GOLF STICK HEAD (VERSIONS) AND SET OF GOLF STICK HEADS Russian patent published in 1997 - IPC

FIELD: sports equipment. SUBSTANCE: golf stick head has body defining heel, toe, upper wall, base and front wall, which defines front and rear surfaces inclined upward. Body has main cavity positioned at rear side and undercutting cavity positioned behind rear surface of front wall, which extends in outer directions from main cavity to upper wall and bottom wall in the vicinity of rear surface. Ratio of height D(1) of rear surface of front wall and height D(2) of front wall of section between top and bottom points is within the range of 0.90 <D(1) / D(2) <0.95. EFFECT: increased efficiency by improved stick twisting resistance and decelerated transmission of energy to ball. 29 cl, 17 dwg