Patents by Inventor Othal Ballard

Othal Ballard 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).

  • Patent number: 5189388
    Abstract: A visual and audible alarm are connected to a control circuit for an oil well pumping unit. The control circuit includes a time clock which controls the intermittent ON-OFF cycle of operation of the pumping unit in the automatic mode, the OFF portion of the cycle allowing the well to recover pressure. The audible and visual alarm operates through a time delay relay connected to the time clock to provide a warning to people in the vicinity of the pump of the imminent start-up of the pump before allowing the pump to start, thereby providing people in the area the opportunity to avoid injury by evacuating the area.
    Type: Grant
    Filed: March 4, 1991
    Date of Patent: February 23, 1993
    Inventors: Judy A. Mosley, Othal Ballard