Iron-type golf clubs

Details Iron-type golf clubs Iron-type golf clubs

1982-03-22

1983-12-13

Marlo, George J.

Amusement devices: games

Aerial projectile game; game element or accessory therefor...

Target

273169, A63B 5300

Patent

active

044201567

ABSTRACT:
A set of iron-type golf clubs is designed to have gear effect so that a golf ball which is hit off-center on the club is provided with a corrective spin which will tend to bring the ball back to the intended line of flight.
Each clubhead is provided with a cavity in its rear face, and the dimensions of the cavity and the dimensions of the clubhead are selected so that the center of gravity of each clubhead of the set is spaced progressively farther behind the striking face of the clubhead as the loft angle of the clubhead decreases, the moment of inertia of each clubhead progressively decreases as the loft angle of the clubhead decreases, and the radius of gyration of all of the clubheads is relatively constant. In one specific embodiment the center of gravity for clubs 2 through 9 varied from 0.171 to 0.114 inch behind the striking face, the moment of inertia varied from 13.619 to 16.423 ounce (wt.)-in..sup.2, and the radius of gyration varied between 1.271 and 1.291 inch.

REFERENCES:
patent: 1854548 (1932-04-01), Hunt
patent: 2447967 (1948-08-01), Stone
patent: 2846228 (1958-08-01), Reach
patent: 3655188 (1972-04-01), Solheim
patent: 3995857 (1976-12-01), Cochran et al.
patent: 4027885 (1977-06-01), Rogers
patent: 4322083 (1982-03-01), Imai

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