Patents by Inventor Frederik M. Van Middeldorp

Frederik M. Van Middeldorp 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).

  • System for measuring the penetration depth of an elongated object into the ground
    Patent number: 5448914
    Abstract: System for measuring the penetration depth of an elongated object such as a pile, tube, sheet pile or drill into the ground, to be used in combination with an installation for bringing the elongated object into the ground for instance by pressing, hammering, vibrating, drilling or lowering, or for pulling or otherwise removing the elongated object out of the ground. The system comprises a member for measuring the displacement of the elongated object embodied as a flexible elongated element the weight of which is uniformly distributed along its length, the length being at least equal to the maximum displacement of the elongated object. At least part of the elongated element is supported by a supporting surface. Structure is present to determine the total weight of that section of the flexible elongated element which is supported by the supporting surface.
    Type: Grant
    Filed: March 11, 1994
    Date of Patent: September 12, 1995
    Assignee: Nederlandse Organisatie voor Toegepast-Natuurwetenschappelijk
    Inventor: Frederik M. Van Middeldorp