Patents by Inventor Maarten J. Van Kerkvoort

Maarten J. Van Kerkvoort 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).

  • Fluid actuators
    Patent number: 5040452
    Abstract: A fluid actuator including a pair of hingedly interconnected members between which is located a fluid expansible element such as a bellows which may be expanded upon application of fluid pressure to cause pivotal movement of the hingedly interconnected members. The actuator may also include a further pair of hingedly interconnected members which are themselves hinged to the first pair of members and which define with the first pair of members a space for receipt of the fluid expansible element.
    Type: Grant
    Filed: May 11, 1990
    Date of Patent: August 20, 1991
    Inventor: Maarten J. Van Kerkvoort