Method and apparatus for improving dynamic response of golf club
AssigneeBalance-Certified Golf, Inc.
InventorJeffrey L. Lindner
Life of this patent
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Abstract
An apparatus and method for improving the dynamic response of a golf club is disclosed. One embodiment is a shaft extension comprising a cylindrical member having a lower sleeve portion and an upper housing portion. The sleeve is sized to be inserted into the grip end of a golf club shaft with the upper housing extending from the end of the shaft. The housing has a hollow, open chamber in which a weighted insert is inserted and removably secured. Interchangeable inserts with varying masses are provided such that the dynamic response of the club may be tuned by adjusting the location of grip-end node of the fundamental modeshape of the club's response to a predetermined input.
Claims25
A shaft extension for improving the dynamic response of a golf club having an elongated shaft with a lower head end and an upper grip end, the head end having a club head attached thereto and the grip end being hollow and having an inner and outer diameter, said shaft extension comprising:
- a cylindrical member comprising a lower sleeve sized for snug insertion in said grip end of said shaft and an upper housing of a diameter slightly larger than the inner diameter of said grip end, whereby said housing extends from said shaft when said sleeve is inserted therein, said housing having a chamber therein open at the upper end thereof;
- an insert of predetermined weight for insertion into said housing;
- means for removably securing said insert to said housing;
- such that said club may be selectively weighted above the shaft for selectively improving its dynamic response without changing the overall length of the shaft and shaft extension in combination.
A shaft extension for improving the dynamic response of a golf club having an elongated shaft with a lower head end and an upper grip end, the head end having a club head attached thereto and the grip end being hollow and having an inner and outer diameter, said shaft extension comprising:
- a cylindrical member comprising a lower sleeve of a diameter slightly smaller than the inner diameter of said grip end of said shaft for snug insertion therein and an upper housing of a diameter slightly larger than the inner diameter of said grip end of said shaft, whereby said housing extends from said shaft when said sleeve is inserted therein, said housing having an interior chamber with an opening at the top of said housing;
- an insert of predetermined weight removably secured within said housing;
- such that said club may be selectively weighted above the shaft for selectively improving its dynamic response, without changing the overall length of the shaft and shaft extension in combination.
A method of improving the dynamic response of a golf club, said club having an elongated shaft with a lower head end and an upper grip end, the head end having a club head attached thereto, and wherein the golf club in response to a predetermined input exhibits a fundamental modeshape with a grip-end node at a first location, said method comprising selectively adding weight to the grip end of said club until said grip-end node moves from said first position to a second position closer to said grip end.
Dependencies are inferred from the claim text.