Putter-heads

Details Putter-heads Putter-heads

2005-10-04

2005-10-04

Passaniti, Sebastiano (Department: 3711)

Games using tangible projectile

Golf

Club or club support

C473S340000, C473S341000, C473S349000, C473S330000

Reexamination Certificate

active

06951517

ABSTRACT:
A putter-head (1) has its center of mass (15) spaced p mm behind its impact-face (8) at a height hcmm above the head-bottom (9), a loft angle α12at height 12 mm above the head-bottom (9), a moment of inertia/kg-mm2about the vertical axis through the center of mass (15), a mass M kg and a radius of gyration of K mm about the heel-toe axis (2-10) of the head through the center of mass (15), where p/l is not more than 0.18, hcis less than [12−p×sin(α12)], and a parameter G=[p+(3.2+70×M)×K2/p] is less than 350. The ratio d2/K is less than 1.0, d2mm being the vertical offset above the heel-toe axis (2-10) of the axis of attachment of the putter-shaft (3) to the putter-head (1); the attachment-axis of the shaft may be spaced by no more than the shaft-radius from the center of mass. The impact-face (36) may have an upper flat section (38) that merges smoothly into a cylindrical lower section (39), and the head (30) may be constructed with a high-density part (32;40) that extend lengthwise of the heel-toe axis and is either bonded to the underside of a lower-density part (31), or forms both an upstanding front flange (43) and a rear body-section (41) of larger mass than, and spaced from, the flange (43).

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