Patents by Inventor Jan Mulder

Jan Mulder 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).

  • Cooling system
    Patent number: 3994337
    Abstract: A cooling system for a combustion engine with a radiator wherein a plurality of cooling medium pipes are arranged in one plane, the pipes being connected by strips of gauzes, with air ducts between the strips or in the gauzes having a hydraulic diameter (d.sub.h) of less than 2 mm, the length (L) of said ducts being less than 25 mm, and L/d.sub.h <25. The radiator is preceded by a dirt collector consisting of a thin zigzag-folded air-transmitting layer with ducts having a hydraulic diameter of less than 2 mm.
    Type: Grant
    Filed: May 7, 1975
    Date of Patent: November 30, 1976
    Assignee: U.S. Philips Corporation
    Inventors: George Albert Apolonia Asselman, Jan Mulder
  • Cold-gas refrigerator
    Patent number: 3991585
    Abstract: A cold-gas refrigerator of the type in which the displacer is driven by pressure fluctuations generated in the working medium, the piston being coupled to an a.c. supplied linear actuator; the system formed by piston/armature coil assembly of the actuator and working medium resonates at a frequency which is tuned to the alternating current frequency.
    Type: Grant
    Filed: December 5, 1974
    Date of Patent: November 16, 1976
    Assignee: U.S. Philips Corporation
    Inventor: Jan Mulder