FR2402125A1 - Bicycle derailleur type gear change - has sprocket halves pivotable to displace teeth axially to allow constant torque transmission - Google Patents
Bicycle derailleur type gear change - has sprocket halves pivotable to displace teeth axially to allow constant torque transmissionInfo
- Publication number
- FR2402125A1 FR2402125A1 FR7726262A FR7726262A FR2402125A1 FR 2402125 A1 FR2402125 A1 FR 2402125A1 FR 7726262 A FR7726262 A FR 7726262A FR 7726262 A FR7726262 A FR 7726262A FR 2402125 A1 FR2402125 A1 FR 2402125A1
- Authority
- FR
- France
- Prior art keywords
- sprocket
- torque transmission
- gear change
- diameter
- constant torque
- 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- Withdrawn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
- 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
-
- 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
- B62M9/14—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 wheels being laterally shiftable
-
- 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
- B62M9/16—Tensioning or adjusting equipment for chains, belts or the like
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Transmissions By Endless Flexible Members (AREA)
Abstract
A pair of sprocket sectors (35, 36) each having one or more sprocket wheel halves are respectively movable on a rotatable support. They are movable from a position where same diameter halves are in the same plane to form a full sprocket to a position where some teeth of one half move to align with teeth of a different diameter half or an associated different diameter full sprocket (34). This movement causes a bicycle chain (21) to transfer from one diameter sprocket to another whilst retaining driving engagement throughout. Each sector is pivoted at one end on the support about a pin (39a) common to both so that their remote ends move axially for gear changing in either diameter direction.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7726262A FR2402125A1 (en) | 1977-08-29 | 1977-08-29 | Bicycle derailleur type gear change - has sprocket halves pivotable to displace teeth axially to allow constant torque transmission |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7726262A FR2402125A1 (en) | 1977-08-29 | 1977-08-29 | Bicycle derailleur type gear change - has sprocket halves pivotable to displace teeth axially to allow constant torque transmission |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2402125A1 true FR2402125A1 (en) | 1979-03-30 |
Family
ID=9194841
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7726262A Withdrawn FR2402125A1 (en) | 1977-08-29 | 1977-08-29 | Bicycle derailleur type gear change - has sprocket halves pivotable to displace teeth axially to allow constant torque transmission |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2402125A1 (en) |
-
1977
- 1977-08-29 FR FR7726262A patent/FR2402125A1/en not_active Withdrawn
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4030373A (en) | Variable speed drive for a bicycle | |
US4498351A (en) | Continuously variable ratio transmission | |
ES8401396A1 (en) | Variable ratio transmission. | |
EP0311548A3 (en) | Transmission for bicycles | |
US3661021A (en) | Multiple free wheel for a bicycle | |
DE69205258D1 (en) | Electromechanical bicycle gear shift. | |
ES8304493A1 (en) | Control device assuring preset and controlled positions, especially applicable to gear changes of bicycles and similar vehicles. | |
US4810235A (en) | Variable transmission with an integral shifter | |
US10703443B2 (en) | Adjustment mechanism and wheel drive | |
GB1507364A (en) | Shifting mechanism for a bicycle derailleur | |
US4343613A (en) | Derailler system | |
DE60128265D1 (en) | EXHAUSTABLE DRIVE CHAIN WHEEL FOR A BICYCLE GEAR ASSEMBLY | |
IT1114125B (en) | Bicycle derailleur type gear change - has sprocket halves pivotable to displace teeth axially to allow constant torque transmission | |
FR2402125A1 (en) | Bicycle derailleur type gear change - has sprocket halves pivotable to displace teeth axially to allow constant torque transmission | |
EP0248563A2 (en) | Drive transmission apparatus | |
WO1980002129A1 (en) | Sprocket wheel assembly for a chain transmission in particular adapted to bicycles | |
DE68919554D1 (en) | Actuator for a multi-speed bicycle hub. | |
BE845522A (en) | DERAILLEUR DERAILLEUR FOR CENTRAL GEAR BICYCLETS WITH MULTIPLE SPEED RATIO | |
GB931849A (en) | Improvements relating to chain shifting and tensioning mechanism for bicycles and the like | |
FR2476256B1 (en) | TRANSMISSION WHEEL WITH VARIABLE DIAMETER | |
GB2240825A (en) | Variable speed transmission system for bicycles including axially movable sprockets engageable with chain | |
US2866341A (en) | Automatic, selective and cyclical control device | |
US3465606A (en) | Gear shift | |
ATE26241T1 (en) | VARIABLE SPEED GEAR AND ACTUATION MECHANISM THEREOF. | |
DE3667823D1 (en) | SYNCHRONIZER. |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |