WO2001058540A1 - A training device - Google Patents

A training device Download PDF

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Publication number
WO2001058540A1
WO2001058540A1 PCT/IB2001/000112 IB0100112W WO0158540A1 WO 2001058540 A1 WO2001058540 A1 WO 2001058540A1 IB 0100112 W IB0100112 W IB 0100112W WO 0158540 A1 WO0158540 A1 WO 0158540A1
Authority
WO
WIPO (PCT)
Prior art keywords
support
target
training
crossbar
uprights
Prior art date
Application number
PCT/IB2001/000112
Other languages
French (fr)
Inventor
Karl Frederik Venter
Original Assignee
Karl Frederik Venter
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
Priority to ZA200000673 priority Critical
Priority to ZA2000/0673 priority
Application filed by Karl Frederik Venter filed Critical Karl Frederik Venter
Publication of WO2001058540A1 publication Critical patent/WO2001058540A1/en

Links

Classifications

    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B69/00Training appliances or apparatus for special sports
    • A63B69/0073Means for releasably holding a ball in position; Balls constrained to move around a fixed point, e.g. by tethering
    • A63B69/0079Balls tethered to a line or cord
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B2210/00Space saving
    • A63B2210/50Size reducing arrangements for stowing or transport
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B69/00Training appliances or apparatus for special sports
    • A63B69/38Training appliances or apparatus for special sports for tennis

Abstract

The invention provides a training device and kit for assembling it, for training a player of a game employing a racquet to execute an overhead stroke. The device includes a support, an elongated connecting element connected to the support, and a target member connected to the elongate connecting element, which connections are disconnectable to provide the kit. The support has an operative upright attitude in which it supports the target member with the connecting element depending downwardly from the support and the target member suspended by the connecting element. The target member occupies a position unobstructed by the support, at an elevation where it forms a target for an overhead training stroke by a player employing a racquet.

Description

TITLE : A TRAINING DEVICE

THIS INVENTION relates to a training device. More particularly the invention relates to a training device for training a player of a game employing a racquet, such as a tennis player, squash player, badminton player, or the like. The invention also relates to a kit for assembly from a disassembled condition into an assembled condition, to erect such training device.

According to the invention there is provided a training device for training a player of a game employing a racquet to execute an overhead stroke, the device including : a support; an elongated connecting element connected to the support; and a target member connected to the connecting element at a position spaced along the connecting element from the support, the support having an upright operative attitude in which it supports the target member with the connecting element depending downwardly from the support and the target member suspended by the connecting element at a position unobstructed by the support, at an elevation where it forms a target for an overhead training stroke by a player employing a racquet.

The connecting element may be flexible, the target member being a ball, the connecting element having an end to which the target member is connected, and the connecting element having another end to which the support is connected .

The training device may include a mounting means attached to the support for mounting the support on a suitable support surface or substrate or on some other suitable supporting structure. Conveniently, however, the support may be free-standing and in particular the support may be capable of assuming its upright operative attitude on a flat upwardly facing horizontal support surface on which it is free-standing.

The support may be adjustable in height to enable the target member such as a ball to be suspended at a preselected height above the substrate. In other words, the support may, in the upright operative attitude thereof, adjustable to permit adjustment of the elevation of the target member.

The connecting element may be a flexible cord; and the connecting element may be rotatably connected to the support by a rotatable connection which permits the connecting element and target member to rotate about a substantially horizontal axis provided by the support in its upright operative attitude. By substantially horizontal is meant that the axis departs by no more than 1 0 degrees from the horizontal, preferably by no more than 5 degrees.

In a preferred embodiment of the invention, the support may comprise a free-standing frame having a pair of opposed uprights and a substantially horizontal crossbar, the ball or other target member being suspended from the crossbar by the connecting element.

More particularly and in other words, the support may be in the form of a frame including a pair of spaced parallel uprights and a crossbar extending transversely to, eg substantially normal to, and interconnecting, the uprights, the connection of the connection element to the support being to the crossbar of the frame, the uprights, in the upright operative attitude of the support, supporting the crossbar at a position spaced above the target member. The uprights may be telescopically extensible and retractable to permit, in the upright operative attitude of the support, adjustment of the elevation of the crossbar. In another embodiment, the support may comprise a single upright, optionally telescopically extensible and retractable, such as a post or pedestal, and a substantially horizontal crossbar attached to the upright, the connecting element being connected to the crossbar and the ball or other target member being suspended from the crossbar by the connecting element.

As indicated above, the device may include a rotatable connection between the connecting element and support, and this rotatable connection may act as an attachment at least partly rotatably attached to the support, the connecting element being connected to the support by the attachment. The attachment may comprise a sleeve, collar, or the like, rotatably attached to the crossbar of the support. More particularly, the connection of the connecting element to the support may be provided by a connecting member having an opening therethrough, the crossbar extending through the opening and being held captive in the connecting member, and the connecting member, together with the connecting element and the target member, being rotatable about an axis provided by the crossbar, which axis, in the upright operative attitude of the support, is substantially horizontal. Instead, the connecting element may be fast with the support, the connecting element having flexibility which permits the ball or other target member to swing from the support when struck by a racquet. The invention extends to a kit for assembly from a disassembled condition into an assembled condition, to erect a training device, the kit including: a support; an elongated connecting element for connection to the support; and a target member for connection to the connecting element at a position spaced along the connecting element from the support, the support having an upright operative attitude which, when the connecting member is connected respectively to the support and to the target member, permits the support to support the target member with the connecting element depending downwardly from the support and the target member suspended by the connecting member at a position unobstructed by, and spaced below, the support, at an elevation where it forms a target for an overhead training stroke by a player employing a racquet.

The invention will now described, by way of example, with reference to the accompanying diagrammatic drawings, in which:

Figure 1 shows a schematic three-dimensional view of a training device in accordance with the invention;

Figure 2 shows a schematic front/rear elevation of a developed and improved version of the training device of Figure 1 ;

Figure 3 shows a side elevation of the device of Figure 2; Figure 4 shows a plan view of the device of Figure 2; Figure 5 shows a detailed view on an enlarged scale and corresponding to Figure 2, of the cross-brace of the device of Figures 2- Figure 6 shows an end to elevation, in the direction of line VI - VI in Figure 5, of the cross-brace of Figure 5;

Figure 7 shows a detail view on an enlarged scale and corresponding to Figure 3, of one of two base members or pedestals of the device of Figures 2-4;

Figure 8 shows an end elevation, in the direction of line VIII - VIII in Figure 7, of the pedestal of Figure 7;

Figure 9 shows a detail view on an enlarged scale and corresponding to Figure 2, of one of two outrigger supports of the device of Figures 2-4;

Figure 1 0 shows an end elevation, in the direction of line X - X in Figure 9, of the outrigger support of Figure 9;

Figure 1 1 shows a detail view on an enlarged scale and corresponding to Figure 2, of the lowermost portion of one of the two uprights of the device of Figures 2-4;

Figure 1 2 shows a detail view on an enlarged scale and corresponding to Figure 2, of the next-to-lowermost portion of one of the two uprights of the device of Figures 2-4;

Figure 1 3 shows a detail on an enlarged scale and corresponding to Figure 2, of the uppermost portion of one of the two uprights of the device of Figures 2-4;

Figure 14 shows a detail on an enlarged scale and corresponding to Figure 2, of the upper end of one of the two uprights of the device of Figures 2-4; Figure 1 5 shows a detail on an enlarged scale and corresponding to Figure 2, of the crossbar of the device of Figures 2-4; and

Figure 1 6 shows a three-dimensional view on an enlarged scale of a clamping pin forming part of the device of Figures 2-4. In Figure 1 of the drawings a training device according to the invention is generally designated by reference numeral 1 0. It will be appreciated that the training device 1 0 is not drawn strictly to scale. The training device 10 is designed for training a tennis player 1 2 in executing an overhead stroke, such as a serve or smash. The device has an upright operative attitude, in which it is shown in Figure 1 .

The device 1 0 includes a support comprising a pair of spaced substantially vertical uprights 1 4 bridged at upper ends 1 6 thereof by a substantially horizontal crossbar 1 8, normal to the uprights .

A flexible cord 20 depends from the centre or midpoint 22 of the crossbar 1 8. An upper end 24 of the cord 20 is connected to the crossbar 1 8 by means of a rotatable collar 26 in a central opening or passage of which the crossbar is received and held captive; and a tennis ball 28 is attached to the opposite or free end 30 of the cord 20 remote from the crossbar 1 8, which permits the tennis ball 28 to depend from the crossbar 1 8 into a free or unobstructed working space 32 defined between the two uprights 1 4, by the crossbar 1 8 and by the substrate or flat horizontal upwardly facing support surface 34 on which the device 1 0 is erected. The collar 26 is freely rotatable about the longitudinal axis of the crossbar 1 8, as indicated by the arrows labelled A and B.

Each of the uprights 1 4 comprises three telescopically extensible and rotatable interconnected hollow steel square tubing portions 36, 38 and 40. Each of the portions 36, 38 and 40 has a series of longitudinally, ie vertically, spaced pairs of holes 42 through opposed walls thereof, for receiving a pin (not shown in Figure 1 ), the height of each upright 14 being adjustable by varying the pair of holes 42 into which the respective associated pin is placed . In this way the height or elevation above the substrate or support surface 34 of the crossbar 1 8 is adjustable by adjusting the height of the uprights 1 4. It will be appreciated that the number of portions may vary and a suitable number of portions may be selected to provide for the required height adjustment and also for ease of dismantling and storage in kit form of the above device, from which it can later be reassembled, when required for use.

Each of the uprights 1 4 has a base member or pedestal 44 attached to the lower end 46 of its lowermost portion 40 for supporting the upright 1 4 on the substrate 34, the uprights 1 4 being free-standing and vertical (normal to the substrate 34) . A cross-brace 48 is attached to and bridges and interconnects the uprights 1 4 at the lower ends 46 thereof to enhance the rigidity of the structure. It will be appreciated that the cross-brace 48 should preferably be relatively flat so that it does not project significantly upwardly from the substrate 34, and does not interfere unacceptably with the free movement of the tennis player 1 2.

The device 1 0, apart from the cord 20 and ball 28, is of steel construction but, naturally, other materials of construction can be used instead.

In use with reference to Figure 1 , the elevation of the crossbar 1 8 is adjusted to suit the height of an individual tennis player 1 2, so as to position the tennis ball 28 at an optimal or acceptable height for contact by a racquet during an overhead stroke being practised. It will be appreciated that the training device of Figure 1 instead need have only one upright with a contilever-type horizontal crossbar attached to it, the horizontal crossbar having a cord with a tennis ball attached to it depending therefrom. In this case, the working spaced is defined by the upright, by the bar and by the substrate on which the training device is erected .

When the device 1 0 of Figure 1 is disassembled, it is contemplated that the portions 36, 38, 40 of the uprights 1 4 will be disconnected from one another; and the crossbar 1 8 will be detached from the uprights 1 4, the upper ends of the portions 36 in use being releasabiy received, spigot-socket fashion, in the upper ends 1 6 of the uprights 1 4, which ends 1 6 are fast with, eg welded to, the crossbar 1 8. Similarly, opposite ends of the cross-brace 48 may be releasabiy connected to the lower ends of the uprights 1 4 (not illustrated in Figure 1 but see Figures 2-4); the cord 20 may be releasabiy connected to the collar 36; and the ball

28 may in particular be releasabiy connected to the cord 20, so that the cord 20 and/or ball 28 can periodically be replaced, when required . Naturally, other ways of disassembling the device 10 into kit and reassembling the kit to produce the device 10, may be employed.

Turning to Figures 2-1 6 of the drawings, the same reference numerals are used, unless otherwise specified, to designate the same parts as in Figure 1 . While the construction of the device 1 0 of Figures 2-1 6 is of more or less similar steel construction to that of the device of Figure 1 , there are a number of differences, as described in more detail hereunder. With particular reference first to Figures 2-4 of the drawings, it is to be noted that, instead of being fast with to the upper ends 1 6 of the supports 1 4 as in Figures 1 , the crossbar 1 8 has its ends inserted through pairs of openings provided therefor in said upper ends 1 6 (see also Figure 1 4 where the locations of these openings are shown at 50 and Figure 1 5 in which the threaded ends of the crossbar 1 8 are designated 52) . It will also be noted that each pedestal 44 is associated with an outrigger support 54, to promote increased stability of the device 1 0, when free-standing in its operative upright attitude, the outrigger support 54 being described in more detail hereunder with reference to

Figures 9 and 1 0.

Referring now also to Figures 5 and 6, in which the cross- brace of the device 10 is designated 48, this cross-brace is of steel and of flat bar construction, having a central body portion 56 intended to lie flat on a support surface (see 34 in Figure 1 ) . Opposite ends of the bar are bent and cranked upwardly to provide connecting flanges 58 stiffened by braces 60 and provided with slots 62 for bolting to the uprights 1 4. The flanges 58 are normal to the body portion 56, and the braces 60 are of the same flat bar material as the body portion 56.

Turning to Figures 7 and 8, in which one of the pedestals is designated 44, the pedestal 44 is of square steel tubing construction, having a horizontal body portion 64 with a downwardly directed stud 66 on its underside at each end thereof. At the midpoint of the body portion 64 a socket member 68 of square steel tubing is welded thereto, the socket member 68 opening upwardly and receiving the lower end 46 of the portion 40 of the associated upright 1 4. The socket member 68 has a threaded stud 70 projecting from one side thereof, and has a threaded stud 72 projecting from the opposite side thereof. The body portion 64 has a pair of openings 74 through opposed walls thereof, one of which is visible in Figure 7. The stud 70 is above one of the openings of 74. A set screw 76 is shown screwing through a threaded opening in the wall of the socket 68 which is visible in Figure 8, the threaded opening being at a level slightly below the height of the stud 72.

In Figures 9 and 1 0 the outrigger support shown is of square steel tubing, being designated 54, and it is shown with a stud 78 on its underside at one end thereof and a connecting flange 80 at the opposite end thereof. The flange 80 has a bolt hole 82, and a threaded stud 84 projecting therefrom, in a direction away from the stud 78.

In Figures 1 1 -1 5 the same reference numerals designate the same parts as in Figures 2-4, unless otherwise specified . The portion 40 of Figure 1 1 is shown with a single pair of holes 42 near its upper end 86, which upper end is provided with a set screw 88 engaging a threaded opening in one of the walls of the portion 40. The portion 38 of Figure 1 2 similarly has a set screw 90 through one of its walls at its upper end, and an uppermost pair of the holes 42 is spaced below the set screw 90. A series of further pairs of the holes 42 is shown, with the pairs spaced in series from one another, the top pair of the series being spaced below said uppermost pair of holes 42, the series extending to the lower end of the portion 38. The portion 36 of Figure 1 3 in turn has two pairs of holes 42, respectively at its upper and lower ends. The upper end 1 6 of Figure 1 4 has a set screw 92 through one of its walls near its lower end, and it has two pairs of holes 42, one adjacent and above the set screw 92, and one below and adjacent the openings 50, but through different walls of the square tubing . The crossbar 1 8 of Figure 1 5 has a pair of annular washers 94 welded thereto, respectively axially inwardly of and adjacent its threaded ends 52, the crossbar passing through the central openings of the washers 94.

In Figure 1 6 a clamping pin 96 is shown in position in one of the portions 40, or 38 of Figures 1 1 and 1 2 respectively, or in the upper end 1 6 of Figure 1 4. The clamping pin 96 is of spring steel rod or wire and is bent into the shape illustrated in Figure 1 6. The pin 96 is bent to have four limbs 98, 1 00, 102 and 1 04, arranged end - to - end in series and meeting at corners 1 06, 1 08 and 1 1 0 respectively. In use the limb 98 is inserted to extend through the square tubing of the portions 40 or 38 or the end 1 6, as the case may be, through an opposed pair of holes 42, with the limb 1 00 extending from the corner 1 06 obliquely downwardly to a corner of the tubing which registers with the corner 1 08 of the pin 96.

The limb 1 02 in turn extends from the corner 1 08 horizontally across a wall of the tubing, between the walls having the holes 42, so that the next corner 1 10 of the pin 96 registers with the next corner of the tubing . The free end of the limb 98 projects out of the hole 42 in the wall of the tubing remote from the limb 1 00, and the limb 104 extends horizontally across the wall from which the end of the limb

98 projects. The limbs 1 02 and 104 are thus roughly the same length as the width of the walls of the tubing, and the limb 98 is somewhat longer, so that its free end projects from the tubing, as illustrated . The limb 1 00 is of a sufficient length to provide the required flexibility to permit clamping and unclamping of the pin 96. It will be appreciated that, in use, the portion 40 will receive the portion 38 telescopically, the pair of holes 42 of the portion 40 registering with one of the pairs of holes 42 of the series of holes of the portion 38, the limb 98 of the associated pin 96 passing through said registering holes of both portion 40 and portion 38. Similarly, a pin 96 has its limb 98 passing through the uppermost pair of holes 42 of the portion 38 and the lower pair of holes 42 of the portion 36, which is received in the portion 38; and a pin 96 has its limb 98 passing through the upper pair of holes 42 of the portion 36 and the upper or lower pair of holes 42 of the upper end 1 6, as desired, in each case so that the pin

96 clasps the square tubing in question. In each case there will be a spigot/socket connection, the upper end 1 6 being a socket, the ends of the portion 36 being spigots, the portion 40 providing a socket, and the portion 38 providing a socket and a spigot at its upper and lower ends respectively. The pairs of holes 42 of each spigot will, naturally, register with the pairs of holes 42 of the associated socket, through which the associated pin 96 passes. The set screws 88, 90 and 92 will be used to stiffen and add stability to each support 14. To assemble the device of Figure 2-1 6 the uprights 1 4 are formed by connecting the portions 36-40 together, end-to-end using the pins 96 as described with reference to

Figure 1 6. The crossbar 1 8 has its ends 52 inserted through the passages 50 of the upper ends 1 6 until the washers 94 abut the upper ends 1 6, and the ends 52 are locked in place by respective nuts (not shown) . The upper ends 1 6 are then connected to the upper ends of the portions 36 using pins 96.

The lower ends 46 of the portions 40 are respectively inserted as spigots into the socket members 68 of the pedestals 44, where they are respectively clamped by the set screws 76. The supports 54 are then connected to the pedestals 44, the stud 84 of each support 54 passing through the openings 74 of the associated pedestal 44 and the lower slot 62 of the flange 58; and the studs 70 and 72 of the pedestals 44 in turn pass respectively through the openings 82 in the flanges 80 of the associated supports 54 and through the upper slots 62 of the associated flanges 58. The studs 70, 72 and 84 are then locked in place by nuts (not shown) . In this regard it is to be noted, as indicated above, that the studs 84 of the supports 54 pass respectively through the lower slots 62 of the flanges 58 of the cross-brace 48 so that the nut locking each stud 84 also locks both the adjacent flange 58 of the cross- brace 48, and the support 54 in question, to the associated pedestal 44. The nuts on the studs 72 also lock the flanges 58 of the cross-brace 48 to the socket members 68 of the pedestals 44, the studs 72 passing respectively through the upper slots 62 of the flanges 58.

To disassemble the device 1 0 of Figures 2-1 6, the various set screws (76, 88, 90 and 92 can be unscrewed, while the various pins 96 are undamped and the crossbar 1 8 is unscrewed from the upper ends 1 6 of the uprights 1 4.

Use of the device 1 0 of Figures 2-1 0 is essentially similar to the use of the device 1 0 of Figure 1 , as described above.

It is an advantage of the invention, with particular reference to the drawings, that it provides a training device for allowing a player of a racquet game to practice, by himself, overhead strokes, such as a smash or service, using a competitively priced device which is straightforward to assemble and/or disassemble.

Claims

1 . A training device for training a player of a game employing a racquet to execute an overhead stroke, the device including : a support; an elongated connecting element connected to the support; and a target member connected to the connecting element at a position spaced along the connecting element from the support, the support having an upright operative attitude in which it supports the target member with the connecting element depending downwardly from the support and the target member suspended by the connecting element at a position unobstructed by the support, at an elevation where it forms a target for an overhead training stroke by a player employing a racquet.
2. A device as claimed in claim 1 , in which the connecting element is flexible and the target member is a ball, the connecting element having an end to which the target member is connected, and the connecting element having another end to which the support is connected .
3. A device as claimed in claim 1 or claim 2, in which the support is capable of assuming its upright operative attitude on a flat upwardly facing horizontal support surface on which it is free-standing .
4. A device as claimed in any one of claims 1 - 3 inclusive, in which the support is, in the upright operative attitude thereof, adjustable to permit adjustment of the elevation of the target member.
5. A device as claimed in any one of the preceding claims, in which the connecting element is a flexible cord.
6. A device as claimed in any one of the preceding claims, in which the connecting element is rotatably connected to the support by a rotatable connection which permits the connecting element and target member to rotate about a substantially horizontal axis provided by the support in its upright operative attitude.
7. A device as claimed in any one of the preceding claims, in which the support is in the form of a frame including a pair of spaced parallel uprights and a crossbar extending transversely to, and interconnecting, the uprights, the connection of the connection element to the support being to the crossbar of the frame, the uprights, in the upright operative attitude of the support, supporting the crossbar at a position spaced above the target member.
8. A device as claimed in claim 7, in which the uprights are telescopically extensible and retractable to permit, in the upright operative attitude of the support, adjustment of the elevation of the crossbar.
9. A device as claimed in claim 7 or claim 8, in which the connection of the connecting element to the support is provided by a connecting member having an opening therethrough, the crossbar extending through the opening and being held captive in the connecting member, and the connecting member, together with the connecting element and the target member, being rotatable about an axis provided by the crossbar, which axis, in the upright operative attitude of the support, is substantially horizontal.
10. A kit for assembly from a disassembled condition into an assembled condition, to erect a training device, the kit including: a support; an elongated connecting element for connection to the support; and a target member for connection to the connecting element at a position spaced along the connecting element from the support, the support having an upright operative attitude which, when the connecting member is connected respectively to the support and to the target member, permits the support to support the target member with the connecting element depending downwardly from the support and the target member suspended by the connecting member at a position unobstructed by, and spaced below, the support, at an elevation where it forms a target for an overhead training stroke by a player employing a racquet.
1 1 . A training device as claimed in claim 1 , substantially as described and as illustrated herein.
1 2. A kit as claimed in claim 1 0, substantially as described and as illustrated herein.
PCT/IB2001/000112 2000-02-11 2001-01-31 A training device WO2001058540A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
ZA200000673 2000-02-11
ZA2000/0673 2000-02-11

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AU28734/01A AU2873401A (en) 2000-02-11 2001-01-31 A training device

Publications (1)

Publication Number Publication Date
WO2001058540A1 true WO2001058540A1 (en) 2001-08-16

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Application Number Title Priority Date Filing Date
PCT/IB2001/000112 WO2001058540A1 (en) 2000-02-11 2001-01-31 A training device

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WO (1) WO2001058540A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7816534B2 (en) 2002-03-12 2010-10-19 Merck Sharp & Dohme Corp. Substituted amides
GB2504526A (en) * 2012-08-01 2014-02-05 Michael Bernard Dewar A cricket training device with a ball suspended from a cord

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7905283A (en) * 1979-07-06 1981-01-08 Theodorus Leus Tennis service training appts. - has telescopic pillar carrying flexible ball suspension via longer rigid vertical rod rotatable about horizontal axis
US4865319A (en) * 1988-08-26 1989-09-12 Drazinakis Evan G Tennis training device
US5662537A (en) * 1996-06-11 1997-09-02 Zuber; Gary T. Tethered baseball batting practice apparatus
US5681168A (en) * 1995-02-22 1997-10-28 Brown; Alton R. Tethered ball device having chaotic motion and methods for training
US5688195A (en) * 1995-06-07 1997-11-18 Caso; Frank J. Tethered ball and support structure
DE29819017U1 (en) * 1998-10-27 1999-01-28 Jacobi Karl Ball game device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7905283A (en) * 1979-07-06 1981-01-08 Theodorus Leus Tennis service training appts. - has telescopic pillar carrying flexible ball suspension via longer rigid vertical rod rotatable about horizontal axis
US4865319A (en) * 1988-08-26 1989-09-12 Drazinakis Evan G Tennis training device
US5681168A (en) * 1995-02-22 1997-10-28 Brown; Alton R. Tethered ball device having chaotic motion and methods for training
US5688195A (en) * 1995-06-07 1997-11-18 Caso; Frank J. Tethered ball and support structure
US5662537A (en) * 1996-06-11 1997-09-02 Zuber; Gary T. Tethered baseball batting practice apparatus
DE29819017U1 (en) * 1998-10-27 1999-01-28 Jacobi Karl Ball game device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7816534B2 (en) 2002-03-12 2010-10-19 Merck Sharp & Dohme Corp. Substituted amides
GB2504526A (en) * 2012-08-01 2014-02-05 Michael Bernard Dewar A cricket training device with a ball suspended from a cord

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Publication number Publication date
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