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FR849941A - Semi-automatic shifting with expandable sectors for bicycles - Google Patents

Semi-automatic shifting with expandable sectors for bicycles

Info

Publication number
FR849941A
FR849941A FR849941DA FR849941A FR 849941 A FR849941 A FR 849941A FR 849941D A FR849941D A FR 849941DA FR 849941 A FR849941 A FR 849941A
Authority
FR
France
Prior art keywords
bicycles
semi
automatic shifting
expandable sectors
sectors
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
Other languages
French (fr)
Inventor
Cesare Ravetto
Francesco Ravetto
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 filed Critical
Application granted granted Critical
Publication of FR849941A publication Critical patent/FR849941A/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
    • B62M9/00—Transmissions characterised by use of an endless chain, belt, or the like
    • B62M9/04—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio
    • B62M9/06—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio using a single chain, belt, or the like
    • B62M9/08—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio using a single chain, belt, or the like involving eccentrically- mounted or elliptically-shaped driving or driven wheel; with expansible driving or driven wheel

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
FR849941D 1938-02-15 1939-02-06 Semi-automatic shifting with expandable sectors for bicycles Expired FR849941A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT849941X 1938-02-15

Publications (1)

Publication Number Publication Date
FR849941A true FR849941A (en) 1939-12-05

Family

ID=11326871

Family Applications (1)

Application Number Title Priority Date Filing Date
FR849941D Expired FR849941A (en) 1938-02-15 1939-02-06 Semi-automatic shifting with expandable sectors for bicycles

Country Status (1)

Country Link
FR (1) FR849941A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4642070A (en) * 1981-10-26 1987-02-10 Albert C. Nolte, Jr. Automatic variable speed transmission
EP0315380A2 (en) * 1987-11-02 1989-05-10 James F. Pritchard Bicycle transmission

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4642070A (en) * 1981-10-26 1987-02-10 Albert C. Nolte, Jr. Automatic variable speed transmission
EP0315380A2 (en) * 1987-11-02 1989-05-10 James F. Pritchard Bicycle transmission
EP0315380A3 (en) * 1987-11-02 1990-08-22 James F. Pritchard Bicycle transmission

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