a belt variator type transmission unit for motor vehicles, and which includes a belt variator, a reversing unit and a hydraulically controlled engine drive coupling that controls the reversing unit to provide forward and reverse drive connection between the engine and variator. The drive coupling comprises a forward coupling and a reverse coupling including fluid driven clutches which may be operated via a pressure regulating unit that provides an adjustable clutch actuating pressure. The clutch actuating pressure is hydraulically regulated both as a function of engine Pitot pressure which is representative of the engine speed, and as a function of a regulated pressure which is set by an electronically controlled valve.
    Type: Grant
    Filed: December 4, 1997
    Date of Patent: November 23, 1999
    Assignee: VCST, naamloze vennootschap.
    Inventors: Dirk Louis Reniers, Gerrit-Jan Vogelaar, Stijn Marie Alfred Helsen