Weight-adjustable golf club head provided with rear lightweight covering

Abstract

A weight-adjustable golf club head includes a rear lightweight covering and a golf club head body combined therewith. The rear lightweight covering has a rear crown portion and a rear wall portion extended therefrom. The golf club head body is combined with the rear lightweight covering which is designed to have a striking face, a front crown portion and a sole portion. The rear lightweight covering is made from a low specific gravity metal, and is designed to have a thickness less than 0.6 mm. The rear lightweight covering has an inner surface formed with a plurality of reinforcing ribs.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a weight-adjustable golf club head provided with a rear lightweight covering. Particularly, the present invention relates to the rear lightweight covering of the golf club head made from a low specific gravity metal. More particularly, the present invention also relates to the rear lightweight covering of the golf club head having an inner surface formed with reinforcing ribs.[0003]2. Description of the Related Art[0004]A conventional golf club head, as described in U.S. Pat. No. 6,783,465, entitled “GOLF CLUB HEAD,” includes a golf club head body and a striking plate. The golf club head body has a front portion, a crown portion and a sole portion. Furthermore, the golf club head body includes a heel side portion and a toe side portion opposite thereto. The striking plate is connected with the front portion of the golf club head body. To enhance elastic deformability, a series of recesse...

AI Technical Summary

Benefits of technology

[0010]The primary objective of this invention is to provide a weight-adjustable golf club head provided with a rear lightweight covering which has a relatively thin thickness and is made from a low specific gravity metal. The rear lightweight covering has an extension to form a rear wall portion. Accordingly, the rear lightweight covering can lower the center of gravity and reduce the weight of the golf club head.

Problems solved by technology

Although these recessed grooves can be successful in enhancing elastic deformability of the crown portion of the golf club head body, a number of design limitations exist for lowering the center of gravity of the golf club head body due to difficulties in manufacture.

A design-limiting problem due to a depth of the recessed groove is an increase of the thickness of the crown portion.

However, it would be disadvantageous to provide a thinner thickness of the crown portion and to lower the center of gravity of the golf club head body.

Another problem with providing the recessed groove is the difficulty in increasing the strength of the crown portion.

During use of the golf club head body in impacting the golf ball, the crown portion is susceptible to distortion or crack due to an ultimately thin thickness of the crown portion existing right in the recessed groove.

Another problem with the direction of extending the recessed groove across the golf club head width is susceptible to weakening the entire structure of the golf club head body.

Furthermore, another problem occurring during impacting the golf ball is a loss of the adequately elastic deformability of the crown portion due to the stress transmitting in a front-to-rear direction of the golf club head.

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