[go: up one dir, main page]

DE54884C - Bicycle crank whose lever arm length can change automatically - Google Patents

Bicycle crank whose lever arm length can change automatically

Info

Publication number
DE54884C
DE54884C DENDAT54884D DE54884DA DE54884C DE 54884 C DE54884 C DE 54884C DE NDAT54884 D DENDAT54884 D DE NDAT54884D DE 54884D A DE54884D A DE 54884DA DE 54884 C DE54884 C DE 54884C
Authority
DE
Germany
Prior art keywords
tubes
lever arm
arm length
change automatically
bicycle crank
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
DENDAT54884D
Other languages
German (de)
Original Assignee
FÖRSTER, Landmesser, in Homberg, Reg.-Bez. Cassel
Publication of DE54884C publication Critical patent/DE54884C/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Steering Devices For Bicycles And Motorcycles (AREA)
  • Mechanical Control Devices (AREA)

Description

Hierzu 1 Blatt Zeichnungen.1 sheet of drawings.

Claims (1)

Pa tent-Anspruch:Patent claim: Eine Fahrrad - Trittkurbel, deren Hebelarmlänge sich selbsttätig ändern kann-, bestehend aus zwei parallelen Röhren b h bezw. a i, welche in die Kurbeltrittstange k fest eingeschraubt und in den Röhren cf bezw. dg verschiebbar angeordnet sind, so dafs einerseits durch den Fufsdruck des Radfahrers auf die Stange k ein Herausschieben der Röhren b h bezw. α i aus den in dem Verbindungsstück m η fest verschraubten Röhren cf bezw. dg stattfinden kann, und andererseits- beim Nachlassen dieses Druckes ein Hineinschieben des engeren in das weitere Röhrenpaar durch die Schraubenfeder s bewirkt wird.A bicycle - crank, the lever arm length can change automatically, consisting of two parallel tubes bh respectively. ai, which is screwed tightly into the crank step rod k and respectively cf in the tubes. dg are arranged displaceably, so that on the one hand by the foot pressure of the cyclist on the rod k a pushing out of the tubes bh respectively. α i from the tubes cf and respectively firmly screwed into the connecting piece m η. dg can take place, and on the other hand, when this pressure is released, the narrower pair of tubes is pushed into the wider pair of tubes by the helical spring s .
DENDAT54884D Bicycle crank whose lever arm length can change automatically Expired - Lifetime DE54884C (en)

Publications (1)

Publication Number Publication Date
DE54884C true DE54884C (en)

Family

ID=329452

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT54884D Expired - Lifetime DE54884C (en) Bicycle crank whose lever arm length can change automatically

Country Status (1)

Country Link
DE (1) DE54884C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001000480A1 (en) 1999-06-17 2001-01-04 Kageneck Karl Erbo Graf Pedal drive, especially for bicycles

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001000480A1 (en) 1999-06-17 2001-01-04 Kageneck Karl Erbo Graf Pedal drive, especially for bicycles

Similar Documents

Publication Publication Date Title
DE54884C (en) Bicycle crank whose lever arm length can change automatically
DE54895C (en) Through the. Driver's thigh actuated auxiliary drive device for bicycles
DE179263C (en)
DE153076C (en)
DE42757C (en) Adjustable bicycle saddle
DE121653C (en)
DE32685C (en) Tubular vice
DE97194C (en)
DE88015C (en)
DE103016C (en)
DE95156C (en)
DE282458C (en)
DE172143C (en)
US578260A (en) James oag and john mcdonald
DE263094C (en)
DE190608C (en)
DE23250C (en) Brake for railway vehicles
DE84105C (en)
DE34485C (en) Spring steering knuckles for strollers
DE94318C (en)
DE110927C (en)
DE85186C (en)
DE40197C (en) Hand drive device for bicycles
DE162563C (en)
DE91779C (en)