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 crankInfo
- 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- Withdrawn
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.
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)
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)
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 |
-
1986
- 1986-09-11 FR FR8612691A patent/FR2603863A1/en not_active Withdrawn
Patent Citations (4)
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)
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 |