US20010041625A1 - Iron golf club set - Google Patents

Iron golf club set Download PDF

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Publication number
US20010041625A1
US20010041625A1 US09/372,974 US37297499A US2001041625A1 US 20010041625 A1 US20010041625 A1 US 20010041625A1 US 37297499 A US37297499 A US 37297499A US 2001041625 A1 US2001041625 A1 US 2001041625A1
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United States
Prior art keywords
club
iron golf
clubs
iron
face
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Abandoned
Application number
US09/372,974
Inventor
Tokuo Satoh
Hiroshi Ishikawa
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Ryobi Ltd
Original Assignee
Ryobi Ltd
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Assigned to RYOBI LIMITED reassignment RYOBI LIMITED ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ISHIKAWA, HIROSHI, SATOH, TOKUO
Publication of US20010041625A1 publication Critical patent/US20010041625A1/en
Abandoned legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B53/00—Golf clubs
    • A63B53/04—Heads
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B60/00—Details or accessories of golf clubs, bats, rackets or the like
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B53/00—Golf clubs
    • A63B53/005—Club sets
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B53/00—Golf clubs
    • A63B53/04—Heads
    • A63B53/047—Heads iron-type
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B53/00—Golf clubs
    • A63B53/04—Heads
    • A63B53/0408—Heads characterised by specific dimensions, e.g. thickness

Definitions

  • an iron golf club set is composed of a plurality of iron golf clubs having respective club numbers different from each other.
  • the iron golf club set is composed for example of 10 clubs, i.e., seven iron clubs of No. 3 to No. 9 and three wedge clubs of a pitching wedge, an approach wedge and a sand wedge.
  • a face progression of each of these iron golf clubs has an influence on a trajectory of a golf ball hit by the golf club.
  • the face progression means a horizontal distance FP between a leading edge 5 and a vertical plane P, which faces in a flying direction of the golf ball hit by the iron golf club and passes the central axial line of a hosel 3 .
  • FIG. 4 is a graph illustrating a relationship between the numbered clubs of the conventional iron golf club set with their face progressions.
  • An abscissa of the graph represents a number of the club and an ordinate represents a value of face progression.
  • “X” indicates a straight line connecting values of face progression of the respective numbered clubs of the conventional iron golf club set (hereinafter referred to as the “prior art 1”) and “Y” indicates another straight line connecting values of face progression of the respective numbered clubs of the other conventional iron golf club set (hereinafter referred to as the “prior art 2”).
  • the face progressions of the respective numbered clubs which are kept constant as a small value make the higher lofted irons relatively easier to use for hitting the golf ball, but make the lower lofted irons harder to use for hitting it, thus requiring a skilful technique for using such lower lofted irons efficiently.
  • the face progressions of the respective numbered clubs which are kept constant as a large value make the lower lofted irons relatively easier to use for hitting the golf ball, but make the higher lofted irons harder to use for hitting it, thus requiring a skilful technique for using such higher lofted irons efficiently.
  • the lower lofted irons which have a small value of the face progression, make it hard to increase the trajectory of the resultant ball flight after being hit by the club. More specifically, when the face progression of the lower lofted iron is kept small in this manner, a golf club tends to be a so-called “gooseneck” shape. As a result, when a golf player hits a golf ball with the use of such a lower lofted iron, he has to place the golf ball near the intermediate position between the both feet.
  • the above-described placement of the golf ball causes the inclination angle of the face of the golf club relative to the horizontal standard plane to increase so as to be in a so-called “closed face” condition, making it hard to increase the trajectory of the resultant ball flight after being hit by the club.
  • An object of the present invention is therefore to provide an iron golf club set, which makes it possible to increase easily the trajectory of the resultant ball flight after being hit with the use of any one of numbered clubs, especially a numbered club having a lower loft angle.
  • an iron golf club set of the present invention comprises:
  • face progressions of said iron golf clubs become gradually smaller from a club having a smallest club number toward an other club having a largest club number in at least one group comprising a series of consecutively numbered clubs of said plurality of iron golf clubs.
  • a reduction ratio in the face progressions of the iron golf clubs may be expressed by a straight line.
  • a reduction ratio in the face progressions of the iron golf clubs may be expressed by a curved line.
  • the face progressions of all of said iron golf clubs may become gradually smaller from the club having the smallest club number toward the other club having the largest club number.
  • the plurality of iron golf clubs may be used for a right-handed golf player.
  • the plurality of iron golf clubs may be used for a left-handed golf player.
  • FIG. 1 is a partial front view illustrating one of a plurality of iron golf clubs forming an iron golf club set of the present invention
  • FIG. 2 is a side view of the iron golf club as shown in FIG. 1;
  • FIG. 3 is a graph illustrating a relationship between numbered clubs of the iron golf club set of the present invention with their face progressions.
  • FIG. 4 is a graph illustrating a relationship between numbered clubs of the iron golf club sets of the prior arts 1 and 2 with their face progression.
  • the iron golf club set of the present invention is composed of 10 clubs, i.e., seven iron clubs of No. 3 to No. 9 and three wedge clubs of a pitching wedge, an approach wedge and a sand wedge.
  • Each of these clubs is composed of a shaft S, a head H fixed to the front end of the shaft S and a grip (not shown) fixed to the rear end of the shaft S as shown in FIG. 1.
  • the head H is provided with a face 1 , a sole 2 , a hosel 3 and a back face 4 .
  • FIG. 3 is a graph illustrating a relationship between the numbered clubs of the iron golf club set of the present invention with their face progressions.
  • An abscissa of the graph represents a number of the club and an ordinate represents a value of face progression FP.
  • the face progressions FP of the iron golf clubs become gradually smaller from the iron golf club No. 3 toward the iron golf club No. 9, respectively.
  • a linear line having a minus slope as shown in FIG. 3 can express a rate of change in face progression.
  • the face progressions FP of the remaining three clubs, i.e., the pitching wedge, the approach wedge and the sand wedge are kept constant.
  • the face progressions FP of the seven iron golf clubs of No. 3 to No. 9 gradually decrease from 11 mm to 5 mm in this numbering order.
  • the face progressions FP of the three wedge clubs, i.e., the pitching wedge, the approach wedge and the sand wedge are kept constant as the same value of 5 mm as the value of the face progression of the iron golf club No. 9.
  • the iron golf club No. 3 serving as the low lofted iron has, for example, the face progression FP of 11 mm and the iron golf club No. 9 serving as the high lofted iron has the face progression FP of 5 mm, and the former face progression is remarkably larger than the latter face progression.
  • the iron golf club No. 3 serving as the low lofted iron has, for example, the face progression FP of 11 mm and the iron golf club No. 9 serving as the high lofted iron has the face progression FP of 5 mm, and the former face progression is remarkably larger than the latter face progression.
  • the iron golf club No. 6 serving as the middle-lofted iron has, for example, the face progression FP of 8 mm and the iron golf club No. 9 serving as the high lofted iron has the face progression FP of 5 mm, and the former face progression is larger than the latter face progression.
  • a golf player it is possible for a golf player to place, in the same manner as described above, a golf ball in position, which is shifted toward its flying direction from the intermediate position between his feet so as to hit the golf ball in a sweeping motion with the use of the middle-lofted iron, irrespective of its relatively low loft angle. It is therefore possible to increase the trajectory of the resultant ball flight after being hit by the club, even when the golf player uses the middle-lofted iron.
  • the high lofted irons such as the iron golf club No. 9 have a loft angle of at least 38 degrees. As a result, it is relatively easy to increase the trajectory of the resultant ball flight after being hit by the club.
  • the face progressions FP of the iron golf clubs become gradually smaller from the iron golf club No. 3 serving as the club having the smallest club number toward the iron golf club No. 9 serving as the other club having the largest club number in a series of consecutively numbered clubs of the plurality of iron golf clubs, i.e., in the seven iron golf clubs No. 3 to No. 9.
  • the number of clubs forming the series of consecutively numbered clubs may optionally be changed.
  • the face progressions FP of the iron golf clubs may become gradually smaller from the iron golf club No. 3 toward the iron golf club No. 8 for example in the six iron golf clubs No. 3 to No. 8.
  • the face progressions FP of the iron golf clubs may become gradually smaller from the club having the smallest club number toward the other club having the largest club number in all the plurality of iron golf clubs of the iron golf club set of the present invention.
  • the above-described iron golf club set of the present invention has a reduction ratio in face progressions of the iron golf clubs, which can be expressed by a straight line as shown in FIG. 3.
  • the iron golf club set of the present invention may have a reduction ratio in face progressions of the iron golf clubs, which can be expressed by a curved line.
  • the iron golf club set of the present invention is described to be used for a right-handed golf player.
  • the present invention may be applied to the iron golf club set, which is used for a left-handed golf player.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Golf Clubs (AREA)

Abstract

An iron golf club set comprises a plurality of iron golf clubs having respective club numbers different from each other. Face progressions of the iron golf clubs become gradually smaller from the club having the smallest club number toward the other club having the largest club number in at least one group comprising a series of consecutively numbered clubs of the plurality of iron golf clubs.

Description

    BACKGROUND OF THE INVENTION
  • 1. Field of the Invention [0001]
  • The present invention relates to an iron golf club set. Description of the Related Art In general, an iron golf club set is composed of a plurality of iron golf clubs having respective club numbers different from each other. The iron golf club set is composed for example of 10 clubs, i.e., seven iron clubs of No. 3 to No. 9 and three wedge clubs of a pitching wedge, an approach wedge and a sand wedge. [0002]
  • A face progression of each of these iron golf clubs has an influence on a trajectory of a golf ball hit by the golf club. Here, as shown in FIG. 2 illustrating a single iron golf club of the iron golf club set of the present invention, the face progression means a horizontal distance FP between a leading [0003] edge 5 and a vertical plane P, which faces in a flying direction of the golf ball hit by the iron golf club and passes the central axial line of a hosel 3.
  • Description will be given below of a face progression of each of the numbered clubs of the conventional iron golf club set with reference to FIG. 4. FIG. 4 is a graph illustrating a relationship between the numbered clubs of the conventional iron golf club set with their face progressions. An abscissa of the graph represents a number of the club and an ordinate represents a value of face progression. In FIG. 4, “X” indicates a straight line connecting values of face progression of the respective numbered clubs of the conventional iron golf club set (hereinafter referred to as the “[0004] prior art 1”) and “Y” indicates another straight line connecting values of face progression of the respective numbered clubs of the other conventional iron golf club set (hereinafter referred to as the “prior art 2”).
  • As is clear from FIG. 4, in the [0005] prior art 1, the face progressions of the respective numbered clubs of 10 iron golf clubs are kept constant. On the contrary, in the prior art 2, the face progressions of the iron golf clubs become gradually larger from a club having the smallest club number, i.e., the lowest lofted iron toward the other club having the largest club number, i.e., the highest lofted iron.
  • However, in the [0006] prior art 1, the face progressions of the respective numbered clubs, which are kept constant as a small value make the higher lofted irons relatively easier to use for hitting the golf ball, but make the lower lofted irons harder to use for hitting it, thus requiring a skilful technique for using such lower lofted irons efficiently. On the contrary, the face progressions of the respective numbered clubs, which are kept constant as a large value make the lower lofted irons relatively easier to use for hitting the golf ball, but make the higher lofted irons harder to use for hitting it, thus requiring a skilful technique for using such higher lofted irons efficiently.
  • In the prior art 2, the lower lofted irons, which have a small value of the face progression, make it hard to increase the trajectory of the resultant ball flight after being hit by the club. More specifically, when the face progression of the lower lofted iron is kept small in this manner, a golf club tends to be a so-called “gooseneck” shape. As a result, when a golf player hits a golf ball with the use of such a lower lofted iron, he has to place the golf ball near the intermediate position between the both feet. The above-described placement of the golf ball causes the inclination angle of the face of the golf club relative to the horizontal standard plane to increase so as to be in a so-called “closed face” condition, making it hard to increase the trajectory of the resultant ball flight after being hit by the club. [0007]
    • SUMMARY OF THE INVENTION
  • An object of the present invention is therefore to provide an iron golf club set, which makes it possible to increase easily the trajectory of the resultant ball flight after being hit with the use of any one of numbered clubs, especially a numbered club having a lower loft angle. [0008]
  • In order to attain the aforementioned object, an iron golf club set of the present invention comprises: [0009]
  • a plurality of iron golf clubs having respective club numbers different from each other, [0010]
  • wherein: [0011]
  • face progressions of said iron golf clubs become gradually smaller from a club having a smallest club number toward an other club having a largest club number in at least one group comprising a series of consecutively numbered clubs of said plurality of iron golf clubs. [0012]
  • A reduction ratio in the face progressions of the iron golf clubs may be expressed by a straight line. [0013]
  • A reduction ratio in the face progressions of the iron golf clubs may be expressed by a curved line. [0014]
  • The face progressions of all of said iron golf clubs may become gradually smaller from the club having the smallest club number toward the other club having the largest club number. [0015]
  • The plurality of iron golf clubs may be used for a right-handed golf player. [0016]
  • The plurality of iron golf clubs may be used for a left-handed golf player.[0017]
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • FIG. 1 is a partial front view illustrating one of a plurality of iron golf clubs forming an iron golf club set of the present invention; [0018]
  • FIG. 2 is a side view of the iron golf club as shown in FIG. 1; [0019]
  • FIG. 3 is a graph illustrating a relationship between numbered clubs of the iron golf club set of the present invention with their face progressions; and [0020]
  • FIG. 4 is a graph illustrating a relationship between numbered clubs of the iron golf club sets of the [0021] prior arts 1 and 2 with their face progression.
    • DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
  • Now, an embodiment of an iron golf club set of the present invention will be described in detail below with reference to FIGS. [0022] 1 to 3.
  • The iron golf club set of the present invention is composed of 10 clubs, i.e., seven iron clubs of No. 3 to No. 9 and three wedge clubs of a pitching wedge, an approach wedge and a sand wedge. [0023]
  • Each of these clubs is composed of a shaft S, a head H fixed to the front end of the shaft S and a grip (not shown) fixed to the rear end of the shaft S as shown in FIG. 1. The head H is provided with a [0024] face 1, a sole 2, a hosel 3 and a back face 4.
  • The face progressions FP (see FIG. 2) of the iron golf clubs become gradually smaller from an iron golf club No. 3 serving as a club having the smallest club number toward an iron golf club No. 9 serving as the other club having the largest club number in a series of consecutively numbered clubs of the above-mentioned plurality of iron golf clubs, i.e., in the seven iron golf clubs No. 3 to No. 9. FIG. 3 is a graph illustrating a relationship between the numbered clubs of the iron golf club set of the present invention with their face progressions. An abscissa of the graph represents a number of the club and an ordinate represents a value of face progression FP. [0025]
  • As is clear from FIG. 3, the face progressions FP of the iron golf clubs become gradually smaller from the iron golf club No. 3 toward the iron golf club No. 9, respectively. A linear line having a minus slope as shown in FIG. 3 can express a rate of change in face progression. The face progressions FP of the remaining three clubs, i.e., the pitching wedge, the approach wedge and the sand wedge are kept constant. [0026]
  • Below is a table showing the relationship between the numbered clubs of the iron golf club set of the present invention, their loft angles L (see FIG. 2) and their face progressions FP. [0027]
    TABLE 1
    Numbered
    club
    3 4 5 6 7 8 9 PW AW SW
    Loft 19 22 25 28 31 34 38 43 49 55
    angle
    (degrees)
    Face 11 10 9 8 7 6 5 5 5 5
    progres-
    sion (mm)
  • As shown in Table 1, the face progressions FP of the seven iron golf clubs of No. 3 to No. 9 gradually decrease from 11 mm to 5 mm in this numbering order. The face progressions FP of the three wedge clubs, i.e., the pitching wedge, the approach wedge and the sand wedge are kept constant as the same value of 5 mm as the value of the face progression of the iron golf club No. 9. [0028]
  • According to the present invention described above, the iron golf club No. 3 serving as the low lofted iron has, for example, the face progression FP of 11 mm and the iron golf club No. 9 serving as the high lofted iron has the face progression FP of 5 mm, and the former face progression is remarkably larger than the latter face progression. As a result, it is possible for a golf player to place a golf ball in position, which is shifted toward its flying direction from the intermediate position between his feet so as to hit the golf ball in a sweeping motion with the use of the low lofted iron, irrespective of its low loft angle. It is therefore possible to increase the trajectory of the resultant ball flight after being hit by the club so as to impart specific properties to stop and stay easily on a putting green, even when the golf player uses the low lofted iron. [0029]
  • The iron golf club No. 6 serving as the middle-lofted iron has, for example, the face progression FP of 8 mm and the iron golf club No. 9 serving as the high lofted iron has the face progression FP of 5 mm, and the former face progression is larger than the latter face progression. As a result, it is possible for a golf player to place, in the same manner as described above, a golf ball in position, which is shifted toward its flying direction from the intermediate position between his feet so as to hit the golf ball in a sweeping motion with the use of the middle-lofted iron, irrespective of its relatively low loft angle. It is therefore possible to increase the trajectory of the resultant ball flight after being hit by the club, even when the golf player uses the middle-lofted iron. [0030]
  • The high lofted irons such as the iron golf club No. 9 have a loft angle of at least 38 degrees. As a result, it is relatively easy to increase the trajectory of the resultant ball flight after being hit by the club. [0031]
  • In the above-described embodiment of the present invention, the face progressions FP of the iron golf clubs become gradually smaller from the iron golf club No. 3 serving as the club having the smallest club number toward the iron golf club No. 9 serving as the other club having the largest club number in a series of consecutively numbered clubs of the plurality of iron golf clubs, i.e., in the seven iron golf clubs No. 3 to No. 9. The number of clubs forming the series of consecutively numbered clubs may optionally be changed. The face progressions FP of the iron golf clubs may become gradually smaller from the iron golf club No. 3 toward the iron golf club No. 8 for example in the six iron golf clubs No. 3 to No. 8. [0032]
  • The face progressions FP of the iron golf clubs may become gradually smaller from the club having the smallest club number toward the other club having the largest club number in all the plurality of iron golf clubs of the iron golf club set of the present invention. [0033]
  • The above-described iron golf club set of the present invention has a reduction ratio in face progressions of the iron golf clubs, which can be expressed by a straight line as shown in FIG. 3. The iron golf club set of the present invention may have a reduction ratio in face progressions of the iron golf clubs, which can be expressed by a curved line. [0034]
  • The iron golf club set of the present invention is described to be used for a right-handed golf player. The present invention may be applied to the iron golf club set, which is used for a left-handed golf player. [0035]
  • According to the present invention as described in detail, since face progressions of the iron golf clubs become gradually smaller from a club having the smallest club number toward the other club having the largest club number in at least one group comprising a series of consecutively numbered clubs of the plurality of iron golf clubs, it is possible to increase the trajectory of the resultant ball flight after being hit with the use of any one of numbered clubs, especially a numbered club having a lower loft angle. [0036]

Claims (6)

What is claimed is:
1. An iron golf club set, which comprises:
a plurality of iron golf clubs having respective club numbers different from each other,
wherein:
face progressions of said iron golf clubs become gradually smaller from a club having a smallest club number toward an other club having a largest club number in at least one group comprising a series of consecutively numbered clubs of said plurality of iron golf clubs.
2. The iron golf club set as claimed in
claim 1
, wherein:
a reduction ratio in the face progressions of the iron golf clubs can be expressed by a straight line.
3. The iron golf club set as claimed in
claim 1
, wherein:
a reduction ratio in the face progressions of the iron golf clubs can be expressed by a curved line.
4. The iron golf club set as claimed in
claim 1
, wherein:
the face progressions of all of said iron golf clubs become gradually smaller from the club having the smallest club number toward the other club having the largest club number.
5. The iron golf club set as claimed in
claim 1
, wherein:
said plurality of iron golf clubs is to be used for a right-handed golf player.
6. The iron golf club set as claimed in
claim 1
, wherein:
said plurality of iron golf clubs is to be used for a left-handed golf player.
US09/372,974 1998-09-18 1999-08-12 Iron golf club set Abandoned US20010041625A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JPP10-265501 1998-09-18
JP10265501A JP2000093560A (en) 1998-09-18 1998-09-18 Iron golf club set

Publications (1)

Publication Number Publication Date
US20010041625A1 true US20010041625A1 (en) 2001-11-15

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JP (1) JP2000093560A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8070621B2 (en) 2008-04-01 2011-12-06 Sri Sports Limited Golf club set
US20120220388A1 (en) * 2011-02-25 2012-08-30 Donald B. Fisher Golf club wedge head
US20150375067A1 (en) * 2014-06-26 2015-12-31 Dunlop Sports Co. Ltd. Golf club and golf club set
US9861865B1 (en) * 2014-12-24 2018-01-09 Taylor Made Golf Company, Inc. Hollow golf club head with step-down crown and shroud forming second cavity

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6219108B2 (en) * 2013-09-25 2017-10-25 ダンロップスポーツ株式会社 Golf club set

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8070621B2 (en) 2008-04-01 2011-12-06 Sri Sports Limited Golf club set
US20120220388A1 (en) * 2011-02-25 2012-08-30 Donald B. Fisher Golf club wedge head
US20150375067A1 (en) * 2014-06-26 2015-12-31 Dunlop Sports Co. Ltd. Golf club and golf club set
US9861865B1 (en) * 2014-12-24 2018-01-09 Taylor Made Golf Company, Inc. Hollow golf club head with step-down crown and shroud forming second cavity
US10688351B2 (en) 2014-12-24 2020-06-23 Taylor Made Golf Company, Inc. Golf club head

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Owner name: RYOBI LIMITED, JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SATOH, TOKUO;ISHIKAWA, HIROSHI;REEL/FRAME:010171/0322

Effective date: 19990806

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION