GB631997A - Improvements in or relating to mechanism for multiplying the propulsive power in bicycles and the like - Google Patents

Improvements in or relating to mechanism for multiplying the propulsive power in bicycles and the like

Info

Publication number
GB631997A
GB631997A GB25606/47A GB2560647A GB631997A GB 631997 A GB631997 A GB 631997A GB 25606/47 A GB25606/47 A GB 25606/47A GB 2560647 A GB2560647 A GB 2560647A GB 631997 A GB631997 A GB 631997A
Authority
GB
United Kingdom
Prior art keywords
arm
crank
bicycles
propulsive power
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.)
Expired
Application number
GB25606/47A
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.)
RIGOBERTO SIRERA LLOPART
Original Assignee
RIGOBERTO SIRERA LLOPART
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 RIGOBERTO SIRERA LLOPART filed Critical RIGOBERTO SIRERA LLOPART
Publication of GB631997A publication Critical patent/GB631997A/en
Expired 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)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
  • Transmission Devices (AREA)

Abstract

631,997. Crank mechanism. LLOPART, R. S. Sept. 19, 1947, Nos. 25606 and'25607. Convention dates, Oct. 2, 1946, and Aug. 13, 1947. [Class 80 (iii)] [Also in Group XXXI] Mechanism for increasing the propulsive power of bicycles comprises a pair of extensible pedal cranks each comprising two arms 1, 2 connected together by links 5 so as to be capable of relative displacement in order to vary the distance between the pedal axle 4 carried by the arm 1 and the crank shaft 3 on which the arm 2 is mounted, projections 9, 10 being provided on the arm 1 for limiting the maximum and minimum lengths of the cranks and a member 11 on one of the crank arms 2 for fixing a sprocket to cooperate with a bicycle chain. A spring 7 is fixed at one end to a pin 13 which rigidly connects the crank shaft 3 to the arm 2 and at the other end to the projection 9 on the arm 1. The tension of the spring may be varied by varying the distance between the supports 9, 13 by screwing.
GB25606/47A 1946-10-02 1947-09-19 Improvements in or relating to mechanism for multiplying the propulsive power in bicycles and the like Expired GB631997A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES631997X 1946-10-02

Publications (1)

Publication Number Publication Date
GB631997A true GB631997A (en) 1949-11-14

Family

ID=8245849

Family Applications (1)

Application Number Title Priority Date Filing Date
GB25606/47A Expired GB631997A (en) 1946-10-02 1947-09-19 Improvements in or relating to mechanism for multiplying the propulsive power in bicycles and the like

Country Status (1)

Country Link
GB (1) GB631997A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5060536A (en) * 1990-03-05 1991-10-29 Boys Donald R Flexible crank drive
GB2243351A (en) * 1990-04-26 1991-10-30 Malcolm Geoffrey Lawrence A pedal and crank drive arrangement
US6253639B1 (en) * 1996-11-22 2001-07-03 Ronald Hugh Richardson Extensible crank
WO2002098723A1 (en) * 2001-06-07 2002-12-12 Ronald Richardson Extensible crank
FR2933062A1 (en) * 2008-06-25 2010-01-01 Jacques Bodinier Pedal device i.e. pedal, for transmission of torque in bicycle, has spring interposed between mechanical part and specific steel axle for transmitting energy, during rising movement of crank, where part is mounted in rotation on crank

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5060536A (en) * 1990-03-05 1991-10-29 Boys Donald R Flexible crank drive
GB2243351A (en) * 1990-04-26 1991-10-30 Malcolm Geoffrey Lawrence A pedal and crank drive arrangement
US6253639B1 (en) * 1996-11-22 2001-07-03 Ronald Hugh Richardson Extensible crank
WO2002098723A1 (en) * 2001-06-07 2002-12-12 Ronald Richardson Extensible crank
FR2933062A1 (en) * 2008-06-25 2010-01-01 Jacques Bodinier Pedal device i.e. pedal, for transmission of torque in bicycle, has spring interposed between mechanical part and specific steel axle for transmitting energy, during rising movement of crank, where part is mounted in rotation on crank

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