DE3425342A1 - Articulated tread crank for bicycle - Google Patents

Articulated tread crank for bicycle

Info

Publication number
DE3425342A1
DE3425342A1 DE19843425342 DE3425342A DE3425342A1 DE 3425342 A1 DE3425342 A1 DE 3425342A1 DE 19843425342 DE19843425342 DE 19843425342 DE 3425342 A DE3425342 A DE 3425342A DE 3425342 A1 DE3425342 A1 DE 3425342A1
Authority
DE
Germany
Prior art keywords
crank
pedal
movement
case
spring
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Withdrawn
Application number
DE19843425342
Other languages
German (de)
Inventor
Günther 7505 Ettlingen Zschernitz
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.)
Individual
Original Assignee
Individual
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
Priority claimed from DE19843411008 external-priority patent/DE3411008A1/en
Priority claimed from DE19843416309 external-priority patent/DE3416309A1/en
Application filed by Individual filed Critical Individual
Priority to DE19843425342 priority Critical patent/DE3425342A1/en
Publication of DE3425342A1 publication Critical patent/DE3425342A1/en
Withdrawn legal-status Critical Current

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
    • B62M1/00—Rider propulsion of wheeled vehicles
    • B62M1/36—Rider propulsion of wheeled vehicles with rotary cranks, e.g. with pedal cranks
    • 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
    • B62M2003/006—Crank arrangements to overcome dead points

Abstract

Whether a modern bicycle is equipped with or without gears, in any case the present invention permits the same effect to be achieved with less energy. Since the forces which act on the pedal can vary, the spring forces must of course be variable. Tension springs or also compression springs can be used. If the pedal approaches the lower dead-centre point, the spring whose tension is being released will return the previously stored energy to the crank, in which case the lower dead-centre point will also be overcome better than with the previous drive. The length by which the crank is to vary is as variable as the spring force or the respective length of the two crank parts. There are enough possibilities to achieve the best effect for any desired variant. The pedal does not make a circular movement, as was the case previously, but rather a forward oval movement when depressed whilst the upward movement is again a circular one. The transition from the round upward movement to the oval downward movement of the pedal also takes place in a transition-free fashion in the opposite direction.

Description

Gelenk - Tretkurbel für Fahrrad.Articulated crank for bicycle.

Vorliegende Wrfindung soll das Radfahren mit weniger Energie-Aufwand, als dies beim bisherigen Antrieb der Fall ist, ermöglichen.The present invention is intended to make cycling with less energy expenditure, than is the case with the previous drive.

Die Tretkurbel des Fahrrades wird zu diesem Zwecke mit einem Gelenk versehen, welches dem Kurbelarm eine abgewinkelte Form gibt. Eine Feder hält die Kurbel in*d,ieser Winkelform, solange keine Energie huber das Pedal auf die Kurbel einwirkt. Beim Heruntertreten des Pedals, streckt sich die gewinkelte Kurbel wie,auch die Feder und wird dabei länger. Der Kurbelarm erreicht seine größte Länge bei höchster Belastung also dann, wenn die Kurbel sich ca. um 90 Grad nach unten bewegt hat. Bei weiterem herunter treten des Pedals läßt die einwirkende Energie von oben automatisch nach, und die Feder zieht die Kurbel in die Ausgangspotion zurück, sodaß sich die Kurbel nach getaner Arbeit wieder in vorheriger Länge nach oben bewegt.The pedal crank of the bicycle is for this purpose with a joint provided, which gives the crank arm an angled shape. A spring holds it Crank in this angular form as long as there is no energy pushing the pedal onto the crank acts. When you step down the pedal, the angled crank stretches like, too the spring and becomes longer. The crank arm reaches its greatest length at its greatest So the load is when the crank has moved approx. 90 degrees downwards. If you step down the pedal further, the applied energy from above releases automatically after, and the spring pulls the crank back into the starting position so that the After the work is done, the crank is moved back up to the previous length.

Das Strecken der Kurbel und der Feder kann wieder von neuem beginnen, wenn das Pedal den oberen Totpunkt überschritten hat, und die Kraut des Beines wieder auf das Pedal einwirken ka nn.The stretching of the crank and the spring can start all over again, when the pedal has passed top dead center, and the weed of the leg again can act on the pedal.

Beschreibung Der Kurbelarm welcher sich um die Kurbelachse dreht, besteht aus zwei Teilen, welche gelenkig miteinander verbunden sind und eine Winkelform bilden. Der obere Kurbelteil ist an der Kurbelachse angebracht, während der untere Teil des Kurbelarmes am oberen Arm angelenkt ist und das Pedal trägt. Bei Energie-Einwirkung durch die Beinkraft bewegt sich der untere Kurbelarmteil nach unten, wodurch die Feder sich streckt und der Kurbelarm länger wird und damit den gewüschten Effekt erzielt; mit längerem Hebelarm mehr Leistung zu erzielen.Description The crank arm which rotates around the crank axis, consists of two parts, which are hinged together and an angular shape form. The upper crank part is attached to the crank axle, while the lower Part of the crank arm is hinged to the upper arm and carries the pedal. When exposed to energy the lower part of the crank arm moves downwards due to the leg force, which causes the The spring stretches and the crank arm becomes longer and thus the desired effect achieved; to achieve more performance with a longer lever arm.

Fig. 1 zeigt die durch Gelenk G verbundenen Kurbelarme K 1 End K 2 in oberer Totpunktstellung, wobei die Feder F die beiden Kurbelarme K 1 und K 2 in kurzer Winkelstellung hält.1 shows the crank arms K 1 end K 2 connected by joint G in top dead center position, the spring F controlling the two crank arms K 1 and K 2 holds in a short angular position.

Fig. 2 zeigt die kurbelarm K 1 und K 2 sich um die Kurbelachsmitte A drehend, und wie durch Engerieeinwirkung auf das Pedal P die Feder F sich gestreckt hat, und dabei der Kurbelarm K 1 und K 2 länger geworden ist und die Endstellung erreicht hat in welcher der größte Nutzeffekt erzielt wird.Fig. 2 shows the crank arms K 1 and K 2 around the center of the crank axis A turning, and as if by the action of energy on the pedal P the spring F is stretched has, and the crank arms K 1 and K 2 have become longer and the end position has reached in which the greatest efficiency is achieved.

- - Leerseite -- - blank page -

Claims (1)

Patentanspruche. Claims. Gelenk-Tretkurbel für Fahrrad.Articulated crank for bicycles. Gelenk-Tretkurbel für Fahrrad dadurch gekennzeichnet, daß der Kurbelarm welcher an der Tretlagerachse befestigt ist, durch ein Gelenk in zwei Arme unterteilt,ist, und durch eine oder mehere Federn in Position gehalten wird, wobei durch Energieeinwirkung auf das Pedal, die Länge der Tretkurbel verändert werden kann.Articulated crank for bicycles, characterized in that the crank arm which is attached to the bottom bracket axle, divided into two arms by a joint, is, and held in position by one or more springs, with the action of energy on the pedal, the length of the crank can be changed.
DE19843425342 1984-03-24 1984-07-10 Articulated tread crank for bicycle Withdrawn DE3425342A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19843425342 DE3425342A1 (en) 1984-03-24 1984-07-10 Articulated tread crank for bicycle

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19843411008 DE3411008A1 (en) 1984-03-24 1984-03-24 Tread crank for bicycle
DE19843416309 DE3416309A1 (en) 1984-03-24 1984-05-03 Crank mechanism
DE19843425342 DE3425342A1 (en) 1984-03-24 1984-07-10 Articulated tread crank for bicycle

Publications (1)

Publication Number Publication Date
DE3425342A1 true DE3425342A1 (en) 1986-01-16

Family

ID=27191833

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19843425342 Withdrawn DE3425342A1 (en) 1984-03-24 1984-07-10 Articulated tread crank for bicycle

Country Status (1)

Country Link
DE (1) DE3425342A1 (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4793208A (en) * 1985-03-13 1988-12-27 Societe Look Crank-gear for bicycle or similar locomotion vehicle
US5157988A (en) * 1991-06-11 1992-10-27 Pinkstock Donald H Elastic crank for bicycles
DE4139689A1 (en) * 1991-08-16 1993-02-18 Rees Bertram Dipl Paed Bicycle pedal crank with variable geometry - has two crank arms commonly rotatable on pedal bearing axis, each comprising two articulated arm parts
DE4227229A1 (en) * 1992-08-17 1994-02-24 Karlernst Sewing Automatic gear change system for bicycles - has elastic element for mechanical coupling of crank and chain wheel
DE19517677A1 (en) * 1995-05-13 1996-11-21 Christian Seibert Crank for converting a linear movement into a rotary movement, or vice versa
WO1999022981A1 (en) * 1997-10-30 1999-05-14 Haaheim Oeyvind Cycle crank
WO2000056596A1 (en) * 1999-03-22 2000-09-28 Gerhard Hilber Tread crank drive mechanism for a bicycle
US6253639B1 (en) * 1996-11-22 2001-07-03 Ronald Hugh Richardson Extensible crank
WO2005087576A1 (en) * 2004-03-09 2005-09-22 Dabbaj Rad H Drive mechanism and vehicle
US20230192229A1 (en) * 2021-12-16 2023-06-22 John Daniel Corder Pivoting Crank Arm for Increased Torque

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4793208A (en) * 1985-03-13 1988-12-27 Societe Look Crank-gear for bicycle or similar locomotion vehicle
US5157988A (en) * 1991-06-11 1992-10-27 Pinkstock Donald H Elastic crank for bicycles
DE4139689A1 (en) * 1991-08-16 1993-02-18 Rees Bertram Dipl Paed Bicycle pedal crank with variable geometry - has two crank arms commonly rotatable on pedal bearing axis, each comprising two articulated arm parts
DE4227229A1 (en) * 1992-08-17 1994-02-24 Karlernst Sewing Automatic gear change system for bicycles - has elastic element for mechanical coupling of crank and chain wheel
DE19517677A1 (en) * 1995-05-13 1996-11-21 Christian Seibert Crank for converting a linear movement into a rotary movement, or vice versa
US6253639B1 (en) * 1996-11-22 2001-07-03 Ronald Hugh Richardson Extensible crank
WO1999022981A1 (en) * 1997-10-30 1999-05-14 Haaheim Oeyvind Cycle crank
AU732911B2 (en) * 1997-10-30 2001-05-03 Oyvind Haaheim Cycle crank
WO2000056596A1 (en) * 1999-03-22 2000-09-28 Gerhard Hilber Tread crank drive mechanism for a bicycle
WO2005087576A1 (en) * 2004-03-09 2005-09-22 Dabbaj Rad H Drive mechanism and vehicle
US20230192229A1 (en) * 2021-12-16 2023-06-22 John Daniel Corder Pivoting Crank Arm for Increased Torque
US11814134B2 (en) * 2021-12-16 2023-11-14 John Daniel Corder Pivoting crank arm for increased torque

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