GB2126486A - Golf club set - Google Patents
Golf club set Download PDFInfo
- Publication number
- GB2126486A GB2126486A GB08315461A GB8315461A GB2126486A GB 2126486 A GB2126486 A GB 2126486A GB 08315461 A GB08315461 A GB 08315461A GB 8315461 A GB8315461 A GB 8315461A GB 2126486 A GB2126486 A GB 2126486A
- Authority
- GB
- United Kingdom
- Prior art keywords
- hosel
- club head
- ball
- neck
- main body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
- A63B53/02—Joint structures between the head and the shaft
-
- 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
-
- 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
- A63B60/00—Details or accessories of golf clubs, bats, rackets or the like
- A63B60/54—Details or accessories of golf clubs, bats, rackets or the like with means for damping vibrations
-
- 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
- A63B53/02—Joint structures between the head and the shaft
- A63B53/021—Joint structures between the head and the shaft the shaft axis being forwardly offset relative to the striking face of the head
Abstract
In a set of correlated golf clubs, the heads 30 are provided with a narrow neck 36 connecting a main body 32 of the club head to its hosel 34. A midsection 46 of the neck 36 has a cross section of maximum dimension less than the diameter of the hose 34 so that, when the main body 32 of the club head 30 twists under impact with a ball, the narrow neck 36 will function as a torsion bar with most of the torsion occurring in the midsection 46. In that manner, the twisting motion of the main body 32 is uncoupled from the hosel 34 and shaft. <IMAGE>
Description
SPECIFICATION
Golf club set with improved off-centre impact performance
This invention relates to golf clubs of the type having iron heads for use on tees and fairways, and more particularly to an improvement in the performance of the clubs of a set in response to an off-centre impact with a golf ball.
It is now well understood that although the golfer controls the swing of a golf club head, at impact the club head behaves as though it were a free mass having a particular velocity.
Most of the energy of this mass is imparted to the ball in about half a millisecond, after which the ball compressed against the club face springs clear of it as it resumes its spherical shape.
Ideally, the centre of impact between the club head and the ball is below the centre of gravity so that the club head will twist downward during impact. This twisting increases backspin on the ball normally produced due to the loft of the club head.
To better understand the backspin normally produced on the ball, the club head should be visualized as a wedge driven between the ground and the ball, rather than as a mallet as used to strike a ball in croquet or polo. During the time the ball is in contact with the club head, the ball will tend to slide up the face of the club and friction imparts backspin which is opposite to the rotation the ball would have if it were rolling away from the golfer on the ground. Consequently, by the time the ball springs free of the club face, significant backspin has been imparted to the ball.
This backspin is desired in order to stop the ball from rolling forward on the ground once it alights, particularly when the ball alights on the green. By designing the club head so that the centre of impact will normally be below the centre of gravity, the twisting action referred to above is produced. Such twisting action adds to the backspin normally produced. However, the twisting action sometimes results in a vibration of the club head that is transferred through the shaft to "sting" the golfer's hands. Worse yet, any vibration that is set up in the club head also interferes with the normal flexing of the end of the shaft during impact. That flexing is desired because as the ball springs free of the club face, the flexed shaft straightens out to impart extra force to the ball.
It would be desirable to uncouple the twist
ing action of the club head from the shaft.
Then any vibrations of the club head will not affect the flexing of the shaft. The club head would be allowed to twist more freely for greater backspin control. This control of backspin may be achieved for each stroke by
raising or lowering the centre of impact on the club face as required.
With this in view, the present invention provides a set of correlated iron-type golf clubs, the head of each club of the set comprising a main body and a hosel for receiving a shaft, characterised in that the head comprises a narrow neck connecting said hosel to said main body, said neck being narrowest in a midsection thereof, said midsection having a maximum dimension smaller than the diameter of said hosel.
In accordance with the invention, the head of an iron golf club is uncoupled from the club shaft by a narrow neck between the main body and a hosel which connects the main body to a shaft. The neck, which is narrower at its midsection than the hosel, and of course narrower than the main body will thus function as a torsion bar to absorb the force of any twisting motion of the club head, and thus has less effect on the flexing of the club shaft.
The novel features that are considered characteristic of this invention are set forth with particularity in the appended claims.
The invention will be described further, by way of example, with reference to the accompanying drawings in which: Figure 1 is a schematic diagram which illustrates the twisting action of a conventional prior-art club head impacting a ball;
Figure 2 is a front view of the conventional prior-art club head shown in Fig. 1.
Figure 3 is a front view of a preferred embodiment of the iron club head of the present invention;
Figure 4 is a rear view of the club head shown in Fig. 3;
Figure 5 is an end view of the club head shown in Fig. 3;
Figure 6 is a plan view of the club head shown in Fig. 3 with its face in a vertical plane;
Figures 7a and 7b are front and end views respectively of a No. 2 club head of a correlated set of club heads of the present invention;
Figures 8a and 8b are front and end views respectively of a No. 5 club head of the same correlated set of club heads of the present invention; and
Figures 9a and 9b are front and end views respectively of a club head for a pitching wedge of the same correlated set of club heads of the present invention.
Referring now to Figs. 1 and 2, illustrated therein is a conventional club head 10 impact
ing a ball 1 2 with the centre of impact
between the club head 10 and ball at a point 1 4 below the centre of gravity, CG, of the club head 1 0. As the club head 10 moves into the ball 12, the ball 1 2 tends to slide up sloping face 1 5 of the club head 10, but due to friction the ball 1 2 will actually roll up, thus imparting backspin to the ball 1 2. Im
pact with the ball 1 2 also produces a clockwise twisting motion of the club head 10 about its centre of gravity as indicated, which in turn imparts a counterclockwise rotation of the ball 1 2 due to the gear effect between the club face 1 5 and the ball surface This twist of the club head 10 thus increases the backspin otherwise being imparted to the ball 1 2.
The amount of twist produced in the club head 10 is a function of how far the centre of impact is below the centre of gravity. This is a factor over which the golfer has control, and since controlled backspin is desired by the golfer, it is desirable to have the club head twist fee of the clubs shaft 1 6.
As noted hereinbefore, the lower end of the club shaft 1 6 will flex back during impact, as shown in Fig. 1, thus storing energy that is released as the ball 1 2 leaves the club head 10 and the flexed shaft 16 springs forward.
The ball 1 2 will thus leave the club head 10 not only with additional backspin due to the twisting action of the club head 10, but also with additional velocity.
Both of these effects are coupled in prior-art golf clubs (of the general configuration shown in Fig. 1) due to a thick neck 18 used to connect main body 20 of the club head 10 to a hosel 22, as illustrated more clearly in Fig.
2 which shows the club head 10 of Fig. 1 as viewed from the front. Upper edge 24 and sole 26 of the club head extend to the neck 1 8 which curves up sharply to meet the hose 22.
From the two views shown in Figs. 1 and 2, it can be seen that the neck 1 8 is purposely made very rigid. It can thus be appreciated that the main body 20 of the club head 10 (sometimes referred to hereinafter as the "club head proper") is rigidly connected to the hosel 22 by a very rigid neck 1 8. Consequently, any twisting of the club head proper will pivot the hosel 22 forward, thereby causing the shaft 1 6 to bend near the hosel 22.
In the case of impact with the ball 1 2 below the centre of gravity, the bending will be in the same direction as the flexing of the shaft 16, as illustrated in Fig. 1, but may nevertheless cause vibrations that will travel through the shaft 1 6 to the golfer's hands.
What can be worse is that twisting of the club head 10 and flexing of the shaft 1 6 may be impeded by the rigid neck 1 8 so that optimum backspin and velocity of the ball may not be achieved. In the case of impact with the ball 1 2 above the centre of gravity to produce forward or top spin of the ball 12, the club head 10 will twist in the direction opposite that shown in Fig. 1, i.e. counterclockwise, to cause the hosel 22 to pivot against the normal flexing of the shaft 18, in which case severe vibrations may be created in the club head 10 and shaft 16. The present invention uncouples the club head proper from the hosel 22 so that twisting of the club head proper will not affect the normal flexing of the shaft 16, and optimum spin (back or forward) maybe imparted to the ball 1 2.
Referring now to Figs. 3, 4 and 5, which illustrates a front, rear and end view of a club head 30 for a No. 8 iron, a main body 32 of the head 30 is connected to a hosel 34 by a narrow neck 36. An upper edge 38 extends through at least the scored portion of the club head's face and then slopes downward to merge with an upper curve 40 of the neck 36. A sole 42 extends through the length of the club head 30 and merges with a lower curve 44 of the neck 36. The upper and lower curves 40, 44 are selected to define a neck that is narrowest in a midsection 46 thereof, i.e. a cross section of the neck 36 in this midsection 46 will have a maximum dimension that is smaller than the diameter of the hosel 34.The neck 36 will thus function as a torsion bar, twisting about the centre of this midsection 46 when the main body 32 of the head 30 is twisted in one direction and the hosel 34 is not twisted, or is twisted in the opposite direction.
This torsion occurs only under the tremendous force produced by the club head 30 impacting a ball with very high velocity (about 100mph). Because of the midsection 46 has a smaller cross section than the rest of the narrow neck 36, the main body 32 of the club head 30 will twist about an axis 48 passing through the centre 47 of the midsection 46 and the centre of gravity, CG, of the club head 30. Thus, to achieve a torsion-bar effect that uncouples the twist of the main body 32 of the club head 30 from the hosel 34, the narrow neck 36 is made narrower at its midsection 40 such that its largest dimension across is less than the diameter of the hosel 34, and its smallest dimension (seen in
Fig. 6) is significantly less.
Figs, 7a, 8a and 9a illustrate respectively
No. 2, No. 5 and pitching wedge club heads of a correlated gold club set, each of which has been provided with a narrow neck as described with reference to Figs. 3 to 6 for a
No. 8 iron. Figs. 7b, 8b and 9b illustrate and views of the club heads of Figs. 7a, 8a and 9a, respectively.
Although particular embodiments of the invention have been described and illustrated herein, it is recognized that modifications and variations may readily occur to those skilled in the art. Consequently, it is intended that the claims be interpreted to cover such modifications and variations.
Claims (3)
1. A set of correlated iron-type gold clubs, the head of each club of the set comprising a
main body and a hosel for receiving a shaft,
characterised in that the head comprises a
narrow neck connecting said hosel to said
main body, said neck being narrowest in a
midsection thereof, said midsection having a maximum dimension smaller than the diameter of said hosel.
2. A set of correlated iron-type golf clubs as claimed in claim 1 wherein the head of each club has a main body, a hosel for receiving a shaft, and a neck connecting said hosel to said main body, said main body having a face for striking a ball, a sole, a toe, and an upper edge inclined upwardly from said neck to said toe, characterised in that the shape of said neck is defined by a smooth curve extending from said sole to said hosel, and a sharper curve extending from said upper edge to said hosel to define a neck having at its midsection a dimension which is smaller than the diameter of said hosel.
3. A set of correlated iron-type golf clubs substantially as hereinbefore described with reference to and as illustrated in Figs. 3 to 9b of the accompanying drawings.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US41291082A | 1982-08-30 | 1982-08-30 |
Publications (3)
Publication Number | Publication Date |
---|---|
GB8315461D0 GB8315461D0 (en) | 1983-07-13 |
GB2126486A true GB2126486A (en) | 1984-03-28 |
GB2126486B GB2126486B (en) | 1986-02-26 |
Family
ID=23634971
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB08315461A Expired GB2126486B (en) | 1982-08-30 | 1983-06-06 | Golf club set |
Country Status (6)
Country | Link |
---|---|
JP (1) | JPS5977874A (en) |
AU (1) | AU555162B2 (en) |
CA (1) | CA1204462A (en) |
DE (1) | DE3326932A1 (en) |
GB (1) | GB2126486B (en) |
ZA (1) | ZA832440B (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2176408A (en) * | 1985-06-21 | 1986-12-31 | David D Boone | Golf club head |
GB2233909A (en) * | 1989-07-17 | 1991-01-23 | Maruman Golf Kabushiki Kiasha | Golf club heads |
US6344001B1 (en) | 1997-12-18 | 2002-02-05 | Jiro Hamada | Iron golf club heads, iron golf clubs and golf club evaluating method |
US9044653B2 (en) | 2012-06-08 | 2015-06-02 | Taylor Made Golf Company, Inc. | Iron type golf club head |
US9492722B2 (en) | 2013-11-12 | 2016-11-15 | Taylor Made Golf Company, Inc. | Golf club |
US9802089B2 (en) | 2013-03-15 | 2017-10-31 | Taylor Made Golf Company, Inc | Iron type golf club head and set |
US9937395B2 (en) | 2013-11-12 | 2018-04-10 | Taylor Made Golf Company, Inc. | Golf club |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0529173Y2 (en) * | 1985-09-20 | 1993-07-27 | ||
JPS63267376A (en) * | 1987-04-25 | 1988-11-04 | 株式会社遠藤製作所 | Golf club head |
USD387830S (en) | 1996-08-23 | 1997-12-16 | Gilbert Peter J | Portion of a sole of a golf club head |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1063798A (en) * | 1964-11-28 | 1967-03-30 | Samuel Basil Roberts | Improvements in or relating to clubs for playing the game of golf |
US3884468A (en) * | 1967-10-04 | 1975-05-20 | Ray Cook Golf Putters Inc | Golf club |
GB2081106A (en) * | 1980-08-01 | 1982-02-17 | Thompson Golf Club Stan Co | Golf putters |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1639547A (en) * | 1926-10-14 | 1927-08-16 | George E Barnhart | Golf club |
US2050801A (en) * | 1933-04-06 | 1936-08-11 | Allan E Lard | Golf club |
US3970236A (en) * | 1974-06-06 | 1976-07-20 | Shamrock Golf Company | Golf iron manufacture |
-
1983
- 1983-04-07 ZA ZA832440A patent/ZA832440B/en unknown
- 1983-05-25 CA CA000428851A patent/CA1204462A/en not_active Expired
- 1983-06-06 GB GB08315461A patent/GB2126486B/en not_active Expired
- 1983-07-01 JP JP58118364A patent/JPS5977874A/en active Granted
- 1983-07-26 DE DE19833326932 patent/DE3326932A1/en active Granted
- 1983-08-25 AU AU18417/83A patent/AU555162B2/en not_active Expired
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1063798A (en) * | 1964-11-28 | 1967-03-30 | Samuel Basil Roberts | Improvements in or relating to clubs for playing the game of golf |
US3884468A (en) * | 1967-10-04 | 1975-05-20 | Ray Cook Golf Putters Inc | Golf club |
GB2081106A (en) * | 1980-08-01 | 1982-02-17 | Thompson Golf Club Stan Co | Golf putters |
Cited By (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2176408A (en) * | 1985-06-21 | 1986-12-31 | David D Boone | Golf club head |
GB2176408B (en) * | 1985-06-21 | 1989-07-26 | David D Boone | Golf club head |
GB2233909A (en) * | 1989-07-17 | 1991-01-23 | Maruman Golf Kabushiki Kiasha | Golf club heads |
GB2233909B (en) * | 1989-07-17 | 1993-11-24 | Maruman Golf Kabushiki Kiasha | Golf club heads |
US5772526A (en) * | 1989-07-17 | 1998-06-30 | Maruman Golf Kabushikikaisha | Golf club heads |
US6344001B1 (en) | 1997-12-18 | 2002-02-05 | Jiro Hamada | Iron golf club heads, iron golf clubs and golf club evaluating method |
US6344000B1 (en) | 1997-12-18 | 2002-02-05 | Jiro Hamada | Iron golf club heads, iron golf clubs and golf club evaluating method |
US6368232B1 (en) | 1997-12-18 | 2002-04-09 | Jiro Hamada | Iron golf club heads, iron golf clubs and golf club evaluating method |
US9044653B2 (en) | 2012-06-08 | 2015-06-02 | Taylor Made Golf Company, Inc. | Iron type golf club head |
US9623299B2 (en) | 2012-06-08 | 2017-04-18 | Taylor Made Golf Company, Inc. | Iron type golf club head |
US9802089B2 (en) | 2013-03-15 | 2017-10-31 | Taylor Made Golf Company, Inc | Iron type golf club head and set |
US10398950B2 (en) | 2013-03-15 | 2019-09-03 | Taylor Made Golf Company, Inc | Iron type golf club head and set |
US10888749B2 (en) | 2013-03-15 | 2021-01-12 | Taylor Made Golf Company, Inc. | Iron type golf club head and set |
US11420098B2 (en) | 2013-03-15 | 2022-08-23 | Taylor Made Golf Company, Inc. | Iron type golf club head and set |
US9492722B2 (en) | 2013-11-12 | 2016-11-15 | Taylor Made Golf Company, Inc. | Golf club |
US9937395B2 (en) | 2013-11-12 | 2018-04-10 | Taylor Made Golf Company, Inc. | Golf club |
US11141632B2 (en) | 2013-11-12 | 2021-10-12 | Taylor Made Golf Company, Inc. | Golf club |
US11801427B2 (en) | 2013-11-12 | 2023-10-31 | Taylor Made Golf Company, Inc. | Golf club |
Also Published As
Publication number | Publication date |
---|---|
CA1204462A (en) | 1986-05-13 |
JPH0220264B2 (en) | 1990-05-08 |
ZA832440B (en) | 1983-12-28 |
JPS5977874A (en) | 1984-05-04 |
GB8315461D0 (en) | 1983-07-13 |
DE3326932A1 (en) | 1984-03-08 |
AU1841783A (en) | 1984-03-08 |
AU555162B2 (en) | 1986-09-11 |
DE3326932C2 (en) | 1987-04-30 |
GB2126486B (en) | 1986-02-26 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
732 | Registration of transactions, instruments or events in the register (sect. 32/1977) | ||
PE20 | Patent expired after termination of 20 years |