GB921614A - Improvements in double sprocket pedal crank wheels for bicycles - Google Patents

Improvements in double sprocket pedal crank wheels for bicycles

Info

Publication number
GB921614A
GB921614A GB3847159A GB3847159A GB921614A GB 921614 A GB921614 A GB 921614A GB 3847159 A GB3847159 A GB 3847159A GB 3847159 A GB3847159 A GB 3847159A GB 921614 A GB921614 A GB 921614A
Authority
GB
United Kingdom
Prior art keywords
rims
screws
bicycles
spokes
nov
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
GB3847159A
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
Publication of GB921614A publication Critical patent/GB921614A/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
    • B62M9/10—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio using a single chain, belt, or the like involving different-sized wheels, e.g. rear sprocket chain wheels selectively engaged by the chain, belt, or the like
    • B62M9/105—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio using a single chain, belt, or the like involving different-sized wheels, e.g. rear sprocket chain wheels selectively engaged by the chain, belt, or the like involving front sprocket chain-wheels engaged by the chain, belt or the like

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Automatic Cycles, And Cycles In General (AREA)

Abstract

921,614. Chain - wheels; securing together rotary parts. T. CAMPAGNOLO. Nov. 12, 1959 [Nov. 19, 1958], No. 38471/59. Classes 80 (1) and 80 (2). In a bicycle pedal crankwheel comprising two sprocket rims 2, 3 secured to spokes 1 radiating from a hub 6 having a crank 7, the outermost faces of the rims, spokes and the securing means are flush, the rims being secured to the spoke ends by interthreaded hollow screws 4, 5 having their heads located in recesses in the rims. The screws 4 have polygonal key apertures whilst the screws 5 have screwdriver slots. The bore 11 of the hub 6 is closed on the crank side by a small externally-screwed dished cover 10 having a central polygonal key aperture.
GB3847159A 1958-11-19 1959-11-12 Improvements in double sprocket pedal crank wheels for bicycles Expired GB921614A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT1712758 1958-11-19

Publications (1)

Publication Number Publication Date
GB921614A true GB921614A (en) 1963-03-20

Family

ID=11149888

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3847159A Expired GB921614A (en) 1958-11-19 1959-11-12 Improvements in double sprocket pedal crank wheels for bicycles

Country Status (1)

Country Link
GB (1) GB921614A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50103356U (en) * 1974-01-29 1975-08-26
EP0002964A1 (en) * 1977-12-28 1979-07-11 Shimano Industrial Company Limited Chain wheel and crank assembly for a cycle
US4380445A (en) * 1974-08-16 1983-04-19 Shimano Industrial Company Limited Transmission for a bicycle
EP0431573A1 (en) * 1989-12-05 1991-06-12 Maeda Industries, Ltd. Bicycle gear crank assembly

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50103356U (en) * 1974-01-29 1975-08-26
US4380445A (en) * 1974-08-16 1983-04-19 Shimano Industrial Company Limited Transmission for a bicycle
EP0002964A1 (en) * 1977-12-28 1979-07-11 Shimano Industrial Company Limited Chain wheel and crank assembly for a cycle
US4439172A (en) * 1977-12-28 1984-03-27 Shimano Industrial Company Limited Chain gear and crank mounting assembly
EP0431573A1 (en) * 1989-12-05 1991-06-12 Maeda Industries, Ltd. Bicycle gear crank assembly
US5062318A (en) * 1989-12-05 1991-11-05 Maeda Industries, Ltd. Bicycle gear crank assembly

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