FR2704921A1 - Shape for a bicycle crank assembly chain wheel - Google Patents

Shape for a bicycle crank assembly chain wheel Download PDF

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Publication number
FR2704921A1
FR2704921A1 FR9305460A FR9305460A FR2704921A1 FR 2704921 A1 FR2704921 A1 FR 2704921A1 FR 9305460 A FR9305460 A FR 9305460A FR 9305460 A FR9305460 A FR 9305460A FR 2704921 A1 FR2704921 A1 FR 2704921A1
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FR
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Application
Patent type
Prior art keywords
shape
crank assembly
bicycle crank
gearing
speed
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.)
Granted
Application number
FR9305460A
Other languages
French (fr)
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FR2704921B1 (en )
Inventor
Rosset Bernard
Original Assignee
Rosset Bernard
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

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B62LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62MRIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M9/00Transmissions characterised by use of an endless chain, belt, or the like
    • B62M9/04Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio
    • B62M9/06Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio using a single chain, belt, or the like
    • B62M9/08Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio using a single chain, belt, or the like involving eccentrically- mounted or elliptically-shaped driving or driven wheel; with expansible driving or driven wheel
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B62LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62MRIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M9/00Transmissions characterised by use of an endless chain, belt, or the like
    • B62M2009/002Non-circular chain rings or sprockets
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H35/00Gearings or mechanisms with other special functional features
    • F16H2035/003Gearings comprising pulleys or toothed members of non-circular shape, e.g. elliptical gears

Abstract

Shape for a bicycle crank assembly chain wheel, transmission pulley or gearing with progressive and degressive radii creating a variable-speed circular motion to cause a constant-speed circular or motion linear. This invention relates to the ogive shape of a bicycle crank assembly, a pulley or gearing, driving a chain, a belt or gearing at constant speed, this shape turning about its axis A produces a motion with constantly progressing and degressing speed. Bicycle crank assembly chain wheels, pulleys and gearing driving piston engines. <IMAGE>

Description

La forme idéale d'un plateau de pédalier de vélo,Figure I, ou d'une poulie doit être composée de deux arcs de cercle identiques qui se coupent en formant deux angles suivant les The ideal shape of a bicycle chainwheel, Figure I, or a pulley to be composed of two identical circular arcs which intersect forming two angles at the
Figures 3,soit une OGIVE. Figures 3, a HUB.

Suivant la Figure 2,lorsque l'on fait tourner un cercle autour de son axe A,les rayons AB et AD sont égaux. According to Figure 2, when a circle is rotated around its axis A, AB and AD radii are equal.

Pour obtenir des rayons différents,il suffit de déplacer l'axe de rotation d'un demi cercle sur un point quelconque entre For different radii, it is sufficient to move the axis of rotation of a half circle at any point between
B et C ,soit le point F,pour obtenir des rayons différents matérialisés entre FB et FG. B and C, that is point F, for different radii materialized between FG and FB.

J'ai déjà mis en évidence par mon précédent brevet NO 90 I0393 du I6.08.90 concernant le mouvement irrégulier,qutil n'y a aucun à-coup lorsque la longueur du rayon après avoir atteint sa longueur maximum se rétrécie,c'est pourquoi il est tout à fait possible de mettre côte à côte deux arcs de cercle identiques formant deux angles en bout des rayons les plus longs. I have already highlighted my previous patent NO I0393 90 of I6.08.90 for irregular movement, qutil are no jolt when the radius length after reaching its maximum length is narrowed, so it is quite possible to put side by side two arcs forming two identical angle end of the longest rays.

Les Figures 3 représentent différentes ogives à titre d'exemples. Figures 3 show different warheads as examples.

J'ai réalisé un plateau de pédalier de vélo,Figure I avec un rayon qui augmente et diminue de 25% par rapport à un plateau rond,qui donne de très bons résultats en vitesse et confort d'utilisation. I realized a bicycle chain wheel, Figure I with a radius which increases and decreases of 25% on a round tray, which gives very good results in speed and comfort. Les manivelles d'entrainement sont placées perpendiculairement aux rayons les plus longs. The drive cranks are placed perpendicular to the longer rays.

Bien entendu,comme toutes les différences de longueur entre le rayon le plus court et le plus long sont possible, seuls les essais que les utilisateurs feront à l'avenir me permettront de définir les mesures offrant le plus d'intérêt. Of course, as any differences in length between the shortest and longest radius are possible, only the tests that users will in future allow me to define the measures with the most interest.

Toutes les Ogives présentent les mêmes caractéristiques. All Warheads have the same characteristics.

Suivant la Figure 4,est représentée une ogive composée de deux arcs BDC et BEC,tournante autour d'un axe A et entrainant autour de sa circonférence une chaine ou une courroie. According to Figure 4, there is shown a nose cone composed of two arcs BDC and BEC, rotating about an axis A and around its circumference causing a chain or a belt.

J'ai divisé en IO le mouvement sur un quart de tour pour l'étudier. I divided by IO movement on a quarter turn to the study.

Suivant la figure S,est représenté en linéaire la progression ou diminution de la longueur du rayon entraineur, ceci pour une vitesse régulière de l'ogive autour de l'axe A. According to Figure S, is shown in linear progression or reduction in the radius coach length, this for a regular speed of the cone around the axis A.

La progression ou diminution de la longueur des rayons produit une courbe. The increase or decrease of the beam length produces a curve.

Suivant la figure 6,j'ai considéré que la:chaine ou courroie entrainée par l'ogive a une vitesse constante,par conséquent l'ogive a une vitesse irrégulière progressive et dégressive. Next Figure 6, I considered that: chain or belt driven by the warhead at a constant speed, so the warhead has a progressive and regressive irregular speed. C'est ce qui m'intéresse pour utiliser au mieux une poussée irrégulière donnée à l'axe A entraineur.Je constate que si le mouvement est irrégulier,la longueur des rayons entraineurs progresse et dégresse de façon régulière. It's what interests me for the best use of an uneven thrust given to the axis A entraineur.Je notes that if the motion is irregular, the coaches ray length and dégresse progressing steadily.

Les figures 4',5' et 6' présentent les mêmes caractéristiques que les figures 4,5 et 6 avec des longueurs de rayons différents. Figures 4 ', 5' and 6 'have the same characteristics as in Figures 4,5 and 6 with different radii lengths.

Cette forme géométrique peut bien entendu être légèrement modifiée,l'arc de cercle devenir une courbe irrégulière sans pour autant sortir du cadre de protection de cette invention. This geometric shape can of course be changed slightly, the arc become an irregular curve without leaving the protective scope of this invention. Tous les plateaux de pédalier, toutes les poulies ainsi que tous les engrenages fabriqués suivant ce principe de mouvement entrent dans le cadre de protection de ce brevet. All chainwheels, all the pulleys and gears all manufactured according to this principle of movement are within the protection scope of this patent.

Claims (5)

  1. REVENDICATIONS
    I > Cette invention concerne la forme d'un plateau de transmission (3) tournant autour d'un axe (A),caractérisée en ce que sa circonférence est formée par deux arcs de cercle identiques qui se coupent en formant deux angles. I> This invention relates to the form of a transmission plate (3) rotating about an axis (A), characterized in that its circumference is formed by two identical circular arcs which intersect forming two angles.
  2. 2) Plateau selon la revendication I,caractérisé en ce que sa vitesse dé rotation est variable progressivement pour un entrainement à vitesse constante à sa circonférence0 2) A tray according to Claim I, characterized in that its rotation speed is variable progressively to a constant speed drive at its circonférence0
  3. 3) Plateau selon les revendications I et 2, caractérisé en ce qu'il entraine à sa circonférence une chaine. 3) A tray according to claims I and 2, characterized in that it leads to its circumference a chain.
  4. 4) Plateau selon les revendications précédentes, caractérisé en ce qu'ilentraine à sa circonférence une courroie 4) A tray according to the preceding claims, characterized in qu'ilentraine at its circumference a belt
  5. 5) Plateau selon les revendications précédentes, caractérisé en ce qu?il entraine à sa circonférence un engrenage. 5) A tray according to the preceding claims, characterized in that eye leads to its circumference a gear.
FR9305460A 1993-05-06 1993-05-06 Form bike chainring. Expired - Fee Related FR2704921B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR9305460A FR2704921B1 (en) 1993-05-06 1993-05-06 Form bike chainring.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9305460A FR2704921B1 (en) 1993-05-06 1993-05-06 Form bike chainring.

Publications (2)

Publication Number Publication Date
FR2704921A1 true true FR2704921A1 (en) 1994-11-10
FR2704921B1 FR2704921B1 (en) 1998-06-12

Family

ID=9446859

Family Applications (1)

Application Number Title Priority Date Filing Date
FR9305460A Expired - Fee Related FR2704921B1 (en) 1993-05-06 1993-05-06 Form bike chainring.

Country Status (1)

Country Link
FR (1) FR2704921B1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001064505A1 (en) * 2000-03-03 2001-09-07 Sanchez Daniel Gongora Bicycle transmission
FR2959982A1 (en) * 2010-05-11 2011-11-18 Bernard Rosset Bicycle chain driving plate, has two circular arcs rotating around axis of common cords to regularly vary speed of rotation of crank on which common cords are fixed by driving chains at constant speed

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR350848A (en) * 1905-01-18 1905-06-27 Fernand Francois Camille Lemai force producer bicycle by multiplying eccentric gears ovalized
FR911327A (en) * 1942-06-05 1946-07-04 Improvements to the operation of bicycles, tandems, tricycles, scooters, and other pedal vehicles
FR925398A (en) * 1946-03-26 1947-09-02 control plate for vehicles propelled by pedals or cranks and variable development
FR2264709A1 (en) * 1974-03-22 1975-10-17 Bonneau Gabriel Oval crank wheel for bicycle - has elliptical or similar shape for minimum loss of energy
US4342559A (en) * 1978-01-18 1982-08-03 National Technology Corporation Drive system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR350848A (en) * 1905-01-18 1905-06-27 Fernand Francois Camille Lemai force producer bicycle by multiplying eccentric gears ovalized
FR911327A (en) * 1942-06-05 1946-07-04 Improvements to the operation of bicycles, tandems, tricycles, scooters, and other pedal vehicles
FR925398A (en) * 1946-03-26 1947-09-02 control plate for vehicles propelled by pedals or cranks and variable development
FR2264709A1 (en) * 1974-03-22 1975-10-17 Bonneau Gabriel Oval crank wheel for bicycle - has elliptical or similar shape for minimum loss of energy
US4342559A (en) * 1978-01-18 1982-08-03 National Technology Corporation Drive system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001064505A1 (en) * 2000-03-03 2001-09-07 Sanchez Daniel Gongora Bicycle transmission
ES2189583A1 (en) * 2000-03-03 2003-07-01 Sanchez Daniel Congora Transmission for bicycles.
FR2959982A1 (en) * 2010-05-11 2011-11-18 Bernard Rosset Bicycle chain driving plate, has two circular arcs rotating around axis of common cords to regularly vary speed of rotation of crank on which common cords are fixed by driving chains at constant speed
FR2959983A1 (en) * 2010-05-11 2011-11-18 Bernard Rosset Tray for a bicycle bottom bracket

Also Published As

Publication number Publication date Type
FR2704921B1 (en) 1998-06-12 grant

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ST Notification of lapse
RN Application for restoration
IC Decision of the director general to declare irreceivable or to reject an appeal