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GB1489985A - Derailleur gear for a bicycle - Google Patents

Derailleur gear for a bicycle

Info

Publication number
GB1489985A
GB1489985A GB684175A GB684175A GB1489985A GB 1489985 A GB1489985 A GB 1489985A GB 684175 A GB684175 A GB 684175A GB 684175 A GB684175 A GB 684175A GB 1489985 A GB1489985 A GB 1489985A
Authority
GB
United Kingdom
Prior art keywords
wheel
parallelogram linkage
road
arm
chain
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
GB684175A
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 GB1489985A publication Critical patent/GB1489985A/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
    • B62M9/12—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 the chain, belt, or the like being laterally shiftable, e.g. using a rear derailleur
    • B62M9/121—Rear derailleurs
    • B62M9/124—Mechanisms for shifting laterally
    • B62M9/1242—Mechanisms for shifting laterally characterised by the linkage mechanisms

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Steering Devices For Bicycles And Motorcycles (AREA)
  • Axle Suspensions And Sidecars For Cycles (AREA)
  • Transmission Devices (AREA)
  • Transmissions By Endless Flexible Members (AREA)

Abstract

1489985 Chain-shift change-speed gear R HURET and J HURET 18 Feb 1975 [18 Feb 1974] 6841/75 Heading F2D A chain-shift change-speed gear for a bicycle has a mounting plate assembly 11a, 11b, for guide and tension sprockets 7, 8, carried, for chain tensioning movement in planes parallel to that of the cycle road-wheel, on a first support parallelogram linkage 3, lying in a plane perpendicular to the axis 2 of the road-wheel spindle and having one side formed by a rigid connecting member 4 forming a part of controllable means for producing ratio-selecting movement in directions transverse to the plane of the road-wheel. In one embodiment, Figs. 4 and 5, not shown, the transverse movement is provided by a simple guided slide-bolt (23), whilst in Figs. 1 and 3, shown, a second parallelogram linkage 1 in a plane parallel to that of the axis 2 of the wheel spindle, carries the first support parallelogram linkage 3. One U-shaped arm la of the second parallelogram linkage 1 is secured to the cycle frame, whilst its opposite arm 4, also U-shaped, and pivoting on pins 5 on side arms 1b, 1c, forms the rigid connecting body which constitutes also one arm of the first support parallelogram linkage 3, for which purpose it has ears 4b, 4c, pivoted at 4i on side arms 3a, 3c, pivoted to the opposite arm 3b, one pivot 3d of which forms the spindle bolt 9 of the chain guide sprocket 7 and also serves to attach the mounting plate assembly 11 to the support linkage 3. Arms 12a, 12b of a torsion coil spring 12 react on lugs 3g on the arm 3b and lie on the plate 11c, to bias the assembly about the spindle 9 in the chain tensioning direction 13. Stops 3f, 3h limit the pivotal movement. In Figs. 4 and 5, not shown, the connecting body 4 of Fig. 1 is secured to a square-sectioned pin (23) slidable transversely of the road-wheel in a guide cylinder (21) fixed to the cycle frame (at 22) and shifted transversely by a spring- opposed Bowden cable (29) acting through a lever (26).
GB684175A 1974-02-18 1975-02-18 Derailleur gear for a bicycle Expired GB1489985A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7405411A FR2261454B1 (en) 1974-02-18 1974-02-18

Publications (1)

Publication Number Publication Date
GB1489985A true GB1489985A (en) 1977-10-26

Family

ID=9135046

Family Applications (1)

Application Number Title Priority Date Filing Date
GB684175A Expired GB1489985A (en) 1974-02-18 1975-02-18 Derailleur gear for a bicycle

Country Status (5)

Country Link
JP (1) JPS5824314B2 (en)
DE (1) DE2506693C2 (en)
FR (1) FR2261454B1 (en)
GB (1) GB1489985A (en)
IT (1) IT1029773B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1582449A2 (en) * 2004-03-29 2005-10-05 Shimano (Singapore) Private, Limited Bicycle derailleur

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2466388A1 (en) * 1979-10-05 1981-04-10 Huret Roger DERAILLEUR FOR CYCLE
US20070202978A1 (en) † 2006-02-28 2007-08-30 Shimano, Inc. Low profile rear derailleur

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1582449A2 (en) * 2004-03-29 2005-10-05 Shimano (Singapore) Private, Limited Bicycle derailleur
EP1582449A3 (en) * 2004-03-29 2006-02-15 Shimano (Singapore) Private, Limited Bicycle derailleur

Also Published As

Publication number Publication date
DE2506693C2 (en) 1986-10-09
FR2261454B1 (en) 1976-06-25
JPS5824314B2 (en) 1983-05-20
IT1029773B (en) 1979-03-20
FR2261454A1 (en) 1975-09-12
JPS50114744A (en) 1975-09-08
DE2506693A1 (en) 1975-08-21

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Legal Events

Date Code Title Description
PS Patent sealed
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee