EP0282767B1 - Appareil pour varier manuellement la pression de balles sans soupapes - Google Patents

Appareil pour varier manuellement la pression de balles sans soupapes Download PDF

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Publication number
EP0282767B1
EP0282767B1 EP88102580A EP88102580A EP0282767B1 EP 0282767 B1 EP0282767 B1 EP 0282767B1 EP 88102580 A EP88102580 A EP 88102580A EP 88102580 A EP88102580 A EP 88102580A EP 0282767 B1 EP0282767 B1 EP 0282767B1
Authority
EP
European Patent Office
Prior art keywords
ball
syringe
base plate
hand device
injection
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP88102580A
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German (de)
English (en)
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EP0282767A2 (fr
EP0282767A3 (en
Inventor
Bernhard Graf
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Individual
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Individual
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Filing date
Publication date
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Priority to AT88102580T priority Critical patent/ATE68712T1/de
Publication of EP0282767A2 publication Critical patent/EP0282767A2/fr
Publication of EP0282767A3 publication Critical patent/EP0282767A3/de
Application granted granted Critical
Publication of EP0282767B1 publication Critical patent/EP0282767B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B39/00—Hollow non-inflatable balls, i.e. having no valves
    • A63B39/02—Arrangements for maintaining the pressure
    • A63B39/04—Pricking-balls; Tools for blowing them up

Definitions

  • the invention relates to a hand-held device for changing the gas pressure in valveless balls, in particular tennis balls, according to the preamble of claim 1.
  • the hollow needle is designed as a strong tubular part, which is screwed with its foot part into a transverse wall of a substantially cylindrical outer housing, into which can be axially displaced from above to the hollow needle a further cylindrical housing can be inserted, the bottom of which is formed by the base plate which supports the ball which can be inserted laterally into the further housing.
  • the outer housing forms a chamber for an aerosol can below the transverse wall in the handle part of this hand-held device, which chamber is connected to the hollow needle via a valve and a feed line through the transverse wall. If the further, housing for the ball is inserted into the outer housing from above, the hollow needle penetrates through an axial bore of the base plate through the wall of the ball lying against the base plate into its interior. If the valve of the aerosol can is then actuated, a mixture of compressed air and sealant contained therein flows under pressure through the feed line and the hollow needle into the interior of the ball.
  • the known device when used with tennis balls or balls of similar size also referred to as a hand-held device with its relatively large outer housing containing an aerosol can in the handle and the further housing used to hold the ball, it is very unwieldy and expensive to manufacture because of its complicated structure.
  • an aerosol mixture of air and sealant through the hollow needle into the ball, a very large amount of sealant is required, which in the cavity of the ball around the hollow needle must cover the entire flattened area of the ball in a sufficient layer so that it is pulled off the hollow needle can flow from the ball in a sufficient quantity into the relatively large puncture opening and can seal it.
  • the ball If the internal pressure of the ball is only to be slightly increased or even decreased, then after the insertion of the hollow needle, the ball must first be relieved of pressure to such an extent that a correspondingly large amount of mixture of compressed air and sealant can then be supplied again from the aerosol can. Since the ball in the further housing has no lateral guidance and the measuring body acted upon by the compression spring must remain movable with a certain amount of lateral play, it cannot be ruled out that the ball will deflect laterally when inflated, as a result of which lateral forces are exerted on the hollow needle which are exerted only by one correspondingly thick hollow needle can be included.
  • the invention has for its object to develop a hand-held device of the type mentioned so that it can be manufactured and operated in a simple and inexpensive manner and allows the use of hollow needles as thin as possible, through which the amount of sealant required largely and with suitable balls can even be reduced to zero.
  • the ball can be firmly clamped in a hand-held device comprising a single housing, through the handle part of which a commercially available injection syringe is advanced until the injection needle of this syringe has pierced the wall of the ball and protrudes into its interior.
  • the syringe is guided so that the needle penetrates the ball as radially as possible without having to take up additional managers.
  • a hand-held device is light in weight and its grip part, which only receives the injection syringe axially, can easily be dimensioned such that it can be comfortably gripped with one hand of the operator, while with the other hand the injection syringe, if necessary, with the applied sealant through the Longitudinal bore of the handle part is inserted.
  • the plunger of the injection syringe for injecting the sealant into the ball can then be pushed into the syringe barrel and then pulled out again, if necessary, with the same other hand.
  • the handheld device shown in FIGS. 1 to 6 for changing the gas pressure in valveless balls essentially consists of a holding device 1 for a ball 2 which, for example, had too low an internal pressure and, in the illustration of FIG. 1, the desired full after an inflation process Internal pressure has just reached again, a pressure measuring device 3 indicating the internal pressure of the ball, a handle 4 connected to the holding device 1, an injection syringe 5 which can be inserted into the handle 4 in the longitudinal direction, the piston of which is pulled out in FIG. 1, and one to the free end the Injection syringe 5 can be connected to an air pump 7 via a connecting piece 6.
  • the holding device 1 for the ball 2 consists of a square base plate 8 and four mutually parallel, extending perpendicular to the plane of the base plate 8 post 9, each of which is rigidly connected to the base plate 8 at one of the corners thereof.
  • each of the posts 9 has a holding pin 11 with a head 12 widened to a larger diameter, with the aid of which a cover 13 of the holding device 1 can be detachably attached to the post 9.
  • the essentially square cover as shown in FIG. 4, has in the region of its corners one in each case one of the holding pins 11, which runs obliquely inwards and slightly curved guide slot 14.
  • the pins 11 and the slots 14 together form a quick-release fastener for fastening the cover 13 to the post 9 by a simple rotary movement.
  • a feeler pin 17 is guided, which on the ball facing end has a head with a larger diameter, the support surface 18 pointing downward in FIG. 1 is used for support on the ball 2.
  • a helical spring 20 and a perforated disk 19 are threaded onto the feeler pin 17, the perforated disk 19 resting on the underside of the cover 13.
  • the length of these parts is such that when the cover 13 is placed on the post 9, the contact surface 18 comes into contact with a ball 2 located in the holding device 1 and the compression spring 20 is compressed to a greater or lesser extent depending on the internal pressure of the ball 2 in question , wherein the end 21 of the sensor pin 17 opposite the bearing surface 18 is displaced more or less far through the bore 15 in FIG. 1 upwards.
  • the end 21 of the feeler pin 17 thus forms a movable measuring mark, the relative position of which relative to a fixed measuring mark on the cover 13 represents a measure of the pressure prevailing in the ball 2.
  • the sensor pin 17 receives a nut 22 on a threaded section lying in the region of its free end 21 in a correspondingly enlarged section 15a of the bore 15, which nut is fixed by a lock nut 23.
  • the pressure measuring device according to the invention can be calibrated or adjusted to different ball diameters, for example if the upper nut takes over the function of the end 21 of the sensor pin 17 .
  • a handle 25 is attached, which has a bore 15 continuing and coaxially arranged to this bore. As shown in FIG.
  • this bore can be designed as a recess 24 which is open on one side in the radial direction in order to be able to better observe the movement of the free end 21 of the sensor pin 17.
  • the length of the feeler pin 17 is so matched to the axial length of the handle 25 and the spring characteristic of the coil spring 20 that its end 21 is aligned with the outer end face of the handle 25 just when the ball 2 desired internal pressure.
  • the outer end face 26 of the handle 25 forms the above-mentioned fixed measuring mark.
  • an elongated handle 4 is fastened to the base plate 8 such that its longitudinal axis coincides with the longitudinal axis 16 of the holding device 1.
  • This handle 4 consists essentially of a one with its end directly attached to the base plate 8 handle part 27 with a square cross-section and a detachably attached to the other end holding part 28, with the help of which the syringe 5 is held.
  • the holding part 28 has the same cross-sectional dimensions as the handle part 27 and two axially projecting, diametrically opposed guide pins 29, which can be inserted into two recesses 30 of the handle part 27 such that the outer edges of the handle part 27 and the holding part 28 together in the assembled state swear.
  • the entire handle 4 i.e. Both the grip part 27 and the holding part 28 are traversed by a longitudinal bore 31 which is coaxial with the longitudinal axis 16 and which continues in a bore 31a which passes through the base plate 8 and which ends in the surface of the base plate 8 facing the ball 2 with a sharp circular edge 32 .
  • a ball 2 accommodated in the holding device 1 is pressed by the force of the helical spring 20 against the base plate 8 and thus also against the edge 32, which in connection with the edges of the angle pieces 10 resting on the ball leads to such a secure holding of the ball 2, that it is prevented from slipping or rotating even during the inflation process.
  • the inside diameter of the longitudinal bore 31 used to receive the injection syringe 5 is selected to be somewhat larger than the outside diameter of the injection syringe barrel.
  • the inner diameter of the bore 31a continuing the longitudinal bore 31 in the base plate 8 is also somewhat larger than the outer diameter of the syringe barrel.
  • Only the inside diameter of the end section 33 of the longitudinal bore 31 is precisely matched to the outside diameter of the hypodermic syringe barrel, so that the hypodermic syringe has a radial freedom of movement, albeit very small, over most of its length, which facilitates the insertion of the hypodermic syringe 5 into the handle part 27 and in particular, too rigid guidance of the injection needle 35 is avoided.
  • the cylinder of the hypodermic syringe 5 fits snugly in the bore section 33 of the holding part 28 and remains connected to it both when the hypodermic syringe 5 is inserted into the handle part 27 and when it is pulled out.
  • the injection syringe 5 which can be formed, for example, by a conventional insulin syringe, consists of a syringe cylinder 34, in one of which End the thin injection needle 35 is inserted by means of a needle holder 36.
  • the syringe barrel 34 has a radially projecting collar 37 and then an end part 38, the inside diameter of which is somewhat larger than the inside diameter of the rest of the syringe barrel with a beveled transition 40.
  • This extension serves to simplify the introduction of the plunger shown in FIG 39 of the syringe, which is provided on its front stamp part 41, which is integrally connected to the rest of the piston, with a sealing ring 42 held in an annular groove (not shown).
  • the piston 39 inserted into the syringe cylinder 34 completely fills the syringe cylinder 34 up to the needle holder 36 in the inserted state.
  • FIG. 1 it can also be seen that an air pump 7 is used to inflate the ball 2, the axially arranged outlet opening is formed as a threaded bore 43, into which a valve 44, which can be formed, for example, by a so-called patent valve common for bicycles, is screwed is.
  • a valve 44 which can be formed, for example, by a so-called patent valve common for bicycles, is screwed is.
  • a piece of hose 45 is pushed, which together with the valve 44 forms the connecting piece 6 of the air pump 7 and whose inner diameter is adapted to the outer diameter of the valve so that it is held on it by a friction fit.
  • the outer diameter of the hose section 45 is adapted to the inner diameter of the end part 38 of the syringe barrel 34 in such a way that it can be easily inserted into this end part 38 and at the tapering point 40 connecting the end part 38 to the narrower part of the syringe barrel 34, a sufficiently tight connection results.
  • the holding device 1 is held with one hand on the grip part 27, the cover 3 and the holding part 28 first being removed.
  • the ball 2 is inserted between the posts 9 and advanced to the base plate 8, whereupon the cover 13 is placed and locked to the post 9 by means of the holding pins 11.
  • the feeler pin 17 sits with its support surface 18 on the side opposite the base plate 8 on the outer wall of the ball 2, against which it is pressed by the helical spring 20 which is under a certain prestress.
  • the injection syringe 5 inserted into the holding part 28 is filled by immersing the injection needle 35 in a corresponding storage container and pulling back the plunger 39 with about 0.05 ml of a sealant, which preferably consists of a mixture of white spirit and a conventional rubber solution.
  • a sealant which preferably consists of a mixture of white spirit and a conventional rubber solution.
  • the ratio of these two components is chosen so that the resulting viscosity of the mixture allows the sealant to be easily pushed through the injection needle used in each case.
  • the holding part 28 is then placed on the grip part 27, the guide pins 29 engaging in the recesses 30, and then the injection syringe 5 is inserted into the grip part 27 until the injection needle 35 pierces through the wall of the ball 2 into its interior 48 and into the end position protrudes a little bit into the interior 48.
  • the sealant is then injected by pressing the plunger 39 into the syringe barrel 34 into the interior 48 of the ball 2, the holding device 1 being held so that the longitudinal axis 16 is approximately vertical and the ball 2 is located above the injection syringe 5.
  • the plunger 39 is then pulled downward out of the syringe cylinder 34 without the position of the holding device 1 is changed. By withdrawing the piston 39, sealant remaining in the injection needle 35 is sucked back into the syringe barrel 34. By pressing the piston 39 again, these residues are removed with the stamp part 41.
  • the air pump 7 is brought up to the syringe barrel 34 from below and the valve 44 with the hose piece 45 surrounding it is inserted into the end part 38 of the syringe barrel 34.
  • the only short length of the projecting valve 44 allows the hand 4 that encompasses the handle 4 to encompass the bottom end of the air pump 7 and holds both parts together, so that the air pump 7 is actuated with the other hand and thus air can be pumped through the valve 44, the syringe cylinder 34 and the injection needle 35 into the interior 48 of the ball until the desired pressure in the ball 2 is reached, which can be seen in that the upper end 21 of the sensor pin 17 with the outer surface 26 of the handle 25 is aligned.
  • the air pump 7, the holding part 28 and the injection syringe 5 are then pulled down together and separated from the rest of the holding device 1, the sealant flowing out of the lake 47 into the puncture site now released by the injection needle 35 or through the one in the interior 48 Pressure is pressed into the puncture channel and closes it in a sealing manner, so that there is no noticeable pressure drop in the ball 2 by pulling the injection needle 35 out of it.
  • the ball can be removed from the holding device 1 by the posts 9, the air pump 7 can be separated from the syringe cylinder 34 and the handheld device can be prepared for a desired pressure change in another ball in the manner described at the beginning.
  • the desired pressure be slightly exceeded in such an inflation process, which is indicated by the fact that the upper end 21 of the sensor pin 17 protrudes beyond the outer end face 26 of the handle 25, then it is only necessary to remove the air pump 7 somewhat from the end part 38 of the Pull out syringe barrel 34 so that air can escape from the ball 2 via the injection needle 35 and the syringe barrel 34 to the outside.
  • annular plate 49 with an external thread 50 is fastened to the end of the post 9 opposite the base plate 8, onto which a likewise circular cover 13 'in the manner of a cap nut with an internal thread 51 can be screwed.
  • the handle 25 is penetrated here by a transverse groove 52 and has at the top an opening 53 which is narrower than the width of the transverse groove 52, which results in an inwardly projecting edge which can serve as a stationary measuring mark 26a.
  • the movable measuring mark is formed here by a cap nut 22a, which is screwed onto the upper end of the feeler pin 17, not shown here, and is fixed in the same way as the nut 22 in the first embodiment by a lock nut, also not shown.
  • the cap nut 22a and the lock nut do not have to touch each other directly. Rather, the force transmission from one to the other of these two nuts can also take place by a compression spring arranged between them and concentrically surrounding the sensor pin 17.
  • An embodiment of the upper nut as a cap nut 22a offers the advantage that this nut, which also serves as a movable measuring mark, can be fixed in a certain range on the feeler pin 17 in a certain range.
  • the transverse groove 52 open on both sides here takes over the function of the recess 24 open on one side of the exemplary embodiment described in connection with FIGS. 1 to 6 and permits better observation of the movement of the cap nut 22a as long as it is still below the fixed measuring mark 26a.
  • the longitudinal bore 31 penetrating the handle 4 is here of slightly continuous conical shape, tapering so far towards the free end of the handle 4 that the injection syringe (not shown here) in the lower holding part 28 of the handle 4 receives the same holder as in the holding part 28 of the first embodiment.
  • the bore 31a continuing the longitudinal bore 31 in the base plate 8 also has an inner diameter which is larger than the outer diameter of the syringe barrel 34 and preferably is equal to the largest inner diameter of the longitudinal bore 31, so that there is also a smooth transition from one bore to the other results.
  • a transverse groove (not shown in FIG. 7) for introducing a screwdriver can be provided on its upper side.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)
  • Control Of Fluid Pressure (AREA)
  • Coating Apparatus (AREA)
  • Fluid-Driven Valves (AREA)
  • Taps Or Cocks (AREA)

Claims (15)

  1. Appareil à main destiné à faire varier la pression gazeuse des ballons sans clapet, comportant un dispositif de retenue approximativement cylindrique, qui reçoit le ballon en l'empêchant de tourner et qui comprend les pièces constitutives suivantes:
    - une plaque de base qui s'étend transversalement à la direction longitudinale du dispositif de retenue et qui soutient le ballon dont la pression gazeuse doit être modifiée,
    - une aiguille creuse qui, en position de travail, fait saillie par une ouverture centrale de la plaque de base, au-dessus de la surface de la plaque de base qui est orientée vers le ballon et qui, en traversant la paroi du ballon dans lequel elle est piquée, dépasse à l'intérieur de celle-ci,
    - une pièce formant poignée, qui est disposée sur la face de la plaque de base situé à l'opposé du ballon, et qui entoure un conduit servant à l'alimentation ou à la purge du gaz sous pression via l'aiguille creuse, et
    - un dispositif de mesure de pression, comportant un corps de mesure mobile dans le sens axial et qui, en position de travail, est appuyé sur le ballon, sur la face de celui-ci située à l'opposé de la plaque de base, et qui est précontraint contre le ballon au moyen d'un ressort de compression qui s'appuie sur un couvercle du dispositif de retenue, et qui comporte également un repère de mesure mobile, relié au corps de mesure, dont l'alignement avec un repère de mesure fixe relié au dispositif de retenue indique que la pression gazeuse souhaitée dans le ballon est atteinte,
    caractérisé en ce que l'aiguille creuse constitue l'aiguille d'injection (35) d'une seringue d'injection (5) formant, avec son cylindre (34), le conduit d'alimentation, en ce que la pièce (27) formant poignée est reliée à la plaque de base (8) et est traversée par un alésage longitudinal (31) dans lequel peut être introduite la seringue d'injection (5) jusqu'à ce qu'elle vienne en appui sur une butée prévue à l'avance, et
    en ce que, à l'extrémité (38) du cylindre de seringue (34) située à l'opposé de l'aiguille d'injection (35), est mise en place, dès enlèvement du piston, une pièce de liaison (6) d'une pompe à air (7), susceptible d'être raccordée de façon étanche et au moyen de laquelle de l'air comprimé peut être envoyé dans le ballon (2) au moyen de la seringue d'injection (5).
  2. Appareil à main selon la revendication 1, caractérisé en ce que la seringue d'injection (5) est une seringue à jeter du commerce dont l'aiguille d'injection (35) est reliée de façon non amovible au cylindre de seringue (34) et se raccorde directement à celui-ci, et dans laquelle le poinçon (41) est fixé au piston (39).
  3. Appareil à main selon la revendication 1 ou 2, caractérisé en ce que le corps de mesure est une tige palpeuse (17) qui est entourée par le ressort de compression (20), qui traverse le couvercle (13) vers l'extérieur et dont l'extrémité extérieure (21) forme le repère de mesure mobile coopérant avec le repère de mesure fixe (26) qui se trouve sur le couvercle (13).
  4. Appareil à main selon la revendication 3, caractérisé en ce que le repère de mesure mobile est un écrou borgne (22a) vissé de manière réglable sur l'extrémité extérieure de la tige palpeuse (17).
  5. Appareil à main selon l'une des revendications 1 à 4, caractérisé en ce que l'alésage longitudinal (31) comporte un tronçon d'extrémité rétréci (33) dont le diamètre intérieur est adapté au diamètre extérieur du cylindre de seringue (34) de manière telle que la seringue d'injection (5) soit maintenue sans jeu dans la partie d'extrémité (33), en ce que l'alésage longitudinal (31) s'élargit depuis la partie d'extrémité rétrécie (33) jusqu'à la plaque de base (8) et en ce qu'il est prévu, dans la plaque de base (8), un alésage (31a) prolongeant l'alésage longitudinal (31), et dont le plus petit diamètre intérieur est supérieur au diamètre extérieur du cylindre de seringue (34).
  6. Appareil à main selon la revendication 5, caractérisé en ce que la pièce formant poignée (27) présente, à son extrémité située à l'opposé de la plaque de base (8), une pièce de retenue (28) susceptible d'être tirée dans le sens axial, comportant dans le sens axial un alésage qui la traverse et qui, en position de travail, forme une partie de l'alésage longitudinal (31) et entoure le tronçon d'extrémité rétréci de celui-ci.
  7. Appareil à main selon l'une des revendications précédentes, caractérisé en ce que la pièce de liaison (6) comporte un clapet anti-retour (44) qui s'ouvre en direction de la seringue d'injection (5).
  8. Appareil à main selon la revendication 7, caractérisé en ce que le clapet anti-retour (44) est un clapet de bicyclette du commerce, qui est vissée dans un alésage fileté axial de sortie (43) de la pompe à air (7) et en ce que la pièce de liaison (6) est, par ailleurs, constituée par un tronçon de tuyau flexible (45) entourant de façon étanche la zone de raccord du clapet (44), et qui est adaptée à son extrémité libre au diamètre intérieur de la pièce d'extrémité (38) du cylindre de seringue (34).
  9. Appareil à main selon l'une des revendications précédentes, caractérisé en ce que le dispositif de retenue (1) comporte, entre la plaque de base (8) et le couvercle (13), des montants (9) qui enferment le ballon entre-eux.
  10. Appareil à main selon la revendication 9, caractérisé en ce que, sur les montants (9) ou sur des parties de prolongement (10) de ceux-ci, sont prévues des arêtes dirigées radialement vers l'intérieur pour le guidage du ballon (2).
  11. Appareil à main selon la revendication 10, caractérisé en ce que les arêtes dirigées vers l'intérieur constituent, chacune, une partie constitutive d'une cornière (10) maintenue sur le montant concerné (9).
  12. Appareil à main selon la revendication 11, caractérisé en ce que, pour chacun des montants (9), sont prévues plusieurs cornières (12) de différentes épaisseurs de paroi pour compenser les différences de diamètre extérieur des ballons.
  13. Appareil à main selon l'une des revendications 9 à 12, caractérisé en ce que les montants (9) sont reliés rigidement à la plaque de réception (8) et en ce que le couvercle (13) est susceptible d'être fixé sur les montants (9) au moyen d'un organe de fermeture rapide (11, 12, 14).
  14. Appareil à main selon l'une des revendications précédentes, caractérisé en ce que l'ouverture centrale de la plaque de base (8) est munie d'une arête vive (32) du côté orienté vers le ballon (2).
  15. Appareil à main selon l'une des revendications précédentes, caractérisé en ce que la butée sur laquelle vient s'appuyer la seringue d'injection (5), introduite dans la pièce formant poignée (27), est choisie de façon telle que l'aiguille d'injection (35) reste hors du ballon (2) sur une partie de sa longueur.
EP88102580A 1987-03-18 1988-02-22 Appareil pour varier manuellement la pression de balles sans soupapes Expired - Lifetime EP0282767B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88102580T ATE68712T1 (de) 1987-03-18 1988-02-22 Handgeraet zum veraendern des gasdrucks in ventillosen baellen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3708842 1987-03-18
DE19873708842 DE3708842A1 (de) 1987-03-18 1987-03-18 Handgeraet zum veraendern des gasdrucks in ventillosen baellen

Publications (3)

Publication Number Publication Date
EP0282767A2 EP0282767A2 (fr) 1988-09-21
EP0282767A3 EP0282767A3 (en) 1989-05-03
EP0282767B1 true EP0282767B1 (fr) 1991-10-23

Family

ID=6323404

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88102580A Expired - Lifetime EP0282767B1 (fr) 1987-03-18 1988-02-22 Appareil pour varier manuellement la pression de balles sans soupapes

Country Status (5)

Country Link
US (1) US4838007A (fr)
EP (1) EP0282767B1 (fr)
AT (1) ATE68712T1 (fr)
AU (1) AU591387B2 (fr)
DE (2) DE3708842A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19513471A1 (de) * 1995-04-08 1996-10-10 Hans Wenger Erfindung zur Reparatur beschädigter Tennisbälle
AT15317U1 (de) * 2016-02-11 2017-06-15 Wirtitsch Michael Abdicht- und Druckerzeugungsverfahren für Tennisbälle
CN114225345A (zh) * 2021-12-28 2022-03-25 齐鲁师范学院 一种体育用排球快速充气装置

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3921977A (en) * 1974-04-22 1975-11-25 All American Maintenance Inc Tennis ball sealing and inflation means
US3974622A (en) * 1975-06-30 1976-08-17 Stubblefield Jr Fred H Apparatus and method for repressurizing hollow valveless articles
US4114350A (en) * 1976-06-18 1978-09-19 Snyder J Gerald Method and apparatus for adjusting the resilience of a hollow ball having an internal pressure
US4098048A (en) * 1977-01-24 1978-07-04 Kenneth Bruno Sawa Tennis ball pump
US4251073A (en) * 1978-06-26 1981-02-17 Birdsong Jr William D Apparatus and method for manufacturing gas-filled balls with precision
DE3228761A1 (de) * 1982-08-02 1984-03-08 Ladislav 5060 Bergisch Gladbach Koreny Verfahren und vorrichtung zum verbessern des spielverhaltens von baellen

Also Published As

Publication number Publication date
DE3708842A1 (de) 1988-10-06
AU1327288A (en) 1988-09-22
AU591387B2 (en) 1989-11-30
EP0282767A2 (fr) 1988-09-21
EP0282767A3 (en) 1989-05-03
US4838007A (en) 1989-06-13
DE3865708D1 (de) 1991-11-28
ATE68712T1 (de) 1991-11-15

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