Patent ID: 6881157

Claim:
A golf club comprising: a hand grip; a club head, and a club body between the hand grip and the club head; and a cross section area of the club body including a front portion having a first inclined and a second inclined surfaces that define a front cusp in a front connection end of said first and said second inclined surfaces; a rear portion having a third inclined surface and a fourth inclined surface that define a rear cusp at a rear connecting end of the third and fourth inclined surfaces; and a middle section between the front portion and the rear portion; the middle section having two sides; one side being connected between the first inclined surface and the third inclined surface; and the other side being connected between the second inclined surface and the fourth inclined surface; each of the two sides being concave into the club body; and each of the two sides of the middle section having only one concave surface; wherein in a direction from the handgrip to the club head, the club body has at least one reduced segment having a smaller size than other portion thereof, and a shoulder enclosing a respective end of the reduced segment is formed between each reduced segment and an adjacent portion of the golf club; the reduce segment is wholly reduced from the adjacent portion.