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FR2693973A1 - Extending pedal crank for bicycle - has sliding cranks in guides on crank axis with pedals bearing on rollers on circular crown with centre shifted from crank axis - Google Patents

Extending pedal crank for bicycle - has sliding cranks in guides on crank axis with pedals bearing on rollers on circular crown with centre shifted from crank axis Download PDF

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Publication number
FR2693973A1
FR2693973A1 FR9209499A FR9209499A FR2693973A1 FR 2693973 A1 FR2693973 A1 FR 2693973A1 FR 9209499 A FR9209499 A FR 9209499A FR 9209499 A FR9209499 A FR 9209499A FR 2693973 A1 FR2693973 A1 FR 2693973A1
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FR
France
Prior art keywords
crank
axis
crankset
cranks
length
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
FR9209499A
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French (fr)
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FR2693973B1 (en
Inventor
Lemoine Constant
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Individual
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Individual
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Publication date
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Priority to FR9209499A priority Critical patent/FR2693973B1/en
Publication of FR2693973A1 publication Critical patent/FR2693973A1/en
Application granted granted Critical
Publication of FR2693973B1 publication Critical patent/FR2693973B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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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
    • B62M3/02—Construction of cranks operated by hand or foot of adjustable length
    • B62M3/04—Construction of cranks operated by hand or foot of adjustable length automatically adjusting

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Motorcycle And Bicycle Frame (AREA)

Abstract

The cycle pedal gear enables the pedal cranks to extend, augmenting cycling effort. The cranks (5) slide in guide sleeves (4), fixed to the pedal crank rotational axis. The cranks may thus vary in length, applying differing leverage to the crank axis. A circular crown rail (7) may be positioned with its centre 7 cm in front of the crank axis. The crown rail may be 34 cm diameter, fixed to the cycle frame by two collars (1). Rollers (8) at pedal level (6) may roll on the rail, adjusting crank length, as pedals rotate. ADVANTAGE - Maximises cyclists effort, suiting the pedal crank length to the cyclists stature, for competition, pleasure or all terrain.

Description

= DESCRIPTION =
Une réflexion sur les moyens éventuels pour maximiser le rendement de effort transmis par un cycliste à la progression de sa bicyclette auelquten soit l'utilisation (compétition, promenade, tout terrain..,) m'a conduit à penser que l'allon- gement des manivelles du pédalier pouvait apporter une réponse. Cette approche implique de prendre en compte les contraintes morphologiques de l'utilisateur et de ce fait, rspecter un diamètre maximum de 35 cm pour le cercle de rotation des pédales.= DESCRIPTION =
A reflection on the possible means to maximize the output of effort transmitted by a cyclist to the progression of his bicycle auelquten is the use (competition, walk, all terrain ..,) led me to think that the extension cranks of the bottom bracket could provide an answer. This approach implies taking into account the morphological constraints of the user and therefore respecting a maximum diameter of 35 cm for the circle of rotation of the pedals.

Pour répondre å cette difficulté, il fallait remarquer que seule la moitié avant du cercle de rotation des pédales assurait la transmission de l'effort du cycliste au cycle luimême. To answer this difficulty, it should be noted that only the front half of the circle of rotation of the pedals ensured the transmission of the effort from the cyclist to the cycle itself.

Il.a3rarut alors très indiqué d'allonger les manivelles dans ce secteur, tout en respectant la limite maximum des 35cm pour le cercle de rotation, et c'est alors que la conception de manivelles coulissantes parut être la solution pour assurer l'effet recherché. Il.a3rarut then very indicated to lengthen the cranks in this sector, while respecting the maximum limit of 35cm for the rotation circle, and it is then that the design of sliding cranks seemed to be the solution to ensure the desired effect .

Cette théorie de conception fut concrétisée par la réalides éléments du complexe décrit ci-desso.us et installe'. de part et d'autre du cadre de la bicyclette. Ge complexe est réalisé en métal(acier, aluminium, alliage..,) et peut l'étire en P V C
Prèsentation du complexe.This design theory was concretized by the real elements of the complex described above and installed. on either side of the bicycle frame. Ge complex is made of metal (steel, aluminum, alloy ..,) and can stretch it in PVC
Presentation of the complex.

1) - Une cage-guide manivelle fixée à l'axe du pédalier
(4 fig 2 et 4 et fig 5, 6, 7, 8)
2) - Une manivelle coulissant (5 fig 2 et 4 et fig 9, 10, 11,
12), dans la cage-guide ci-dessus et présentant une ion-
gueur..d'application variable et maximale pour 24 cm..1) - A crank guide cage fixed to the crankset axle
(4 fig 2 and 4 and fig 5, 6, 7, 8)
2) - A sliding crank (5 fig 2 and 4 and fig 9, 10, 11,
12), in the guide cage above and having an ion-
gueur..variable and maximum application for 24 cm ..

3) - Un système guide de rotation circulaire autour d'un axe
dont la position fictive ou réelle est décalée en avant
notamment de 7 cm de l'axe du pédalier.3) - A circular rotation guide system around an axis
whose fictitious or real position is shifted forward
especially 7 cm from the bottom bracket.

Ce système se.présente sous l'une ou l'autre des for-
mes suivantes:
a)- (fig 1 et 2) l'ensemble rail-poulies se décomposant
comme suit:
- Un rail ayant la forme d'une couronne circulaire
(7 fig 2, et fig 13) dont le centre est posi
tionné en avant, notamment de 7 cm, de l'axe
du pédalier. Le diamètre de cette couronne est
limité à 34 cm afin de respecter les contrain
tes morphologiques de l'utIlisateur. Cette cou
ronne sert de guide de rotation au mouvement de
la pédale et, est fixée au cadre par 2 colliers
(1 fig 1).This system is presented in one or other of the forms
my following:
a) - (fig 1 and 2) the rail-pulley assembly decomposing
as following:
- A rail in the shape of a circular crown
(7 fig 2, and fig 13) whose center is posi
tionnée in front, in particular of 7 cm, of the axis
of the crankset. The diameter of this crown is
limited to 34 cm in order to respect the constraints
your user morphology. This neck
ronne serves as a rotation guide for the movement of
the pedal and is fixed to the frame by 2 clamps
(1 fig 1).

- Un porte-poulies (8 fig 2, et fig 14, 15, 16, 17)
relié à la manivelle (5 fig 2, et fig 9, 10, 11,
12) au niveau de la pédale (6 fig 2) roule sur
le précédent rail (7:fg 2) et module ainsi la
longueur d'application de la manivelle.- A pulley holder (8 fig 2, and fig 14, 15, 16, 17)
connected to the crank (5 fig 2, and fig 9, 10, 11,
12) on the pedal (6 fig 2) rolls on
the previous rail (7: fg 2) and thus modulates the
length of application of the crank.

b)- ( fig 3 et 4 ) Le combihé de 2 manivelles décrites ci-dessousX
- L'une, (5 fig 4), à longueur d'application va-
riable par coulissement (fig 9 10, 11, 12). b) - (fig 3 and 4) The combination of 2 cranks described belowX
- One, (5 fig 4), with application length will
sliding by sliding (fig 9 10, 11, 12).

- L'autre(9 fig 4) à longueur constant (fig 18)
voisine de 17 cm, dont l'axe de rotation posi
tionné en avant, notamment de 7 cm, de celui du
pédalier est fixé sur un cavalier (2 fig 4)
solidaire du cadre de la bicyclette.- The other (9 fig 4) at constant length (fig 18)
about 17 cm, whose axis of rotation posi
tioned in front, in particular of 7 cm, that of the
crankset is fixed on a rider (2 fig 4)
secured to the frame of the bicycle.

Ces 2 manivelles sont reliées par une pédale
( fig 19 ).These 2 cranks are connected by a pedal
(fig 19).

Les différentes composantes du complue presenté cidessus sont réalisées en double et placées de part et d'autre du cadre de la bicyclette.  The different components of the above package are made in duplicate and placed on either side of the bicycle frame.

Claims (5)

= REVENDICATIONS == CLAIMS = 1) Pédalier de cycle dont l'extensibilité de la longueur  1) Cycle crankset with length extensibility des manivelles dans la zône d'effort appliqué aux pédales par le cranks in the force zone applied to the pedals by the cycliste permet, par l'allongement du bras de levier, d'augmenter cyclist allows, by extending the lever arm, to increase sensiblement le rendement de cet effort. L'ensemble du système, significantly the return on this effort. The whole system, trouvant son application de part et d'autre du cadre du cycle, finding its application on both sides of the cycle framework, est caractérisé par une cage-guide manivelle (fig 5, 6, 7, 8) is characterized by a crank guide cage (fig 5, 6, 7, 8) fixée à l'axe de rotation du pédalier et supportant une manivelle fixed to the rotation axis of the crankset and supporting a crank coulissante (fig 9 10, 11, 12). sliding (fig 9 10, 11, 12). 2) Pédalier selon la revendication 1 caractérisé par ce 2) crankset according to claim 1 characterized by que la manivelle (9, 10, 11 12) coulissant dans la cage-guide that the crank (9, 10, 11 12) sliding in the guide cage fig 5, 6, 7, 8) a une longueur d'application variable sur l'axe fig 5, 6, 7, 8) has a variable application length on the axis du pédalier. of the crankset. 3) Pédalier selon les revendications 1 et 2 caractérisé par 3) crankset according to claims 1 and 2 characterized by une combinaisonayantla forme d'un rail-poulies dont chacun des a combination having the form of a pulley rail, each of which éléments est caractérisé comme suit: elements is characterized as follows: - Un rail ayant la forme d'une couronne circulaire (fig 13) - A rail in the shape of a circular crown (fig 13) dont le centre est positionné 7 cm en avant de l'axe du whose center is positioned 7 cm in front of the axis of the pédalier. Cette couronne mesure 34 cm de diamètre et res crankset. This crown measures 34 cm in diameter and res secte ainsi les contraintes morphologiques de l'utilisateur thus sects the user's morphological constraints Elle sert de guide de rotation au mouvement de la pédale. It serves as a rotation guide for the movement of the pedal. Elle est fixée au cadre par 2 colliers (1 fig 1). It is fixed to the frame by 2 collars (1 fig 1). ainsi la longueur d'application de la manivelle. thus the length of application of the crank. (fig 9, 10, 11, 12) roule sur le précédent rail et module (fig 9, 10, 11, 12) rolls on the previous rail and module - Un porte-poulies (fig 14 15, 16, 17) fixé à la manivelle - A pulley holder (fig 14 15, 16, 17) fixed to the crank 4) Pédalier selon les revendications 1 et 2 caractérisé par 4) crankset according to claims 1 and 2 characterized by une combinaison constituée de 2 manivelles: a combination made up of 2 cranks: - L'une à longueur d'application variable (fig 9, 10, 11, 12) - One with variable application length (fig 9, 10, 11, 12) - L'autre à longueur constante (fig 18) voisine de 17 cm et - The other at constant length (fig 18) close to 17 cm and dont l'axe de rotation, positionné en avant, notamment of which the axis of rotation, positioned in front, in particular de 7cm, de l'axe du pédalier est fixé sur un cavalier  7cm, the bottom bracket axis is fixed on a rider (2 fig 3) solidaire de l'axe de la bicyclette. (2 fig 3) integral with the axis of the bicycle. Ces S manivelles sont reliées par 1 pédale (fig 19). These S cranks are connected by 1 pedal (fig 19). 5) Pédalier selon l'une de revendications 1, 3, ou 4; caractérisé par ee que tous ses composants sont réalisés en métal (acier, aluminium, alliage..,) mais peuvent l'être en PV  5) Crankset according to one of claims 1, 3, or 4; characterized by the fact that all of its components are made of metal (steel, aluminum, alloy, etc.) but can be made of PV
FR9209499A 1992-07-24 1992-07-24 Cycle crankset with extendable cranks allowing the offset from the center of the pedal rotation circle in front of the axis of the chain drive chain (s). Expired - Fee Related FR2693973B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR9209499A FR2693973B1 (en) 1992-07-24 1992-07-24 Cycle crankset with extendable cranks allowing the offset from the center of the pedal rotation circle in front of the axis of the chain drive chain (s).

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9209499A FR2693973B1 (en) 1992-07-24 1992-07-24 Cycle crankset with extendable cranks allowing the offset from the center of the pedal rotation circle in front of the axis of the chain drive chain (s).

Publications (2)

Publication Number Publication Date
FR2693973A1 true FR2693973A1 (en) 1994-01-28
FR2693973B1 FR2693973B1 (en) 1994-12-23

Family

ID=9432490

Family Applications (1)

Application Number Title Priority Date Filing Date
FR9209499A Expired - Fee Related FR2693973B1 (en) 1992-07-24 1992-07-24 Cycle crankset with extendable cranks allowing the offset from the center of the pedal rotation circle in front of the axis of the chain drive chain (s).

Country Status (1)

Country Link
FR (1) FR2693973B1 (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997029009A1 (en) * 1996-02-08 1997-08-14 BRIERE, Véronique Power boosting crank gear for bicycles
WO1999041139A1 (en) * 1998-02-13 1999-08-19 Vega Millan Jose Traction mechanism for bicycles intended to increase the power at the axis
GB2336140A (en) * 1998-04-08 1999-10-13 John Brian Dixon Pedelty Variable length bicycle crank
DE102004023091A1 (en) * 2004-05-05 2005-12-01 Kurt Oehlschlaeger Foot pedal drive for e.g. bicycle, has guiding bar with two levers which are pivoted with their one end such that torque is produced downward via bar in interaction with forward affecting force, during progressive rotation of pedals
BE1018752A4 (en) * 2009-05-12 2011-08-02 Beyens Florentius CRANKSTEL FOR BIKE.
EP3135575A1 (en) * 2015-08-03 2017-03-01 Gianni Zanieri Device for bicycles
ITUB20155394A1 (en) * 2015-11-09 2017-05-09 Cingolani Maria Teresa MOTION TRANSMISSION MEANS FOR MOTORCYCLE TRANSMISSION IN A BICYCLE.
FR3078679A1 (en) * 2018-03-07 2019-09-13 Gilbert Lechevalier SLIDING BICYCLE CRANKSHAFT

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE417318C (en) * 1925-08-10 Alois Kehrle Pedal crank for bicycles
FR602334A (en) * 1925-08-21 1926-03-17 Slide pedal or crank
FR908071A (en) * 1944-12-05 1946-03-29 Eccentric device for bicycle crankset
FR2365474A1 (en) * 1976-09-24 1978-04-21 Cherier Marcelin Extensible pedal crank assembly - has crank rods slidable into tubes on sprocket hub under control of guide roller engaging fixed circular track
BE894080A (en) * 1982-08-11 1982-12-01 Vos Frans R De Crank mechanism for e.g. bicycle drive - has rotating pedal arms radially slidably guided relative to crankshaft by eccentric guide rings
FR2582612A1 (en) * 1985-06-04 1986-12-05 Roulette Guy Improved pedal box especially for bicycles

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE417318C (en) * 1925-08-10 Alois Kehrle Pedal crank for bicycles
FR602334A (en) * 1925-08-21 1926-03-17 Slide pedal or crank
FR908071A (en) * 1944-12-05 1946-03-29 Eccentric device for bicycle crankset
FR2365474A1 (en) * 1976-09-24 1978-04-21 Cherier Marcelin Extensible pedal crank assembly - has crank rods slidable into tubes on sprocket hub under control of guide roller engaging fixed circular track
BE894080A (en) * 1982-08-11 1982-12-01 Vos Frans R De Crank mechanism for e.g. bicycle drive - has rotating pedal arms radially slidably guided relative to crankshaft by eccentric guide rings
FR2582612A1 (en) * 1985-06-04 1986-12-05 Roulette Guy Improved pedal box especially for bicycles

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997029009A1 (en) * 1996-02-08 1997-08-14 BRIERE, Véronique Power boosting crank gear for bicycles
FR2744691A1 (en) * 1996-02-08 1997-08-14 Briere Jean BICYCLE OVERHEAD CRANKSET
WO1999041139A1 (en) * 1998-02-13 1999-08-19 Vega Millan Jose Traction mechanism for bicycles intended to increase the power at the axis
GB2336140A (en) * 1998-04-08 1999-10-13 John Brian Dixon Pedelty Variable length bicycle crank
GB2336140B (en) * 1998-04-08 2002-08-28 John Brian Dixon Pedelty Automatic variable length crank assembly
DE102004023091A1 (en) * 2004-05-05 2005-12-01 Kurt Oehlschlaeger Foot pedal drive for e.g. bicycle, has guiding bar with two levers which are pivoted with their one end such that torque is produced downward via bar in interaction with forward affecting force, during progressive rotation of pedals
DE102004023091B4 (en) * 2004-05-05 2008-01-10 Kurt Oehlschlaeger Pedal crank drive for powered by muscle power devices, especially vehicles and exercise equipment
DE102004023091B8 (en) * 2004-05-05 2008-04-30 Kurt Oehlschlaeger Pedal crank drive for powered by muscle power devices, especially vehicles and exercise equipment
BE1018752A4 (en) * 2009-05-12 2011-08-02 Beyens Florentius CRANKSTEL FOR BIKE.
EP3135575A1 (en) * 2015-08-03 2017-03-01 Gianni Zanieri Device for bicycles
ITUB20155394A1 (en) * 2015-11-09 2017-05-09 Cingolani Maria Teresa MOTION TRANSMISSION MEANS FOR MOTORCYCLE TRANSMISSION IN A BICYCLE.
FR3078679A1 (en) * 2018-03-07 2019-09-13 Gilbert Lechevalier SLIDING BICYCLE CRANKSHAFT

Also Published As

Publication number Publication date
FR2693973B1 (en) 1994-12-23

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Effective date: 20080331