Patents by Inventor William F. Dirst

William F. Dirst 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: 8627859
    Abstract: A method and apparatus for recharging depleted tennis balls that uses pressurized gas. A recharge pressure vessel includes a cylindrical shell with a closed end and a spaced apart opening top with a connecting wall forming a charging chamber. The vessel may be pivotally secured to a base. A pressure port proximate the open end permits gas entry and exit for charging. The chamber may be filled with any number of discharged tennis balls and then is sealed and charged with high pressure gas such as carbon dioxide. The balls will become sufficiently recharged and the pressure may be released and the recharged balls remove from the vessel.
    Type: Grant
    Filed: January 12, 2010
    Date of Patent: January 14, 2014
    Assignee: Rebounces, LLC
    Inventor: William F. Dirst
  • Publication number: 20120291914
    Abstract: An apparatus, system and method for recharging depleted pressurized balls that uses pressurized gas is disclosed. A pressure vessel includes a cylindrical shell with a closed end and a spaced apart and opening top connected by a wall to form a charging chamber. The vessel may be pivotally secured to a base. A port in the outer wall, closed end, or top of the vessel permits gas entry and exit for charging. The chamber is filled with an appropriate number of discharged balls and then is sealed and charged with high pressure gas having a molecular weight heavier than air. The chamber is monitored to determine when the balls have reached a desired internal pressure. Once the balls reach the desired internal pressure they are removed.
    Type: Application
    Filed: May 18, 2012
    Publication date: November 22, 2012
    Inventor: William F. DIRST
  • Publication number: 20100307637
    Abstract: A method and apparatus for recharging depleted tennis balls that uses compressed carbon dioxide. A recharge pressure vessel including a cylinder with a closed end and a spaced apart open end with a connecting wall forming a charging chamber. A pressure port proximate the open end permits gas entry and exit for charging. The chamber may be filled with any number of discharged tennis balls and then is sealed and charged with high pressure heavy molecular weight gas such as carbon dioxide. The vessel is then agitated to jostle the inserted balls and within 4 to 5 days, the balls will become fully pressurized and the pressure may be released and the recharged balls remove from the vessel.
    Type: Application
    Filed: January 12, 2010
    Publication date: December 9, 2010
    Inventor: William F. Dirst
  • Patent number: 7658211
    Abstract: A method and apparatus for recharging depleted tennis balls that uses compressed carbon dioxide. A recharge pressure vessel including a cylinder with a closed end and a spaced apart open end with a connecting wall forming a charging chamber. A pressure port proximate the open end permits gas entry and exit for charging. The chamber may be filled with any number of discharged tennis balls and then is sealed and charged with high pressure heavy molecular weight gas such as carbon dioxide. The vessel is then agitated to jostle the inserted balls and within 4 to 5 days, the balls will become fully pressurized and the pressure may be released and the recharged balls remove from the vessel.
    Type: Grant
    Filed: June 19, 2007
    Date of Patent: February 9, 2010
    Inventor: William F. Dirst