EP1804933B1

EP1804933B1 - Putting practice device

Info

Publication number: EP1804933B1
Application number: EP05789500A
Authority: EP
Inventors: Mark Andrew Allen; Stephen Brice Lister
Original assignee: D&B Wholesale Pty Ltd
Current assignee: D&B Wholesale Pty Ltd
Priority date: 2004-09-28
Filing date: 2005-09-27
Publication date: 2011-04-06
Anticipated expiration: 2025-09-27
Also published as: ES2365477T3; DE602005027375D1; AU2005289370B2; EP1804933A1; KR101243067B1; WO2006034543A1; JP4644255B2; JP2008514313A; ATE504338T1; EP1804933A4; KR20070073811A; AU2005289370A1; US20120040768A1

Abstract

There is disclosed a practice putting apparatus. The practice putting apparatus has a putting target, and a light source for lighting a guide path on a practice surface, the guide path being parallel to a putting line along which a golf ball is intended to be struck at said target to thereby provide a visual aid to alignment of the putter head when making a putting stroke along the putting line.

Description

Field of the Invention

The present invention relates to a golf putting practice device.

Background to the Invention

There are a number of variables involved in putting in the game of golf. Typically, the golfer first chooses a putting line along which to putt by assessing the slope of the green to determine what "borrow" is necessary so that if the putting line is predicted correctly and the ball is struck along the putting line at the correct pace, the ball will travel from where it is located on the green into the hole. The putting line is determined by a number of factors including the severity of slopes on the green and the speed of the green. Assuming the golfer is able to determine the correct putting line, the golfer must also strike the golf ball along the right putting line. To do so, the planar surface of the putter club head must be substantially perpendicular (or "square") to the putting line on which the golfer strikes the ball when the ball is struck and the putter club head must be moving substantially along the putting line. For example, in the case of a straight putt where there is no borrow, the putting line will extend directly from the centre of the golf ball to the hole. If the ball is struck along the putting line, the ball should go in the hole. However, if it is not struck along the correct line it will miss the hole. The necessary degree of alignment of the putter depends on the length of the putt and it will be appreciated that as the putt gets longer alignment of the putter correctly becomes more important.
It will be appreciated that the mechanics of the human body are such that any club that is swung will tend to move in an arc around the player's body an hence, depending on the length of the player's back swing, will tend to move off the putting line. In order to strike the ball correctly, the player needs to have the club face square and the putting club travelling along the putting line.
It is not legal in golf to make any lines or marks on the green in order to aid in putting. Accordingly, it is necessary for golfers to practice their alignment if they wish to improve their putting. Putting is an activity that does not require much special equipment in order to be practiced and it can be practiced on practice surfaces such as floors that have an appropriate floor covering such as carpet. Typically when practicing golf, the golfer practices by aiming at a target.
It would be advantageous to provide a golf putting practice apparatus that enabled the user to practice alignment of the putter club head.
US-B1-6 213 887 discloses a practice putting device with a single laser light.
US-A-3 009 704 describes a golf training device where two neon lights are mounted above a putting surface to either side of a putting station so as to provide parallel lines to the intended putting line. The neon lights are arranged, as seen from the target, behind the putting station.

Summary of the Invention

The invention is defined by an apparatus comprising features of independent claim 1. Preferred embodiments of this apparatus are represented in the subclaims.

Brief Description of the Drawings

Figure 1: is a schematic diagram illustrating a practice putting apparatus according to a first example not covered by the inven- tion, but helpful for understanding the invention;
Figure 2: is a schematic cross-section along a cross-section coincident with line 124a in Figure 1;
Figure 3: is a schematic diagram showing a practice putting apparatus according to a second example not covered by the invention, but helpful for understanding the invention;
Figure 4: is a schematic diagram showing a practice putting apparatus of a preferred embodi- ment in a first mode of operation; and
Figure 5: shows a second mode of operation of the practice putting apparatus of Figure 4.

Detailed Description of the Invention

Referring to Figure 1, there is shown a practice putting apparatus 100, 120. The practice putting apparatus has a putting target in the form of a golf ball return device 100 and has a light source 120 provided by first light 120a which is mounted on the housing 110 of the golf ball return device 100. The second light 120b is movable and is intended to be aligned in use with the first light to define a single line of light 124 that provides a guide path parallel to a putting line along which a golf ball is intended to be struck at the golf ball return device 100 to thereby provide a visual aid to the alignment of the putter 50 having a putting face 52 so that a golfer can practice aligning the putter relative to the putting line when striking a golf ball. That is, so that the putter face is square to the putting line and the putter club head is moving substantially along the putting line.
As illustrated in Figure 1, the line of light 124 consists of a first portion 124a which is projected by the first light 120a and a second portion 124b which is projected by the second light source 120b. Each light source 120 emits a broad planar beam of light so as to project a line along a practice surface 40 on which the practice putting apparatus 100,120 is located. That is, the lights are positioned so that the beam of light is perpendicular to the base of the housing 110 and hence to the practice surface. The first light 120 is slidably mounted within groove 112 of housing 110 in order to allow adjustment of the guide path. This allows the person practicing to adjust for any borrow caused by unevenness in the practice surface. That is, most floors are uneven so that the ball will tend to roll from left to right or right to left. Accordingly, if the putting line from the place where the putter head 50 is located to the golf ball return device 100 corresponds to arrow A or B, the golfer can move first light 120a to align with the correct putting line and then move second light 120b so that it lines up with the first line. As both the first and second lights 120 project lines of light on the practice surface 40 it is easy to align them correctly.
The apparatus will now be explained in more detail with reference to Figure 2 which is a schematic cross-sectional view of the golf ball return device 100 and the first light 120a placed on practice surface 40. It will be seen that golf ball return device 100 has a ramp 101 up which the golf ball travels when struck correctly to rest in dish portion 102. A sensor 103 is placed at the bottom of the dish so that when the ball comes to rest on the sensor it triggers a return mechanism 104. The return mechanism 104 is not shown in detail however persons skilled in the art will be familiar with the operation of such devices. Typically they have a spring loaded mechanism which is loaded upon the golf ball being received on the sensor 103. The spring loaded mechanism draws back a shaft and then releases the shaft to strike the golf ball and return it back towards the golfer. It is also known in the art to make this mechanism adjustable so that the player can adjust the distance through which the ball is returned.
Light 120a consists of a mounting portion 121 that is slidably received within groove 122. The light has a laser 122 and a cylindrical prism 123 which projects a broad planar beam of light 125 which will define line 124a on the practice surface 40.
Persons skilled in the art will appreciate that any appropriate power source such as mains power or battery power can be used to power the return mechanism 104 and light 120a. Second light 120b is essentially of the same construction as light 120a, however, it typically has a broader base so it is easier to position. It will be more usual for light 120b to be battery operated as this makes it more convenient to move this light 120b into position. Persons skilled in the art will appreciate that if light 120a is strong enough, light 120b can be replaced by a mirror to reflect the second portion 124b of the single line of light when aligned correctly. An advantage of the first example is that the lines of light are on both the target side of the putter and behind the putter the line of light (as perceived by the golfer) is not interrupted by the golf ball or the putter head 50 so that no matter where the putter is located along line 124 the golfer will be able to perceive whether they have aligned their club face perpendicularly to the putting line.
Persons skilled in the art will appreciate that a number of additional features can be incorporated into the apparatus. For example, the device may incorporate a timer which switches off the lights 120 after a fixed period such as five minutes after the device is turned on. This has the advantage of defining a strict practice period for the golfer (for example, if the golfer is practicing in their office) and also as acting as a power saving device.
A second example of a practice putting apparatus 200,220 is illustrated in Figure 3. Where appropriate, the same reference numerals are used to describe elements in the second example that are like elements in the first example. The light source in the second example is provided by a pair of lights 220a,220b both mounted within groove 112. The lights are slidably mounted so that their position can be moved. In this example, the guide path is defined by lines of light 224a and 224b which pass to either side of putter head 50. The lights can be slidably adjusted to adjust the width of the gap between first line of light 224a and second line of light 224b so that the lines of light pass just to the side of the putter head 50 when the golfer putts along putting line C. As in the first embodiment, the lights 220 can also be adjusted in order to adjust for different required putting lines to account for borrow in the practice surface 40. In one variant of this example, one or both of the lights 220 is made detachable so that the person can switch from a first mode in which they practice keeping their putter perpendicular to the putting line C with lines to either side of the putter head and a second mode where they can practice in accordance with the technique of the first example.
Persons skilled in the art will appreciate that numerous minor variations can be made. For example, rather than mounting the lights within the groove, the lights can be mounted on a rail or, the first light can be mounted substantially within the housing, for example directly above return mechanism 104.
The light sources may also incorporate a means for adjusting the orientation of the light so that the line extends substantially in the region of where the putter is to be located. It will also be appreciated that one or more light sources may be fixed in position on the housing or that the light source may be configured to protect a beam along different lines using diverting optics such as mirrors to vary the path.
Further, rather than a golf ball return device, the target could be in the form of a simulated hole in the region of dish portion 102 and the person could manually retrieve their balls. Other return mechanisms are also known in the art and can be substituted for the return mechanism of the example. These and other modifications will be apparent to persons skilled in the art.
A practice putting apparatus of an embodiment of the present invention is illustrated in Figures 4 and 5. In this embodiment the apparatus 300 has three fixed lights 320 comprising first and second side lights 320a,320b and a central light 320c.
Figure 4 illustrates the apparatus in a first mode of operation where the two side lights 320a,320b are on so as to define a guide path by first line of light 324a and second line of light 324b.
The apparatus also has a switching mechanism for switching the apparatus from a state in which it is off, to the first mode of operation illustrated in Figure 4 and to a second mode of operation illustrated in Figure 5. The switching means includes a switch 330 mounted to the top of the housing 110, the switch 330 is formed of rubber and has a plurality of rubber fins 331 to facilitate switching of the switch with the head of a putter.
Referring now to Figure 5, there is shown the apparatus of Figure 4 operating in a second mode of operation in which the first and second side lights 320a,320b are off and the central light 320c is on. To enhance this mode of operation, it is preferred that in this embodiment the apparatus is additionally provided with a launch mat 360 from which a golf ball can be struck. The launch mat has an alignment means in the form of linear markings 361 that allows the launch mat 360 to be aligned with the remainder of the guide path defined by the light 320c (i.e. line of light 324c).
The line markings may be the same colour as the light to thereby give the appearance of the guideline extending beyond the putter head 50 even when the putter blocks the light 324c from the light source 320c.
In a further embodiment, the alignment means may, additionally, or alternatively comprise an elongate depression in the mat 360 along which the golf ball can be struck in use.
Variation or further modifications of this embodiment will be apparent to persons skilled in the art including variations employing features of the first and second examples.

Claims

A practice putting apparatus (300) comprising:
a putting target (101) comprising a housing (110) and a simulated golf hole (102) and a golf ball return device (100) for returning a ball that reaches said simulated golf hole (102) towards the place from which it was struck; and

a light source (320) that directs light outwardly relative to the housing (110) to light a guide path (324a,b,c) on a practice surface (40), the guide path (324a,b,c) being parallel to a putting line along which a golf ball is intended to be struck at said target (101) to thereby provide a visual aid to alignment of a putter head (50) when making a putting stroke along the putting line,

characterized in that the light source is formed from a combination of a central light (320c) mounted to the housing (110) so as to be centrally mounted relative to the target (101) and

first (320a) and second (320b) side lights mounted to the housing (110) to either side of the target (101); and

switching means (330) are provided switching between at least first and second modes of operation, the side lights (320a,b) operating in the first mode and the central light (320c) operating in the second mode.
A practice putting apparatus as claimed in claim 1 wherein each light emits a broad planar beam of light (125) in a plane substantially perpendicular to a practice surface (40) to thereby light said guide path.
A practice putting apparatus as claimed in claim 2 wherein each light comprises a laser (122) and a cylindrical prism (123).
A practice putting apparatus as claimed in claim 1 further comprising a mirror to be placed on the opposite side to the target (101) of the position where the putter is to be located and aligned relative to the light to reflect light from the light such that said guide path comprises a single line of light (324c) parallel to said putting line.
A practice putting apparatus as claimed in claim 1 comprising a timer for turning off at least part of said light source (320) after a predetermined period of time.
A practice putting apparatus as claimed in claim 1 wherein said apparatus further comprises a launch mat (360) from which the golf ball can be struck, the launch mat (360) comprising alignment means (361) that can be aligned along the guide path (324c), and which provides a continuation of the guide path (324c) when the light source (320c) is blocked by the putter.
A practice putting apparatus as claimed in claim 6 wherein the alignment means comprise linear markings (361) on the mat (360).
A practice putting apparatus as claimed in claim 1 wherein the alignment means comprise a linear indentation in the mat (360).
A practice putting apparatus as claimed in claim 1 wherein said first (320a) and second (320b) side lights are mounted within a housing (110) for said target (101) to either side of said target (101).