Golf club having selectively adjustable internal pressure

A golf club having selectively adjustable internal pressure, comprising:

• a head having a face and a neck;
• a shaft connected with said neck, said shaft having a distal end opposite said neck, said shaft having a shaft chamber that provides an air tight hollow space therewithin, said shaft chamber extending substantially between said neck and said distal end;
• and
• valve means for providing connection of a source of selectively pressurized gas to said shaft chamber to thereby provide a gas having a selected internal pressure below atmospheric pressure in said shaft chamber.

A golf club having selectively adjustable internal pressure, comprising:

• a head having a face and a neck, said head having a head chamber that provides an air tight hollow space within said head;
• a shaft connected with said neck, said shaft having a distal end opposite said neck, said shaft having a shaft chamber that provides an air tight hollow space within said shaft, said shaft chamber extending substantially between said neck and said distal end;
• plug means for providing an air tight seal between said head chamber and said shaft chamber so that said head chamber is fluidically isolated from said shaft chamber;
• first valve means for providing connection of a source of selectively pressurized gas to said shaft chamber to thereby provide a first gas having a first selected internal pressure in said shaft chamber;
• and
• second valve means for providing connection of a source of selectively pressurized gas to said head chamber to thereby provide a second gas having a second selected internal pressure in said head chamber.