Patents by Inventor John Warwick Ellemor

John Warwick Ellemor 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).

  • Golf club head with dynamically movable center of mass
    Patent number: 6641490
    Abstract: A golf club, namely a driver, includes a flowing moving part within the head such as mercury or a flowable solid in an inclined U shaped hollow passage (11). The moving part (12) remains captive at the rear of the head during the downswing on an axis defined by the direction of travel and the center of mass. A golf ball impacting the head away from this axis e.g. at the toe (17) causes the head to rotate and subsequently causing the flowing moving part (18) and hence the center of mass to move to behind the point of impact i.e. the toe, thus reducing head rotation head rotation and increasing the sweet spot.
    Type: Grant
    Filed: February 11, 2002
    Date of Patent: November 4, 2003
    Inventor: John Warwick Ellemor
  • Golf club head with dynamically movable centre of mass
    Publication number: 20020082114
    Abstract: A golf club, namely a driver, includes a flowing moving part within the head such as mercury or a flowable solid in an inclined U shaped hollow passage (11). The moving part (12) remains captive at the rear of the head during the downswing on an axis defined by the direction of travel and the center of mass. A golf ball impacting the head away from this axis e.g. at the toe (17) causes the head to rotate and subsequently causing the flowing moving part (18) and hence the center of mass to move to behind the point of impact i.e. the toe, thus reducing head rotation head rotation and increasing the sweet spot.
    Type: Application
    Filed: February 11, 2002
    Publication date: June 27, 2002
    Inventor: John Warwick Ellemor