FR2566361A1 - Improvements to cranks of cycle pedal boxes. - Google Patents
Improvements to cranks of cycle pedal boxes. Download PDFInfo
- Publication number
- FR2566361A1 FR2566361A1 FR8410025A FR8410025A FR2566361A1 FR 2566361 A1 FR2566361 A1 FR 2566361A1 FR 8410025 A FR8410025 A FR 8410025A FR 8410025 A FR8410025 A FR 8410025A FR 2566361 A1 FR2566361 A1 FR 2566361A1
- Authority
- FR
- France
- Prior art keywords
- cranks
- crank
- pedal
- bar
- axis
- 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.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
- B62M3/00—Construction of cranks operated by hand or foot
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Transmission Devices (AREA)
Abstract
Description
La présente invention concerne les manivelles de pedaliers de cycles. The present invention relates to cranks for cycle cranksets.
Les pedaliers de cycles comprennent généralement un plateau constitué par une couronne crantée pour coopérer avec une chaîne a rouleaux entraînant le pignon calé sur la roue arrière. Cycle pedals generally include a plate constituted by a notched crown to cooperate with a roller chain driving the pinion wedged on the rear wheel.
Sur l'axe sur lequel est calé le plateau sont clavetées deux manivelles décalées angulairement de 1800 et à l'extrémité libre desquelles tournent librement des pedales. On the axis on which the plate is wedged are keyed two cranks offset angularly by 1800 and at the free end of which the pedals freely rotate.
On sait que lorsque l'utilisateur applique-sur la pëdale une force égale a son poids que la composante utile de cette force d une amplitude sinusoïdale. Cette force étant nulle lorsque la pédale est au plus haut n maximum lorsque la pédale arrive a la hauteur de l'axe du pédalier, eût nulle lorsque la pédale arrive au plus bas de sa course Il serait doic souhaitable de pouvoir augmenter la longueur de la manivelle, mais ceci n' est pas possible du fait que dans les virages les pédales risquent de toucher le sol et de plus, on dOnt tenir compte de la longueur des jambes de l'utilisateur. We know that when the user applies to the pedal a force equal to its weight as the useful component of this force of a sinusoidal amplitude. This force being zero when the pedal is at the highest n maximum when the pedal arrives at the height of the crankset axis, would be zero when the pedal arrives at the bottom of its stroke It would be desirable to be able to increase the length of the crank, but this is not possible due to the fact that when cornering the pedals may touch the ground and moreover, the length of the user's legs must be taken into account.
L'un des buts de la présente invention est9 durant la course où la force est maximum de permettre d'éloi- gner9 le plus possible le point d'application de celle-ci par rapport l'axe du pédalier. One of the aims of the present invention is during the race where the force is maximum to allow the point of application of the latter to be moved as far as possible relative to the axis of the crankset.
Les perfectionnements9 selon l'invention9 s'appliquent a des manivelles de pédaliers et sont caractérises en ce que lesdites manivelles comportent leur extrémité libre un prolongement termine par un coude a partir duquel s'étend une barrette située dans le plan de la manivelle formant avec la surface supérieure de celle-ci dans une position correspondisant à sa course active un angle aigu9 ladite barrette comportant a son extrémité libre des moyens de fixation de l'axe d'une pédale. Grâce a cette disposition9 on réalise un allongement de la manivelle sans pour autant éloigner l'axe de la pédale de l'axe du pédalier. The improvements9 according to the invention9 apply to cranks of cranksets and are characterized in that said cranks have their free end an extension ending in a bend from which extends a bar located in the plane of the crank forming with the upper surface thereof in a position corresponding to its stroke activates an acute angle9 said bar comprising at its free end means for fixing the axis of a pedal. Thanks to this arrangement9 an elongation of the crank is achieved without moving the axis of the pedal away from the axis of the crankset.
De préférence, le prolongement et la barrette ont une longueur identique. Preferably, the extension and the bar have an identical length.
Enfin, l'angle formé entre la barrette et la mani- velle est de l'ordre de 45". Finally, the angle formed between the bar and the crank is of the order of 45 ".
L'invention va maintenant être décrite avec plus de détails en se référant à un ode de réalisation particulier donné à titre d'exemple seulement et représenté à la figure unique qui est une vue en élévation d'un pédalier muni des manivelles selon l'invention. The invention will now be described in more detail with reference to a particular embodiment given by way of example only and shown in the single figure which is an elevation view of a crankset fitted with cranks according to the invention .
A la figure, on a représenté un pédalier désigné dans son ensemble par la référence 1 et comportant un plateau 2 calé sur un axe 3 supporté par le cadre (non représente ici) et comportant a sa périphérie des crans 4 destinés à coopérer avec les rouleaux d'une chaîne entraînant un pignon calé sur la roue arrière d'un cycle. Sur l'axe 3 sont clavetées deux manivelles 5 et 5a, la manivelle 5a étant décalée angulairement de 1800 par rapport à la manivelle 5 et située, comme cela se fait habituellement du côté du cadre opposé à celui du côté duquel est situé le plateau 2. In the figure, there is shown a crankset designated as a whole by the reference 1 and comprising a plate 2 wedged on an axis 3 supported by the frame (not shown here) and comprising at its periphery notches 4 intended to cooperate with the rollers of a chain driving a pinion wedged on the rear wheel of a cycle. On the axis 3 are keyed two cranks 5 and 5a, the crank 5a being angularly offset by 1800 relative to the crank 5 and located, as is usually done on the side of the frame opposite to that on the side of which the plate 2 is located .
Les manivelles 5 et 5a sont identiques et ont une longueur supérieure à celle des manivelles usuelles, par exemple, une manivelle de t7 cm est allongée de 3 cm. The cranks 5 and 5a are identical and have a length greater than that of the usual cranks, for example, a crank of t7 cm is elongated by 3 cm.
A l'extrémité libre de chaque manivelle 5, Sa est formé un coude G à partir duquel s'étend une barrette 7 comportant au voisinage de son extrémité libre un trou taraudé pour recevoir l'axe fileté d'une pédale 8. At the free end of each crank 5, Sa is formed a bend G from which extends a bar 7 comprising, in the vicinity of its free end, a tapped hole for receiving the threaded axis of a pedal 8.
Chaque barrette 7 forme avec la manivelle un angle de l'ordre de 45G et à une longueur qui correspond sensiblement a l'extension de la longueur de la manivelle de sorte que l'axe des pédales 8 est situé à une distance de l'axe 3 qui correspond à la distance séparant l'axe de la pédale de l'axe du pédalier d'une manivelle normale. Each bar 7 forms an angle with the crank of the order of 45G and a length which corresponds substantially to the extension of the length of the crank so that the axis of the pedals 8 is located at a distance from the axis 3 which corresponds to the distance separating the axis of the pedal from the axis of the crankset of a normal crank.
On conçoit qu'une telle manivelle permet d'aug- menter la force appliquee aux manivelles durant la course ou elle est maximum sans gêner l'utilisateur. It is understood that such a crank makes it possible to increase the force applied to the cranks during the race or it is maximum without disturbing the user.
Bien entendu, l'invention n'est pas limitée au mode de réalisation qui vient d'être décrit et représenté. Of course, the invention is not limited to the embodiment which has just been described and shown.
On pourra y apporter de nombreuses modifications de détail sans sortir pour cela du cadre de l'invention. Many modifications of detail can be made without departing from the scope of the invention.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8410025A FR2566361A1 (en) | 1984-06-26 | 1984-06-26 | Improvements to cranks of cycle pedal boxes. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8410025A FR2566361A1 (en) | 1984-06-26 | 1984-06-26 | Improvements to cranks of cycle pedal boxes. |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2566361A1 true FR2566361A1 (en) | 1985-12-27 |
Family
ID=9305428
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR8410025A Withdrawn FR2566361A1 (en) | 1984-06-26 | 1984-06-26 | Improvements to cranks of cycle pedal boxes. |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2566361A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5125288A (en) * | 1991-01-22 | 1992-06-30 | Amiet Alick G | Arcuate bicyle crank lever apparatus |
WO1997002174A1 (en) * | 1995-07-06 | 1997-01-23 | Sang Yeon Jo | Crank-rods of a bicycle |
US5899119A (en) * | 1995-07-11 | 1999-05-04 | Coment; Glenn H. | Bicycle crank assembly |
-
1984
- 1984-06-26 FR FR8410025A patent/FR2566361A1/en not_active Withdrawn
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5125288A (en) * | 1991-01-22 | 1992-06-30 | Amiet Alick G | Arcuate bicyle crank lever apparatus |
WO1997002174A1 (en) * | 1995-07-06 | 1997-01-23 | Sang Yeon Jo | Crank-rods of a bicycle |
CN1069870C (en) * | 1995-07-06 | 2001-08-22 | 赵相缘 | Crank-rods of bicycle |
US5899119A (en) * | 1995-07-11 | 1999-05-04 | Coment; Glenn H. | Bicycle crank assembly |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |