Patents by Inventor N. Van Der Est

N. Van Der Est 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).

  • Filtration system for recycling water used in a car wash
    Patent number: 5556535
    Abstract: The invention relates to a method for the purification of a polluted liquid, especially a washing liquid used at a washing installation, by sucking the polluted liquid and leading it through at least one filter and next leading back the liquid purified thus to a take-off point, whereby the liquid flow carried through the filter is maintained at a substantially constant level. The invention further relates to an apparatus for carrying out the method comprising a suction line connected to a source of polluted liquid, a discharge line for the purified liquid debouching at a take-off point, at least one filter unit positioned between the suction line and the discharge line, a pump connected therewith in series and a device for limiting the amount of liquid flowing across the filter unit positioned in series with the filter unit.
    Type: Grant
    Filed: October 28, 1994
    Date of Patent: September 17, 1996
    Assignee: Micro Tec B.V.
    Inventor: N. Van Der Est