DE4127500C1 - Bicycle spoked wheel with cavity rim - has nipple with axis-parallel multi-slit head held locked in outer wall, on insertion through cavity outer wall - Google Patents

Bicycle spoked wheel with cavity rim - has nipple with axis-parallel multi-slit head held locked in outer wall, on insertion through cavity outer wall

Info

Publication number
DE4127500C1
DE4127500C1 DE19914127500 DE4127500A DE4127500C1 DE 4127500 C1 DE4127500 C1 DE 4127500C1 DE 19914127500 DE19914127500 DE 19914127500 DE 4127500 A DE4127500 A DE 4127500A DE 4127500 C1 DE4127500 C1 DE 4127500C1
Authority
DE
Germany
Prior art keywords
head
wall
nipple
rim
cavity
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 - Fee Related
Application number
DE19914127500
Other languages
German (de)
Inventor
Des Erfinders Auf Nennung Verzicht
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fw Broekelmann Aluminiumwerk & Co 4763 Ense De GmbH
Original Assignee
Fw Broekelmann Aluminiumwerk & Co 4763 Ense De GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fw Broekelmann Aluminiumwerk & Co 4763 Ense De GmbH filed Critical Fw Broekelmann Aluminiumwerk & Co 4763 Ense De GmbH
Priority to DE19914127500 priority Critical patent/DE4127500C1/en
Application granted granted Critical
Publication of DE4127500C1 publication Critical patent/DE4127500C1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60BVEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B21/00Rims
    • B60B21/06Rims characterised by means for attaching spokes, i.e. spoke seats
    • B60B21/062Rims characterised by means for attaching spokes, i.e. spoke seats for bicycles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60BVEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B1/00Spoked wheels; Spokes thereof
    • B60B1/02Wheels with wire or other tension spokes
    • B60B1/04Attaching spokes to rim or hub
    • B60B1/041Attaching spokes to rim or hub of bicycle wheels
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60BVEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B1/00Spoked wheels; Spokes thereof
    • B60B1/02Wheels with wire or other tension spokes
    • B60B1/04Attaching spokes to rim or hub
    • B60B1/043Attaching spokes to rim
    • B60B1/044Attaching spokes to rim by the use of spoke nipples
    • B60B1/045Attaching spokes to rim by the use of spoke nipples characterised by their specific shape
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60BVEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B21/00Rims
    • B60B21/02Rims characterised by transverse section
    • B60B21/025Rims characterised by transverse section the transverse section being hollow
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60BVEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B21/00Rims
    • B60B21/02Rims characterised by transverse section
    • B60B21/04Rims characterised by transverse section with substantially radial flanges

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Tires In General (AREA)

Abstract

The spoked wheel has a rim with a hollow chamber, to which the spokes can be screwed in tension, when their nipple tips are led through the chamber wall. The nipple tips (2) have a head (21) which is slit in axis parallel direction at several places. It is held latched in place, when the flexible head is compressed and led through the hole (16) in the chamber (11) outer wall (12). Preferably, the orthogonal slits are used in the head. USE/ADVANTAGE - For bicycle wheels, with improved and easy assembly.d

Description

Die Erfindung betrifft ein Speichenrad für Fahrräder mit einer Hohlkammerfelge und daran mittels Kopfnippeln, die durch die Außenwand der Hohlkammer ragen, durch Einschrau­ bung gespannt befestigten Speichen.The invention relates to a spoke wheel for bicycles a hollow rim and attached to it by means of head nipples that protrude through the outer wall of the hollow chamber, by screwing Exercise tensioned spokes.

Durch die US 29 37 905 ist bereits ein Speichenrad mit einer Hohlkammerfelge bekannt. Die Innenwand dieser Hohlkammer bildet das Felgenbett, an dem an beiden Seiten nach außen gerichtet die sogenannten Felgenhörner zur Abstützung des Reifens mit dem Schlauch angeformt sind. Radial sind in gleichmäßigen Abständen durch die Außen­ wand der Hohlkammer in speziell nach außen gekröpften Bereichen entsprechend der Zahl der einzusetzenden Speichen langlochartige Bohrungen vorgesehen. Durch diese Bohrungen hindurch werden Kopfnippel eingesetzt, in denen die Speichen einschraubbar sind. Die Köpfe dieser Kopf­ nippel stützen sich innen an der Außenwand der Hohlkammer ab und ragen mit ihrem Schaft durch die Bohrungen nach außen. Die Verspannung der Speichen erfolgt von der Außenseite des Nippels her in bekannter Weise, wodurch die Speiche angezogen wird. Eine solche Montagetechnik erfordert die Ausbildung von relativ komplizierten Bohrungen bzw. Durchbrüchen in der Außenwand der Hohl­ kammerfelge mit entsprechender Ausprägung. Schwierig­ keiten bereitet auch das vollständige Verschließen der Bohrung nach Einsetzen der Kopfnippel.Through the US 29 37 905 a spoke wheel is already with a double wall rim known. The inner wall of this The rim well forms a hollow chamber on both sides the so-called rim flanges directed outwards Support the tire are molded with the tube. Radial are evenly spaced through the outside wall of the hollow chamber in specially cranked outwards Areas according to the number of used Spokes provided with oblong holes. Through this Head nipples are inserted through holes the spokes can be screwed in. The heads of this head nipples are supported on the inside of the outer wall of the hollow chamber and protrude with their shaft through the holes Outside. The spokes are braced by the  Outside of the nipple forth in a known manner, whereby the spoke is tightened. Such an assembly technique requires the training of relatively complicated Bores or breakthroughs in the outer wall of the hollow Chamber rim with a corresponding design. Difficult also prepares the complete sealing of the Hole after inserting the head nipple.

Die Aufgabe der Erfindung besteht darin, ein Speichenrad der eingangs genannten Art bezüglich der Montage der Speichen mit ihrem Kopfnippel zu vereinfachen und zu verbessern. The object of the invention is a spoke wheel of the type mentioned above with regard to the assembly of the Simplify and use spokes with their head nipples improve.  

Gelöst wird die Erfindungsaufgabe mit einem Speichenrad mit sämtlichen Merkmalen des Anspruches 1. Ein solches erfindungs­ gemäßes Speichenrad benötigt nicht mehr die Bohrungen in der Innenwand der Hohlkammer. Das Felgenbett bleibt daher glatt, so daß ein Felgenband nicht mehr erforderlich ist. Da das Felgenbett auf diese Weise geschlossen bleibt bis auf die abge­ dichtete Ventileinführung, eignet sich eine solche Felge auch bei entsprechender Ausbildung der Felgenhörner für die Aufnahme von schlauchlosen Reifen. Die Montage der Speichen ist verein­ facht. Die erfindungsgemäßen Kopfnippel werden durch die ent­ sprechenden Bohrungen in der Außenwand der Hohlkammer der Felge eingesprengt. Nach Aufschrauben auf die jeweilige Speiche kann sofort das Anziehen der Speiche zur Spannung erfolgen. Es entfällt daher wie bei den bekannten Speichenrädern zunächst das Aufdrehen der Kopfnippel von der Seite des Felgenbettes her.The invention task is solved with a spoke wheel all features of claim 1. Such a fiction appropriate spoke wheel no longer needs the holes in the Inner wall of the hollow chamber. The rim base therefore remains smooth, so that a rim tape is no longer required. Since that Rim bed closed in this way remains except for the abge sealed valve entry, such a rim is also suitable with appropriate training of the rim flanges for the recording tubeless tires. The assembly of the spokes is united fold. The head nipples according to the invention are ent speaking holes in the outer wall of the hollow chamber Rim blown in. After screwing onto the respective spoke the spoke can be tightened to tension immediately. It therefore, as with the known spoke wheels, is initially eliminated unscrewing the head nipples from the side of the rim well forth.

Gemäß Anspruch 2 wird vorgeschlagen, die Kopfabschnitte durch zwei zueinander senkrechte Schlitze in der Art eines Kreuz­ schlitzes zu bilden. Dabei entstehen vier Kopfabschnitte, die aufgrund des verwendeten Metalles federnd sind und sich zur Montage nach innen eindrücken lassen. Nach Durchführung des Kopfes durch die entsprechende Bohrung in der Außenwand der Hohlkammer federn diese Kopfabschnitte wieder nach außen und verrasten innen hinter dem Bohrungsrand an der Außenwand der Hohlkammer.According to claim 2 it is proposed that the head sections two perpendicular slits in the manner of a cross to form slit. This creates four head sections that are resilient due to the metal used and become Allow assembly to be pushed in. After performing the Head through the corresponding hole in the outer wall of the  These head sections spring outward and hollow again lock inside behind the edge of the hole on the outer wall of the Hollow chamber.

Erleichtert wird die Einführung des Kopfnippels durch Ein­ führungsschrägen am Ende des Kopfes bzw. der Kopfabschnitte.The insertion of the head nipple is facilitated by on bevels at the end of the head or head sections.

Durch die schräge Ausbildung der inneren Flanke des Kopfes wird bei entsprechender Ausbildung die Sicherheit der Verrastung des Kopfes hinter der Bohrung erreicht, ohne daß die Gefahr besteht, daß sich der Kopfnippel aus der Bohrung herauszieht.Due to the oblique formation of the inner flank of the head with appropriate training, the safety of the locking of the head behind the hole is reached without the danger there is that the head nipple pulls out of the hole.

Anhand eines abgebildeten Ausführungsbeispieles wird im folgen­ den die Erfindung näher erläutert. Es zeigen:Based on an illustrated embodiment will follow which the invention explains in more detail. Show it:

Fig. 1 in einer Schnittdarstellung einen Teilab­ schnitt einer Felge mit entsprechenden Kopfnippeln und Speichen, Fig. 1 in a sectional view a section of a rim with Teilab corresponding head nipples and spokes,

Fig. 2 die zugehörige seitliche Schnittansicht jeweils einer Prinzipdarstellung, Fig. 2 shows the corresponding sectional side view respectively of a schematic diagram,

Fig. 3 einen im Maßstab vergrößerten Querschnitt durch die Hohlkammerfelge mit einem einge­ setzten Kopfnippel und der darin befestigten Speiche, Fig. 3 is an enlarged scale cross section of the hollow-chambered rim with an inserted translated head nipple and the spoke mounted therein,

Fig. 4 die entsprechende Längsschnittdarstellung durch die Abbildung in Fig. 3 und Fig. 4 shows the corresponding longitudinal section through the illustration in Fig. 3 and

Fig. 5 die Draufsicht auf die Kopfseite des in Fig. 4 dargestellten Kopfnippels. Fig. 5 is a plan view of the head side of the head nipple shown in Fig. 4.

Die abgebildete Hohlkammerfelge 1 aus Leichtmetall eines Spei­ chenrades für Fahrräder weist in ihrem inneren Abschnitt eine umlaufende Hohlkammer 11 auf, deren Außenwand die Ziffer 12 und deren Innenwand die Ziffer 13 trägt. Die Außenseite dieser Innenwand 13 bildet das sogenannte Felgenbett. Seitlich schlie­ ßen an dieses Felgenbett 15 die Felgenhörner 14 zur Abstützung des Reifens an. Durch die Außenwand 12 sind entsprechend der einzusetzenden Zahl der Speichen Bohrungen 16 eingebracht.The hollow chamber rim 1 shown, made of light metal of a spoke wheel for bicycles, has in its inner portion a circumferential hollow chamber 11 , the outer wall of which bears the number 12 and the inner wall of which the number 13 bears. The outside of this inner wall 13 forms the so-called rim well. The rim flanges 14 adjoin the rim bed 15 laterally to support the tire. Bores 16 are made through the outer wall 12 in accordance with the number of spokes to be used.

Durch die Bohrungen 16 hindurch sind Kopfnippel 2 mit ihrem mehrfach geschlitzten Kopf 21 nach Zusammendrücken hindurchge­ führt und hinter den Bohrungen 16 an der Innenseite der Kammer­ außenwand 12 verrastet. Die Kopfabschnitte 21a sind gebildet durch zwei zueinander senkrechte Schlitze 22. Die Kopfabschnit­ te 21a besitzen außen Einführungsschrägen 212. Die Anlageseite des Kopfes 21 bilden die ebenfalls schrägen inneren Flanken 211.Through the holes 16 through the head nipple 2 with their multi-slotted head 21 leads after compression and is locked behind the holes 16 on the inside of the chamber outer wall 12 . The head sections 21 a are formed by two mutually perpendicular slots 22 . The Kopfabschnit te 21 a have outside bevels 212th The contact side of the head 21 is formed by the likewise oblique inner flanks 211 .

Die Kopfnippel 2 ragen mit ihrem Schaft 23 durch die Bohrungen 16 nach außen. In das Innengewinde dieser Kopfnippel 2 sind die Gewindeenden 31 der jeweiligen Speiche 3 angeschraubt. Über den Mehrkantabschnitt 24 des Kopfnippels 2 erfolgt die Einschraubung der Speiche 3 und ihre Spannung, da die Speiche 3 mit ihrem anderen nicht dargestellten Ende an der Nabe ge­ halten ist. Bei entsprechend tiefem Einschrauben der Speiche 3 bzw. ihres Gewindeabschnittes 31 wird zusätzlich verhindert, daß sich die Kopfabschnitte 21a nach innen eindrücken lassen.The head nipples 2 protrude with their shaft 23 through the bores 16 to the outside. The threaded ends 31 of the respective spoke 3 are screwed into the internal thread of this head nipple 2 . About the polygonal portion 24 of the head nipple 2 , the screwing of the spoke 3 and its tension takes place, since the spoke 3 with its other end, not shown, is held on the hub. If the spoke 3 or its threaded section 31 is screwed in correspondingly deeply, it is additionally prevented that the head sections 21 a can be pressed inward.

Zusammenstellung der BezugszeichenCompilation of the reference symbols

  1 Felge
 11 Hohlkammer
 12 Außenwand
 13 Innenwand
 14 Felgenhorn
 15 Felgenbett
 16 Bohrung
1 rim
11 hollow chamber
12 outer wall
13 inner wall
14 rim flange
15 rim base
16 hole

  2 Nippel
 21 Nippelkopf
 21a Kopfabschnitt
211 Kopfflanke
212 Einführungsschräge
 22 Schlitz
 23 Schaft
 24 Vierkantende
2 nipples
21 nipple head
21 a head section
211 head flank
212 chamfers
22 slot
23 shaft
24 square end

  3 Speiche
 31 Gewindeelement
3 spoke
31 threaded element

Claims (4)

1. Speichenrad für Fahrräder mit einer Hohlkammerfelge und daran mittels Kopfnippeln, die durch die Außenwand der Hohl­ kammer ragen, durch Einschraubung gespannt befestigten Spei­ chen, gekennzeichnet durch Kopfnippel (2) mit mehrfach achsparallel geschlitztem Kopf (21), der nach einem Zusammendrücken der elastischen Kopfabschnitte (21a) und Durchführung durch die Bohrung (16) in der Außenwand (12) der Hohlkammer (11) innen an der Außenwand (12) verrastend gehalten ist.1. Spoked wheel for bicycles with a hollow rim and attached to it by means of head nipples that protrude through the outer wall of the hollow chamber, tightened by screwing in, characterized by a head nipple ( 2 ) with a multiple axially parallel slotted head ( 21 ), which after compressing the elastic Head sections ( 21 a) and passage through the bore ( 16 ) in the outer wall ( 12 ) of the hollow chamber ( 11 ) is held on the inside on the outer wall ( 12 ). 2. Speichenrad nach Anspruch 1, dadurch gekennzeich­ net, daß die Kopfabschnitte (21a) durch zwei zueinander senkrechte Schlitze (22) gebildet sind.2. Spoked wheel according to claim 1, characterized in that the head portions ( 21 a) are formed by two mutually perpendicular slots ( 22 ). 3. Speichenrad nach Anspruch 1, dadurch gekennzeich­ net, daß am Ende des Kopfes (21) bzw. der Kopfabschnitte (21a) des Kopfnippels (2) Einführungsschrägen (212) ausge­ bildet sind.3. Spoked wheel according to claim 1, characterized in that at the end of the head ( 21 ) or the head portions ( 21 a) of the head nipple ( 2 ) introducing bevels ( 212 ) are formed. 4. Speichenrad nach Anspruch 1 dadurch gekennzeich­ net, daß die den Nippelschaft (23) überragende innere Flanke (211) des Kopfes (21) schräg ausgebildet ist.4. Spoked wheel according to claim 1, characterized in that the nipple shaft ( 23 ) projecting inner flank ( 211 ) of the head ( 21 ) is formed obliquely.
DE19914127500 1991-08-20 1991-08-20 Bicycle spoked wheel with cavity rim - has nipple with axis-parallel multi-slit head held locked in outer wall, on insertion through cavity outer wall Expired - Fee Related DE4127500C1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19914127500 DE4127500C1 (en) 1991-08-20 1991-08-20 Bicycle spoked wheel with cavity rim - has nipple with axis-parallel multi-slit head held locked in outer wall, on insertion through cavity outer wall

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19914127500 DE4127500C1 (en) 1991-08-20 1991-08-20 Bicycle spoked wheel with cavity rim - has nipple with axis-parallel multi-slit head held locked in outer wall, on insertion through cavity outer wall

Publications (1)

Publication Number Publication Date
DE4127500C1 true DE4127500C1 (en) 1992-10-01

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4212094A1 (en) * 1992-04-10 1993-10-14 Berg Union Handelsgesellschaft Wheel assembly with spokes - has spoke heads secured into hollow wheel rim by deformable grip sleeve between spoke hole and spoke
FR2727356A1 (en) * 1994-11-30 1996-05-31 Mavic Sa BICYCLE RIM AND WHEEL COMPRISING SUCH A RIM
WO2000068026A1 (en) * 1999-05-10 2000-11-16 Gubesch Gmbh Bicycle wheel
EP1418064A1 (en) * 2002-11-08 2004-05-12 Campagnolo Srl Method for manufacturing a spoked wheel for bicycles
EP1518717A1 (en) * 2003-09-27 2005-03-30 Jaanluen Industry Co., Ltd. Wheel having detachably securing spokes
FR2887493A1 (en) 2005-06-23 2006-12-29 Salomon Sa Spoke wheel e.g. back wheel, rim for bicycle, has external body having case formed by lower bridge having wall situated inside of case, where wall includes hollow groove having depth comprised between specific millimeters
US7448696B2 (en) 2002-11-21 2008-11-11 Campagnolo S.R.L. Rim and spoke connection for a bicycle wheel
US20130043713A1 (en) * 2011-08-19 2013-02-21 Raphael Schlanger Vehicle wheel spoke connection
US8668278B2 (en) 2007-11-26 2014-03-11 Campagnolo S.R.L. Rim for a bicycle wheel and bicycle wheel comprising such a rim
US8777328B2 (en) 2007-11-26 2014-07-15 Campagnolo S.R.L. Rim for a bicycle wheel and bicycle wheel comprising such a rim
US9079454B2 (en) 2008-03-14 2015-07-14 Campagnolo S.R.L. Rim made from composite material for a tubeless bicycle bicycle wheel and tubeless bicycle wheel comprising such a rim
US9688097B2 (en) 2003-08-11 2017-06-27 Campagnolo S.R.L. Method for producing composite bicycle rim

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2937905A (en) * 1955-11-29 1960-05-24 Altenburger Karl Spoke connection for tubeless tire rim

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2937905A (en) * 1955-11-29 1960-05-24 Altenburger Karl Spoke connection for tubeless tire rim

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4212094A1 (en) * 1992-04-10 1993-10-14 Berg Union Handelsgesellschaft Wheel assembly with spokes - has spoke heads secured into hollow wheel rim by deformable grip sleeve between spoke hole and spoke
FR2727356A1 (en) * 1994-11-30 1996-05-31 Mavic Sa BICYCLE RIM AND WHEEL COMPRISING SUCH A RIM
EP0714792A1 (en) * 1994-11-30 1996-06-05 Mavic S.A. Cycle rim and wheel provided with such a rim
WO2000068026A1 (en) * 1999-05-10 2000-11-16 Gubesch Gmbh Bicycle wheel
US8186766B2 (en) 2002-11-08 2012-05-29 Campagnolo, S.p.l. Bicycle spoked wheel and method for manufacturing the same
EP1418064A1 (en) * 2002-11-08 2004-05-12 Campagnolo Srl Method for manufacturing a spoked wheel for bicycles
US7178239B2 (en) 2002-11-08 2007-02-20 Campagnolo S.R.L. Method for use in manufacturing a bicycle spoked wheel
CN1533856B (en) * 2002-11-08 2010-05-12 坎培诺洛有限公司 Spoked wheel manufacturing method and spoked wheel product and tod parts used for said product
US7866045B2 (en) 2002-11-08 2011-01-11 Campagnolo S.R.L. Method for use in manufacturing a bicycle spoked wheel
US7448696B2 (en) 2002-11-21 2008-11-11 Campagnolo S.R.L. Rim and spoke connection for a bicycle wheel
US7748790B2 (en) 2002-11-21 2010-07-06 Campagnolo S.R.L. Rim and spoke connection on a spoked wheel for a bicycle
US9688097B2 (en) 2003-08-11 2017-06-27 Campagnolo S.R.L. Method for producing composite bicycle rim
EP1518717A1 (en) * 2003-09-27 2005-03-30 Jaanluen Industry Co., Ltd. Wheel having detachably securing spokes
FR2887493A1 (en) 2005-06-23 2006-12-29 Salomon Sa Spoke wheel e.g. back wheel, rim for bicycle, has external body having case formed by lower bridge having wall situated inside of case, where wall includes hollow groove having depth comprised between specific millimeters
US8668278B2 (en) 2007-11-26 2014-03-11 Campagnolo S.R.L. Rim for a bicycle wheel and bicycle wheel comprising such a rim
US8777328B2 (en) 2007-11-26 2014-07-15 Campagnolo S.R.L. Rim for a bicycle wheel and bicycle wheel comprising such a rim
US9757979B2 (en) 2007-11-26 2017-09-12 Campagnolo S.R.L. Rim for a bicycle wheel and bicycle wheel comprising such a rim
US9079454B2 (en) 2008-03-14 2015-07-14 Campagnolo S.R.L. Rim made from composite material for a tubeless bicycle bicycle wheel and tubeless bicycle wheel comprising such a rim
US20130043713A1 (en) * 2011-08-19 2013-02-21 Raphael Schlanger Vehicle wheel spoke connection
US20130043714A1 (en) * 2011-08-19 2013-02-21 Raphael Schlanger Vehicle wheel spoke connection

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