WO1989012214A1 - Golf club impact recording system - Google Patents

Golf club impact recording system Download PDF

Info

Publication number
WO1989012214A1
WO1989012214A1 PCT/US1988/002599 US8802599W WO8912214A1 WO 1989012214 A1 WO1989012214 A1 WO 1989012214A1 US 8802599 W US8802599 W US 8802599W WO 8912214 A1 WO8912214 A1 WO 8912214A1
Authority
WO
WIPO (PCT)
Prior art keywords
recording medium
golf club
sheet
face
recording
Prior art date
Application number
PCT/US1988/002599
Other languages
French (fr)
Inventor
James S. Lee
Original Assignee
Lee James S
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Lee James S filed Critical Lee James S
Publication of WO1989012214A1 publication Critical patent/WO1989012214A1/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D15/00—Component parts of recorders for measuring arrangements not specially adapted for a specific variable
    • G01D15/02—Styli or other recording elements acting to mechanically deform or perforate the recording surface
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B69/00—Training appliances or apparatus for special sports
    • A63B69/36—Training appliances or apparatus for special sports for golf
    • A63B69/3617—Striking surfaces with impact indicating means, e.g. markers

Definitions

  • the present invention generally relates to ap ⁇ paratus used in playing the sport of golf and, more par- ticularly, to a system for recording the location on the head of a golf club where the golf club impacts against a golf ball.
  • the present invention is a system for recording the location on a golf club at which the golf club impacts a golf ball.
  • the system comprises a recording medium which is attachable to the head of a golf club and is removable from the golf club after impact against a golf ball.
  • a mark is made on the recording medium which records the location of impact. This mark provides the golfer with information to adjust his swing or stance if necessary in order to properly hit the golf ball with his next swing.
  • the recording medium is attached to the head of a golf club with a releasable adhesive substance to facilitate removal of the recording medium from the golf club head after one or more impacts. Prior to attaching the recording medium to the club head, the recording medium is attached to a backing material to prevent the adhesive substance of the recording medium from adhering to unintended objects.
  • a circular aperture approximating the size of a golf ball is positioned on the recording medium to allow the golf ball to impact directly against the "sweet spot" of the club head to ensure that properly executed swings are not interfered with by the recording medium.
  • FIGURE 1 is a front elevational view of a recording medium constructed according to a preferred embodiment of the present invention, as attached to the head of a golf club and bearing recordings of impacts of the club head against one or more golf balls;
  • FIGURE 2 is a front elevational view of the recording medium of FIG. 1, as attached to a sheet of backing material;
  • FIGURE 3 is a representational cross-sectional view of the recording medium and backing material of FIG. 2;
  • FIGURE 4 is a rear elevational view of the recording medium of FIGS. 1, 2 and 3;
  • FIGURE 5 is a front elevational view of a recording medium constructed according to an alternative embodiment of the present invention and attached to the head of a golf club.
  • the recording medium 10 of the preferred embodiment of the present invention is shown as attached to, and used on, the club head 20 of a golf club 25.
  • the type of club known as an "iron” is depicted.
  • the recording medium 10 of the present invention may be applied to, and used on, both “irons” and “woods” of all sizes and shapes.
  • the recording medium 10 is attached to the face of the club head 20 and records the location on the club head 20 where the golf club impacts a golf ball (not shown) .
  • a mark 30 appears on the recording medium 10 when the club head 20 impacts a golf ball and further marks 40 and 50 appear on the recording medium 10 upon subsequent impacts.
  • the center mark 30 shown in FIG. 1 indicates that the golfer swinging the golf club hit the ball at the approximate "sweet spot" of the club head 20. That is, the golfer hit the golf ball at the approximate optimum location of the club head 20 for maximum distance and control, as determined by weight, balance and overall construction and design of the golf club 25.
  • the center mark 30 provides the golfer with information indicating that one major element of his golf club swinging techni ⁇ que, that of hitting the ball at the sweet spot of the club head 20, was properly executed.
  • the marks to the left (40) and right (50) of the center mark 30 provide the golfer with information indicating that his golf club swinging technique was not properly executed when these marks were made on the recording medium 20. -The golfer can use this information to adjust his technique in order to achieve proper execution. For example, after observing that he has hit a golf ball improperly, the golfer looks at the recording medium 10 to determine the location on the club head 20 where the golf club impacted the ball. Upon inspecting the mark 40 on the recording medium 10, he realizes that he hit the ball with the outer edge of the club head 20 and can adjust his next stance or stroke to compensate for the mis-hit. The mark 40 shows the golfer not only that he hit the ball improperly with his last stroke, but also the location and distance from the sweet spot where the club head 20 struck the ball.
  • the recording medium 10 has openings 70 which provide traction to prevent the golf ball from slipping on the surface of the recording medium 10.
  • raised ridges or imprinted lines of a semi- adhesive substance may be used for this purpose. It is to be understood, however, that these embodiments are deemed preferred and do not constitute the only embodiments or preclude embodiments without openings, lines or ridges, such as a substantially smooth sheet of recording medium.
  • the recording medium 10 is attached to the club head 20 with a releasable adhesive substance (not shown) such as used with known removable labels.
  • the golfer After one or more impacts of the golf club against a golf ball have been recorded on the recording medium 10, the golfer removes the recording medium 10 from the club head in order to replace the used recording medium 10 with a fresh recording medium 10 or to use or store the golf club without a recording medium 10.
  • a portion 60 of the recording medium 10 is not provided with adhesive in order to facilitate removal of the recording medium 10 from the club head 20.
  • a unit of recording medium 10 is shown attached to a piece of backing material 80, which acts as a temporary backing prior to use of the recording medium 10 on the club head 20.
  • the backing material 80 prevents the recording medium 10 from adhering to unintended objects and permits it to be removed easily from the backing material 80 when use on the club head 20 is desired.
  • FIG. 3 is a representational cross-sectional view of the recording medium 10 attached to the backing material 80.
  • the dimensions of FIG. 3 are illustrative only and do not represent accurate proportional measure- ments.
  • the recording medium 10 is shown as a composite of three layers comprising a layer of dye capsules 102, a layer of dye co-reactants 100 and a layer of fibrous paper
  • Appleton, Wisconsin is a manufacturer of this type of paper. In operation, an impact of a golf ball against the
  • a layer of an adhesive substance 106 preferably
  • a releasable adhesive substance such as used on known removable labels, is applied to the surface of the layer of paper 104 opposite the dye co-reactant 100 and dye
  • the adhesive substance 106 is per ⁇ manently bonded to the layer of paper 104 so that it remains bonded to the paper 104 upon removal of the recording medium 10 from the backing
  • the adhesive substance 106 does not become permanently bonded to either the backing material 80 or the club head 20 when the recording medium 10 is attached to these articles, thus allowing easy removal of the recording medium 10 from the backing material 80 and the club head 20.
  • the backing material 80 is shown as a composite of two layers comprising a layer of wax 108 and a layer of fibrous paper 110.
  • the layer of wax 108 provides a relatively smooth and non-porous surface upon which to attach the recording medium 10 without creating a per ⁇ manent bond between the recording medium 10 and the backing material 80. That is, the wax layer 108 prevents the adhesive layer 106 from adhering to the layer of fibrous paper 110 of the backing material 80.
  • the recording medium 10 is attached to the backing material 80 by adhering the adhesive layer 106 of the recording medium 10 to the wax layer 108 of the backing material 80 for temporary protection of the adhesive layer 106.
  • the recording medium 10 is removed from the backing material 80 and attached to the club head 20, as shown in FIG. 1.
  • the backing material 80 may then be discarded. It is to be understood that other embodiments of backing material, including but not limited to silicone paper or a -single layer of synthetic film, are possible without departing from the scope of the present invention.
  • the adhesive substance 106 is preferrably applied to less than the entire surface of the recording medium 10, as shown in FIG. 4. That is, on the surface of the recording medium opposite the layers of dye co- reactants 100 and dye capsules 102, a portion 60 of the recording medium 10 is not covered with the adhesive substance 106 in order to ensure that this portion 60 of the recording medium 10 does not adhere to the backing material 80 or club head 20 and to provide a tab which may be pulled to initiate removal of the recording medium 10 from the backing material 80 and club head 20.
  • the adhesive substance 106 is applied to one entire surface of the recording medium 10 and a backing material (not shown) is attached to a portion of the surface of the recording medium 10 to which the adhesive substance 106 is applied.
  • FIG. 5 an alternative embodi- ent of the recording medium 10 is shown.
  • a circular aperture 140 approximating the size of a golf ball is positioned on the recording medium at the approximate location of the sweet spot of the club head 20 to which the recording medium 10 is attached.
  • This aperture 140 allows the golf ball to impact directly against the club head 20 whenever the golfer hits the ball with the sweet spot of the club head 20. Slippage of the ball or other interference that may be caused by hitting the recording medium 10 is thereby avoided, ensuring that the recording medium 10 does not interfere with properly executed swings. With this embodiment, only an improperly executed swing of a golf club will cause the recording medium 10 to impact against the ball.

Abstract

A system is disclosed for recording the location on a golf club (25) where the club head (20) impacts a golf ball. A recording medium (10) is attachable to the club head (20) prior to swinging the golf club (25) and is removable from the club head (20) after one or more impacts against the golf ball. One surface of the recording medium (10) is coated with a releasable adhesive substance (10) to permit temporary attachment of the recording medium (10) to the club head (20). A backing material (80) covers the releasable adhesive substance (104) prior to utilization of the recording medium (10) on the club head (20) to prevent the recording medium (10) from adhering to unintended objects.

Description

GO F CLUB IMPACT RECORDING SYSTEM
BACKGROUND OF THE INVENTION
The present invention generally relates to ap¬ paratus used in playing the sport of golf and, more par- ticularly, to a system for recording the location on the head of a golf club where the golf club impacts against a golf ball.
When playing golf, it is important to swing a golf club in a fashion which provides for maximum control over the direction and distance that the golf ball travels upon impact with the golf club. Several elements enter into a golfer's swinging technique, such as stance, grip, backswing, down-swing, pivoting of the body, shifting of body weight and location of impact of the golf club against the golf ball. The latter element is extremely important because the shape, weight and balance of the head of a golf club is not uniform throughout the area which may potentially strike a golf ball. Further, the distance of impact from the sweet spot of the head of the golf club will affect the direction in which the golf ball will travel.
In order to determine the location of impact of a golf club against a golf ball, golfers have generally relied upon observation of the flight of the golf ball after impact and upon the tactile sensation felt in the golfer's hands and forearms to generate a subjective impression. This method is extremely inaccurate and does not provide the golfer with sufficient information concerning the location of impact to allow him to adjust his swing to compensate for flaws in a previous swing.
Golfers have also examined the faces of their clubs after impact for some indication of the location of impact, such as dirt particles or grass stains which may have been transferred from the golf ball to the club face upon impact. This method is extremely unreliable since such dirt or grass markings are usually not made on golf clubs and when they are made, it is difficult to distin¬ guish one marking from another.
SUMMARY OF THE INVENTION
The present invention is a system for recording the location on a golf club at which the golf club impacts a golf ball. The system comprises a recording medium which is attachable to the head of a golf club and is removable from the golf club after impact against a golf ball. When the golf club bearing the recording medium strikes the golf ball, a mark is made on the recording medium which records the location of impact. This mark provides the golfer with information to adjust his swing or stance if necessary in order to properly hit the golf ball with his next swing.
The recording medium is attached to the head of a golf club with a releasable adhesive substance to facilitate removal of the recording medium from the golf club head after one or more impacts. Prior to attaching the recording medium to the club head, the recording medium is attached to a backing material to prevent the adhesive substance of the recording medium from adhering to unintended objects.
In an alternative embodiment, a circular aperture approximating the size of a golf ball is positioned on the recording medium to allow the golf ball to impact directly against the "sweet spot" of the club head to ensure that properly executed swings are not interfered with by the recording medium.
BRIEF DESCRIPTION OF THE DRAWINGS
The drawings, which constitute a part of the specification, are as follows:
FIGURE 1 is a front elevational view of a recording medium constructed according to a preferred embodiment of the present invention, as attached to the head of a golf club and bearing recordings of impacts of the club head against one or more golf balls;
FIGURE 2 is a front elevational view of the recording medium of FIG. 1, as attached to a sheet of backing material;
FIGURE 3 is a representational cross-sectional view of the recording medium and backing material of FIG. 2;
FIGURE 4 is a rear elevational view of the recording medium of FIGS. 1, 2 and 3; and
FIGURE 5 is a front elevational view of a recording medium constructed according to an alternative embodiment of the present invention and attached to the head of a golf club.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring initially to FIG. 1, the recording medium 10 of the preferred embodiment of the present invention is shown as attached to, and used on, the club head 20 of a golf club 25. For purposes of illustration, the type of club known as an "iron" is depicted. However, it is to be understood that the recording medium 10 of the present invention may be applied to, and used on, both "irons" and "woods" of all sizes and shapes.
The recording medium 10 is attached to the face of the club head 20 and records the location on the club head 20 where the golf club impacts a golf ball (not shown) . A mark 30 appears on the recording medium 10 when the club head 20 impacts a golf ball and further marks 40 and 50 appear on the recording medium 10 upon subsequent impacts.
The center mark 30 shown in FIG. 1 indicates that the golfer swinging the golf club hit the ball at the approximate "sweet spot" of the club head 20. That is, the golfer hit the golf ball at the approximate optimum location of the club head 20 for maximum distance and control, as determined by weight, balance and overall construction and design of the golf club 25. The center mark 30 provides the golfer with information indicating that one major element of his golf club swinging techni¬ que, that of hitting the ball at the sweet spot of the club head 20, was properly executed.
The marks to the left (40) and right (50) of the center mark 30 provide the golfer with information indicating that his golf club swinging technique was not properly executed when these marks were made on the recording medium 20. -The golfer can use this information to adjust his technique in order to achieve proper execution. For example, after observing that he has hit a golf ball improperly, the golfer looks at the recording medium 10 to determine the location on the club head 20 where the golf club impacted the ball. Upon inspecting the mark 40 on the recording medium 10, he realizes that he hit the ball with the outer edge of the club head 20 and can adjust his next stance or stroke to compensate for the mis-hit. The mark 40 shows the golfer not only that he hit the ball improperly with his last stroke, but also the location and distance from the sweet spot where the club head 20 struck the ball.
The recording medium 10 has openings 70 which provide traction to prevent the golf ball from slipping on the surface of the recording medium 10. In alternative embodiments, raised ridges or imprinted lines of a semi- adhesive substance may be used for this purpose. It is to be understood, however, that these embodiments are deemed preferred and do not constitute the only embodiments or preclude embodiments without openings, lines or ridges, such as a substantially smooth sheet of recording medium. The recording medium 10 is attached to the club head 20 with a releasable adhesive substance (not shown) such as used with known removable labels. After one or more impacts of the golf club against a golf ball have been recorded on the recording medium 10, the golfer removes the recording medium 10 from the club head in order to replace the used recording medium 10 with a fresh recording medium 10 or to use or store the golf club without a recording medium 10. A portion 60 of the recording medium 10 is not provided with adhesive in order to facilitate removal of the recording medium 10 from the club head 20.
Referring now to FIG. 2, a unit of recording medium 10 is shown attached to a piece of backing material 80, which acts as a temporary backing prior to use of the recording medium 10 on the club head 20. The backing material 80 prevents the recording medium 10 from adhering to unintended objects and permits it to be removed easily from the backing material 80 when use on the club head 20 is desired.
FIG. 3 is a representational cross-sectional view of the recording medium 10 attached to the backing material 80. The dimensions of FIG. 3 are illustrative only and do not represent accurate proportional measure- ments. The recording medium 10 is shown as a composite of three layers comprising a layer of dye capsules 102, a layer of dye co-reactants 100 and a layer of fibrous paper
104. This combination of elements is known as "self- 5 contained carbonless paper" and Appleton Papers, Inc. of
Appleton, Wisconsin, is a manufacturer of this type of paper. In operation, an impact of a golf ball against the
-j Q recording medium 10 causes dye capsules 102 to be crushed, further causing dye contained in the capsules to come into contact with dye co-reactants 100. A resulting chemical reaction causes the dye to change color at the location of
15 impact and creates a visible mark on the paper 104. In alternative embodiments, other materials such as textiles or synthetic materials may be substituted for the paper layer. Other embodiments of the recording media are also
20 possible without departing from the scope of the present invention.
A layer of an adhesive substance 106, preferably
25 a releasable adhesive substance such as used on known removable labels, is applied to the surface of the layer of paper 104 opposite the dye co-reactant 100 and dye
30 capsule 102 layers. The adhesive substance 106 is per¬ manently bonded to the layer of paper 104 so that it remains bonded to the paper 104 upon removal of the recording medium 10 from the backing
35 material 80, which may be waxed paper, and subsequently, upon removal of the recording medium 10 from the club head 20. However, the adhesive substance 106 does not become permanently bonded to either the backing material 80 or the club head 20 when the recording medium 10 is attached to these articles, thus allowing easy removal of the recording medium 10 from the backing material 80 and the club head 20.
The backing material 80 is shown as a composite of two layers comprising a layer of wax 108 and a layer of fibrous paper 110. The layer of wax 108 provides a relatively smooth and non-porous surface upon which to attach the recording medium 10 without creating a per¬ manent bond between the recording medium 10 and the backing material 80. That is, the wax layer 108 prevents the adhesive layer 106 from adhering to the layer of fibrous paper 110 of the backing material 80. In opera¬ tion, the recording medium 10 is attached to the backing material 80 by adhering the adhesive layer 106 of the recording medium 10 to the wax layer 108 of the backing material 80 for temporary protection of the adhesive layer 106. When use of the recording medium 10 on the club head 20 is desired, the recording medium 10 is removed from the backing material 80 and attached to the club head 20, as shown in FIG. 1. The backing material 80 may then be discarded. It is to be understood that other embodiments of backing material, including but not limited to silicone paper or a -single layer of synthetic film, are possible without departing from the scope of the present invention.
In order to facilitate easy removal of the recording medium 10 from the backing material 80 and the club head 20, the adhesive substance 106 is preferrably applied to less than the entire surface of the recording medium 10, as shown in FIG. 4. That is, on the surface of the recording medium opposite the layers of dye co- reactants 100 and dye capsules 102, a portion 60 of the recording medium 10 is not covered with the adhesive substance 106 in order to ensure that this portion 60 of the recording medium 10 does not adhere to the backing material 80 or club head 20 and to provide a tab which may be pulled to initiate removal of the recording medium 10 from the backing material 80 and club head 20. In an alternative embodiment, the adhesive substance 106 is applied to one entire surface of the recording medium 10 and a backing material (not shown) is attached to a portion of the surface of the recording medium 10 to which the adhesive substance 106 is applied.
Referring now to FIG. 5, an alternative embodi- ent of the recording medium 10 is shown. A circular aperture 140 approximating the size of a golf ball is positioned on the recording medium at the approximate location of the sweet spot of the club head 20 to which the recording medium 10 is attached. This aperture 140 allows the golf ball to impact directly against the club head 20 whenever the golfer hits the ball with the sweet spot of the club head 20. Slippage of the ball or other interference that may be caused by hitting the recording medium 10 is thereby avoided, ensuring that the recording medium 10 does not interfere with properly executed swings. With this embodiment, only an improperly executed swing of a golf club will cause the recording medium 10 to impact against the ball.
The foregoing description of the preferred embodiments are illustrative of the best modes presently contemplated by the inventor for embodying the present invention. It is to be understood, however, that other embodiments are possible without departing from the scope and spirit of the present invention, as claimed below.

Claims

I CLAIM:
1. Apparatus for recording the location on the head of a golf club at which the golf club impacts a golf ball in the course of a swing, comprising: a recording medium attachable to the face of a golf club, the recording medium being removable from the face of the golf club after at least one impact.
2. Apparatus according to claim 1, wherein: the recording medium has a coating of a releasable adhesive substance for attachment to the head of the golf club.
3. Apparatus according to claim 2, wherein: the recording medium comprises a sheet of recording material having two sides; and the adhesive coating is applied to less than the entire surface of one said sides.
4. Apparatus according to claim 1, wherein: the recording medium comprises a sheet of paper having a plurality of fibers.
5. Apparatus according to claim 4, wherein: the recording medium further comprises a substance which changes color upon the application of pressure thereto, said substance being distributed throughout the fibers on one surface of the sheet of paper.
6. Apparatus according to claim 1, wherein: the recording medium is self-contained carbonless paper.
7. Apparatus according to claim 1, wherein: the recording medium comprises a synthetic film.
8. Apparatus according to claim 7, wherein: the recording medium further comprises a substance which changes color upon the application of pressure thereto, said substance being distributed throughout the thickness of one surface of the synthetic film.
9. Apparatus according to claim 1, wherein: the recording medium comprises a sheet of textile fabric having a plurality of fibers.
10. Apparatus according to claim 9, wherein: the recording medium further comprises a substance which changes color upon the application of pressure thereto, said substance being distributed throughout the fibers of one surface of the sheet of textile fabric.
11. Apparatus according to claim 1 comprising: a recording medium comprising a sheet of recording material having two opposed surfaces; a releasable adhesive substance applied to one of said surfaces; and a removable backing sheet disposed over the adhesive coating to protect the adhesive coating before the recording medium is attached to the golf club.
12. Apparatus according to claim 11, wherein: the backing medium comprises a sheet of waxed paper.
13. Apparatus according to claim 1, wherein: the recording medium is shaped to cover substantially the entire surface of the face of the golf club.
14. Apparatus according to claim 1, wherein: the recording medium is similar in shape to the face of the golf club.
15. Apparatus according to claim 1, wherein: the recording medium is adapted to cover a
3 plurality of differently shaped faces of golf clubs.
1 16. Apparatus according to claim 1, wherein:
2 the recording medium contains a plurality
3 of openings.
--_
17. Apparatus according to claim 1, wherein:
2 the recording medium contains a circular
3 aperture to avoid covering the sweet spot on the face of
4 the golf club.
•i
18. Apparatus for recording the location on the
2 face of a golf club where said golf club impacts against a
3 golf ball, comprising:
. a sheet of recording material responsive to c the localized application of pressure; and 6 means for affixing the sheet of recording
_ material to the face of a golf club, said affixing means
0 being a coating of a releasable adhesive on one surface of α said sheet.
1 19. Apparatus according to claim 18, further
2 comprising: backing means for preventing the sheet of recording material from becoming affixed unintentionally to an object, the backing means being temporarily attached to the affixing means and removable therefrom when desired.
20. A method for recording the location on the face of a golf club at which the golf club impacts a golf ball in the course of a swing, comprising the steps of: securing a sheet of recording material having a coating of a releasable adhesive on one surface thereof; aligning the sheet with the face of a golf club so that the adhesive coating is directed toward said face; and affixing the sheet of recording material to the face of the golf club by pressing the sheet there- against.
21. A method according to claim 20, further comprising the steps of: swinging the golf club so that the sheet of recording material affixed to the fact impacts a golf ball; examining the sheet of recording material after impact; and removing the sheet of recording material from the face of the golf club.
22. A method according to claim 20, further comprising the step of: removing a backing medium from the sheet of recording material before affixing said sheet to the face of the golf club.
PCT/US1988/002599 1988-06-09 1988-07-28 Golf club impact recording system WO1989012214A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US20465688A 1988-06-09 1988-06-09
US204,656 1988-06-09

Publications (1)

Publication Number Publication Date
WO1989012214A1 true WO1989012214A1 (en) 1989-12-14

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ID=22758866

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1988/002599 WO1989012214A1 (en) 1988-06-09 1988-07-28 Golf club impact recording system

Country Status (2)

Country Link
AU (1) AU2625488A (en)
WO (1) WO1989012214A1 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0445716A1 (en) * 1990-03-07 1991-09-11 Deutsche Aerospace AG Method for locating impact points on composites
GB2252839A (en) * 1991-02-12 1992-08-19 Scimat Ltd Recording medium
DE10227895A1 (en) * 2002-06-21 2004-01-08 Werner Schelling Fibre structure for tennis court surfaces enables detecting spot at which ball hits court in contentious cases as pressure of ball leaves impression on fibre pile
FR2854332A1 (en) 2003-05-02 2004-11-05 Annie Christine Abrassart Marking device for marking position of point of hit on golf ball, has applicator with marking material which is transferred on ball before striking and finding itself in position of point of hit by golf club on ball after striking
GB2448382A (en) * 2007-04-13 2008-10-15 Karsten Mfg Coporation Apparatus, method and impact indicator to indicate impact of an object.
KR101979426B1 (en) * 2018-01-15 2019-05-16 장만석 Apparatus for marking the golf ball stroke point
CN116157185A (en) * 2020-07-14 2023-05-23 金志勋 Golf club indicator assembly capable of checking swing track

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3754764A (en) * 1972-04-27 1973-08-28 F Manheck Golf club impact marker
US3806132A (en) * 1972-08-10 1974-04-23 J Brandell Golf practice aids
US4676508A (en) * 1986-02-14 1987-06-30 Dilny Mike M Method and means for determining golf ball impact

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3754764A (en) * 1972-04-27 1973-08-28 F Manheck Golf club impact marker
US3806132A (en) * 1972-08-10 1974-04-23 J Brandell Golf practice aids
US4676508A (en) * 1986-02-14 1987-06-30 Dilny Mike M Method and means for determining golf ball impact

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0445716A1 (en) * 1990-03-07 1991-09-11 Deutsche Aerospace AG Method for locating impact points on composites
GB2252839A (en) * 1991-02-12 1992-08-19 Scimat Ltd Recording medium
GB2252838A (en) * 1991-02-12 1992-08-19 Scimat Ltd Heat- or pressure-sensitive recording medium
DE10227895A1 (en) * 2002-06-21 2004-01-08 Werner Schelling Fibre structure for tennis court surfaces enables detecting spot at which ball hits court in contentious cases as pressure of ball leaves impression on fibre pile
FR2854332A1 (en) 2003-05-02 2004-11-05 Annie Christine Abrassart Marking device for marking position of point of hit on golf ball, has applicator with marking material which is transferred on ball before striking and finding itself in position of point of hit by golf club on ball after striking
GB2448382A (en) * 2007-04-13 2008-10-15 Karsten Mfg Coporation Apparatus, method and impact indicator to indicate impact of an object.
US8092315B2 (en) 2007-04-13 2012-01-10 Karsten Manufacturing Corporation Methods and apparatus to indicate impact of an object
GB2448382B (en) * 2007-04-13 2012-07-11 Karsten Mfg Corp Methods and apparatus to indicate impact of an object
KR101979426B1 (en) * 2018-01-15 2019-05-16 장만석 Apparatus for marking the golf ball stroke point
CN116157185A (en) * 2020-07-14 2023-05-23 金志勋 Golf club indicator assembly capable of checking swing track

Also Published As

Publication number Publication date
AU2625488A (en) 1990-01-05

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