Patents by Inventor Piet van der Vlist

Piet van der Vlist 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).

  • Process and device for continuous ultrasonic washing of textile
    Patent number: 6266836
    Abstract: A process and apparatus for ultrasonic cleaning of materials in which vibrating plates are used in close contact with a material to be cleaned. The material is placed in a shallow liquid and the vibrator of the plates eliminate dirt or contaminating substances from the material by cavitation of the liquid. The vibrating plates are flexurally vibrated at a frequency which correspond to its resonant frequency and is one of a sonic or ultrasonic frequency. The acoustic field created by the oscillation of the plates and in cleaning the material. A pledging system may also include ultrasonic vibrating plates to assist in expelling water.
    Type: Grant
    Filed: December 27, 1999
    Date of Patent: July 31, 2001
    Assignee: Consejo Superior de Investigaciones Cientificas
    Inventors: Antonio Gallego Juarez, German Rodriguez Corral, Gonzalo Najera Vazquez de Parga, Fernando Vazquez Martinez, Piet van der Vlist