Patents by Inventor Douglas K. Graham

Douglas K. Graham 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).

  • Flow control methods and devices
    Patent number: 9574337
    Abstract: A method for delaying the maximum rate of discharge of water from a stormwater retention basin includes varying the vertical distance of an intake opening from the waterline inversely with water depth. A flow control device for carrying out the method includes an intake pipe with an intake opening that is pivotally mounted to a float body, the pivot being spaced from the intake opening.
    Type: Grant
    Filed: August 8, 2013
    Date of Patent: February 21, 2017
    Assignee: Lane Enterprises, Inc.
    Inventors: Timothy Joel Lang, Patrick X. Collings, Douglas K. Graham
  • Flow control device
    Patent number: 9309989
    Abstract: A flow control device includes a float that moves vertically in response to changes in water level, a valve body that moves between extended and retracted positions, and a mechanism interconnecting the float and the valve body wherein changes of position of the float in response to changes in water level changes the position of the valve body. The valve body is placed adjacent a discharge pipe to change the effective intake area of the discharge pipe with changes in water level.
    Type: Grant
    Filed: November 1, 2013
    Date of Patent: April 12, 2016
    Assignee: Lane Enterprises, Inc.
    Inventors: Timothy Joel Lang, Patrick X. Collings, Douglas K. Graham
  • Flow control device for a storm water management system
    Patent number: 9290923
    Abstract: A flow control device for a storm water management system includes a storage chamber and a number of discharge openings extending through the storage chamber. Associated with each opening is a valving mechanism that opens or closes the opening in response to changes in water level in the storage chamber.
    Type: Grant
    Filed: November 1, 2013
    Date of Patent: March 22, 2016
    Assignee: Lane Enterprises, Inc.
    Inventors: Timothy Joel Lang, Patrick X. Collings, Douglas K. Graham