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Publication numberUS3918711 A
Publication typeGrant
Publication dateNov 11, 1975
Filing dateJan 14, 1974
Priority dateJan 14, 1974
Publication numberUS 3918711 A, US 3918711A, US-A-3918711, US3918711 A, US3918711A
InventorsZak Thomas J
Original AssigneeZak Thomas J
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Tennis training ball target and projector
US 3918711 A
A tennis trainer assembly for use indoors or outdoors wherein a user practices tennis shots from a user's mat with feet indicia recommending stances for forehand and backhand shots. The user drives a ball toward a non-rebound target which intercepts the driven ball and drops it into a lower trough member having a ball discharge at a low point. The ball is collected in means to allow the collected balls to be placed in a ball return device intermediate the target and the user's mat, said return device desirably positioned so that returned balls bounce to predetermined height levels so that the user's shot can drive the ball again toward the non-rebound target.
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Description  (OCR text may contain errors)

1 Nov. 11, 1975 1 TENNIS TRAINING BALL TARGET AND PROJECTOR [76] Inventor: Thomas J. Zak, 2251 S. 18th Ave.,

Broadview, 111. 60153 [22] Filed: Jan. 14, 1974 21 Appl. No.: 432,948

52 us. 01. 273/29 A; 273/103; 273/181 F; 273/26 A; 273/26 13 511 1111. C1 A63B 61/00 [58] Field of Search 273/26 A, 29 A, 30, 181 R,

Murphy 273/29 A Hendry 273/103 X Primary Examiner-Richard J. Apley Assismm E.\'aminerT. Brown Attorney, Agent, or FirmDominik, Knechtel, Godula & Demeur [5 7] ABSTRACT A tennis trainer assembly for use indoors or outdoors wherein a user practices tennis shots from a users mat with feet indicia recommending stances for forehand and backhand shots. The user drives a ball toward a non-rebound target which intercepts the driven ball and drops it into a lower trough member having a ball discharge at a low point. The ball is collected in means to allow the collected balls to be placed in a ball return device intermediate the target and the users mat. said return device desirably positioned so that returned balls bounce to predetermined height levels so that the users shot can drive the ball again toward the non-rebound target.

1 Claim, 5 Drawing Figures US. Patent Nov. 11,1975 Sheet 1 of2 3,918,711


US. Patent Nov. 11, 1975 Sheet20f2 3,918,711

TENNIS TRAINING BALL TARGET AND PROJECTOR This invention relates to a tennis trainer wherein a non-rebound target intercepts the ball and drops it to means used for returning a ball to the user of the trainer device. The invention particularly relates to a tennis trainer assembly wherein such a non-rebound target is used in combination with collecting means for the tennis ball, tennis ball return devices, and a users mat which positions the user in recommended stances for returning the ball again toward the non-rebound target.

The increasing popularity of tennis has led many practitioners of this game to seek out means for improving their techniques. This has involved the use of various devices wherein players can practice various tennis shots. Such devices are particularly desirable in view of the limited indoor and outdoor court space relative to the number of skilled players. Among the various devices introduced to the art for this purpose are included various target devices which the tennis player can use for directing his volleys. Such target devices generally provide rebound features so that the ball can be returned to the player. Other devices are known for serving these general purposes, namely, devices dis closed in U.S. Pat. No. 2,215,432 and British Pat. No. 384,786.

It is a general object of the present invention to provide a trainer to help the tennis player learn and practice the various strokes of tennis, both forehand and backhand, using proper technique, without the need for an actual tennis court. In particular, this object is concerned with providing a novel assembly wherein a trainer utilizes a target structure which collects driven tennis balls and drops them, without rebound, to a lower trough member that discharges the tennis balls at a low point into collecting means.

Another object is an improved tennis trainer device and assembly to guide the tennis student and practicing player through the basics of tennis strokes, using correct grips, footwork and form. An aspect of this object is to provide a tennis trainer which will allow the practitioner to execute actual tennis shots, by stroking tennis balls which are pitched towards him by an automatic return device controlled by the user.

Yet another object of the present invention is an improved tennis trainer which uses in the assembly a mat for the practitioner which is carefully marked with indicia to indicate recommended feet positions for both forehand and backhand strokes, as well as the ball flight path and the contact point where the 'tennis racket should meet the ball. A feature of this object is the provision of flexibility for use with both righthanded and lefthanded players.

Still yet another object of the present invention is to provide an improved trainer which allows wide flexibility in use to allow practice shots to be returned to the user at predetermined positions to allow execution of a variety of particular shots against the target.

Yet still another object of the present invention is to provide a tennis trainer which is portable and adaptable to a variety of quick installations, outdoor or indoor, with wide choices available to the user for positioning the target and the means for returning the ball relative to the practitioner.

The foregoing objects are attained together with still other objects which will occur to practitioners by the invention of the following disclosure, including drawings wherein:

FIG. 1 is a perspective view showing the preferred total assembly;

FIG. 2 is a portional perspective view showing alternative means joining collected tennis balls to a return device;

FIG. 3 is a side elevational view of an alternative embodiment of the non-rebound member used in the as- .sembly;

FIG. 4 is a partial front elevational view of the member shown in the view of FIG. 3; and

FIG. 5 is a top plan view illustrating one side of the users mat comprising a part of the preferred tennis trainer assembly.

Looking first at the view of FIG. I, there is seen components of the preferred embodiment including a nonrebound target designated generally as A; a collecting means for tennis balls which hit the target, designated generally as B; a return device for the tennis balls indicated generally as C; and a users mat indicated generally as D. The various components cooperate to attain improved results as a tennis trainer assembly.

Looking at the non-rebound target first, there is seen a frame member shown generally as 10. Such member includes a target support portion having opposite side frame members 12, a top frame member 14, and a bottom frame member 16. The frame members are illustrated as having a tubular construction of different diameters so that some frame members may telescopically engage other frame members. A base portion includes foot frame members 18 of general U-shape. with friction foot pads 20.

The target support frame portion is of general rectangular shape which is defined by side frame members 12, top frame member 14 and bottom frame member 16. This rectangular target support is tilted or skewed in a direction opposite to the direction of a ball driven towards the target. This rectangular frame portion supports a substantially inelastic sheet material shown generally as 22. Said sheet material is suspended within the rectangular member'by substantially inelastic mounting means shown as including a fold 24 encircling the top frame member, and ties such as 26 connecting the sheet material to the side frame member 12. A target designation 28 is illustrated on the face of the sheet material 22 to which the user directs his shots.

A trough member 29 is provided along the bottom portion of the sheet material 22. The illustrated trough member is formed by an upturned fold of the flexible sheet material. The configuration of the trough is facilitated by providing substantially rigid straps 30 and spacing members such as rod 31. The spacing members are fastened to strap 30 at one end and to the sheet material at reinforced portions 32 at the other end. It is required that the trough member be formed with a low point 34 substantially at the central portion of the trough member. The trough extends from the target a minor distance of the height of the target. A ball discharge, shown as an opening 36, is provided at this low point. The low point may be attained by various provisions such as the illustrated means which provide extending opposite sides 38 of the fold to a higher point than portions intermediate such sides.

Positioned below the ball discharge 36 is the collection means which is shown as an open top container 40 in which a plurality of collected tennis balls 42 are shown. Spaced from the collecting means is shown a return device which includes a hopper portion 44 for receiving the plurality of tennis balls 42. Such hopper device feeds balls one at a time to mechanically driven catapult means (not shown) which deliver tennis balls through discharge chute 46, the path of the ball being indicated. The return device is preferrably mobile so that wheels 48 are mounted thereon. In the preferred form, the return device is electrically operated and an electric cord 50 is shown for connection to the usual AC outlet. The operation of the return device may be controlled by switch 52 connected by cord or conductor 54 to the electric motor and actuating means, not shown. The details of the return device are not shown since they, as such, do not comprise an essential part of the present invention. Such return devices are available in the market and practitioners will recognize that conventional means may be provided for feeding the balls to catapult devices which propel the ball towards the user. The return device participates importantly in the present assembly in that the device may be economically provided with a fixed execution stroke of the catapult device. In other words, the ball will always be thrown at a given force, and the bounce of the ball to the user will be determined by the catapulting projectory of the ball. The actual delivery of the ball to the vicinity of the user'can be controlled by repositioning the return device through rolling action, back and forth.

The users mat is an elongated planer structure which is preferably flexible so that it can be packaged and stored. The side 56 of the users mat is shown with feet position indicia 58 to indicate the recommended forehand stroke for a righthanded player; and with feet position indicia 60 to indicate the recommended stance for the backhand position of the user. Such indicia are shown relative to the hand strength of a righthanded player, and the opposite side of the mat may have reverse feet indicia positions for a lefthanded player. The return device may be preset to sequentially. return balls at set time intervals, or the balls may be returned only upon actuation of the switch 52 by the user. ltis seen that the forehand and backhand feet indicia positions are spaced from each other toward the opposite ends of the elongated mat member, and that the ball direction line will be located somewhat centrally between such feet indicia positions.

The alternative embodiment shown in FIG. 2 illustrates a collecting means for the tennis balls having a conveyor channel 62 which delivers tennis balls directly to a return device C to which such channel 62 is joined. The channel device 62 may be connected directly to the return device or may be spaced to an inlet (not shown) which delivers balls into a hopper arrangement (not shown).

Referring now to FIGS. 3 and 4, an alternative embodiment is shown relative to a trough member 64. This trough member may be separately affixed, or be formed as a bottom fold. The frame member includes an upper frame support to suspend substantially inelastic sheet material 66. Such upper frame support has an upper elongated tube part 67 and spaced side frame parts 68, only one of which is shown. An enlarged diameter side tube part 69 is also provided to telescopi cally engage side part 68 for adjusting the height of the upper frame support member. Side frame part 68 is formed as an angle with the short arm being received frame parts by fasteners 76. A lower transverse tubular support 78 extends between the U-shaped leg mem-' bers, and the opposite ends of tubular support 78 telescopically receives lateral pins 79 secured by fastener 80 similar to fastener 71. Side support members 81 extend between side tubular members 69 and angular members 74. The trough member 64 is formed by flexible material 82 which is secured at its opposite sides to side supports 81 at a plurality of spaced support points having fasteners such as 82. The flexible material 83 may be separate from the sheet material 66 or may represent a bottom fold which is extended outwardly and supported between the side supports as shown. In any event, the trough member has a low point 86 located at a substantially central position between the opposite sides, and a ball discharge opening 88 is provided'at such low point to discharge balls into open top collec-,-

tion means, shown as box 90.

The view of FIG. 5 shows the users mat with the forehand feet indicia 92 and the backhand feet indicia 94 for a righthanded player,as before. In addition, such a mat includes a ball path indicia line 96 to guide the user striking the tennis ball. The mat also has a ball contact indicia line 98 which indicates where the user i should strike the ball when it is above line 96. The ball path line 96 is elongated and the long axis is perpendicular to the long axis of the mat; and is further perpendicular to the long axis ofthe ball contact indicia line 98.

In use, the player will hit each ball towards the target to develop accuracy, using proper techniques for forehand and backhand shots. Preferably, the mat is posi-. tioned so that the ball path line is substantially aligned with the flight of the ball returning from the feeder. .The properly positioned player then properly contacts the ball above the ball contact line. The return feeder is' preferably provided with catapulting means which pitches balls towards the player about every three seconds to give him time to study the individual shot, as

well as the results of the shot and adjustment to correct errors in technique. The non-rebound targetdoes not distract the player as would occur if the balls would be bouncing back immediately after each shot. Preferably, the ball catapulted from the return feeder is set to fol low a trajectory where the peak height is about head high. The return feeder is set so that the trajectory of the ball results in a bounce to a peak height of about waist high when it is in a position to be struck by the player. The return feeder catapults or pitches each ball in substantially the sametrajectory so that changes in technique are realized by varying the distance of the feeder relative to the mat.

Selecting the farthest distance of the feeder relative to the mat results in the ball bouncing over the ball contact line at peak bounce height. Positioning the a feeder slightly closer to the mat results in the ball trajectory being on the rise as it bounces over the ball. contact line. Positioning the feeder still closer now. re-

sults in the half-volley bounce because the ball will be bouncing up from the ground as it passes over the ball contact line. Setting the return feeder still closer results in the balls passing over the contact line before bouncing, but at a low trajectory, thus creating the low volley shot. Moving the return feeder still closer to the mat will allow the volley shot to be of medium height; and at the closest position to the mat, the high volley shot can be practiced. The player can stand on the ball path line so that the volley shots will come directly at the player, and these shots can be practiced with the backhand stroke. ln addition, since the balls are being pitched towards the player just as they would on a tennis court and are not attached to strings or any other apparatus, the player can stroke the balls with a flat stroke, chop, or top spin, as he chooses. He must also hit the target, which trains him in racket control and precise aim, which is what is required for good tennis technique.

A serve can also be practiced when the tennis trainer is used outdoors or indoors with high ceilings. The player will stand behind the mat and the foot switch will be placed at such a point also. The back edge of the mat can be used as the base line. The return feeder can also be used as an aid for ball supply for serve practice. The player can operate the foot switch so that two balls can be catapulted to be caught by the player. The return feeder can then be stopped while the player serves the two balls.

It is possible to use a variable control return feeder which could remain stationary with collecting means for direct ball return from the trough. The trajectory of the return ball can then be variously controlled in the usual way.

The tennis trainer assembly which is disclosed is understandably easy to assemble and disassemble, and can be easily transported from location to location. The tennis trainer can be set up in the basement, utility room, garage, backyard, driveway, or the like. It can be used indoors and outdoors, and can be specially set up for commercial establishments.

The claims of the invention are now presented and the terms of such claims may be better understood by reference to the language of the preceding specification and the views of the drawings.

What is claimed is:

l. A non-rebound tennis trainer assembly, including a substantially upright frame member, said frame member having side, top and bottom edges and bottom foot frame members to support said frame member,

a substantially inelastic, flexible sheet material having sides, top and bottom edges,

substantially inelastic means mounting said sheet material to said frame member so that the plane of the sheet material is positioned to intercept a driven tennis ball,

said sheet material and frame member being inclined in a direction opposite to the direction of a driven tennis ball to facilitate said tennis balldropping into an elongated trough member after impact with the sheet material,

said trough member having its length located along the bottom edge of the sheet material and extending to opposite side edges of said sheet material so that a tennis ball drops into the trough member following impact with said sheet material, the width of said trough member being substantially less than the height of said frame member,

a point in said trough member located substantially lower than the ends thereof and at the mid-portion of said trough member,

a ball discharge opening at said point, and

collecting means for tennis balls positioned below said ball discharge opening, a selectively positionable foot mat having fore-hand and back-hand stroke feet placement indicia on one side thereof for a righthand player and forehand and backhand stroke feet placement indicia on its reverse side for a left-hand player, said foot mat being placed a substantial distance from the ball impact side of said sheet material,

a tennis ball projecting device, said ball projecting device being freely movable and selectively positionable at different positions between said sheet material and said foot mat to project balls at a fixed trajectory towards said mat to be hit by a player and to vary the bounce height of the ball as it reaches the foot mat.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1371867 *Mar 20, 1920Mar 15, 1921John W E DeanAmusement and exercise apparatus
US1629907 *Mar 24, 1926May 24, 1927Jerry T DwyerGame apparatus
US2147705 *Jul 25, 1936Feb 21, 1939Hunter Harrison ABall catching and throwing apparatus
US2280376 *Feb 12, 1940Apr 21, 1942Clark Louis FMachine for playing tennis and the like
US2805070 *May 27, 1955Sep 3, 1957Waters Joseph LBall catcher
US2944816 *Mar 21, 1960Jul 12, 1960Dixon Jack RRecreational apparatus
US3231271 *Jun 28, 1963Jan 25, 1966Murphy William EApparatus for practicing strokes with a tennis racket
US3328033 *Feb 17, 1964Jun 27, 1967Adoniram J HendryGolf target
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4063739 *Jan 27, 1977Dec 20, 1977Rose WallyGolf warm up net
US4140313 *Oct 14, 1977Feb 20, 1979Martin Arthur LNet rebound wall adapter for tennis enclosure
US4243221 *Feb 7, 1979Jan 6, 1981Ferreira Godinho ManuelTraining device for practicing the service in tennis
US4275883 *Oct 9, 1979Jun 30, 1981Anthony GrimaldiPitching target with ball return
US4592547 *Sep 4, 1984Jun 3, 1986Thaxton George KTennis practice and game apparatus
US4643423 *Oct 31, 1984Feb 17, 1987Wright Robert LPitching target
US4718668 *Apr 14, 1986Jan 12, 1988Donald SchipskeUniversal tennis training means
US4886268 *May 9, 1988Dec 12, 1989Langslet Eric BBall capturing tennis net assembly
US4919421 *Feb 21, 1989Apr 24, 1990Vandeveld Paul ATennis ball diverter
US5042820 *May 26, 1987Aug 27, 1991Ford James MSoccerball returner
US5062646 *Jan 3, 1991Nov 5, 1991Crist Michael AVolleyball training apparatus
US5133546 *Jan 23, 1991Jul 28, 1992Lifetime Products, Inc.Foldable basketball game apparatus and method
US5242160 *Mar 6, 1992Sep 7, 1993Indoor Activities Unlimited, Inc.Portable backstop
US5246225 *Apr 21, 1992Sep 21, 1993Matherne Lonny RFoldable arcade game apparatus and method
US5286029 *Jun 29, 1993Feb 15, 1994Smit Hendrik PGolf practice apparatus
US5335905 *Nov 12, 1993Aug 9, 1994Newgarden Jr Joseph ERobot table tennis net and server assembly
US5344138 *Jun 14, 1991Sep 6, 1994Hellriegel Ernst WTennis training apparatus
US5354049 *Jul 30, 1993Oct 11, 1994Matherne Lonny RApparatus and method for packaging a portable basketball system
US5377976 *Jul 27, 1993Jan 3, 1995Lifetime Products, Inc.Portable basketball system
US5383658 *Oct 9, 1992Jan 24, 1995Newgarden, Jr.; Joseph E.Robot table tennis net and server assembly
US5947831 *Aug 27, 1997Sep 7, 1999Mccarthy; Charles J.Target for golf practice
US6312343 *Nov 27, 1999Nov 6, 2001Kwang H. ChoPortable net device
US6315677 *Feb 28, 2000Nov 13, 2001David SandlinGolf ball catching funnel
US6352481 *Sep 1, 2000Mar 5, 2002Juntae PakGolf swing improving system
US6554717Apr 2, 2001Apr 29, 2003Kwang H. ChoPortable net device
US6729981Oct 16, 2002May 4, 2004Robert W. CliftonFoul ball basket for baseball backstops
US6758770 *Nov 7, 2003Jul 6, 2004Alan ChandronnaitSafety nets system
US6761644 *Sep 25, 2002Jul 13, 2004Gerald AubertPortable target for sporting projectiles
US7056241May 25, 2004Jun 6, 2006Ishino Edmund SVolleyball net support system
US8182372 *May 22, 2012Bernard HayesDevice for training athletic or sports ball players
US9120000 *Feb 22, 2013Sep 1, 2015Timothy Myles WestonCatching apparatus and method
US20040110579 *Nov 7, 2003Jun 10, 2004Chandronnait Alan BruceSafety nets system
US20050072417 *Jun 30, 2003Apr 7, 2005Barron Charles F.Ball throwing apparatus
US20100062880 *Mar 11, 2010Bernard HayesDevice for training athletic or sports ball players
US20120040781 *Jul 22, 2011Feb 16, 2012Randall EdmistonAthletic training and practice system
US20120208659 *Aug 16, 2012Bernard HayesDevice for Training Athletic or Sports Ball Players
US20140243118 *Feb 22, 2013Aug 28, 2014Timothy Myles WestonCatching apparatus and method
US20150190696 *Jan 7, 2015Jul 9, 2015Marty Gilman, Inc.Feeding Net
USD351879Jul 30, 1993Oct 25, 1994 Base for a basketball goal
USD351882Jul 30, 1993Oct 25, 1994 Base for a basketball goal
USD734822Jan 13, 2015Jul 21, 2015James CAPPELLOAthletic training device
CN102649014A *Apr 10, 2012Aug 29, 2012李群星Tennis net capable of enabling net contacting tennis balls to roll together along slope for assisting player training
DE4403424A1 *Feb 4, 1994Mar 30, 1995Erhard ScheldTraining device for tennis players
DE4403424C2 *Feb 4, 1994Sep 10, 1998Erhard ScheldTrainingsgerät für Tennisspieler
EP0561070A1 *Mar 19, 1992Sep 22, 1993Ernst Walter HellriegelTennis trainer apparatus
WO1984003222A1 *Feb 16, 1984Aug 30, 1984Stabeg Apparatebau GmbhBouncing wall with elastic damping for tennis training
WO1988002644A1 *Sep 29, 1987Apr 21, 1988Bo Lennart HenningssonTennis practice device
WO2001037951A1 *Sep 26, 2000May 31, 2001Cho Kwang HPortable net device
U.S. Classification473/462, 473/195, 473/197
International ClassificationA63B69/38, A63B47/00, A63B47/02
Cooperative ClassificationA63B69/38, A63B47/025
European ClassificationA63B69/38