Iron golf club

a golf club and iron technology, applied in golf clubs, golf, sport apparatus, etc., can solve the problems of inability to make the edge sharpening of the groove substantially impossible, restricted improvement applied to the surface of the face of the golf club, etc., to and reduce the vertical moment of inertia
US20090023513A1Inactive Publication Date: 2009-01-22ENDO MFG COMPANY
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Patent Information

Authority / Receiving Office
US · United States
Current Assignee / Owner
ENDO MFG COMPANY
Publication Date
2009-01-22
Estimated Expiration
Not applicable · inactive patent

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Abstract

An iron golf club for enhancing the gear effect and accelerating backspin of a ball. The head, which comprises a face part having a ball-hitting surface, a sole part having a ground-contact plane in the bottom portion of the head, a top part, and a hosel part, is configured such that the rigidity on the ground-contact plane side of the bottom portion is lowered by either providing the portion with a cavity or changing its material. Further, the vertical moment of inertia of the head is reduced by disposing a weight in the location of the center of gravity of the head. When the length of the hosel part is 50 mm or longer, the value of the moment of inertia becomes less than 800 g·cm2, and when the length of the hosel part is less than 50 mm, the value of the moment of inertia becomes 750 g·cm2 or less. These configurations realize a golf club that enhances the gear effect and accelerates spin of a ball.
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Description

BACKGROUND OF THE INVENTION

[0001] 1. Field of the Invention

[0002] The present invention relates to an iron golf club that enhances the gear effect, and more particularly to an iron golf club that lowers the rigidity of the sole portion of the head, reduces the head moment of inertia, enhances the gear effect, and accelerates ball spin.

[0003] 2. Description of the Related Art

[0004] Various improvements have been made to the golf club over time for enabling stable shots to thereby increase carry and hit the ball to a precise location. In particular, iron-type golf clubs include, for example, a pitching wedge or sand wedge. These iron-type golf clubs, as a rule, are constituted such that the pitch of the face is predetermined, and a sole surface is provided in the lower portion relative to a face surface, which is the ball-hitting surface, and are golf clubs used when ball-hitting accuracy is demanded in particular.

[0005] A variety of iron golf club structures have been proposed, and a play...

Claims

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