EP0282767B1 - Manual device for varying the pressure in valveless balls - Google Patents

Manual device for varying the pressure in valveless balls 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
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EP
European Patent Office
Prior art keywords
ball
syringe
base plate
hand device
injection
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EP88102580A
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German (de)
French (fr)
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EP0282767A2 (en
EP0282767A3 (en
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Bernhard Graf
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Individual
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Individual
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Priority to AT88102580T priority Critical patent/ATE68712T1/en
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Publication of EP0282767A3 publication Critical patent/EP0282767A3/en
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    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B39/00Hollow non-inflatable balls, i.e. having no valves
    • A63B39/02Arrangements for maintaining the pressure
    • A63B39/04Pricking-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)
  • Fluid-Driven Valves (AREA)
  • Taps Or Cocks (AREA)
  • Coating Apparatus (AREA)

Abstract

A hand device for varying the gas pressure in a valve-less ball comprises a holding structure in which the ball is held non-rotatably and an injection syringe which is introduced into a longitudinal bore in a handle of the holding structure. During the introduction movement the hollow needle of the syringe perforates the wall of the ball and finally projects by a portion thereof into the interior of the ball. The syringe can be operated to inject into the ball a sealing agent which has been previously drawn into the injection syringe and then, after the piston has been removed from the syringe, the connecting portion of an air pump may be introduced into the open end of the syringe cylinder to pump the ball up to the desired pressure which is indicated by a pressure measuring arrangement, the injected sealing agent closing off the perforation formed by the needle when the syringe and the air pump are withdrawn from the holding structure.

Description

Die Erfindung betrifft ein Handgerät zum Verändern des Gasdruckes in ventillosen Bällen, insbesondere Tennisbällen, gemäß dem Oberbegriff von Anspruch 1.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.

Bei einem bekannten Handgerät dieser Art, wie es der US-PS 4,114,350 entnehmbar ist, ist die Hohlnadel als ein starker rohrförmiger Teil ausgebildet, der mit seinem Fußteil in eine Querwand eines im wesentlichen zylindrischen Außengehäuses eingeschraubt ist, in das von oben axial zur Hohlnadel verschiebbar ein weiteres zylindrisches Gehäuse eingeführt werden kann, dessen Boden durch die Grundplatte gebildet wird, die den in das weitere Gehäuse seitlich einführbaren Ball abstützt. Oberhalb des Balles befindet sich in dem weiteren Gehäuse ein axial verschiebbarer plattenförmiger Meßkörper, der mittels einer an einem oberen Deckel des weiteren Gehäuses abgestützten Druckfeder gegen den Ball derart vorgespannt ist, daß sich der Ball von Anbeginn an in einer von oben und unten her deutlich zusammengedrückten Lage befindet. Das Außengehäuse bildet unterhalb der Querwand im Griffteil dieses Handgerätes eine Kammer für eine Aerosoldose, die über ein Ventil und eine Zuführleitung durch die Querwand hindurch an die Hohlnadel angeschlossen ist. Wenn das weitere, den Ball aufnehmende Gehäuse in das Außengehäuse von oben her eingeführt wird, durchdringt die Hohlnadel durch eine axiale Bohrung der Grundplatte hindurch die an der Grundplatte anliegende Wand des Balles bis in dessen Innenraum hinein. Wird daraufhin das Ventil der Aerosoldose betätigt, dann strömt eine darin enthaltene Mischung von Druckluft und Dichtungsmittel unter Druck durch die Zuführleitung und die Hohlnadel in den Innenraum des Balls.In a known hand-held device of this type, as can be seen in US Pat. No. 4,114,350, 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. Above the ball there is an axially displaceable plate-shaped measuring body in the further housing, which is biased against the ball by means of a compression spring supported on an upper cover of the further housing in such a way that the ball is compressed from the start in a clearly compressed form from above and below Location. 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.

Wenn das bekannte Gerät bei einer Verwendung mit Tennisbällen oder Bällen ähnlicher Größe auch noch als Handgerät bezeichnet werden kann, so ist es doch mit seinem verhältnismäßig großen, im Griffteil eine Aerosoldose enthaltenden Außengehäuse und dem weiteren, zur Aufnahme des Balls dienenden Gehäuse sehr unhandlich und wegen seines komplizierten Aufbaues in der Herstellung teuer. Durch die Einbringung einer Aerosolmischung von Luft und Dichtungsmittel durch die Hohlnadel in den Ball wird eine sehr große Menge von Dichtungsmittel benötigt, das im Hohlraum des Balles um die Hohlnadel herum den ganzen flachgedrückten Bereich des Balles in einer ausreichenden Schicht bedecken muß, damit es beim Abziehen der Hohlnadel aus dem Ball in einer hinreichenden Menge in die verhältnismäßig große Einstichöffnung hineinfließen und diese abdichten kann. Wenn der Innendruck des Balls nur wenig erhöht oder sogar erniedrigt werden soll, dann muß der Ball nach dem Einstechen der Hohlnadel zunächst so weit druckentlastet werden, daß danach aus der Aerosoldose wieder eine entsprechend große Mischungsmenge von Druckluft und Dichtungsmittel zugeführt werden kann. Da der Ball im weiteren Gehäuse keine seitliche Führung hat und der von der Druckfeder beaufschlagte Meßkörper mit einem gewissen seitlichen Spiel beweglich bleiben muß, ist nicht auszuschließen, daß der Ball beim Aufpumpen seitlich ausweicht, wodurch auf die Hohlnadel Querkräfte ausgeübt werden, die nur von einer entsprechend dicken Hohlnadel aufgenommen werden können. Dies führt zu einer vergleichsweise großen Durchstichsöffnung in der Ballwand, die auch bei Verwendung großer Mengen von Dichtungsmittel nur mit geringer Zuverlässigkeit sicher und dauerhaft wieder verschlossen werden kann. Im übrigen reicht der Inhalt einer im bekannten Handgerät verwendbaren Aerosoldose nur für eine beschränkte Zahl von Aufpumpvorgängen, womit das bekannte Gerät bei häufiger Verwendung beträchtliche laufende Kosten verursacht. Schließlich verändert das für Aerosoldosen erforderliche Treibgas in der Regel die Spieleigenschaften der so behandelten Bälle in ungünstiger Weise, wodurch die Verwendbarkeit des bekannten Handgerätes insbesondere für Tennisbälle stark beeinträchtigt wird.If 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. By introducing 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. 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. This leads to a comparatively large puncture opening in the ball wall which, even when large amounts of sealant are used, can only be securely and permanently closed again with little reliability. Moreover, the content of an aerosol can which can be used in the known hand-held device is only sufficient for a limited number of inflation processes, which means that the known device causes considerable running costs when used frequently. Finally, the propellant gas required for aerosol cans generally changes the playing properties of the balls treated in this way in an unfavorable manner, thereby making the known one usable Handheld device is particularly affected for tennis balls.

Demgegenüber liegt der Erfindung die Aufgabe zugrunde, ein Handgerät der eingangs genannten Art so weiterzubilden, daß es auf einfache und kostengünstige Weise hergestellt und bedient werden kann und die Verwendung von möglichst dünnen Hohlnadeln erlaubt, durch die die Menge des benötigten Dichtungsmittels weitgehend und bei geeigneten Bällen sogar bis auf Null reduziert werden kann.In contrast, 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.

Zur Lösung dieser Aufgabe sieht die Erfindung die im Anspruch 1 zusammengefaßten Merkmale vor.To achieve this object, the invention provides the features summarized in claim 1.

Gemäß der Erfindung kann der Ball in einem ein einziges Gehäuse umfassenden Handgerät fest eingespannt werden, durch dessen Griffteil eine handelsübliche Injektionsspritze so weit vorgeschoben wird, bis die Injektionsnadel dieser Spritze die Wand des Balls durchstochen hat und in dessen Innenraum hineinragt. Dabei wird die Spritze so geführt, daß die Nadel möglichst radial in den Ball eindringt, ohne zusätzliche Führungskräfte aufnehmen zu müssen. Somit entstehen an der Nadel weder beim Einstechen, noch bei dem gegebenenfalls mit Hilfe der Spritze durchführbaren Einspritzen eines Dichtungsmittels, noch bei dem durch den Spritzenzylinder und die Injektionsnadel hindurch erfolgenden Aufpumpen des Balls irgendwelche Querkräfte, die die Nadel verbiegen oder gar abbrechen könnten. Dadurch wird es möglich, extrem dünne Injektionsnadeln zu verwenden, die einen so kleinen Einstichkanal hinterlassen, daß äußerst geringe Mengen von Dichtungsmittel genügen, um diesen Kanal nach dem Herausziehen der Injektionsnadel sicher und dauerhaft so zu verschließen, daß beispielsweise ein derart behandelter Tennisball über längere Zeit wieder turniermäßig gespielt werden kann.According to the invention, 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. Thus, there are no transverse forces on the needle during piercing, nor during the injection of a sealant, which may be carried out with the aid of the syringe, nor during inflation of the ball through the syringe barrel and the injection needle, which could bend or even break the needle. This makes it possible to use extremely thin injection needles which leave such a small puncture channel that extremely small amounts of sealant are sufficient to seal this channel securely and permanently after the injection needle has been pulled out in such a way that, for example, a tennis ball treated in this way for a long time can be played like a tournament again.

Überdies weist ein erfindungsgemäßes Handgerät nur ein geringes Gewicht auf und sein lediglich axial die Injektionsspritze aufnehmender Griffteil kann leicht so dimensioniert werden, daß er bequem mit einer Hand der Bedienungsperson umfaßt werden kann, während mit der anderen Hand die Injektionsspritze gegebenenfalls mit dem aufgezogenen Dichtungsmittel durch die Längsbohrung des Griffteils eingeführt wird. Ebenso kann anschließend erforderlichenfalls mit derselben anderen Hand der Kolben der Injektionsspritze zur Einspritzung des Dichtungsmittels in den Ball in den Spritzenzylinder hineingedrückt und anschließend wieder herausgezogen werden.In addition, a hand-held device according to the invention 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. Likewise, if necessary, 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.

Ebenso einfach ist es, daraufhin die Luftpumpe mit dem angeschlossenen Verbindungsstück in das aus dem Griffteil vorstehende Mundstück des Spritzenzylinders der Injektionsspritze einzuführen, Griffteil und Pumpenende mit ein und derselben Hand festzuhalten und mit der anderen Hand die Luftpumpe zu betätigten. Hierfür kommt eine Luftpumpe in Frage, deren Aufbau dem von Luftpumpen entspricht, wie sie z.B. zum Aufpumpen von Ventilbällen im Handel erhältlich sind, deren Zylinder gegenüber diesen bekannten Pumpen aber vorzugsweise z.B. auf eine Länge von 14 cm verkürzt ist, um eine bessere Handhabbarkeit zu erzielen.It is just as easy to then insert the air pump with the connected connecting piece into the mouthpiece of the syringe barrel of the injection syringe protruding from the grip part, to hold the grip part and pump end with one and the same hand and to actuate the air pump with the other hand. For this, an air pump comes into question, the construction of which corresponds to that of air pumps, such as those e.g. for inflating valve balls are commercially available, but the cylinders of these known pumps are preferably e.g. is shortened to a length of 14 cm in order to achieve better handling.

Somit ergibt sich also ein kleines, leichtes und handliches Gerät, das auf einfache Weise bedient werden kann und bei dem allenfalls nur eine sehr geringe Menge von Dichtungsmittel beim Aufpumpen eines Balls verbraucht wird. Da die Erzeugung des zur Erhöhung des Ballinnendrucks erforderlichen Überdrucks mit Hilfe einer Luftpumpe erfolgt, verursacht sie praktisch keinerlei Betriebskosten.This results in a small, light and handy device that can be operated in a simple manner and in which at most only a very small amount of sealant is used when inflating a ball. Since the excess pressure required to increase the internal ball pressure is generated with the aid of an air pump, it causes practically no operating costs.

Vorteilhafte Weiterbildungen der erfindungsgemäßen Vorrichtung sind in den Unteransprüchen niedergelegt.Advantageous further developments of the device according to the invention are laid down in the subclaims.

Die Erfindung wird im folgenden anhand von Ausführungsbeispielen unter Bezugnahme auf die Zeichnung beschrieben; in dieser zeigt:

Fig. 1
eine erste Ausführungsform eines erfindungsgemäßen Handgerätes mit einem aufgepumpten Ball in einer Seitenansicht,
Fig. 2
eine Draufsicht auf das Handgerät aus Fig. 1, wobei der Deckel des Handgerätes abgenommen ist,
Fig. 3 und 4
die Druckmeßeinrichtung des Handgerätes in einer teilweise geschnittenen Seitenansicht und einer Draufsicht,
Fig. 5 und 6
jeweils in einer Seitenansicht eine Injektionsspritze, die in die Haltevorrichtung des Handgerätes einführbar ist (ohne Kolben) und den zugehörigen Kolben,
Fig. 7
eine zweite Ausführungsform des erfindungsgemäßen Handgerätes in einer vereinfachten Seitenansicht, wobei die gegenüber dem ersten Ausführungsbeispiel abgewandelten Teile auseinandergezogen wiedergegeben sind.
The invention is described below using exemplary embodiments with reference to the drawing; in this shows:
Fig. 1
a first embodiment of a hand-held device according to the invention with an inflated ball in a side view,
Fig. 2
2 shows a top view of the hand-held device from FIG. 1, the cover of the hand-held device being removed,
3 and 4
the pressure measuring device of the handheld device in a partially sectioned side view and a top view,
5 and 6
in each case a side view of an injection syringe which can be inserted into the holding device of the hand-held device (without piston) and the associated piston,
Fig. 7
a second embodiment of the handheld device according to the invention in a simplified side view, wherein the parts modified compared to the first embodiment are shown pulled apart.

Das in den Fig. 1 bis 6 dargestellte Handgerät zum Verändern des Gasdrucks in ventillosen Bällen besteht im wesentlichen aus einer Haltevorrichtung 1 für einen Ball 2, der beispielsweise einen zu geringen Innendruck hatte und in der Darstellung der Fig. 1 nach einem Aufpumpvorgang den gewünschten vollen Innendruck gerade wieder erreicht hat, einer den Innendruck des Balls anzeigenden Druckmeßeinrichtung 3, einem mit der Haltevorrichtung 1 verbundenen Handgriff 4, einer in den Handgriff 4 in Längsrichtung einführbaren Injektionsspritze 5, deren Kolben in Fig. 1 herausgezogen ist, und einer an das freie Ende der Injektionsspritze 5 über ein Verbindungsstück 6 anschließbaren Luftpumpe 7.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.

Die Haltevorrichtung 1 für den Ball 2 besteht aus einer quadratischen Grundplatte 8 und vier zueinander parallel angeordneten, sich senkrecht zur Ebene der Grundplatte 8 erstreckenden Pfosten 9, von denen jeder an einer der Ecken der Grundplatte 8 mit dieser starr verbunden ist. Die im Querschnitt quadratischen Pfosten 9, zwischen die der Ball 2 bis zum Anliegen an der Grundplatte 8 eingeführt werden kann, bilden jeweils mit ihrer radial zum Ball 2 einwärts gerichteten Seitenkante eine Führungskante 9ʹ, die jedoch bei dem dargestellten Ausführungsbeispiel nicht unmittelbar am Ball 2 anliegt. Vielmehr verläuft entlang jeder Führungskante 9ʹ noch ein lösbar gehaltenes Winkelstück 10, das eine solche Wandstärke besitzt, daß der Ball 2 zwischen den Kanten der Winkelstücke 10 auf der Grundplatte 8 drehfest gehalten ist. Dies eröffnet die Möglichkeit, die Haltevorrichtung 1 auch für gegenüber dem dargestellten Ball 2 noch etwas größere Bälle zu verwenden, wobei dann die Winkelstücke 10 weggelassen werden. Sollen in der Haltevorrichtung 1 noch kleinere Bälle als der dargestellte Ball 2 aufgenommen werden, so können die dargestellten Winkelstücke 10 (siehe auch Fig. 2) durch andere Winkelstücke mit größerer Wandstärke ersetzt werden. An seinem von der Grundplatte 8 abgewandten Ende weist jeder der Pfosten 9 einen Haltestift 11 mit einem auf einen größeren Durchmesser erweiterten Kopf 12 auf, mit deren Hilfe ein Deckel 13 der Haltevorrichtung 1 lösbar an den Pfosten 9 befestigt werden kann.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. The cross-sectionally square posts 9, between which the ball 2 can be inserted until it rests against the base plate 8, each form a leading edge 9ʹ with their side edge directed radially inward to the ball 2, which, however, does not bear directly on the ball 2 in the exemplary embodiment shown . Rather, along each leading edge 9ʹ still runs a releasably held angle piece 10, which has such a wall thickness that the ball 2 is held on the base plate 8 in a rotationally fixed manner between the edges of the angle pieces 10. This opens up the possibility of also using the holding device 1 for balls which are still somewhat larger than the ball 2 shown, the angle pieces 10 then being omitted. If even smaller balls than the ball 2 shown are to be accommodated in the holding device 1, the angle pieces 10 shown (see also FIG. 2) can be replaced by other angle pieces with a larger wall thickness. At its end facing away from the base plate 8, 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.

Der im wesentlichen quadratische Deckel weist, wie in Fig. 4 dargestellt, im Bereich seiner Ecken je einen, jeweils einem der Haltestifte 11 zugeordneten, schräg einwärts verlaufenden und leicht gekrümmten Führungsschlitz 14 auf. Die Stifte 11 und die Schlitze 14 bilden gemeinsam einen Schnellverschluß zum Befestigen des Deckels 13 an den Pfosten 9 durch eine einfache Drehbewegung. In einer durchgehenden Bohrung 15 des Deckels 13, deren Achse im zusammengesetzten Zustand der Haltevorrichtung 1 mit der durch die Mitte des Balles 2 und die Mitte der Grundplatte 8 verlaufenden Längsachse 16 der Haltevorrichtung 1 zusammenfällt, ist ein Fühlerstift 17 geführt, der an seinem dem Ball zugewandten Ende einen Kopf mit größerem Durchmesser aufweist, dessen in Fig. 1 nach unten weisende Auflagefläche 18 zur Auflage auf dem Ball 2 dient. Auf den Fühlerstift 17 sind eine Schraubenfeder 20 und eine Lochscheibe 19 aufgefädelt, wobei die Lochscheibe 19 an der Unterseite des Deckels 13 anliegt. Die Länge dieser Teile ist so bemessen, daß beim Aufsetzen des Deckels 13 auf die Pfosten 9 die Anlagefläche 18 an einem in der Haltevorrichtung 1 befindlichen Ball 2 zur Anlage kommt und die Druckfeder 20 je nach Innendruck des betreffenden Balls 2 mehr oder weniger stark zusammengedrückt wird, wobei das der Auflagefläche 18 gegenüberliegende Ende 21 des Fühlerstiftes 17 mehr oder weniger weit durch die Bohrung 15 hindurch in Fig. 1 nach oben verschoben wird. Das Ende 21 des Fühlerstiftes 17 bildet somit eine bewegliche Meßmarke, deren relative Lage bezüglich einer feststehenden Meßmarke am Deckel 13 ein Maß für den im Ball 2 herrschenden Druck darstellt.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. In a continuous bore 15 of the cover 13, the axis of which coincides in the assembled state of the holding device 1 with the longitudinal axis 16 of the holding device 1 running through the center of the ball 2 and the center of the base plate 8, 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.

Damit der Fühlerstift 17 bei abgenommenem Deckel 13 von diesem nicht abfallen kann, nimmt der Fühlerstift 17 an einem im Bereich seines freien Endes 21 liegenden Gewindeabschnitt in einem entsprechend erweiterten Abschnitt 15a der Bohrung 15 eine Mutter 22 auf, die durch eine Kontermutter 23 festgelegt ist. Durch Veränderung des Abstandes dieser Mutter 22 und 23 von dem die Auflagefläche 18 aufweisenden Kopf des Fühlerstiftes 17 und durch die Wahl einer geeigneten Schraubenfeder 20 kann die erfindungsgemäße Druckmeßvorrichtung geeicht bzw. auf unterschiedliche Balldurchmesser eingestellt werden,wenn z.B. die obere Mutter die Funktion des Endes 21 des Fühlerstiftes 17 übernimmt. Auf der Außenseite des Deckels 13 ist ein Griffstück 25 befestigt, das eine die Bohrung 15 fortsetzende und zu dieser koaxial angeordnete Bohrung aufweist. Diese Bohrung kann, wie in Fig. 4 dargestellt, als in radialer Richtung einseitig offene Ausnehmung 24 ausgebildet sein, um die Bewegung des freien Endes 21 des Fühlerstiftes 17 besser beobachten zu können. Bei dem in Fig. 1 wiedergegebenen Ausführungsbeispiel ist die Länge des Fühlerstiftes 17 so auf die axiale Länge des Griffstückes 25 und die Federcharakteristik der Schraubenfeder 20 abgestimmt, daß sein Ende 21 gerade dann mit der äußeren Stirnfläche des Griffstückes 25 fluchtet, wenn der Ball 2 den gewünschten Innendruck aufweist. Somit bildet die äußere Stirnfläche 26 des Griffstückes 25 die oben bereits erwähnte feststehende Meßmarke.So that the sensor pin 17 cannot fall off the cover 13 when it is removed, 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. By changing the distance This nut 22 and 23 of the head of the sensor pin 17 having the bearing surface 18 and by the choice of a suitable coil spring 20, 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 . On the outside of the lid 13, a handle 25 is attached, which has a bore 15 continuing and coaxially arranged to this bore. As shown in FIG. 4, 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. In the embodiment shown in Fig. 1, 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. Thus, the outer end face 26 of the handle 25 forms the above-mentioned fixed measuring mark.

Auf der den Pfosten 9 gegenüberliegenden Seite ist an der Grundplatte 8 ein langgestreckter Handgriff 4 so befestigt, daß seine Längsachse mit der Längsachse 16 der Haltevorrichtung 1 zusammenfällt. Dieser Handgriff 4 besteht im wesentlichen aus einem mit seinem einen Ende unmittelbar an der Grundplatte 8 befestigten Griffteil 27 mit quadratischem Querschnitt und einem an dessen anderem Ende lösbar befestigten Halteteil 28, mit dessen Hilfe die Injektionsspritze 5 gehalten wird. Das Halteteil 28 besitzt die gleichen Querschnittsabmessungen wie der Griffteil 27 und zwei in axialer Richtung vorstehende, einander diametral gegenüber angeordnete Führungsstifte 29, die in zwei Ausnehmungen 30 des Griffteils 27 so einführbar sind, daß im zusammengebauten Zustand die Außenkanten von Griffteil 27 und Halteteil 28 miteinander fluchten.On the side opposite the post 9, 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.

Wie aus Fig. 1 weiterhin hevorgeht, ist der ganze Handgriff 4, d.h. sowohl der Griffteil 27 als auch der Halteteil 28 von einer zur Längsachse 16 koaxialen Längsbohrung 31 durchzogen, die sich in einer durch die Grundplatte 8 hindurchgehenden Bohrung 31a fortsetzt, die in der dem Ball 2 zugewandten Fläche der Grundplatte 8 mit einer scharfen kreisförmigen Kante 32 endet. Ein in der Haltevorrichtung 1 aufgenommener Ball 2 wird durch die Kraft der Schraubenfeder 20 gegen die Grundplatte 8 und damit auch gegen die Kante 32 gedrückt, was in Verbindung mit den am Ball anliegenden Kanten der Winkelstücke 10 zu einer derart sicheren Halterung des Balles 2 führt, daß er auch während des Aufpumpvorganges daran gehindert wird, zu verrutschen oder sich zu drehen.As continues from Fig. 1, 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.

Der Innendurchmesser der zur Aufnahme der Injektionsspritze 5 dienenden Längsbohrung 31 ist mit Ausnahme eines im Halteteil 28 befindlichen Endabschnittes 33 etwas größer gewählt als der Außendurchmesser des Injektionsspritzenzylinders. Auch der Innendurchmesser der die Längsbohrung 31 fortsetzenden Bohrung 31a in der Grundplatte 8 ist etwas größer als der Außendurchmesser des Spritzenzylinders. Lediglich der Innendurchmesser des Endabschnittes 33 der Längsbohrung 31 ist genau auf den Außendurchmesser des Injektionsspritzenzylinders abgestimmt, so daß die Injektionsspritze über den größten Teil ihrer Länge eine, wenn auch sehr kleine radiale Bewegungsfreiheit besitzt, wodurch das Einführen der Injektionsspritze 5 in den Griffteil 27 erleichtert und insbesondere eine zu starre Führung der Injektionsnadel 35 vermieden wird. Dadurch besteht keine Gefahr,daß die Injektionsnadel 35 beim Einführen der Injektionsspritze 5 in die Längsbohrung 31 verbogen oder abgebrochen werden kann. Dies wird dadurch unterstützt, daß ein Teil der Injektionsnadel 35 außerhalb des Balles 2 bleibt. Der Zylinder der Injektionsspritze 5 sitzt paßgenau im Bohrungsabschnitt 33 des Halteteils 28 und bleibt mit diesem sowohl beim Einführen der Injektionsspritze 5 in den Griffteil 27 als auch bei ihrem Herausziehen verbunden.With the exception of an end section 33 located in the holding part 28, 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. As a result, there is no danger that the injection needle 35 can be bent or broken off when the injection syringe 5 is inserted into the longitudinal bore 31. This is supported by the fact that part of the injection needle 35 remains outside the ball 2. 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.

Gemäß den Fig. 5 und 6 besteht die Injektionsspritze 5, die beispielsweise von einer üblichen Insulinspritze gebildet werden kann, aus einem Spritzenzylinder 34, in dessen eines Ende die dünne Injektionsnadel 35 mittels einer Nadelhalterung 36 eingesetzt ist. An seinem anderen Ende weist der Spritzenzylinder 34 einen radial abstehenden Kragen 37 und daran anschließend ein Endteil 38 auf, dessen Innendurchmesser etwas größer ist als der Innendurchmesser des übrigen Spritzenzylinders mit abgeschrägtem Übergang 40. Diese Erweiterung dient der einfacheren Einführung des in Fig. 6 dargestellten Kolbens 39 der Spritze, der an seinem vorderen mit dem Rest des Kolbens einstückig verbundenen Stempelteil 41 mit einem in einer nicht dargestellten Ringnut gehaltenen Dichtring 42 versehen ist. Der in den Spritzenzylinder 34 eingeführte Kolben 39 füllt im eingeschobenen Zustand den Spritzenzylinder 34 vollständig bis zur Nadelhalterung 36 aus.5 and 6, 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. At its other end, 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.

Aus Fig. 1 ist weiterhin ersichtlich, daß zum Aufpumpen des Balles 2 eine Luftpumpe 7 verwendet wird, deren axial angeordnete Austrittsöffnung als Gewindebohrung 43 ausgebildet ist, in die ein Ventil 44, das beispielsweise von einem für Fahrräder üblichen sogenannten Patentventil gebildet werden kann, eingeschraubt ist. Auf den frei vorstehenden Teil des Ventils 44 ist ein Schlauchstück 45 aufgeschoben, das zusammen mit dem Ventil 44 das Verbindungsstück 6 der Luftpumpe 7 bildet und dessen Innendurchmesser an den Außendurchmesser des Ventils so angepaßt ist, daß es auf diesem durch Reibsitz gehalten wird. Der Außendurchmesser des Schlauchstückes 45 ist so an den Innendurchmesser des Endteils 38 des Spritzenzylinders 34 angepaßt, daß es ohne weiteres in diesen Endteil 38 eingeschoben werden kann und sich an der den Endteil 38 mit dem engeren Teil des Spritzenzylinders 34 verbindenden Verjüngungsstelle 40 eine hinreichend dichte Verbindung ergibt.From 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. On the freely projecting part of the valve 44, 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.

Soweit sich die Verwendung des erfindungsgemäßen Handgerätes nicht bereits aus der vorausgehenden Beschreibung ergibt, soll sie im folgenden nochmals zusammengefaßt dargestellt werden.Insofar as the use of the hand-held device according to the invention does not already result from the preceding description, it should be summarized again below.

Zur Druckeinstellung eines Balles wird die Haltevorrichtung 1 mit einer Hand am Griffteil 27 gehalten, wobei zunächst der Deckel 3 und der Halteteil 28 abgenommen sind. Mit der zweiten Hand wird der Ball 2 zwischen die Pfosten 9 eingeführt und bis zur Grundplatte 8 vorgeschoben, worauf der Deckel 13 aufgesetzt und mittels der Haltestifte 11 an den Pfosten 9 verriegelt wird. In dieser Lage sitzt der Fühlerstift 17 mit seiner Auflagefläche 18 auf der der Grundplatte 8 gegenüberliegenden Seite auf der Außenwand des Balles 2 auf, gegen die er durch die unter einer gewissen Vorspannung stehenden Schraubenfeder 20 angedrückt wird.To adjust the pressure of a ball, 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. With the second hand, 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. In this position, 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.

Hierauf wird die in den Halteteil 28 eingeschobene Injektionsspritze 5 durch Eintauchen der Injektionsnadel 35 in einen entsprechenden Vorratsbehälter und Zurückziehen des Kolbens 39 mit etwa 0,05 ml eines Dichtungsmittels gefüllt, das vorzugsweise aus einer Mischung von Waschbenzin und einer üblichen Gummilösung besteht. Das Verhältnis dieser beiden Komponenten wird so gewählt, daß die sich ergebende Viskosität der Mischung ein problemloses Hindurchdrücken des Dichtungsmittels durch die jeweils verwendete Injektionsnadel erlaubt. Anschließend wird der Halteteil 28 an den Griffteil 27 angelegt, wobei die Führungsstifte 29 in die Ausnehmungen 30 eingreifen, und dann wird die Injektionsspritze 5 in den Griffteil 27 eingeführt, bis die Injektionsnadel 35 durch die Wand des Balls 2 in dessen Innenraum 48 durchsticht und in der Endlage ein kleines Stück in den Innenraum 48 hineinragt.
Hierauf wird das Dichtungsmittel durch Eindrücken des Kolbens 39 in den Spritzenzylinder 34 in den Innenraum 48 des Balls 2 eingespritzt, wobei die Haltevorrichtung 1 so gehalten wird, daß die Längsachse 16 in etwa senkrecht steht und sich der Ball 2 über der Injektionsspritze 5 befindet. Dadurch sammelt sich in der aus Fig. 1 ersichtlichen Weise das eingespritzte Dichtungsmittel im unteren Bereich des Ballinnenraums 48 und bildet um die vorstehende Injektionsnadel 5 herum einen kleinen See 47. Anschließend wird der Kolben 39 nach unten aus dem Spritzenzylinder 34 herausgezogen, ohne daß die Lage der Haltevorrichtung 1 verändert wird. Durch das Zurückziehen des Kolbens 39 wird in der Injektionsnadel 35 verbliebenes Dichtungsmittel in den Spritzenzylinder 34 zurückgesaugt. Durch nochmaliges Eindrücken des Kolbens 39 werden diese Reste mit dem Stempelteil 41 entfernt.
Then 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. 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. This collects 1, the injected sealant in the lower region of the ball interior 48 and forms a small lake 47 around the projecting injection needle 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.

Als nächstes wird die Luftpumpe 7 von unten an den Spritzenzylinder 34 herangeführt und das Ventil 44 mit dem es umgebenden Schlauchstück 45 in das Endteil 38 des Spritzenzylinders 34 eingeführt. Die nur kurze Länge des vorstehenden Ventils 44 läßt es zu, daß die den Handgriff 4 umfassende Hand nunmehr zugleich auch noch das unten anschließende Ende der Luftpumpe 7 umfaßt und beide Teile gemeinsam festhält, so daß die Luftpumpe 7 mit der anderen Hand betätigt und somit Luft durch das Ventil 44, den Spritzenzylinder 34 und die Injektionsnadel 35 hindurch in den Innenraum 48 des Balls hineingepumpt werden kann, bis der gewünschte Druck im Ball 2 erreicht ist, was dadurch erkennbar ist, daß das obere Ende 21 des Fühlerstiftes 17 mit der äußeren Oberfläche 26 des Griffstückes 25 fluchtet.Next, 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.

Danach werden die Luftpumpe 7, der Halteteil 28 und die Injektionsspritze 5 gemeinsam nach unten gezogen und von der restlichen Haltevorrichtung 1 getrennt, wobei das Dichtungsmittel aus dem See 47 in die nunmehr von der Injektionsnadel 35 freigegebene Einstichstelle hineinfließt bzw. durch den im Innenraum 48 herrschenden Druck in den Einstichskanal hineingepreßt wird und diesen dichtend verschließt, so daß durch das Herausziehen der Injektionsnadel 35 aus dem Ball 2 in diesem kein merklicher Druckabfall entsteht.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.

Anschließend kann der Ball nach Abnahme des Deckels 13 von den Pfosten 9 aus der Haltevorrichtung 1 entnommen, die Luftpumpe 7 vom Spritzenzylinder 34 getrennt und das Handgerät in der eingangs beschriebenen Weise zu einer gewünschten Druckänderung in einem anderen Ball vorbereitet werden. Sollte bei einem solchen Aufpumpvorgang der gewünschte Druck etwas überschritten werden, was dadurch angezeigt wird, daß das obere Ende 21 des Fühlerstiftes 17 über die äußere Stirnfläche 26 des Griffstückes 25 vorsteht, dann ist es lediglich erforderlich, die Luftpumpe 7 etwas aus dem Endteil 38 des Spritzenzylinders 34 herauszuziehen, damit Luft aus dem Ball 2 über die Injektionsnadel 35 und den Spritzenzylinder 34 nach außen entweichen kann.Then, after removing the cover 13, 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. Should 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.

Bei der in Fig. 7 dargestellten weiteren Ausführungsform des Handgerätes 1 ist an dem der Grundplatte 8 gegenüberliegenden Ende der Pfosten 9 eine Ringplatte 49 mit einem Außengewinde 50 befestigt, auf die ein ebenfalls kreisförmiger Deckel 13ʹ in Art einer Hutmutter mit einem Innengewinde 51 aufschraubbar ist. Das Griffstück 25 ist hier von einer Quernut 52 durchsetzt und weist oben eine gegenüber der Breite der Quernut 52 schmalere Öffnung 53 auf, wodurch sich ein nach innen vorspringender Rand ergibt, der als ortsfeste Meßmarke 26a dienen kann. Die bewegliche Meßmarke wird hier von einer Hutmutter 22a gebildet, die auf das obere Ende des hier nicht dargestellten Fühlerstiftes 17 aufgeschraubt und in gleicher Weise wie die Mutter 22 beim ersten Ausführungsbeispiel durch eine ebenfalls nicht dargestellte Kontermutter festgelegt ist. Dabei müssen die Hutmutter 22a und die Kontermutter einander nicht unmittelbar berühren. Vielmehr kann die Kraftübertragung von der einen auf die andere dieser beiden Muttern auch durch eine zwischen ihnen angeordnete, den Fühlerstift 17 konzentrisch umgebende Druckfeder erfolgen. Eine Ausbildung der oberen Mutter als Hutmutter 22a bietet den Vorteil, daß diese gleichzeitig als bewegliche Meßmarke dienende Mutter am Fühlerstift 17 in einem gewissen Bereich längenverstellbar festgelegt werden kann. Die nach beiden Seiten offene Quernut 52 übernimmt hier die Funktion der einseitig offenen Ausnehmung 24 des im Zusammenhang mit den Fig. 1 bis 6 beschriebenen Ausführungsbeispiels und erlaubt eine bessere Beobachtung der Bewegung der Hutmutter 22a, solange diese sich noch unterhalb der festen Meßmarke 26a befindet.In the further embodiment of the hand-held device 1 shown in FIG. 7, an 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.

Wie aus Fig. 7 weiterhin hervorgeht, ist die den Handgriff 4 durchsetzende Längsbohrung 31 hier durchgehend schwach konisch ausgebildet, wobei sie sich zum freien Ende des Handgriffes 4 hin so weit verjüngt, daß die (hier nicht dargestellte) Injektionsspritze im unteren Halteteil 28 des Handgriffes 4 die gleiche Halterung wie im Halteteil 28 des ersten Ausführungsbeispiels erhält. Die die Längsbohrung 31 in der Grundplatte 8 fortsetzende Bohrung 31a besitzt auch hier einen Innendurchmesser, der größer als der Außendurchmesser des Spritzenzylinders 34 und vorzugsweise gleich dem größten Innendurchmesser der Längsbohrung 31 ist, so daß sich ebenfalls ein stufenloser Übergang von der einen Bohrung in die andere ergibt.As can further be seen from FIG. 7, 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.

Damit die sich zwischen bzw. innerhalb der feststehenden Meßmarken 26a befindende Hutmutter 22a auf einfache Weise gegenüber dem Fühlerstift 17 verdreht werden kann, kann an ihrer Oberseite eine in Fig. 7 nicht dargestellte Quernut zur Einführung eines Schraubenziehers vorgesehen sein.So that the cap nut 22a located between or within the fixed measuring marks 26a can be rotated in a simple manner with respect to the feeler pin 17, a transverse groove (not shown in FIG. 7) for introducing a screwdriver can be provided on its upper side.

Es hat sich gezeigt, daß aufgrund der erfindungsgemäßen Ausbildung der Haltevorrichtung 1 Injektionsspritzen mit besonders dünnen Injektionsnadeln verwendet werden können. Bei bestimmten Bällen hat dies zur Folge, daß ein hinreichend dichter und anhaltender Verschluß der Einstichöffnung nach dem Herausziehen der Injektionsnadel aus dem Ball auch schon dann erzielt werden kann, wenn auf das Einspritzen eines Dichtungsmittels verzichtet wird.It has been shown that, based on the design of the holding device according to the invention, 1 injection syringes with particularly thin injection needles can be used. With certain balls this has the consequence that a sufficiently tight and lasting closure of the puncture opening can be achieved even after the injection needle has been pulled out of the ball, if the injection of a sealant is dispensed with.

Claims (15)

  1. A hand device for varying the gas pressure in valve-less balls comprising an about cylindrical holding means for non-rotatably accomodating a ball, and including the following elements:
    - a base plate extending transversely with respect to the longitudinal direction of the holding means and supporting the ball the gas pressure of which is to be varied,
    - a hollow needle which, in the operative position, projects through a central opening of the base plate beyond the surface of the base plate facing the ball, said needle extending into the interior of the ball through the wall of the ball pierced by it,
    - a handle portion being arranged on the side of the base plate, which side is in opposite relationship to the ball, and surrounding a conduit which serves for supplying or discharging pressure gas through the hollow needle, and
    - a pressure measuring means comprising a measuring member which is movable in an axial direction, which, in the operative position bears against the ball on the side thereof which is in opposite relationship to the base plate, and which is biased against the ball by means of a compression spring supported by a lid of the holding means, and further comprising a movable measuring mark which is connected to the measuring member, the alignment of the movable measuring mark with a stationary measuring mark which is connected to the holding means indicating that the desired pressure in the ball is attained,
    characterized in that the hollow needle is the injection needle (35) of an injection syringe (5) the syringe cylinder (34) of which forms the supplyig conduit,
    in that the handle portion (27) is connected to the base plate (8), a longitudinal bore (31) extending therethrough into which the injection syringe (5) can be inserted until it is in an abutment position against a predetermined abutment, and
    in that with the end part (38) of the syringe cylinder (34), which end part is in opposite relationship to the injection needle (35), is associated a sealingly connectable connecting member (6) of an air pump, when the piston (39) of the syringe is removed, by which air pump compressed air can be supplied to the ball (2) through the injection syringe (5).
  2. A hand device according to claim 1, characterized in that the injection syringe (5) is a disposable syringe of normal commercial usage whose injection needle (35) is non-releasably connected to the syringe cylinder (34) and directly adjoins same and whose plunger (41) is fixedly connected to the piston (39) of the syringe.
  3. A hand device according to claims 1 or 2, characterized in that the measuring member is a sensor pin (17) being surrounded by the compression spring (20) and passing outwardly through the lid (13), the outer end (21) of the sensor pin being the movable measuring mark operatively working together with the stationary measuring mark (26) which is disposed on the lid (13).
  4. A hand device according to claim 3, characterized in that the movable measuring mark is a cap nut (22a) screwed adjustably on the outer end portion of the sensor pin (17).
  5. A hand device according to any one of claims 1 to 4, characterized in that the longitudinal bore (31) has a reduced end portion (33) whose inside diameter is adapted to the outside diameter of the syringe cylinder (34) in such a way that the injection syringe (5) is held without play in said end portion (33), in that the longitudinal bore (31) increases in width from the reduced end portion (33) towards the base plate (8), and in that in the base plate (8) is provided a bore (31a) which extends said longitudinal bore (31) and whose smallest inside diameter is larger than the outside diameter of the syringe cylinder (34).
  6. A hand device according to claim 5, characterized in that the handle portion (27) at its end remote from the base plate (8) has a holding portion (28) which can be pulled off in the axial direction and which has a bore extending therethrough in the axial direction, said bore in the holding portion forming in the operative position a part of said longitudinal bore (31) and surrounding the reduced end portion (33) thereof.
  7. A hand device according to any preceding claim, characterized in that the connecting member (6) comprises a non-return valve (44) operable to open towards the injection syringe (5).
  8. A hand device according to claim 7, characterized in that the non-return valve (44) is a bicycle valve of normal commercial usage which is screwed into an axial screwthreaded discharge bore (43) of the air pump (7) and in that the connecting member (6) also comprises an elastic tube portion (45) which sealingly embraces the connecting region of the valve (44) and which is adapted at its free end to the inside diameter of the end portion (38) of the syringe cylinder (34).
  9. A hand device according to any preceding claim, characterized in that between the base plate (8) and the lid (13) the holding means (1) has posts (9) for enclosing the ball between them.
  10. A hand device according to claim 9, characterized in that on the posts (9) or on supplementary parts (10) thereof radially inwardly directed edges are provided for guiding the ball (2).
  11. A hand device according to claim 10, characterized in that each radially inwardly directed edge is a component of an angle portion (10) mounted to the respective post (9).
  12. A hand device according to claim 11, characterized in that a plurality of angle portions (10) of different gauges are provided for each of the posts (9), thereby to compensate for different ball diameters.
  13. A hand device according to any of claims 9 to 12, characterized in that the posts (9) are rigidly connected to the base plate (8) and the lid (13) is connectable to the posts (9) by quick-release fastening means (11, 12, 14).
  14. A hand device according to any preceding claim, characterized in that the central opening in the base plate (8) is provided with a sharp edge (32) on the side which is towards the ball (2).
  15. A hand device according to any preceding claim, characterized in that the abutment against which the injection syringe (5) comes to rest when it is inserted into the handle portion (27) is so selected that the injection needle (35) remains with a part of its length outside the ball (2).
EP88102580A 1987-03-18 1988-02-22 Manual device for varying the pressure in valveless balls Expired - Lifetime EP0282767B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88102580T ATE68712T1 (en) 1987-03-18 1988-02-22 HANDHELD DEVICE FOR CHANGING THE GAS PRESSURE IN VALVELESS BALLS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873708842 DE3708842A1 (en) 1987-03-18 1987-03-18 HAND DEVICE FOR CHANGING THE GAS PRESSURE IN VALVE-FREE BAELLS
DE3708842 1987-03-18

Publications (3)

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

Family

ID=6323404

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88102580A Expired - Lifetime EP0282767B1 (en) 1987-03-18 1988-02-22 Manual device for varying the pressure in valveless balls

Country Status (5)

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

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19513471A1 (en) * 1995-04-08 1996-10-10 Hans Wenger Tennis ball prodn. by injection of liquid rubber and air into interior
AT15317U1 (en) * 2016-02-11 2017-06-15 Wirtitsch Michael Sealing and pressure generating method for tennis balls
CN114225345A (en) * 2021-12-28 2022-03-25 齐鲁师范学院 Quick aerating device of volleyball for sports

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 (en) * 1982-08-02 1984-03-08 Ladislav 5060 Bergisch Gladbach Koreny Method and device for improving the playing behaviour of balls

Also Published As

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

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