Patents by Inventor Peter M. S. M. Heymans

Peter M. S. M. Heymans 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).

  • Control device supplying optimum power to oscillating drive motor for resonant-piston type compressor unit
    Patent number: 4772828
    Abstract: A control device (30) for controlling the supply of power to the coils (16A, 16B) of a drive motor (3) for a compressor unit of the resonant-piston type (1). The control device comprises a power-supply circuit (44) for energizing the motor coils from a direct voltage source (45), means (46, 47, 48; 46, 60) for determining a measure (P, .phi.), which indicates whether the power consumption of the motor as a function of the frequency of the energizing current is at least approximately maximal, and means (40, 42, 43; 61, 42, 43) for adjusting the frequency of the energizing current, depending on the derived measure (P, .phi.), to a value for which said measure indicates that the power consumption of the motor (3) is maximal.
    Type: Grant
    Filed: May 11, 1987
    Date of Patent: September 20, 1988
    Assignee: U.S. Philips Corporation
    Inventors: Peter M. S. M. Heymans, Johannes J. van Herk, Fidelus A. Boon, Rokus C. D. Lissenburg