Games using tangible projectile – Golf – Club or club support
Reexamination Certificate
2000-01-12
2002-02-26
Passaniti, Sebastiano (Department: 3711)
Games using tangible projectile
Golf
Club or club support
C473S345000, C473S349000
Reexamination Certificate
active
06350209
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates generally to a golf club head, and more particularly to a golf club head comprising a head case and a ball-striking plate which is doubly fused with the head case.
BACKGROUND OF THE INVENTION
As shown in
FIG. 1
, a prior art wooden golf club head
80
is formed of a head case
81
and a ball-striking plate
82
which is joined with the head case
81
by welding such that the plate
82
is first joined with the front side of the case
81
, and that the annular line between the case
81
and the plate
82
is fused by the welding material to form an annular welded portion
83
fusing the plate
82
with the case
81
.
As shown in
FIG. 2
, another prior art wooden golf club head
85
is formed of a case
86
and a ball-striking plate
87
. The case
86
has an arcuate front edge. The plate
87
has a back whose outer peripheral portion and the case
86
form an annular groove
88
. The welding is done along the groove
88
to form a welded portion
89
of a relatively greater area and a relatively greater fusion strength.
The U.S. Pat. No. 5,871,408 issued to this inventor of the present invention discloses a wooden golf club head
90
comprising a club head case
91
and a ball-striking plate
92
fused in the recess
93
of the case
91
, as shown in FIG.
3
. The fusion portion (the wall and the bottom of the recess
93
) of the case
91
and the plate
92
is provided with a welded layer
94
which is formed by a molten welding material.
Such prior art golf club heads as described above are defective in design in that the strength of their respective fusion portion is inadequate, and that their fusion portion are apt to crack upon impact of the ball.
SUMMARY OF THE INVENTION
The primary objective of the present invention is to provide a golf club head free from the structural deficiency of the prior art golf club heads described above.
In keeping with the principle of the present invention, the foregoing objective of the present invention is attained by a golf club head comprising a head case of a metal, and a ball-striking plate of a metal. The head case has a recess extending from the front side of the case toward the rear side of the case. The ball-striking plate is joined with the head case such that the peripheral edge of the ball-striking plate is fused with the edge opening of the recess, and that the ball-striking plate is joined with the head case by a soldered layer formed by the molten hard solder, and that an annular fusion portion is formed along the line between the head case and the ball-striking plate.
REFERENCES:
patent: 5094383 (1992-03-01), Anderson
patent: 5261663 (1993-11-01), Anderson
patent: 5282624 (1994-02-01), Viste
patent: 5431396 (1995-07-01), Shieh
patent: 5433440 (1995-07-01), Lin
patent: 5518240 (1996-05-01), Igarashi
patent: 5720673 (1998-02-01), Anderson
patent: 5816936 (1998-10-01), Aizawa
patent: 5871408 (1999-02-01), Chen
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