DE4216333C2 - Tandem bike with two pedal cranks - as well as a crank arm assembly - Google Patents

Tandem bike with two pedal cranks - as well as a crank arm assembly

Info

Publication number
DE4216333C2
DE4216333C2 DE19924216333 DE4216333A DE4216333C2 DE 4216333 C2 DE4216333 C2 DE 4216333C2 DE 19924216333 DE19924216333 DE 19924216333 DE 4216333 A DE4216333 A DE 4216333A DE 4216333 C2 DE4216333 C2 DE 4216333C2
Authority
DE
Germany
Prior art keywords
pedal
tandem
chain
crank
tandem bicycle
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 - Lifetime
Application number
DE19924216333
Other languages
German (de)
Other versions
DE4216333A1 (en
Inventor
Hans-Joachim Buender
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.)
BUENDER HANS JOACHIM
Original Assignee
BUENDER HANS JOACHIM
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 BUENDER HANS JOACHIM filed Critical BUENDER HANS JOACHIM
Publication of DE4216333A1 publication Critical patent/DE4216333A1/en
Application granted granted Critical
Publication of DE4216333C2 publication Critical patent/DE4216333C2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C31/00—Aircraft intended to be sustained without power plant; Powered hang-glider-type aircraft; Microlight-type aircraft
    • B64C31/04—Man-powered aircraft
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
    • B62K3/00—Bicycles
    • B62K3/12—Tandems
    • 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
    • B62M15/00—Transmissions characterised by use of crank shafts and coupling rods
    • 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
    • B62M9/00—Transmissions characterised by use of an endless chain, belt, or the like
    • B62M9/02—Transmissions characterised by use of an endless chain, belt, or the like of unchangeable ratio
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C27/00—Rotorcraft; Rotors peculiar thereto
    • B64C27/04—Helicopters

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Transmission Devices (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
  • Motorcycle And Bicycle Frame (AREA)

Description

Die Erfindung betrifft ein Tandemfahrrad.The invention relates to a tandem bicycle.

Allgemein sind Tandemfahrräder vielfach bekannt. So ist aus der CH-PS 93474 ein entsprechendes Fahrrad bekannt, bei dem der Antrieb mit Trethebeln erfolgt. Das Fahrrad der benannten Patentanschrift ist jedoch mit um eine Achse schwingbaren, aber nicht umlau­ fenden Trethebeln ausgeführt.In general, tandem bicycles are widely known. So that's it the CH-PS 93474 known a corresponding bike in which the drive is done with pedal levers. The bike of the named However, the patent address is swingable about an axis, but not umlau running pedal levers.

Ferner ist aus der FR-PS 901901 die Anordnung einer Tretkurbel mit beidseitiger Kurbelschwingenvorrichtung bei einem Fahrrad bekannt.Furthermore, the arrangement of a pedal crank is from FR-PS 901901 with double-sided crank swing device on a bicycle known.

Das deutsche Hauptpatent 41 19 736 offenbart ein einsitziges Fahrrad mit einer "Pedalkurbel- sowie Kurbel­ schwingeneinrichtung", das über zwei Antriebsketten einschließ­ lich einer ein- oder mehrgängigen Nabe mit zwei wechselseitigen Antriebsritzeln beschleunigt und mühelos angetrieben wird, wobei je eine Kurbelschwinge als zweiseitiger langer Hebel mit je einem in ihrem vorderen Bereich angeordneter Längsführung auf je eine der Pedalachsen der kreisenden Tretkurbel angelenkt ist, wobei das hintere Ende der jeweiligen Kurbelschwinge auf die rahmen­ feste Achse im Bereich hinter der Nabe des erfinderischen Fahrrades zugleich auf- und niederschwenkend gelagert ist.The main German patent 41 19 736 discloses a single seat bike with a "pedal crank as well as crank swing arm device ", which includes two drive chains Lich a single or multi-speed hub with two mutual Drive pinions are accelerated and driven effortlessly one crank arm each as a two-sided long lever with one each in its front area arranged longitudinal guide to one the pedal axles of the orbiting pedal crank is articulated, whereby the rear end of each crank arm on the frame fixed axis in the area behind the hub of the inventive Bicycle is pivoted up and down at the same time.

Deren Zusatzpatent 41 37 078 offenbart ferner als vorteil­ hafte Weiterentwicklung zwei Ausführungsbeispiele insbesondere die der verschiedenartigsten Kurbelschwingen mit rahmenangelenk­ ten Wippbalken und Wippbügeln einschließlich deren Niederdrück­ ritzeln auf die gestraffte Antriebskette.Their additional patent 41 37 078 also discloses as an advantage Adhesive further development two exemplary embodiments in particular that of the most varied crank arms with frame joint rocker bars and rocker arms including their pushing down sprocket on the tightened drive chain.

Aufgabe der vorliegenden und offenbarten Erfindung ist es, ein Tandemfahrrad bereitzustellen, das wesentlich schneller fährt als herkömmliche Tandemfahrräder, ebenso besetzt mit zwei Pedaleuren.The object of the present and disclosed invention is to provide a tandem bike that is much faster rides as conventional tandem bikes, also occupied two pedals.

Gelöst wird die Aufgabe mit dem Tandemfahrrad nach Anspruch 1.The problem is solved with the tandem bicycle according to claim 1.

Anhand von drei Zeichnungen wird das vorgestellte Tandemfahrrad beschrieben. The tandem bike presented is illustrated by three drawings described.  

Die Zeichnung der Fig. 1 zeigt das erf. Fahrrad von der Seite, vorne mit kreisender Pedalkurbel einschließlich deren beiden gleichgroßen Kettenkränzen und Antriebsketten sowie rahmenfesten Federkettenspannern und hinten mit kreisender Pedalkurbel, jedoch ohne Kettenkränze und der auf je eine Pedalachse angelenk­ ten hin- und hergehenden Kurbelschwinge als zweiseitigen langen Hebel im rechten Winkel zur Pedaldruckrichtung nebst rahmen­ angelenktem Wippbalken und Wippbügel einschließlich deren Niederdrückritzel, wobei die niedergedrückte Antriebskette der linken Fahrradseite das Fahrrad vorantreibt.The drawing of Fig. 1 shows the bicycle from the side, at the front with a circling pedal crank including its two equally large chain rings and drive chains and frame-fixed spring chain tensioners and at the rear with a circling pedal crank, but without chain rings and the reciprocating articulated on each pedal axis Crank arm as a two-sided long lever at right angles to the pedal pressure direction together with the articulated rocker beam and rocker arm including their push-down pinions, with the depressed drive chain on the left side of the bicycle driving the bicycle forward.

Fig. 2 zeigt das erf. Tandemfahrrad nach der Fig. 1, jedoch mit im etwa oberen Totpunkt stehenden beiden Pedalkurbelarmen, wobei der angelenkte Kurbelschwingenarm schon recht wirksam ist, ebenfalls in Seitenansicht. FIG. 2 shows the tandem bicycle according to FIG. 1, but with the two pedal crank arms at approximately top dead center, the articulated crank arm being quite effective, also in a side view.

Und Fig. 3 zeigt das Fahrrad nach Fig. 1 und 2 in Draufsicht bzw. in Sicht von unten her, jedoch ohne Satteleinzeichnung.And Fig. 3 shows the bicycle according to Fig. 1 and 2 in plan view and in perspective from below, but without Satteleinzeichnung.

Die Funktionsweise des neuen Antriebs beim erf. Tandemfahrrad ist folgende:How the new drive works on the tandem bicycle is the following:

Nach Fig. 1 treten beide Pedaleure gleichzeitig und kräftig auf die etwa im rechten Winkel zur Pedaldruckrichtung stehenden beiden Pedalkurbelarme (PK, PK') mit Pedalen (P, P'), wobei der vordere Pedaleur im vorderen Sattelbereich (86) die überlange Antriebskette (AK, AK') über deren Kettenkranz (KK, KK') hier beispielsweise auf der linken Fahrradseite strafft, während­ dessen der hintere Pedaleur im hinteren Sattelbereich (94) die auf der Pedalachse (PA') sowie rahmengelagerte Wippachse (Z, Z') angelenkte Kurbelschwinge (KS, KS') über den schwenken­ den Wippbalken (V, V') und Wippbügel (W, W') beim kreisenden Pedalieren gleichzeitig auf- und nieder bzw. hin- und herbewegt, wobei deren Niederdrückritzel (T, T') die gestraffte Antriebs­ kette (AK, AK') über das Umlenkritzel (M, M') tief niederdrückt und das Fahrzeug beschleunigt antreibt, wobei der rahmenfeste Federkettenspanner (F, F ') soviel an Kettenglieder hergibt, wie diese stets zur Straffung der überlangen Kette (AK, AK') bei jeder Kurbel- bzw. Kettenkranzumdrehung benötigt werden. According to Fig. 1, both pedals step simultaneously and vigorously onto the two pedal crank arms (PK, PK ') with pedals (P, P'), which are approximately at right angles to the pedal pressure direction, the front pedaler in the front saddle area ( 86 ) carrying the excessively long drive chain ( AK, AK ') tightens over their chain ring (KK, KK') here, for example on the left side of the bicycle, during which the rear pedal in the rear saddle area ( 94 ) tightens the rocking axle (Z, Z ') on the pedal axle (PA') and frame-mounted Articulated crank arm (KS, KS ') over the swivel the seesaw beam (V, V') and seesaw bracket (W, W ') while pedaling in a circular motion up and down or back and forth, their depressing pinion (T, T' ) deeply depresses the tightened drive chain (AK, AK ') via the deflection sprocket (M, M') and accelerates the vehicle, whereby the frame-fixed spring chain tensioner (F, F ') gives as much to chain links as this always tightens the extra long ones Chain (AK, AK ') are required with every crank or chain ring revolution.

Der hintere Pedaleur drückt im gleichen Tretrhythmus bei jeder totalen Umdrehung des Kettenkranzes (KK, KK') mittels der enorm langen Kurbelschwinge (KS, KS') einschließlich deren freilau­ fenden Niederdrückritzel (T, T') bei vollgebildeter Hebelkraft gegen die gestraffte Antriebskette (AK, AK'), drückt diese nieder, wobei das hintere Rad (RR) über Antriebsritzel (R, R') bzw. Nabe (N) des Tandemfahrrades wechselseitig und beschleu­ nigt herumgezogen wird, und das Fahrrad in eine hohe Geschwin­ digkeit bringt, womit das Fahrzeug wesentlich schneller und müheloser fährt, als herkömmliche Tandemfahrräder.The rear pedal presses in the same pedaling rhythm for everyone total rotation of the chain ring (KK, KK ') by means of the enormous long crank arm (KS, KS ') including their free wheel fend down pinion (T, T ') with fully developed leverage against the tightened drive chain (AK, AK '), this presses with the rear wheel (RR) via drive pinion (R, R ') or hub (s) of the tandem bike alternately and accelerate not being dragged around, and the bike at high speed brings speed, which makes the vehicle much faster and rides more effortlessly than conventional tandem bicycles.

Wenn beispielsweise die Pedalkurbelarme (PK, PK') eine optimale Länge von 175 mm. und die angelenkte Kurbelschwinge (KS, KS') eine Länge von 1.050 mm, aufweisen, dann ergibt sich eine fast sechsfache Nebelkraft, dies vorteilhafterweise bei Vermeidung der üblichen Totpunkte, die über das Niederdrückritzel (T, T') auf die stets laufende und gestraffte Antriebskette (AK, AK') einwirkt und wenn dabei beispielsweise ein Verhältnis von 13 Ritzelzähnen zu 91 Zähnen des Kettenkranzes besteht, dann ergibt sich eine nahezu siebenfache Entfaltung, d. h. eine sehr hohe Geschwindigkeit des Tandemfahrrades, wobei ein Kettenkranz mit 91 Zähnen oder noch wesentlich darüber, kraftmäßig natürlich nur noch mit Hilfe des offenbarten erfinder. Antriebs bewältigt werden kann, denn die angelenkte Kurbelschwinge entlastet den vorderen Pedaleur bei jedem Pedalakt.For example, if the pedal crank arms (PK, PK ') are optimal Length of 175 mm. and the articulated crank arm (KS, KS ') have a length of 1,050 mm, then there is an almost six times the fog force, this is advantageously avoided the usual dead center, which is via the depressing pinion (T, T ') on the constantly running and tightened drive chain (AK, AK ') acts and if, for example, a ratio of Then there are 13 pinion teeth to 91 teeth of the chain ring there is an almost sevenfold unfolding, i. H. a very high speed of the tandem bike, with a chain ring with 91 teeth or even more, naturally powerful only with the help of the disclosed inventor. Drive mastered can be, because the articulated crank arm relieves the front pedal for each pedal act.

Um zu gewährleisten, daß die beiden gemäß der Fig. 1 einmal miteinander gleichgestellten Pedalkurbelarme (PK, PK') während des Pedalierens immer so verbleiben, können auf je einer Kurbelachse (KA und KA') je ein kleiner Zahnkranz gleicher Umfangsgröße, so beispielsweise auf der rechten Fahrradseite angeordnet sein, die gemeinsam mit den beiden Kurbelachsen gleichzeitig kreisen und über eine Kette miteinander verbunden sind. (In der Zeichnung nicht dargestellt, da allgemein bekannt.) Die zeichnerische Bezeichnung "RG" bedeutet "Rahmen".In order to ensure that the two pedal crank arms (PK, PK '), once equated with one another according to FIG. 1, always remain as they are during pedaling, a small ring gear of the same circumferential size, for example on, can be placed on each crank axis (KA and KA') be arranged on the right side of the bicycle, which rotate simultaneously with the two crank axles and are connected to one another via a chain. (Not shown in the drawing, since it is generally known.) The graphic designation "RG" means "frame".

Claims (4)

1. Tandemfahrrad, dadurch gekennzeichnet, daß zwei Pedalkurbeln sowie eine Kurbelschwingeneinrichtung vorgesehen ist, daß an den das Antriebsdrehmoment auf die mit zwei gleichgroßen Freilaufritzeln (R, R') ausgestattete Nabe (N) des hinteren Rades (RR) über zwei gleichlange Antriebsketten (AK, AK') der beiden im vorderen Sattelbereich (86) angeordneten gleichgroßen Kettenkränze (KK, KK') wechselseitig übertra­ genden, um 180° gegeneinander versetzte Pedalkurbelarme (PK, PK') einschließlich Pedalen (P, P') ebenso im hinteren Sattelbereich (94) um 180° gegeneinander versetzte Pedalkurbelarme (PK, PK') einschließlich Pedalen (P, P') angeordnet sind, wobei hier je eine Kurbelschwinge (KS, KS') als zweiseitiger langer Hebel mit ihrem vordersten Ende auf je eine Pedalachse (PA, PA') angelenkt ist, wobei der Bereich des hinteren Endes der Kurbelschwinge (KS, KS') über je einen rahmengelagerten Wippbalken (V, V') und um die hinter der Nabe (N) rahmengelagerte Wippachse (Z, Z') drehbar und zugleich auf- und nieder bzw. hin- und herschwenkend geführt wird, wobei der achsgelagerte Wippbügel (W, W') einschließlich deren angeordneten Niederdrückritzel (T, T') die über je einen rahmenfesten Federkettenspanner (F, F') gestraffte Antriebskette (AK, AK') über je ein rahmenfestes Umlenkritzel (M, M') tief niederdrückt und das hintere Rad (RR) bzw. dessen Nabe (N) beschleunigt antreibt und das Tandemfahrrad in eine hohe Geschwindigkeit bringt.1. tandem bicycle, characterized in that two pedal cranks and a rocker arm device is provided that at the drive torque on the with two equally large freewheel sprockets (R, R ') equipped hub (N) of the rear wheel (RR) via two equally long drive chains (AK , AK ') of the two equally sized chain rings (KK, KK') arranged in the front saddle area ( 86 ) are mutually transmitting, 180 ° offset crank arms (PK, PK ') including pedals (P, P') as well as in the rear saddle area ( 94 ) 180 ° offset crank arms (PK, PK ') including pedals (P, P') are arranged, with a crank arm (KS, KS ') as a two-sided long lever with its front end on each pedal axle (PA , PA ') is articulated, the area of the rear end of the crank arm (KS, KS') each having a frame-mounted rocker beam (V, V ') and the rocker axis (Z, Z') mounted behind the hub (N) rotatable and at the same time up and down or swiveling back and forth, the axle-mounted rocker bracket (W, W ') including their arranged push-down sprockets (T, T') each tightened by a frame-fixed spring chain tensioner (F, F ') drive chain (AK, AK ') via a frame-fixed deflection pinion (M, M') and drives the rear wheel (RR) or its hub (N) accelerated and brings the tandem bicycle to high speed. 2. Tandemfahrrad nach Anspruch 1, dadurch gekennzeichnet, daß die Pedalkurbelarme (PK, PK') im vorderen Sattel­ bereich (86) etwas länger bemessen sind als die Pedalkurbelarme (PK, PK') im hinteren Sattelbereich (94). 2. Tandem bicycle according to claim 1, characterized in that the pedal crank arms (PK, PK ') in the front saddle area ( 86 ) are dimensioned somewhat longer than the pedal crank arms (PK, PK') in the rear saddle area ( 94 ). 3. Tandemfahrrad nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß sowohl auf der vorderen als auch auf der hinteren Pedalkurbelachse (KA, KA') je ein kleiner Zahnkranz gleicher Umfangsgröße angeordnet ist, die über eine Kette miteinander verbunden sind.3. tandem bicycle according to claim 1 or 2, characterized in that on both the front and the rear Pedal crank axis (KA, KA ') each a small ring gear same circumferential size is arranged over a chain are interconnected. 4. Tandemfahrrad nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß zwei Tandemfahrräder über ein Gestänge nebeneinander verbunden sein können, und als mobile Fahrzeuge mit Karosserie und Bedachung ausgebildet sind.4. tandem bicycle according to claim 1 or 2, characterized in that two tandem bicycles side by side on a linkage can be connected, and as mobile vehicles with body and roofing are formed.
DE19924216333 1991-06-14 1992-05-16 Tandem bike with two pedal cranks - as well as a crank arm assembly Expired - Lifetime DE4216333C2 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19914119736 DE4119736C2 (en) 1991-06-14 1991-06-14 Drive device for a bicycle or the like, with transmission of the drive force from the pedal cranks via at least one chain to the drive wheel and with a crank arm device

Publications (2)

Publication Number Publication Date
DE4216333A1 DE4216333A1 (en) 1993-11-18
DE4216333C2 true DE4216333C2 (en) 1999-07-29

Family

ID=6433994

Family Applications (3)

Application Number Title Priority Date Filing Date
DE19914119736 Expired - Fee Related DE4119736C2 (en) 1991-06-14 1991-06-14 Drive device for a bicycle or the like, with transmission of the drive force from the pedal cranks via at least one chain to the drive wheel and with a crank arm device
DE19924216333 Expired - Lifetime DE4216333C2 (en) 1991-06-14 1992-05-16 Tandem bike with two pedal cranks - as well as a crank arm assembly
DE19924219437 Withdrawn DE4219437A1 (en) 1991-06-14 1992-06-13 Aircraft with two pedal cranks and a rocker arm mechanism powered by rotors and propellers

Family Applications Before (1)

Application Number Title Priority Date Filing Date
DE19914119736 Expired - Fee Related DE4119736C2 (en) 1991-06-14 1991-06-14 Drive device for a bicycle or the like, with transmission of the drive force from the pedal cranks via at least one chain to the drive wheel and with a crank arm device

Family Applications After (1)

Application Number Title Priority Date Filing Date
DE19924219437 Withdrawn DE4219437A1 (en) 1991-06-14 1992-06-13 Aircraft with two pedal cranks and a rocker arm mechanism powered by rotors and propellers

Country Status (1)

Country Link
DE (3) DE4119736C2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006023367A1 (en) * 2006-05-15 2007-11-22 Bünder, Hans-Joachim Muscularity device`s overhauling gear providing method for e.g. helicopter, involves causing large hand gear force for pilot that is stepped on pedal, with approximately optimal fivefold service force on drive chain

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4137078C2 (en) * 1991-06-14 1995-10-12 Buender Hans Joachim Drive device for a bicycle or the like
DE4119736C2 (en) * 1991-06-14 1994-02-24 Buender Hans Joachim Drive device for a bicycle or the like, with transmission of the drive force from the pedal cranks via at least one chain to the drive wheel and with a crank arm device
DE4417765A1 (en) * 1994-05-20 1995-11-23 Siegfried Richter Lever drive mechanism for bicycle or wheel chair
CN110877725A (en) * 2019-08-28 2020-03-13 徐方 Manpower flying umbrella

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH93474A (en) * 1921-05-04 1922-03-01 Helm Johannes Bicycle.
FR901901A (en) * 1944-02-11 1945-08-09 Full compound crankset
DE4119736C2 (en) * 1991-06-14 1994-02-24 Buender Hans Joachim Drive device for a bicycle or the like, with transmission of the drive force from the pedal cranks via at least one chain to the drive wheel and with a crank arm device
DE4137078C2 (en) * 1991-06-14 1995-10-12 Buender Hans Joachim Drive device for a bicycle or the like

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE390906C (en) * 1924-02-26 August Freund Pedal lever drive for bicycles
DE648657C (en) * 1937-08-06 Otto Haupt Double chain wheel change gear for bicycles
US4574649A (en) * 1982-03-10 1986-03-11 B. D. Yim Propulsion and speed change mechanism for lever propelled bicycles

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH93474A (en) * 1921-05-04 1922-03-01 Helm Johannes Bicycle.
FR901901A (en) * 1944-02-11 1945-08-09 Full compound crankset
DE4119736C2 (en) * 1991-06-14 1994-02-24 Buender Hans Joachim Drive device for a bicycle or the like, with transmission of the drive force from the pedal cranks via at least one chain to the drive wheel and with a crank arm device
DE4137078C2 (en) * 1991-06-14 1995-10-12 Buender Hans Joachim Drive device for a bicycle or the like

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006023367A1 (en) * 2006-05-15 2007-11-22 Bünder, Hans-Joachim Muscularity device`s overhauling gear providing method for e.g. helicopter, involves causing large hand gear force for pilot that is stepped on pedal, with approximately optimal fivefold service force on drive chain

Also Published As

Publication number Publication date
DE4119736C2 (en) 1994-02-24
DE4216333A1 (en) 1993-11-18
DE4219437A1 (en) 1993-12-16
DE4119736A1 (en) 1993-01-21

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