IMPROVED BICYCLE CHAIN LUBRICATION

Abstract: A means for cleaning and lubricating a bicycle chain (1), while riding, comprises a water reservoir (2) and a lubricant reservoir (9) and means for transporting the lubricant and water to an injecting means (4) for injecting said fluids onto the chain (1). Means are provided for enabling the water to be added to further cleansing agents in a dispenser (3) before being gravitated to the injecting means (4). Similarly, a pump (10) is provided for forcing a controlled quantity of lubricant to the injecting means (4).

Description: "Improved Bjcycle c ain k ifrrica Qn" This invention relates to the lubricating and cleaning of chains, such as are found on bicycles. The invention particularly relates to a means of enabling cleaning and lubrication of a gear chain while riding a bicycle. In the past a coating of water-proof oil or grease has protected bicycle chains from wear and corrosion. However, road dirt tends to adhere to the oil and the combination of the dirt and oil forms a grinding paste which increases the friction of the chain and accelerates wear thereof. To prevent this from happening it is necessary to clean the chain often which, until now, requires the chain to be removed from the sprockets and immersed in a bath of oil-solvent. This is a tedious and filthy task, often leading to staining of the cleaner's hands and/or clothing. This invention obviates, or at least mitigates, the above by enabling the chain on a bicycle to be cleaned and lubricated while riding. According to the invention there is provided a means for cleaning a chain comprising a water reservoir, water dispensing means and injecting means, wherein water supplied from said water reservoir to said water dispenser is communicated to said injecting means through at least one connecting tube whereupon it is injected onto the chain. reservoir, a lubricant reservoir, water dispensing means, a pump and an injecting means, wherein a cleansing fluid may flow from the water dispenser to the injecting means by a first connecting tube and said lubricant may be pumped from said lubricant reservoir to said injecting means through a second connecting tube, and wherein said injecting means is adapted to inject said cleansing fluid and said lubricant onto the chain. Preferably, the water reservoir comprises a plastic drinking bottle. Preferably, said water dispenser comprises a compartment having a large mouth for receiving water from said water supply. Preferably, said water dispenser also includes a filter and a lid means for preventing dirt, dust or the like from entering therein. Preferably, said water dispenser is adapted to contain a tablet of detergent, said tablet being water soluble. Preferably, said injecting means comprises an injector plate which is mounted coaxially with and with minimal clearance to a lower derailleur guide wheel of the bicycle transmission, and wherein radial grooves are provided in the guide wheel so as to direct fluid dispensed into the injector towards the link pin bearings of the chain. Preferably, the injector comprises a saucer shaped fixed cheek-plate, having one aperture means for receiving said connecting tubes. Preferably, the lubricant reservoir comprises a re-fillable fluid container. Preferably, the lubricant reservoir is transparent to enable the quantity of lubricant therein to be checked visually. Preferably, the lubricant is a water soluble oil. Preferably, the lubricant reservoir comprises venting means such that air pressure is used to resist spillage of the lubricant when the bicycle is inverted. Alternatively, the lubricant reservoir has flexible walls which collapse as lubricant is pumped out of the lubricant reservoir. Preferably, said pump comprises a self inflating bulb having a non-return inlet valve through which the lubricant is received from the reservoir and a pressure release outlet valve through which the lubricant is communicated to the injector. Preferably, sa d control means ncludes a screw hav ng a tapered end, wherein the position of said taper may be adjusted to restrict the flow between said lubricant reservoir and said pump. Preferably, said control means may be used to prevent any flow of lubricant from said reservoir to said pump to prevent undesirable passage of lubricant. Preferably, said pump is incorporated into a handle bar grip of the bicycle. Preferably, said pump action of said lubricant is automatic as a rider of the bicycle varies his grip on the handle bars. Alternatively, said pump is located in only a relatively small area of handle bar grip so that a pumping action is performed only when positively intended. Alternatively, the pump is integral with the bicycle frame or saddle. Preferably, said lubricant reservoir is provided with a filling valve for filling said reservoir with said lubricant. An embodiment of the invention will now be described, by way of example only, with reference to the accompanying drawings, in which: Fig. 1 is an elevation of the invention mounted on a bicycle, Fig. 2 is an end view of the injecting means, Fig. 3 is a side view of a guide wheel in accordance with the invention, Fig. 4 is a plan view of an embodiment of the lubricant reservoir and pump, Fig. 5 is a plan view showing part of a lubricant reservoir including the filling valve, Fig. 6 shows an embodiment of said outlet valve, and Fig. 7 is a pictorial view of a water reservoir and dispenser. Referring firstly to Fig. 1, a means for cleaning and lubricating a sprocket chain 1 having link pin bearings comprises a water reservoir 2 and a water dispenser 3. The water reservoir 2 preferably comprises a drinking bottle such as is already commonly provided with bicycles. The water dispenser 3 comprises an easily filled compartment which may be fixed to or integral with a bicycle. The dispenser 3, as shown in Fig. 1, includes a filter and a lid which together serve to forbid contamination of the water by dirt or dust or the like. The dispenser 3 preferably comprises a wide mouth with a tapered throat to enhance ease of filling and the prevention of air locks. maintained at a minimal clearance, such as between one and three millimetres. The lower derailleur guide wheel 7 is provided with a plurality of grooves 8 which extend radially from the centre of the wheel 7 towards the positions on the wheel 7 at which the link pin bearings of the chain 1 are located. The water dispenser 3 is positioned above the injector plate 6 such that a pressure head is created which causes water or cleansing fluid in the dispenser 3 to pass through the connecting tube 5 into the injecting means 4. Detergent tablets or other cleansing additives may be added to the dispenser 3 to enhance the clearing properties of the fluid. Means are also provided for injecting a lubricant onto the chain 2. Lubricant is stored in an oil or lubricant reservoir 9 which communicates with an on-line pump 10 via a second connecting tube 11. With the aid of the pump 10 the lubricant may be forced from the lubricant reservoir 9 to the injecting means 4, through the second connecting tube 11. The second connecting tube 11 is inserted through a respective aperture 12 in the injector plate 6, thereby enabling the lubricant to be injected onto the chain 1 by the same means as the cleansing fluid. The pump 10, by way of example only, may include a self inflating bulb which when squeezed causes the pressure head of the lubricant to rise. A non-return inlet valve 13 is provided on the inlet side of the pump 10 and a pressure release outlet valve 14 is provided on the outlet side of the pump 10. When the pressure head of the lubricant is sufficiently raised, the lubricant travels through the connecting tube 11 into the injecting means 4. The outlet valve 14 also serves to capillary lock the lubricant in the connecting delivery tube 11. The pump 10 may be located in any number of different positions on a bicycle, as also is true of the reservoirs 2, 9 and dispenser 3. They also may be added to or integral with the bicycle's frame. In a preferred embodiment the lubricant reservoir 9 and pump 10 are incorporated into the handle bar grip. Alternatively, they may be provided in the saddle with the option of actuation by the rider's weight. The lubricant is preferably water-soluble, having high film strength and rust-inhibiting properties. At least two possible embodiments of the lubricant reservoir 9 are envisaged in the invention. Firstly, a closed re-fillable container may be used which, if not hidden internally in the frame, saddle or handle bars, should be transparent to enable a person to check the level of lubricant remaining. The container may have a breather or venting means arranged to cause air pressure to resist spillage of the lubricant when the bicycle is upside down. Alternatively, the lubricant reservoir 9 may be provided with flexible walls which collapse as lubricant is pumped out of the reservoir. In use, a person riding a bicycle comprising the invention pours or otherwise feeds water from the water reservoir 2, such as a drinking bottle, into the water dispenser 3. At this point the water may be added to other cleansing agents before being syphoned through the first connecting tube 5 into the space between the injector plate 6 and derailleur guide wheel 7. As the derailleur guide wheel 7 is rotated by pedalling, the resulting centrifugal forces causes the cleansing fluid to generate outward along the grooves 8 until it is deposited onto the link-pin bearings of the chain 1. Once the user is satisfied that the chain 1 has been sufficiently cleaned, he/she may then proceed to lubricate the chain 1 by squeezing the pump 10 thereby causing lubricant to leave the lubricant reservoir 9 and flow through the second connecting tube 11 into the injecting means 4. The volume of lubricant displaced by one pump action is only the quantity of lubricant required to lubricate the chain 1 so as to reduce wastage and spillage. Once the lubricant enters the injecting means 4 it is injected onto the chain 1 under the influence of the centrifugal force in a similar manner to the cleansing fluid. It is envisaged in the invention that while there is minimal spillage or "fly-off" of cleansing or lubricating fluid, a deflector or guard may be provided to catch any spray of fluid given off by the rotating chain. Many bicycles are already provided with a chain guard and so this idea may be simply adapted. The invention may also be adapted for use on bicycles having transmissions other than derailleur type transmissions. In this case, the injecting means would be adapted to ensure that the cleansing and lubricating fluids were still deposited on the chain, as required. Modifications and improvements may be made without departing from the scope of this invention.

Claims: Claims 1. A means for cleaning a chain comprising a water reservoir, water dispensing means and injecting means, wherein water supplied from said water reservoir to said water dispenser is communicated to said injecting means through at least one connecting tube whereupon it is injected onto the chain. 2. A means for lubricating a chain comprising a lubricant reservoir, an injecting means and a pump for pumping a lubricant stored in said lubricant reservoir into the injecting means, said injecting means being adapted to inject said lubricant onto the chain. 3. A means for cleaning and lubricating a chain comprising a water reservoir, a lubricant reservoir, water dispensing means, a pump and an injecting means, wherein a cleansing fluid may flow from the water dispenser to the injecting means by a first connecting tube and said lubricant may be pumped from said lubricant reservoir to said injecting means through a second connecting tube, and wherein said injecting means is adapted to inject said cleansing fluid and said lubricant onto the chain. 4. A means as claimed in Claim 1 or 3, wherein the water reservoir comprises a plastic drinking bottle. 5. A means as claimed in Claim 1, 3 or 4, wherein said water dispenser comprises a compartment having a large mouth for receiving water from said water supply. 6. A means as claimed in Claim 1 or any one of Claims 3 to 5, wherein said water dispenser also includes a filter and a lid means for preventing dirt, dust or the like from entering therein. 7. A means as claimed in Claim 1 or any one of Claims 3 to 6, wherein said water dispenser is adapted to contain a tablet of detergent, said tablet being water soluble. 8. A means as claimed in any one of the preceding Claims, wherein said injecting means comprises an injector plate which is mounted coaxially with and with minimal clearance to a lower derailleur guide wheel of the bicycle transmission, and wherein radial grooves are provided in the guide wheel so as to direct fluid dispensed into the injector towards the link pin bearings of the chain. 9. A means as claimed in any one of the preceding Claims, wherein the injector comprises a saucer shaped fixed cheek-plate, having one aperture means for receiving said connecting tubes. 10. A means as claimed in Claim 2 or 3 or Claim 8 or 9, wherein the lubricant reservoir comprises a re-fillable fluid container. 11. A means as claimed in Claim 2 or 3 or any one of Claims 8 to 10, wherein the lubricant reservoir is transparent to enable the quantity of lubricant therein to be checked visually. 12. A means as claimed in Claim 2 or 3 or any one of Claims 8 to 11, wherein the lubricant is a water soluble oil. 13. A means as claimed in Claim 2 or 3 or any one of Claims 8 to 12, wherein the lubricant reservoir comprises venting means such that air pressure is used to resist spillage of the lubricant when the bicycle is inverted. 14. A means as claimed in Claim 2 or 3 or any one of Claims 8 to 12, wherein the lubricant reservoir has flexible walls which collapse as lubricant is pumped out of the lubricant reservoir. 15. A means as claimed in Claim 2 or 3 or any one of Claims 8 to 14, wherein said pump comprises a self inflating bulb having a non-return inlet valve through which the lubricant is received from the reservoir and a pressure release outlet valve through which the lubricant is communicated to the injector. 16. A means as claimed in Claim 15, wherein said outlet valve provides capillary means to lock the lubricant in said second connecting tube provided between the pump and the injector. 17. A means as claimed in Claim 2 or 3 or any one of Claims 8 to 16, wherein said pump comprises a self inflating tube made from silicon. 18. A means as claimed in Claim 2 or 3 or any one of Claims 8 to 17, wherein said pump also comprises a variable control means for controlling the volume of lubricant pumped by a single pumping action of said pump. 19. A means as claimed in Claim 18, wherein said control means includes a screw having a tapered end. wherein the position of said taper may be adjusted to restrict the flow between said lubricant reservoir and said pump. 20. A means as claimed in Claim 18 or 19, wherein said control means may be used to prevent any flow of lubricant from said reservoir to said pump to prevent undesirable passage of lubricant. 21. A means as claimed in Claim 2 or 3 or any one of Claims 8 to 20, wherein said pump is incorporated into a handle bar grip of the bicycle. 22. A means as claimed in Claim 21, wherein actuation of said pump is automatic as a rider of the bicycle varies his grip on the handle bars. 23. A means as claimed in Claim 21, wherein said pump is located in only a relatively small area of the handle bar grip so that a pumping action is performed only when positively intended. 24. A means as claimed in Claim 2 or 3 or any one of Claims 8 to 20, wherein the pump is integral with the bicycle frame or saddle. 25. A means as claimed in Claim 2 or 3 or any one of Claims 8 to 24, wherein said lubricant reservoir is provided with a filling valve for filling said reservoir with said lubricant. 26. A means substantially as herein described with reference to and as illustrated in the drawings.

Inventors: SCOTT FRASER MATHESON, SCOTT, FRASER, MATHESON
Applicants: SCOTT FRASER MATHESON, SCOTT, FRASER, MATHESON
Application year: 1991
Main classification: B62J31
IPC codes: B62J31, B62M9