Patents by Inventor Douglas L. Kladder

Douglas L. Kladder 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 and device for monitoring radon mitigation system
    Patent number: 5197862
    Abstract: The effectiveness of a radon mitigation system is in large part a function of the vacuum and air flow produced by a fan. Since a relationship exists between the vacuum and air flow of any given fan, it is advantageous to be able to identify any malfunctions in the system which result in fan air flow being increased or decreased. Such changes in air flow may impede the ability of the system to alleviate radon concentrations. Fan air flow may be monitored by measuring current draw of the fan with an ammeter or other electric current measuring device. Such measurements may be facilitated by mounting the ammeter in a control unit including a reduction transformer, which feeds 24 volt electric current to the fan. After measurements of fan current draw have been measured and indicated, current may be increased to 120 volts by a fan voltage booster, to power the fan.
    Type: Grant
    Filed: February 10, 1992
    Date of Patent: March 30, 1993
    Inventor: Douglas L. Kladder