Patents by Inventor David M. Callahan

David M. Callahan 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: 7424327
    Abstract: An industrial control system includes a central controller having a memory containing programmable data including operating programs for operating the controller, control program for controlling an industrial process, and configuration data configuring values used by the operating program and control program. The central controller is designed to control multiple devices also having memory holding programmable data including operating programs and configuration data. A program is executable by the central controller that causes the central controller to identify memories distributed through the industrial control system having programmable data and collect the programmable data from the memories. Accordingly, the collected programmable data may be used to substantially recreate operation of the industrial control system in a second industrial control system having another central controller substantially identical to the industrial controller and multiple devices connected to the central controller.
    Type: Grant
    Filed: January 30, 2006
    Date of Patent: September 9, 2008
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: Richard J. Grgic, Fabio Malaspina, Brian A. Batke, Harcharan Rajagopal, David M. Callahan
  • Patent number: 5333832
    Abstract: An improved ram-type blowout preventer having an improved resilient ram packer which includes an upper retainer plate and a lower retainer plate which each have a front face with a central recess therein, a back and sides, resilient end elements bonded between the plates at the sides and having facing surfaces extending from front to back and a resilient insert shaped to be positioned between said plates and between said end elements with sides mating with the shape of the facing surfaces of the end elements.
    Type: Grant
    Filed: October 4, 1993
    Date of Patent: August 2, 1994
    Inventors: Leroy E. Bartholomew, Eric G. Childs, David M. Callahan