FR2603863A1 - Device making it possible to increase the lever force of a bicycle crank - Google Patents

Device making it possible to increase the lever force of a bicycle crank

Info

Publication number
FR2603863A1
FR2603863A1 FR8612691A FR8612691A FR2603863A1 FR 2603863 A1 FR2603863 A1 FR 2603863A1 FR 8612691 A FR8612691 A FR 8612691A FR 8612691 A FR8612691 A FR 8612691A FR 2603863 A1 FR2603863 A1 FR 2603863A1
Authority
FR
France
Prior art keywords
crank
pedal
increase
parallelogram
device making
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Withdrawn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
FR8612691A
Other languages
French (fr)
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
Application filed by Individual filed Critical Individual
Priority to FR8612691A priority Critical patent/FR2603863A1/en
Publication of FR2603863A1 publication Critical patent/FR2603863A1/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Withdrawn legal-status Critical Current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
    • 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)
  • Transmission Devices (AREA)

Abstract

The invention relates to a device 2 in the form of a deformable parallelogram, supporting a pedal at the end. It is articulated 5 onto a crank 1, designed to receive it, thus forming part of the parallelogram, and of conventional length. When a force is applied to the pedal, the parallelogram flattens and extends over the crank which supports it, thus increasing, with its addition, the lever length of this crank. When the applied force ends when reascending, a spring 4 incorporated with the device straightens it and the crank resumes its normal length, thus limiting the circumferential distance travelled by the pedal about the pedal-crank axis.
FR8612691A 1986-09-11 1986-09-11 Device making it possible to increase the lever force of a bicycle crank Withdrawn FR2603863A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8612691A FR2603863A1 (en) 1986-09-11 1986-09-11 Device making it possible to increase the lever force of a bicycle crank

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8612691A FR2603863A1 (en) 1986-09-11 1986-09-11 Device making it possible to increase the lever force of a bicycle crank

Publications (1)

Publication Number Publication Date
FR2603863A1 true FR2603863A1 (en) 1988-03-18

Family

ID=9338843

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8612691A Withdrawn FR2603863A1 (en) 1986-09-11 1986-09-11 Device making it possible to increase the lever force of a bicycle crank

Country Status (1)

Country Link
FR (1) FR2603863A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5207119A (en) * 1992-02-06 1993-05-04 Francois Garneau Pedal mechanism for a human propulsion vehicle
WO2003080422A1 (en) * 2002-03-26 2003-10-02 Enos Polvanesi Improved pedal unit for bicycles
ITRM20130630A1 (en) * 2013-11-15 2015-05-16 Pilla Luciano Di MOTORCYCLE PROCESSING SYSTEM
CN110588874A (en) * 2019-09-30 2019-12-20 王存国 Bicycle with a wheel

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR809599A (en) * 1936-08-13 1937-03-06 Extendable crank device applicable in particular to cycles
FR953230A (en) * 1946-10-02 1949-12-02 Mechanism for increasing the propulsive power of bicycles
DE899455C (en) * 1950-08-09 1953-12-10 Christian Oeste The effective length of the bicycle crank can be changed
FR2388713A1 (en) * 1977-04-26 1978-11-24 Miquet Andre Offset bicycle pedal mechanism - has guide fingers on pedal arms working in cam grooves and parallelogram linkages

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR809599A (en) * 1936-08-13 1937-03-06 Extendable crank device applicable in particular to cycles
FR953230A (en) * 1946-10-02 1949-12-02 Mechanism for increasing the propulsive power of bicycles
DE899455C (en) * 1950-08-09 1953-12-10 Christian Oeste The effective length of the bicycle crank can be changed
FR2388713A1 (en) * 1977-04-26 1978-11-24 Miquet Andre Offset bicycle pedal mechanism - has guide fingers on pedal arms working in cam grooves and parallelogram linkages

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5207119A (en) * 1992-02-06 1993-05-04 Francois Garneau Pedal mechanism for a human propulsion vehicle
WO2003080422A1 (en) * 2002-03-26 2003-10-02 Enos Polvanesi Improved pedal unit for bicycles
ITRM20130630A1 (en) * 2013-11-15 2015-05-16 Pilla Luciano Di MOTORCYCLE PROCESSING SYSTEM
CN110588874A (en) * 2019-09-30 2019-12-20 王存国 Bicycle with a wheel

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Legal Events

Date Code Title Description
ST Notification of lapse