Patents by Inventor David G. Simmons

David G. Simmons 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: 7740399
    Abstract: A feeder system comprising a hopper for holding dry chemical. A feed tube extends from the hopper and is for delivering dry chemical to a mixing tank. A first solenoid actuator is provided for controlling the opening and closing of a first solenoid actuated gate that is disposed in the feed tube. A second solenoid actuator is provided for controlling the opening and closing of a downstream second solenoid actuated gate disposed in the feed tube. A central controller is provided that is in communication with and controls the system components including the introduction of the dry chemical and process water into the mixing tank. The central controller controls a metering pump that pumps chemical mixed solution out of the mixing tank.
    Type: Grant
    Filed: July 5, 2007
    Date of Patent: June 22, 2010
    Assignee: Pulsafeeder, Inc.
    Inventors: David G. Simmons, Ashok Vellaiah Retnaswamy
  • Publication number: 20080144429
    Abstract: A feeder system comprising a hopper for holding dry chemical. A feed tube extends from the hopper and is for delivering dry chemical to a mixing tank. A first solenoid actuator is provided for controlling the opening and closing of a first solenoid actuated gate that is disposed in the feed tube. A second solenoid actuator is provided for controlling the opening and closing of a downstream second solenoid actuated gate disposed in the feed tube. A central controller is provided that is in communication with and controls the system components including the introduction of the dry chemical and process water into the mixing tank. The central controller controls a metering pump that pumps chemical mixed solution out of the mixing tank.
    Type: Application
    Filed: July 5, 2007
    Publication date: June 19, 2008
    Inventors: David G. Simmons, Ashok Vellaiah Retnaswamy
  • Publication number: 20080078780
    Abstract: An automatic dispenser for dispensing a liquid such as a cleaning or disinfecting liquid to a fixture. The dispenser includes a housing with a reservoir. A removable container of liquid is installed in the housing such that the liquid flows by gravity through the opening in the container into the reservoir. A pinch valve controls the flow of liquid from the reservoir and provides for a reliable dispensing system aided by gravity.
    Type: Application
    Filed: October 3, 2007
    Publication date: April 3, 2008
    Inventors: Nancy S. Sanger, H. Bradley Calkins, David G. Simmons
  • Patent number: 6092340
    Abstract: A structural framing system having a plurality of elongated members which are capable of assembly with a minimum number of specialty tools and with minimal use of specialty labor and which provides superior strength. The structural framing system of the current invention with the unique cross sectional shape of its elongated members lends itself to manufacture from pultruded fiberglass material in a preferred embodiment. The present invention when manufactured in its preferred embodiment provides superior corrosion, fire and weather resistance while also providing a structural framing system which is light enough to be easily transportable.
    Type: Grant
    Filed: December 18, 1998
    Date of Patent: July 25, 2000
    Inventor: David G. Simmons
  • Patent number: 5275366
    Abstract: A fixture mounting bracket having a mounting bracket body including a front wall and a back wall. At least a section of the back wall has a stepped configuration that conforms generally to the lapped profile of exterior siding. Disposed on at least a portion of the section of the back wall having the stepped configuration is a gasket. The gasket resists dirt and moisture from entering between the mounting bracket body and the siding. A fixture assembly is also disclosed.
    Type: Grant
    Filed: November 18, 1992
    Date of Patent: January 4, 1994
    Assignee: Aluminum Company of America
    Inventor: David G. Simmons