Patents by Inventor Bertus L. Gundlach

Bertus L. Gundlach 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 measuring the volume of solid bodies and a measuring and/or reference chamber for performing said method
    Patent number: 4369652
    Abstract: Determination of the volume of solid bodies by plethysmometry: the bodies, such as human beings or animals, are brought into a measuring chamber (1) the volume of which is changed by means of a piston (8) within a cylinder (7). The change in pressure within the chamber (1) is measured and constitutes a measure of the volume of the body to be determined. The measurement may be performed with the aid of a reference chamber (5) in which the volume is also changed, i.e. by simultaneous movement of a piston (11) within a cylinder (10) together with piston (8) within cylinder (7). By comparison of pressures (by means of 17) between the chambers (1 and 5) a more accurate volume measurement is obtained than without reference chamber (5).
    Type: Grant
    Filed: February 3, 1981
    Date of Patent: January 25, 1983
    Assignee: De Rijkslandbouwhogeschool
    Inventor: Bertus L. Gundlach