Patents by Inventor Lew G. Darden

Lew G. Darden 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 apparatus for controlling temperature and ventilation in an animal confinement building
    Patent number: 6042475
    Abstract: A method and apparatus for controlling temperature and ventilation in an animal confinement building comprising a series of semi-rigid panels that are suspended in cascading arrangement along a flexible cable. The cable is connected to a mechanism for extending and retracting the cable so as to cause the panels to be lowered to open the aperture or raised to close the aperture according to sensed temperature and pressure conditions within the animal confinement building.
    Type: Grant
    Filed: October 7, 1998
    Date of Patent: March 28, 2000
    Inventor: Lew G. Darden