GB2560296A - Bicycle derailleur alignment tool - Google Patents
Bicycle derailleur alignment tool Download PDFInfo
- Publication number
- GB2560296A GB2560296A GB1700810.3A GB201700810A GB2560296A GB 2560296 A GB2560296 A GB 2560296A GB 201700810 A GB201700810 A GB 201700810A GB 2560296 A GB2560296 A GB 2560296A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tool body
- rear derailleur
- derailleur hanger
- kit according
- scale
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
- B25B27/0071—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for bicycles
-
- 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
- B62M9/128—Accessories, e.g. protectors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B2210/00—Aspects not specifically covered by any group under G01B, e.g. of wheel alignment, caliper-like sensors
- G01B2210/10—Wheel alignment
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention relates to a derailleur hanger alignment tool for a bicycle and more specifically to an optical tool for identifying any misalignment of a rear derailleur hanger relative to a bicycle wheel rim; and providing a means for correcting any such misalignment. A kit comprises a scale 46 for measuring a distance relative to a wheel rim, and a rear derailleur hanger alignment tool. The alignment tool comprises an elongate tool body 26 having first and second opposite ends; a locating member provided at the first end for connection to a rear derailleur hanger; and a laser 38 for emitting light in a plurality of different directions extending perpendicularly with respect to a longitudinal axis of the tool body 26. The emitted light is receivable on said scale 46 to assist a user in manual correction of any misalignment. The invention also includes a method of aligning a rear derailleur hanger relative to a bicycle wheel rim using the kit of the present invention.
Description
(54) Title of the Invention: Bicycle derailleur alignment tool Abstract Title: Bicycle Derailleur Alignment Tool (57) The invention relates to a derailleur hanger alignment tool for a bicycle and more specifically to an optical tool for identifying any misalignment of a rear derailleur hanger relative to a bicycle wheel rim; and providing a means for correcting any such misalignment. A kit comprises a scale 46 for measuring a distance relative to a wheel rim, and a rear derailleur hanger alignment tool. The alignment tool comprises an elongate tool body 26 having first and second opposite ends; a locating member provided at the first end for connection to a rear derailleur hanger; and a laser 38 for emitting light in a plurality of different directions extending perpendicularly with respect to a longitudinal axis of the tool body 26. The emitted light is receivable on said scale 46 to assist a user in manual correction of any misalignment. The invention also includes a method of aligning a rear derailleur hanger relative to a bicycle wheel rim using the kit of the present invention.
At least one drawing originally filed was informal and the print reproduced here is taken from a later filed formal copy.
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Fig. 3
Fig. 4 (PRIOR ART)
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Fig. 6
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Fig. 7
Fig. 8a
BICYCLE DERAILLEUR ALIGNMENT TOOL
The invention relates to a derailleur hanger alignment tool for a bicycle and more specifically to an optical tool for: (i) identifying any misalignment of a rear derailleur hanger relative to a bicycle wheel rim; and (ii) providing a means for correcting any such misalignment.
The use of a rear derailleur to shift bicycle gears is well known. Typically, the rear derailleur is mounted to a derailleur hanger which is in turn attached to the bicycle frame. The connection between the rear derailleur and the derailleur hanger is usually via a single bolt held captive in the former which engages within a threaded passage in the latter. It will be appreciated that the axial alignment of the threaded passage dictates the positioning of the rear derailleur relative to a bicycle wheel, and the pathway of the bicycle chain. Accurate alignment of the derailleur hanger is therefore crucial to the proper functioning of bicycle gears.
If a rear derailleur experiences an external force - for example when a bicycle falls over and the derailleur impacts against the ground - the derailleur hanger is designed to absorb the force by bending inwardly towards the bicycle wheel (or in more extreme cases, by shearing). The derailleur hanger can therefore be viewed as a sacrificial component designed to minimise accidental damage to the rear derailleur and bicycle frame. It is therefore sometimes necessary to replace and/or realign derailleur hangers to maintain optimum gear shifting performance. Alignment of derailleur hangers is therefore a common and necessary part of bicycle maintenance.
It is known to provide tools for the purpose of measuring and correcting misalignment of derailleur hangers. The basis of their operation is to accurately detect any deviations of a derailleur hanger’s optimum position relative to the rim of a rear bicycle wheel. More specifically, the central axis of the aforementioned threaded passage within a derailleur hanger should be perpendicular to a plane extending centrally through the rear bicycle wheel at all points around its circumference.
Existing tools made for this purpose are entirely mechanical in nature and comprise a number of moveable parts. For example, one such tool is offered by Shimano under its product number TL-RD11. Operating such tools necessitates a degree of skill on the part of the user. For example, the length of the tool must be continuously adjusted to maintain contact with the rim as it is moves around the bicycle wheel due to the eccentric position of the threaded passage of the derailleur hanger relative to the wheel axle. Furthermore, practical difficulties can arise when moving the tool to different circumferential points on the wheel. In particular, during rotation of the tool its sliding pin or rule for contacting the wheel rim typically interferes with several bicycle components or accessories such as the chain, chain stays, seat stays, racks, mudguard arms and the like. Retraction of these moveable parts to bypass such obstructions is not only inconvenient and time consuming, but can introduce measurement errors and sub-optimal outcomes.
In view of the above, the inventor of the present invention has identified a need for an alternative rear derailleur hanger alignment tool which simplifies the alignment and adjustment process and improves the reliability of its measurements.
These and other objects, features, aspects and advantages of the present invention will become apparent to those skilled in the art from the following detailed description, which, taken in conjunction with the accompanying drawings discloses, by way of example only, a preferred embodiment of the present invention.
According to a first aspect of the present invention there is provided a kit for aligning a rear derailleur hanger of a bicycle, the kit comprising a scale for measuring a distance relative to a bicycle wheel rim, and a rear derailleur hanger alignment tool, wherein the rear derailleur hanger alignment tool comprises:
an elongate tool body having first and second opposite ends; a locating member provided at said first end of the tool body for removable connection to a rear derailleur hanger; and an optical device for emitting light in a plurality of different directions extending perpendicularly with respect to said longitudinal axis of the tool body; and wherein the emitted light is receivable on said scale.
Optionally, a rotatory member is coupled to the tool body between its said first and second opposite ends for rotation about the longitudinal axis of the tool body, and said optical device is coupled to the rotatory member.
Optionally, the scale is rim-mountable and provided with an opening facilitating its connection with a fixed point on the wheel rim.
Optionally, said fixed point is a bicycle wheel valve stem or a spoke nipple.
It will be appreciated that both a valve stem and a spoke nipple provide fixed reference points for connection of the scale to a bicycle wheel rim.
Optionally, the rim-mountable scale is provided with indicia along its length representative of distance from a wheel rim to which it is connected.
Optionally, the optical device emits a collimated light beam.
Preferably, the optical device is a laser.
It will be appreciated that a collimated laser beam may be adapted or focussed to provide a small spot relative to any graduations provided on the scale. This facilitates accurate measurement of any differences around different circumferential points on the wheel rim.
Optionally, the rotatory member is coupled to the tool body at a fixed longitudinal position along its length between its said first and second opposite ends.
Advantageously, the rotatory member and its associated optical device do not extend radially relative to the wheel axis to any significant extent, and certainly do not interfere mechanically with any bicycle components or accessories.
Optionally, the rotatory member is capable of 360 degree rotation about the longitudinal axis of the tool body at said fixed longitudinal position.
Optionally, said second end of the tool body is provided with a manually graspable part for the application offeree to effect adjustment of a rear derailleur hanger.
Optionally, the manually graspable part is provided with a knurled, ribbed, or textured surface.
Optionally, the tool body is in the form of an elongate cylindrical rod.
Optionally, the rotatory member is in the form of an annulus.
Optionally, the tool body is provided with spaced apart circumferential grooves within which are provided resilient fasteners for engaging opposing sides of the annulus and retaining it in a predetermined longitudinal position on the tool body.
Optionally, the annulus is provided with a seat portion for seating said optical device in a fixed position thereon.
Optionally, the locating member is a threaded stud receivable within a correspondingly threaded aperture of a rear derailleur hanger.
According to a second aspect of the present invention there is provided a rear derailleur hanger alignment tool comprising:
an elongate tool body having first and second opposite ends; a locating member provided at said first end of the tool body for removable connection to a rear derailleur hanger; and an optical device for emitting light in a plurality of different directions extending perpendicularly with respect to said longitudinal axis of the tool body.
Optionally, a rotatory member is coupled to the tool body between its said first and second opposite ends for rotation about the longitudinal axis of the tool body, and said optical device is coupled to the rotatory member.
According to a third aspect of the present invention there is provided a method of aligning a rear derailleur hanger relative to a bicycle wheel rim using the kit of the first aspect, the method comprising:
mounting the scale onto, or against, the bicycle wheel rim; connecting the locating member to a rear derailleur hanger; activating the optical device;
directing the emitted light against the scale;
recording a first position at which the emitted light is incident on the scale when the bicycle wheel is at a first rotational position;
moving the bicycle wheel to a second rotational position;
recording a second position at which the emitted light is incident on the scale;
caiculating the average of said first and second positions; and applying force to a rear derailleur hanger via the tool body to correct any detected misalignment in a first plane.
It will be appreciated that by moving the rear derailleur hanger to cause the emitted light incident on the scale to move to a point coinciding with the calculated average, this will correct any detected misalignment, it should be noted that, where the context allows, the specific order of some of the above method steps can be altered without affecting the end result. By way of example, the scale may instead be mounted onto the bicycle wheel rim (or placed against it) after connecting the locating member to the rear derailleur hanger.
Optionally, the step of recording a second position is preceded by the step of rotating a rotatory member to which the optical device is attached about a longitudinal axis of the tool body.
Optionally, the aforementioned step of rotating the bicycle wheel rim is subsequently repeated at third and fourth positions lying intermediate said first and second positions;
the average of said third and fourth positions are calculated; and a force is applied to a rear derailleur hanger via the tool body to correct any detected misalignment in a second ane.
It will be appreciated that by correcting any detected misalignment about two perpendicular planes - e.g. horizontal (between the 3 o’clock and 9 o’clock positions) and vertical (between the 12 o'clock and 6 o'clock positions) - optimal gear shifting can be assured.
Embodiments of the present invention will now be described, by way of example only, with reference to the following diagrams, in which:Fig. 1 shows a bicycle rear derailleur hanger;
Fig. 2 shows a rear derailleur prior to attachment to a derailleur hanger coupled to a bicycle frame;
Fig. 3 shows three different views from behind a rear derailleur and illustrating instances of misalignment;
Fig. 4 shows a prior art bicycle rear derailleur hanger alignment tool;
Fig. 5 shows a bicycle rear derailleur hanger alignment tool according to the present invention;
Fig. 6 shows the bicycle rear derailleur hanger alignment tool of Fig. 5 when coupled to a rear derailleur hanger;
Fig. 7 shows the bicycle rear derailleur hanger alignment tool of Figs. 5 and 6 in combination with a scale coupled to the wheel rim prior to activation of the optical device; and
Figs. 8a and 8b show a laser dot incident on the scale when the wheel is rotated to two respective diametrically opposed positions.
An example of a bicycle derailleur hanger 10 is shown in Fig. 1. It comprises two fastener holes 12 for securing the hanger to a bicycle frame 14; a hub socket 16 for accommodating the rear wheel hub when secured to the frame; and a threaded derailleur passage 18 for connection of a rear derailleur 20 (see Fig. 2) to the derailleur hanger 10.
When the rear derailleur 20 is attached to the derailleur hanger 10 for the first time it is necessary to ensure proper alignment of the latter relative to the rear wheel rim of the bicycle around its entire circumference. Optimum alignment is achieved when the plane of the rear derailleur extends perpendicularly with respect to wheel axis. This optimum alignment is indicated in the first drawing within Fig. 3 for a bicycle in a vertical position. The second and third drawings in Fig. 3 are indicative of a misaligned rear derailleur. The type of misalignment shown in the third drawing in Fig. 3 is commonly associated with impact forces imparted to a rear derailleur 20, e.g. after a bicycle falls to the ground causing the derailleur hanger 10 to bend towards the bicycle frame 14.
A known bicycle rear derailleur hanger alignment tool 22 is shown in Fig. 4. The principle of its operation, and its shortcomings, have already been briefly described above.
A derailleur hanger alignment tool 24 according to the present invention is shown in Fig.
5. It comprises an elongate metallic tool body 26 which is cylindrical in cross-section. A first end 28 of the tool body is provided with a locating member in the form of an external screw thread (e.g. in the form of an M10 x 1.0 mm stud) for connection with the corresponding internally threaded derailleur passage 18 of a bicycle derailleur hanger 10 (see Fig. 6). The opposite end 30 of the tool body 26 is provided with a knurled external surface profile handle 32 extending back towards the first end 28 along approximately 50% of the length of the tool body. An annular rotatory member 34 is retained on the tool body 26 at a fixed longitudinal position thereon between two circumferential grooves within which are located resilient circlips 36.
An optical device in the form of a laser pointer 38 is securely seated within a recessed seat 40 on an external surface of the annular rotatory member 34. The laser 38 is positioned within the recessed seat 40 such that collimated laser light emitted therefrom is extends perpendicularly with respect to the longitudinal axis 42 of the tool body 26, and hence generally radially with respect to a rotational axis 44 of the rear bicycle wheel.
As is shown most clearly in Fig. 6, the longitudinal axis 42 of the tool body 26 extends generally perpendicularly with respect to the rotational axis 44 of the rear bicycle wheel. In order to achieve optimum gear shifting, the axes 42, 44 should preferably be in perfect parallel alignment.
In use, the external screw thread on the first end 28 of the tool body 26 is screwed into the internally threaded derailleur passage 18 of a bicycle derailleur hanger 10. As shown in both Figs. 6 and 7, the rotatory member 34 is spaced sufficiently from the first end 28 such that the light emitted from the laser 38 is not impeded by any bicycle components or accessories. An elongate scale 46 provided with distance graduations is attached to the rear bicycle wheel via its tyre valve stem which acts as a fixed reference point.
The alignment of the rear derailleur hanger 10 relative to the rear bicycle wheel can now be calculated at various circumferential positions. Typically, a minimum of two measurements (but preferably at least four) would he recorded at approximately equidistant positions around the wheel in the manner described below.
For example, with the bicycle wheel rotated such that its tyre valve stem is at the 9 o’clock position (i.e. proximate the end of the rear mudguard as shown in Fig. 8a) the rotatory member 34 is rotated until a laser spot 48 from light emitted from the laser 38 is incident on the scale 46. A first distance reading on the scale corresponding to the point at which the laser spot is incident thereon is physically or mentally recorded.
The bicycle wheel is then rotated such that its tyre valve stem is at the 3 o'clock position (i.e. proximate the bicycle chain as shown in Fig. 8b). Conveniently, the rotation of the bicycle wheel to this new position does not require any7 adjustment of the tool body 26, but it may be necessary to manually manoeuvre the scale 46 around the chain, seat stay and chain stay. Provided that the scale is formed from a resiliently flexible material, this can he achieved without physically detaching and re-attaching the scale 46 to the tyre valve stem.
The rotatory member 34 is then rotated by approximately 180 degrees until the laser spot 48 from the light emitted from the laser 38 is once again incident on the scale 46. A second distance reading on the scale corresponding to the point at which the laser spot is now incident is physically or mentally recorded.
If the first and second distance readings are identical (taking into account any acceptable tolerances) then the rear derailleur hanger 10 is in correct alignment across a first plane connecting the two tyre valve positions. As can be seen in Figs 8a and 8b, both distance readings are identical at 75mm. However, if the first and second distance readings differ (by more than any deemed acceptable tolerances) then adjustment is required to realign the rear derailleur hanger 10 across said first plane.
For example, if the first and second readings are 75mm and 85mm respectively, the average of those readings is calculated to be 80mm. With the bicycle tyre valve in its 3 o'clock position, the handle portion 32 of the second end 30 is grasped by a user to apply a gentle manual bending force perpendicularly with respect to the longitudinal axis 42 of the tool body 26 until the laser spot 48 is incident on the scale at the 80mm position.
Once the rear derailleur hanger 10 is aligned across said first plane, the aforementioned method steps are repeated with the bicycle tyre valve in the 12 o’clock and 6 o’clock positions, respectively. The rear derailleur hanger 10 is then also aligned across a second plane extending perpendicularly with respect to said first plane.
It will be appreciated that the derailleur hanger alignment tool 24 of the present invention provides numerous advantages to a bicycle user or technician. It is contemplated by the inventor that various substitutions, alterations, and modifications may be made to the invention without departing from the scope of the invention as defined by the accompanying statements of invention. For example, the illustrated rotatory member 34 could be dispensed with and replaced with a fixed laser 38 which selectively (or simultaneously) emits light in two or more predetermined radial directions. It would then be necessary to rotate the bicycle wheel until such time as the scale 46 is aligned with the relevant laser light path.
Claims (21)
1. A kit for aligning a rear derailleur hanger of a bicycle, the kit comprising a scale for measuring a distance relative to a bicycle wheel rim, and a rear derailleur hanger
5 alignment tool, wherein the rear derailleur hanger alignment tool comprises: an elongate tool body having first and second opposite ends; a locating member provided at said first end of the tool body for removable connection to a rear derailleur hanger; and an optical device for emitting light in a plurality of different directions extending
10 perpendicularly with respect to said longitudinal axis of the tool body; and wherein the emitted light is receivable on said scale.
2. A kit according to claim 1, wherein a rotatory member is coupled to the tool body between its said first and second opposite ends for rotation about the longitudinal axis of
OO 15 the tool body, and said optical device is coupled to the rotatory member.
3. A kit according to claim 1 or 2, wherein the scale is rim-mountable and provided with an opening facilitating its connection with a fixed point on the wheel rim.
20
4. A kit according to claim 3, wherein said fixed point is a bicycle wheel valve stem or a spoke nipple.
5. A kit according to claim 3 or 4, wherein the rim-mountable scale is provided with indicia along its length representative of distance from a wheel rim to which it is
25 connected.
6. A kit according to any preceding claim, wherein the optical device emits a collimated light beam.
A kit according to any preceding claim, wherein the optical device is a laser.
8. A kit according to claim 2, wherein the rotatory member is coupled to the tool body at a fixed longitudinal position along its length between its said first and second opposite ends.
5
9. A kit according to claim 8, wherein the rotatory member is capable of 360-degree rotation about the longitudinal axis of the tool body at said fixed longitudinal position.
10. A kit according to any preceding claim, wherein said second end of the tool body is provided with a manually graspable part for the application of force to effect adjustment
10 of a rear derailleur hanger.
11. A kit according to claim 10, wherein the manually graspable part is provided with a knurled, ribbed, or textured surface.
00 15
12. A kit according to any preceding claim, wherein the tool body is in the form of an elongate cylindrical rod.
13. A kit according to claim 2, wherein the rotatory member is in the form of an annulus.
14. A kit according to any of claims 8 to 13, wherein the tool body is provided with spaced apart circumferential grooves within which are provided resilient fasteners for engaging opposing sides of the annulus and retaining it in a predetermined longitudinal position on the tool body.
15. A kit according to claim 14, wherein the annulus is provided with a seat portion for seating said optical device in a fixed position thereon.
16. A kit according to any preceding claim, wherein the locating member is a threaded 30 stud receivable within a correspondingly threaded aperture of a rear derailleur hanger.
17. A rear derailleur hanger alignment tool comprising:
an elongate tool body having first and second opposite ends;
OO 15 δ
1 20 a locating member provided at said first end of the tool body for removable connection to a rear derailleur hanger; and an optical device for emitting light in a plurality of different directions extending perpendicularly with respect to sa id longitudinal axis of the tool body.
18. A rear derailleur hanger alignment tool according to claim 17, wherein a rotatory member is coupled to the tool body between its said first and second opposite ends for rotation about the longitudinal axis of the tool body, and said optical device is coupled to the rotatory member.
19. A method of aligning a rear derailleur hanger relative to a bicycle wheel rim using a kit according to any of claims 1 to 16, the method comprising:
mounting the scale onto, or against, the bicycle wheel rim; connecting the locating member to a rear derailleur hanger; activating the optical device;
directing the emitted iight against the scale;
recording a first position at which the emitted iight is incident on the scale when the bicycle wheel, is at a first, rotational position;
moving the bicycle wheel to a second rotational position;
recording a second position at which the emitted light is incident on the scale;
calculating the average of said first, and second positions; and applying force to a rear derailleur hanger via the tool body to correct any detected misalignment in a first plane.
25
20. A method of aligning a rear derailleur hanger according to claim 19, wherein the step of recording a second position is preceded by the step of rotating a rotatory member to which the optical device is attached about a longitudinal axis of the tool body.
21. A method of aligning a rear derailleur hanger according to claim 19 or 20, wherein 30 the step of moving the bicycle wheel rim is subsequently repeated at third and fourth positions lying intermediate said first and second positions; the average of said third and fourth positions are calculated; and a force is applied to a rear derailleur hanger via the tool body to correct any detected misalignment in a second plane.
Intellectual
Property
Office
Application No: GB1700810.3 Examiner: Mr Philip Osman
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1700810.3A GB2560296B (en) | 2017-01-17 | 2017-01-17 | Bicycle derailleur alignment tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1700810.3A GB2560296B (en) | 2017-01-17 | 2017-01-17 | Bicycle derailleur alignment tool |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB201700810D0 GB201700810D0 (en) | 2017-03-01 |
| GB2560296A true GB2560296A (en) | 2018-09-12 |
| GB2560296B GB2560296B (en) | 2021-06-02 |
Family
ID=58463369
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1700810.3A Expired - Fee Related GB2560296B (en) | 2017-01-17 | 2017-01-17 | Bicycle derailleur alignment tool |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2560296B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112158293A (en) * | 2020-09-11 | 2021-01-01 | 惠州市元胜自行车配件有限公司 | Rear speed-changing guide wheel position adjusting tool |
| US20230160679A1 (en) * | 2021-11-24 | 2023-05-25 | Jason C. QUADE | Rear derailleur and cassette pre-checking device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102017C (en) * | ||||
| US7467477B1 (en) * | 2007-07-26 | 2008-12-23 | Shimano Inc. | Rear derailleur hanger alignment tool |
| GB2516356A (en) * | 2013-06-23 | 2015-01-21 | Blat Ind Pty Ltd | A bicycle alignment device |
-
2017
- 2017-01-17 GB GB1700810.3A patent/GB2560296B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102017C (en) * | ||||
| US7467477B1 (en) * | 2007-07-26 | 2008-12-23 | Shimano Inc. | Rear derailleur hanger alignment tool |
| GB2516356A (en) * | 2013-06-23 | 2015-01-21 | Blat Ind Pty Ltd | A bicycle alignment device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112158293A (en) * | 2020-09-11 | 2021-01-01 | 惠州市元胜自行车配件有限公司 | Rear speed-changing guide wheel position adjusting tool |
| CN112158293B (en) * | 2020-09-11 | 2021-11-16 | 惠州市元胜自行车配件有限公司 | Rear speed-changing guide wheel position adjusting tool |
| US20230160679A1 (en) * | 2021-11-24 | 2023-05-25 | Jason C. QUADE | Rear derailleur and cassette pre-checking device |
| US11852471B2 (en) * | 2021-11-24 | 2023-12-26 | Abbey Bike Tools | Rear derailleur and cassette pre-checking device |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2560296B (en) | 2021-06-02 |
| GB201700810D0 (en) | 2017-03-01 |
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| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20220117 |