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

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