Games using tangible projectile – Golf – Club or club support
Reexamination Certificate
1998-11-09
2001-02-27
Passaniti, Sebastiano (Department: 3711)
Games using tangible projectile
Golf
Club or club support
C473S331000, C473S332000, C473S350000
Reexamination Certificate
active
06193615
ABSTRACT:
CROSS-REFERENCE TO RELATED APPLICATIONS
Not Applicable.
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT
Not Applicable.
REFERENCE TO A MICROFICHE APPENDIX
Not Applicable.
BACKGROUND OF THE INVENTION
1. Technical Field
This invention relates to a head of golf clubs that is able to spin a ball more when hitting the ball in the rough etc.
2. Description of the Related Art
Many grooves are carved on a clubface in order to spin a ball enough even when substances such as grass or moisture lie between the ball and the clubface.
However, enough backspin is not produced in the rough etc. actually, the ball flies to unexpected longer distance or does not stop on the green (i.e. so-called “flyer phenomenon” occurs), and it annoys golfers.
Accordingly the golf club that is able to spin a ball more even in such a situation is requested. But any effective methods are not suggested yet.
BRIEF SUMMARY OF THE INVENTION
In this invention, a front face part of a head is made thin plate-shape and a gap (space) is established between the front face part and a head main body, and the front face part is combined with thin rib-shaped members only to the rear of the front surface portions of the front face part where the grooves are located and the other ends of the rib-shaped members are combined with the head main body.
If such a structure is adopted in a head of golf clubs, stiffiess of the vicinity of the grooves is very high and of the other part is very low. Therefore, when hitting a ball in the rough etc., pressures acting on the vicinity of the grooves are very high and on the other parts are very low. Consequently, edges of the grooves cut off the grass etc. and dig into the ball, then more backspin is produced.
REFERENCES:
patent: 1854548 (1932-04-01), Hunt
patent: 2034936 (1936-03-01), Barnhart
patent: 3061310 (1962-10-01), Giza
patent: 3556532 (1971-01-01), Ballmer
patent: 4398965 (1983-08-01), Campau
patent: 5358249 (1994-10-01), Mendralla
patent: 5499814 (1996-03-01), Lu
patent: 5681227 (1997-10-01), Sayrizi
patent: 5766092 (1998-06-01), Mimeur
patent: 5766094 (1998-06-01), Mahaffey
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