Patents by Inventor Curtis Wayne Spears, Jr.

Curtis Wayne Spears, Jr. 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).

  • Infinitely adjustable, low deadband, point contact pneumatic level switch
    Patent number: 6591860
    Abstract: A zero to 100% continuously adjustable, low deadband, point contact pneumatic level switch is used in conjunction with an electronic controller, a pneumatic-to-current converter and a current-to-pneumatic converter to control brine level in a gravity-fed batch process. The apparatus includes a flapper disc assembly that is free to rotate or spin in place as the mechanism tracks the level of the fluid and a nozzle to seal, expel and transmit a pneumatic signal for measurement or control of fluid level. The flapper disk/nozzle assembly does not come in contact with the controlled fluid.
    Type: Grant
    Filed: November 17, 2000
    Date of Patent: July 15, 2003
    Assignee: Shell Oil Company
    Inventors: Mark Anthony Weber, Curtis Wayne Spears, Jr., Alvin Joseph Egle, Jr., Curt Joseph Hymel