|Publication number||USRE42436 E1|
|Application number||US 12/017,391|
|Publication date||Jun 7, 2011|
|Filing date||Jan 22, 2008|
|Priority date||Sep 6, 2002|
|Also published as||US7066856, USRE44379, USRE45508|
|Publication number||017391, 12017391, US RE42436 E1, US RE42436E1, US-E1-RE42436, USRE42436 E1, USRE42436E1|
|Inventors||James K. Rogers|
|Original Assignee||Eko Sport, Inc.|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (85), Referenced by (7), Classifications (9), Legal Events (3)|
|External Links: USPTO, USPTO Assignment, Espacenet|
This is a reissue application of U.S. application Ser. No. 10/236,766, which issued as U.S. Pat. No. 7,066,856.
The present invention relates to a protector for chain rings on bicycles and the like. In particular, it includes a mounting bracket operably secured to the bottom bracket sleeve with a durable guard extending therefrom and detachably secured thereto.
Wheeled vehicles and especially in-line, two-wheeled vehicles such as bicycles, motorcycles, scooters, and the like, are popular forms of transportation, exercise, and sport. More recently, such vehicles are being used in particularly rugged environments including operating over unimproved roads and rough terrain, and for stunt riding over stairs and the like. For example, a form of bicycle commonly known as a mountain bike is specifically intended for off-road operation.
Most two-wheeled vehicles are propelled by a chain operably extending between two or more sprockets. One sprocket, commonly known as a chain ring, is driven by a power source such as a crank and pedal assembly. In bicycles, the chain ring is operably secured to a lower hub of the bicycle's frame which is commonly known as the lower bracket sleeve. The crank and pedal assembly usually have an axis of rotation centered along a centerline extending through the lower bracket sleeve.
Chain rings are usually planar disks with teeth along their outer diameter for engaging the chain. In order for the chain ring to operate effectively, it must remain substantially planar and the teeth must remain intact during operation of the vehicle. However, portions of most chain rings remain exposed and extend below the bicycle frame. Accordingly, chain rings are susceptible to bending and damage caused by inadvertent impact with objects.
This susceptibility is increased with off-road and stunt riding of the vehicle. For example, a rider of a mountain bicycle may frequently attempt to jump small objects such as rocks and fallen trees. If the rider executes a jump and in the process lands the bicycle such that a large rock straddles the front and rear wheels, the chain ring can impact the rock causing damage to the chain ring.
Attempts to protect the chain ring from inadvertent impacts have had limited success. For example, U.S. Pat. No. 5,320,583 to van Wingen born Looyen teaches securing a circular disk to the exterior planar surface of a chain ring such that the circular disk and chain ring are substantially parallel to each other and rotatable on the same axis or rotation. As a rider pedals, the chain ring and circular disk rotate about the axis of rotation. The circular disk contacts some objects approaching the chain ring first, thereby protecting the chain ring to a certain degree. However, since the circular disk is directly connected to the chain ring and drive shaft, any bending or damage of the circular disk caused by the impact will likely also bend the attached chain ring or drive shaft. Moreover, such circular disks offer negligible protection from impacts to the chain ring arising from contact with objects positioned toward the inside surface of the chain ring.
Inventors have also attempted to extend a chain ring protector directly from the bicycle's frame. For example, U.S. Pat. No. 5,067,930 to Morales teaches extending a trough-type protector from forward and aft struts mounted to the frame. The curved trough-type protector extends below the chain ring, thereby protecting it from inadvertent impact. A first clamp for securing the forward strut is positioned on a rail of the frame extending forward from the mounting bracket sleeve. A second clamp for securing the aft strut is positioned on rear wheel forks extending rearward from the mounting bracket sleeve. In an effort to allow the through-type protector to accommodate different bicycle designs, a swivel is provided between the first clamp and front strut.
Despite the benefits of the Morales design, it has several drawbacks. For example, a large amount of hardware, such as the first and second clamps, pivot structure, and struts, is required to support the protector, thereby increasing the expense of the structure and time required to mount and align it properly. Similarly, not all bicycles have the frame structure stemming from the mounting bracket sleeve as shown in Morales. Accordingly, the first and second clamps and orientation taught in Morales may not be operable when attempting to install the Morales protector on these different frame structures.
In addition, the length of the struts determines the size of the chain ring that may be used with it. Despite the limited adjustability provided by the swivel, if the struts are too short, a trough-type protector will not extend below the chain ring. Also, if the struts are too long, the trough-type protector can interfere with operation of the bicycle. In addition, under some impacts on the trough-type protector, the swivel structure can actually allow the trough-type protector to deflect into to the chain ring, thereby damaging it, or at least forcing the rider to stop to realign the protector.
Accordingly, despite the benefits of the known chain ring protectors, there remains a need for a simple, cost effective, easy to install and adjust, chain ring protector that can be operably secured to a large number of vehicles independent of a particular frame design, and that can effectively protect any sized chain ring operably installed on a vehicle without interfering with operation of the vehicle. In addition to other benefits that will become apparent in the following disclosure, the present invention fulfills these needs.
The present invention is a substantially planar mounting bracket operably secured to the bottom bracket sleeve of a vehicle with a durable guard extending therefrom. The durable guard has a substantially arcuate outer edge sized to approximate the outer diameter of a chain ring, and it is operably secured to the planar mounting bracket such that the outer edge extends slightly beyond the outer diameter of the chain ring in which it is protecting.
Preferably, the durable guard is detachably secured to the mounting bracket, and the mounting bracket includes a plurality of mounting portions thereon, thereby allowing a large variety of possible mounting configurations for the durable guard. More preferably, the guard includes parallelly aligned slots extending therethrough for operably engaging the mounting portions, thereby allowing the outer edge of the durable guard to be adjusted simply by sliding the durable guard along the slots toward or away from the bottom bracket sleeve.
Since the durable guard is detachably secured to the mounting bracket, the durable guard may be replaced easily if it becomes damaged or worn, or if a different sized durable guard is desired.
In an alternative embodiment, a second chain ring protector can be installed on the opposite side of the bottom bracket sleeve, and the two chain ring protectors can be operably secured together with a stabilizing bracket extending therebetween.
Additional objects and advantages of the present invention will be apparent from the detailed description of the preferred embodiment thereof, which proceeds with reference to the accompanying drawings.
A simple, cost effective, easy to install and adjust, chain ring protector 10 operably secured to the lower bracket sleeve 12 of a vehicle, such as a bicycle 14, is shown in
Preferably, the housing 30 includes the reverse threads 34 toward one end 36 with a lip 38 adjacent to those threads 34. More preferably, the housing 30 also includes a recess 40 and spaced-apart notches 42 to allow a mating wrench portion (not shown) to be detachably secured thereto. According, the mating wrench portion may be used to tighten and loosen the lower bracket spindle 26 to the lower bracket sleeve 12.
Left and right cranks 44, 46, respectively, are operably secured to the ends 48a, 48b of the lower bracket spindle shaft 28 with a pivoting pedal 50 secured at the opposite ends of each crank 44, 46. At least one sprocket having teeth 52 extending radially therefrom is secured to the lower bracket spindle and positioned on one side of the lower bracket sleeve 12. This sprocket is also commonly known as a chain ring 54. Usually, the chain ring 54 is also secured to one of the cranks 44, 46.
A continuous loop chain (not shown) encircles the chain ring 54 and operably engages the teeth 52 of the chain ring 54. The chain also engages a second sprocket (not shown) operably secured to one of the front and rear wheels of the bicycle 14. Accordingly, when an operator pedals the bicycle by alternatingly urging the left and right cranks 44, 46, respectively, to spin the shaft 28, the chain ring 54 urges the chain to spin one of the wheels of the bicycle.
As best shown in
The mounting bracket 60 includes a plurality of guard mounting holes 70a-i thereon. Preferably, the mounting bracket 60 has two arms 72, 74 extending from the central bracket mounting hole 64 and a substantially circular outer edge 76 extending from the central bracket mounting hole 64 opposite the arms 72, 74 as best shown in
The guard 62 has a substantially planar mounting portion 80 with an opening 82 to prevent it from interfering with the lower bracket spindle 26. A substantially arcuate outer edge 84 extends radially from the opening 82 as best shown in
Connectors 90 extend through each aligned mounting hole and slot combination. Preferably, each connector includes a screw 92 being operably received into an internally threaded shaft 94 with a resilient washer 96 operably engaging the guard 62 and a lock washer 98 holding the screw 92 in place. More preferably, the internally threaded shaft 94 has a tapered head 100 and is recessed within the guard mounting hole (70a shown in
Preferably, the mounting slots 86a-c are aligned to allow the substantially arcuate outer edge 84 to move toward or away from the lower bracket spindle 26 when the guard 62 is mounted to the mounting bracket 60. As shown in
The guard 62 and mounting bracket 60 are constructed of durable, impact resistant materials. One known preferred guard material is Ultra-High Molecular Weight polyethylene or plastic, which is commonly known in the materials industry as “UHMW.” One known acceptable mounting bracket material is aluminum, and more preferably a type of aluminum known as “6061 Aluminum.”
As shown in
It can be appreciated that a plurality of chain rings 54a-c (
When the chain ring protector 10 is installed on the bicycle 14, the chain ring 54 is protected from inadvertent impacts with an object 11. The mounting bracket also assists with preventing the chain from inadvertently falling off the chain ring. Moreover, the chain ring protector 10 is operably secured directly to the lower bracket sleeve 12, one of the strongest elements of the frame 16. In addition, no portion of the chain ring protector 10 contacts or otherwise engages the chain ring 54 so it will not likely also damage the chain ring 54 in the process of protecting it. Accordingly, should the chain ring protector 10 become damaged during use, it can be easily replaced without removing the mounting bracket 60 from the lower bracket sleeve 12. Since the chain ring protector is secured primarily in place on the lower bracket sleeve using a conventional lower bracket spindle, which is already needed to enable operation of the bicycle, the need for additional mounting hardware beyond the mounting bracket is greatly reduced over the structure disclosed in U.S. Pat. No. 5,067,930 to Morales.
In view of the wide variety of embodiments to which the principles of the invention can be applied, it should be apparent that the detailed embodiments are illustrative only and should not be taken as limiting the scope of the invention. For example, and as best shown in
Accordingly, the claimed invention includes all such modifications as may come within the scope of the following claims and equivalents thereto.
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US968304 *||Feb 24, 1910||Aug 23, 1910||George H Winslow||Pulley-guard.|
|US1325206||Jun 15, 1918||Dec 16, 1919||Driving-gear casing eor bicycles|
|US1400131||Feb 5, 1921||Dec 13, 1921||Howard A Jones||Sprocket-guard attachment for bicycles|
|US1636327||May 12, 1926||Jul 19, 1927||Colson Company||Cycle|
|US3184993||Dec 11, 1963||May 25, 1965||Carl A Swenson||Derailleur guard|
|US3416385||Mar 20, 1967||Dec 17, 1968||Case Co J I||Sprocket assembly|
|US3477303 *||Nov 28, 1967||Nov 11, 1969||Schwinn Bicycle Co||Double plateau sprocket assembly|
|US3785219||Jun 5, 1972||Jan 15, 1974||J Anthamatten||Coaster brake system for a multi-speed bicycle|
|US3815439 *||Oct 20, 1972||Jun 11, 1974||Shimano Industrial Co||Multi-speed transmission front gear system|
|US3835729||Nov 24, 1972||Sep 17, 1974||Shimano Industrial Co||Means for preventing driving chain from coming off multi-speed transmission front gear for bicycle|
|US3869138||Jul 1, 1974||Mar 4, 1975||Ford Motor Co||Steering device having a chain operated steering gear actuator|
|US3910136||Apr 11, 1974||Oct 7, 1975||Lucien Charles Hippolyte Juy||Protection apparatus for a speed change mechanism of a bicycle or similar vehicle|
|US3973447||May 28, 1975||Aug 10, 1976||Shimano Industrial Company, Limited||Derailleur for a bicycle|
|US4044621||Jun 9, 1975||Aug 30, 1977||Mcgregor Sr John C||Sprocket structure and chain guard|
|US4078444||Feb 8, 1977||Mar 14, 1978||Jacques Andre Huret||Front derailleur chain guide|
|US4106357||Dec 16, 1976||Aug 15, 1978||Shimano Industrial Company Limited||Multistage gear crank for a bicycle|
|US4135727||Nov 5, 1976||Jan 23, 1979||Tullio Campagnolo||Mounting of the transmission chain of bicycles|
|US4237743||Oct 2, 1978||Dec 9, 1980||Shimano Industrial Company, Limited||Front derailleur for a bicycle|
|US4240303 *||Sep 27, 1978||Dec 23, 1980||Mosley Earnest D||Chain sprocket with opposite frangible side guide plates|
|US4330137||Jul 22, 1980||May 18, 1982||Shimano Industrial Company Limited||Front derailleur for a bicycle|
|US4337933||Apr 9, 1980||Jul 6, 1982||Shimano Industrial Company Limited||Jig for mounting a front derailleur in a bicycle|
|US4380445 *||Aug 4, 1975||Apr 19, 1983||Shimano Industrial Company Limited||Transmission for a bicycle|
|US4433963||Dec 22, 1980||Feb 28, 1984||Shimano Industrial Company Limited||Chain guide for a derailleur for a bicycle|
|US4439172||Mar 31, 1981||Mar 27, 1984||Shimano Industrial Company Limited||Chain gear and crank mounting assembly|
|US4475894||May 7, 1982||Oct 9, 1984||Sugino Cycle Industries, Ltd.||Front sprocket wheel having chain guard for bicycles|
|US4487424 *||Jan 21, 1983||Dec 11, 1984||Ellis William L||Bicycle sprocket shield|
|US4498890||Dec 20, 1982||Feb 12, 1985||General Electric Company||Fixed track chain drive|
|US4507105||Dec 9, 1982||Mar 26, 1985||Huffy Corporation||Bicycle chainguard|
|US4515386||Aug 10, 1983||May 7, 1985||Kanji Tsujimura||Guard for chain wheel|
|US4573950||Jun 20, 1984||Mar 4, 1986||Shimano Industrial Company Limited||Chain guide in a front derailleur|
|US4632416||Jul 24, 1985||Dec 30, 1986||Zelenetz Scott H||Flexible protective cover for the drive train elements of a bicycle|
|US4639240||Nov 14, 1985||Jan 27, 1987||Schwinn Bicycle Company||Chainguard|
|US4662862||Jan 22, 1986||May 5, 1987||Les Matson||Tensioning device for flexible drive element|
|US4832667||Aug 6, 1987||May 23, 1989||Wren Nicholas D||Front chain wheel chain guide|
|US4854924||Oct 17, 1988||Aug 8, 1989||Shimano Industrial Company Limited||Cover device for a driving chain for a bicycle|
|US4905541||Sep 29, 1988||Mar 6, 1990||Huffy Corporation||Derailleur guard|
|US5002520||Dec 14, 1989||Mar 26, 1991||Greenlaw John W||Bicycle drive chain guide|
|US5003840 *||Nov 6, 1989||Apr 2, 1991||Huffy Corporation||Cover for the driving sprocket of a bicycle|
|US5018564||Mar 26, 1990||May 28, 1991||Anglin Gregory V||Fabric protective cover for a drive mechanism of a bicycle|
|US5067930||Dec 20, 1990||Nov 26, 1991||Robert Morales||Bicycle sprocket protector|
|US5134901 *||Aug 15, 1990||Aug 4, 1992||Odin Foam Company||Interconnect casing and power divider employing the casing|
|US5320582||Nov 30, 1992||Jun 14, 1994||Nec Corporation||Chain driving unit|
|US5320583 *||Jan 17, 1992||Jun 14, 1994||De Woerd B.V.||Protector for front chain sprocket of a bicycle|
|US5326331||Aug 26, 1993||Jul 5, 1994||Hallock Iii Orrin S||Chain, hub, spoke and derailleur guard|
|US5460576||Oct 7, 1993||Oct 24, 1995||Barnett; Robert L.||Bicycle chain guide|
|US5496222||Nov 14, 1994||Mar 5, 1996||Shimano, Inc.||Front derailleur for a bicycle|
|US5540118||May 9, 1994||Jul 30, 1996||Calendrille, Jr.; John L.||Flexible bicycle derailleur cover for protection against contaminants such as mud|
|US5620384||Nov 29, 1995||Apr 15, 1997||Shimano, Inc.||Front derailleur for a bicycle|
|US5676616||Mar 6, 1996||Oct 14, 1997||Shimano, Inc.||Protective cover for a bicycle derailleur|
|US5679084||May 6, 1996||Oct 21, 1997||Daniels, Iii; Vernon James||Motorcycle roller chain guide|
|US5725450||Aug 21, 1996||Mar 10, 1998||Joshua Paris||Device for preventing derailment of a bicycle chain|
|US5728018||Nov 17, 1995||Mar 17, 1998||Shimano, Inc.||Method and apparatus for positioning a bicycle derailleur chain guide|
|US5782714||Jan 27, 1997||Jul 21, 1998||Evergreen Innovations, L.L.C.||Bicycle chain guide|
|US5846148||Aug 19, 1997||Dec 8, 1998||Shimano, Inc.||Bicycle front derailleur|
|US6039665||Mar 3, 1999||Mar 21, 2000||Shimano, Inc.||Multiple sprocket assembly for a bicycle|
|US6083132||May 4, 1998||Jul 4, 2000||Moxee Innovations Corporation||Free floating belt idler|
|US6117032||Feb 13, 1998||Sep 12, 2000||Shimano, Inc.||Protective plate for bicycle chain|
|US6165092||Sep 18, 1997||Dec 26, 2000||Bramham; Benjamin||Guide assembly for a bicycle|
|US6203459||Jun 3, 1999||Mar 20, 2001||John L. Calendrille, Jr.||Bicycle derailleur system with integral flexible seal to protect moving parts from contaminants|
|US6332853||Mar 16, 2000||Dec 25, 2001||Melinda K. Bowman||Removable cover for bicycle chain and derailleurs|
|US6354973 *||Nov 16, 1999||Mar 12, 2002||Robert L. Barnett||Chain guide apparatus for bicycle|
|US6416434||Mar 14, 2001||Jul 9, 2002||John L. Calendrille, Jr.||Bicycle derailleur having cable connected to upper link arm without substantial bending|
|US6533690||Apr 30, 2001||Mar 18, 2003||Robert L. Barnett||Chain guide apparatus for bicycle|
|US6988427||Nov 23, 2001||Jan 24, 2006||Shimano, Inc.||Seal assembly for a bicycle bottom bracket|
|US7059983||Mar 20, 2003||Jun 13, 2006||Jon Heim||Multiple sprocket, multiple function chain guide|
|US7066856||Sep 6, 2002||Jun 27, 2006||Rogers James K||Chain ring protector|
|US7066857||Nov 4, 2003||Jun 27, 2006||Derosa Umberto||Rear derailleur guard|
|US20020160869||Apr 30, 2001||Oct 31, 2002||Barnett Robert L.||Chain guide apparatus for bicycle|
|US20040009835||Mar 20, 2003||Jan 15, 2004||Jon Heim||Multiple sprocket, multiple function chain guide|
|US20040254038||Jun 11, 2003||Dec 16, 2004||Chamberlain Jason L.||Bicycle rear derailleur guard|
|USD208683 *||Mar 1, 1967||Sep 19, 1967||Bicycle chain guard|
|USD298613||Feb 24, 1986||Nov 22, 1988||Wald Manufacturing Co., Inc.||Bicycle chain guard|
|USD323309||Feb 17, 1989||Jan 21, 1992||Bicycle freewheel gear cover|
|USD355872 *||Dec 29, 1993||Feb 28, 1995||Huffy Corporation||Bicycle chainguard|
|DE2058799A1||Nov 30, 1970||Jul 15, 1971||Geb Van Der Woerd Will Looijen||Kettengehaeuse fuer Fahrrad od.dgl.|
|DE3417336A1||May 10, 1984||Nov 14, 1985||Hubert Hauke||Slipping element|
|DE3421210A1 *||Jun 7, 1984||Dec 13, 1984||Woerd Bv||Bicycle chain guard made of plastic|
|DE3537615A1 *||Oct 23, 1985||Apr 23, 1987||Hemmelskamp Fa H||Chain guard made of plastic|
|DE4126156A1||Aug 7, 1991||Mar 5, 1992||Martin Eder||Bicycle chain guard - is fixed concentrically around pedal sprocket bearing and covers sprocket side|
|DK96297C||Title not available|
|EP1288119A2 *||Aug 26, 2002||Mar 5, 2003||RIXEN & KAUL GmbH||Crank arm for bicycle|
|JPH1120764A *||Title not available|
|NL7800724A||Title not available|
|NL9300333A *||Title not available|
|SU1199696A1||Title not available|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US8820853||Mar 25, 2011||Sep 2, 2014||Eko Sport, Inc.||Wheel axle assembly|
|US8961342 *||Aug 26, 2011||Feb 24, 2015||Shimano Inc.||Chain guide assembly with movable member|
|US9199689||Jul 21, 2014||Dec 1, 2015||Eko Sport, Inc.||Wheel axle assembly|
|US9327786 *||Aug 15, 2013||May 3, 2016||Eko Sport, Inc.||Chain guard with unitary bracket extension|
|US20110230287 *||Mar 22, 2010||Sep 22, 2011||Joseph Savola||Chain lateral travel limiter|
|US20130053196 *||Aug 26, 2011||Feb 28, 2013||Shimano, Inc.||Chain guide assembly with movable member|
|US20150353155 *||Feb 26, 2014||Dec 10, 2015||Miranda & Irmao, Lda.||Sprocket cover|
|International Classification||B62K19/44, B62J23/00|
|Cooperative Classification||B62K19/44, B62J13/00, B62J23/00, B62J15/02|
|European Classification||B62J23/00, B62K19/44|
|Jul 19, 2011||RF||Reissue application filed|
Effective date: 20110606
|Jun 17, 2014||CC||Certificate of correction|
|Sep 23, 2014||CC||Certificate of correction|