SRAM Deutschland GmbH Patent applications |
Patent application number | Title | Published |
20160101825 | MULTI-SPROCKET ARRANGEMENT FOR A BICYCLE - A multi-sprocket arrangement for a rear wheel hub of a bicycle may have improved gearshift characteristics, reduced vibrations during skewed running, and improved wear characteristics. The multi-sprocket arrangement includes a multiplicity of sprockets of different diameters, wherein at least one of the sprockets has a multiplicity of teeth. Also on the circumference of said sprocket, as viewed in a circumferential direction, at least one sequence of teeth is provided in which, with regard to their material thickness, a thin tooth is followed by a thick tooth which is followed in turn by another thin tooth. The sprocket has an impression and/or a passage recess which form at least one gearshift path and permit a shift between two adjacent sprockets. | 04-14-2016 |
20150274256 | Device for shifting the chain on a front chain wheel for a bicycle - A shifting assembly for shifting a roller chain between a plurality of front chain wheels for a bicycle that includes a smaller chain wheel, a larger chain wheel and a chain derailleur having a channel on an inner guide plate. The channel has an elevation that comes into contact with a chain rise rivet on the larger chain wheel in the state of starting to shift the roller chain from the smaller chain wheel to the adjacent larger chain wheel, viewed in a direction parallel to the axis of rotation of the chain wheels. | 10-01-2015 |
20140179474 | Sprocket Assembly - The invention relates to a sprocket assembly for mounting on a driver of a rear wheel hub of a bicycle. By means of a threaded element, a sprocket cluster and a separately embodied ring element are axially clamped together, and a rotation-coupling device is provided between the sprocket cluster and the ring element. Knurled teeth features on the threaded element and ring element prevent the loosening of the threaded element. Through the separate embodiment of the ring element and sprocket cluster, the respective most suitable manufacturing methods can be used for the two parts and, in the event that the sprocket cluster is manufactured by means of machining methods, the knurled features on the ring element can also be produced in a cost-effective and precise manner through shaping methods. | 06-26-2014 |
20140162821 | Jockey Wheel for a Rear Derailleur in a Bicycle Gear System and Rear Derailleur with such a Jockey Wheel - The invention relates to a guide wheel for a rear derailleur in a bicycle gear system for guiding a chain, including an annular wheel body with a central opening for rotatable bearing about a rotational axis of the guide wheel. The guide wheel includes a plurality of radially projecting teeth that are arranged on an outer circumferential surface of the wheel body. A tooth gap is arranged between each adjacent pair of teeth, individual teeth in the area of a root circle of the gear teeth having a predetermined tooth width matched to the chain. For improving the guiding properties, it is provided that the guide wheel has on at least some of the tooth gaps in the area near a tooth gap base and/or on at least some of the teeth at least one guide segment with a greater width than the tooth width of at least one of the adjacent teeth. | 06-12-2014 |
20140128191 | Drive arrangement for a bicycle, having a greater difference in the number of teeth between the largest and the smallest rear chain sprocket - A drive arrangement for a bicycle including a chainring having a chainring axis, a plurality of different rear sprockets, the plurality of rear sprockets sharing a sprocket axis, a drive chain that runs around the rear sprockets and the chainring and in meshing engagement with a selected active sprocket of the plurality of rear sprockets and the chainring, and a rear derailleur. The rear derailleur is configured to shift the chain over a plurality of sprockets having a difference in tooth count of over 25 teeth ranging from a smallest to a largest sprocket. | 05-08-2014 |
20140110208 | Freewheel Hub for a Bicycle - The invention relates to a freewheel hub for a bicycle including an axle and housing rotatably mounted thereon. A sprocket arrangement is mounted on the hub axle and a freewheel is arranged between the hub and the sprocket arrangement. The freewheel has a first coupling ring which couples to the hub and a second coupling ring which couples to the sprocket arrangement. The first and second coupling rings have respective tooth systems facing one another which are arrangeable into and out of mutual torque-transmitting engagement. | 04-24-2014 |
20130316863 | LOW-NOISE SPROCKET - A bicycle chainwheel assembly includes at least one smaller chainwheel and at least one larger chainwheel, the chainwheels engageable by a chain. The larger chainwheel includes a first tooth and a second tooth disposed adjacent the first tooth opposite a drive rotation direction. The first tooth and the second tooth have a configuration that improves the shifting of a chain from a smaller chainwheel to the larger chainwheel. The first tooth has a lateral recess and the second tooth has a deflection chamfer. The second tooth may also have a recess. The first and second teeth have a configuration that prevents the first and second teeth from capturing the chain. An inner link plate of the chain includes a chamfer disposed on an outer side surface in a central region of the plate. | 11-28-2013 |
20130190128 | Bicycle Transmission, Particularly in Form of a Multi-speed Gear Hub - The invention relates to a drive pawl within a bicycle transmission, wherein at least one torque transmission path extends from an input side to an output side across the same, and that has allocated thereto, relative to a first component supporting said pawl, a rotatable ring part, which interacts with the pawl for the alternate activation and deactivation of the pawl. | 07-25-2013 |
20130174688 | Bicycle Shifter - A shifter designed to actuate a gear change device of a bicycle by pulling and releasing a control cable. The shifter includes a base plate mountable to the bicycle, a cable spool and cable-pull and cable-release lever assemblies. The cable spool is rotated in a cable-pull direction to wind the control cable thereon and in a cable-release direction to unwind the control cable therefrom. The cable-pull and cable-release lever assemblies are operatively connected to the cable spool to rotate the cable spool in the cable-pull and cable-release directions, respectively. The cable-pull lever assembly includes a cable-pull lever rotated about a first axis and at least two winding pawls received by and rotating with the cable-pull lever about the first axis to transmit rotational movement of the cable-pull lever to the cable spool. | 07-11-2013 |
20130130853 | Rear derailleur device for a bicycle shifting system - A derailleur device, particularly a rear derailleur, includes at least one locking device for locking a chain guide at least in one locking position that is different from the starting position in relation to a movable element, and it is provided therein that the locking device includes a locking element displaceable between a passive position, in which the chain guide is released in relation to the movable element, and at least one active position, in which the chain guide is held in the at least one locking position. | 05-23-2013 |
20130098188 | ROTATABLE GRIP ACTUATOR - The invention relates to a bicycle twist-grip shifter, which is connectable to a fixed handgrip and is mountable as a structural unit on a handlebar. In this way the fixed handgrip is securely fixed on the handlebar. Moreover, the individual components have an advantageous size for production in an injection moulding process. The twist-grip shifter gives the operator a precise operation by avoiding disruptive frictional effects of the rotatable handgrip part on the mounting tube, for which purpose ball bearings are used for bearing the take-up spool, and a metallic positioning ring is used in the positioning mechanism. | 04-25-2013 |
20130095969 | Derailleur Guide Device - The invention relates to a chain catcher used on multiple chainring arrangements on bicycles in combination with a derailleur to prevent the drive chain from slipping off the smallest chainring into the space between the chainring and the bicycle frame. The embodiment of a chain catcher according to the invention permits especially simple mounting and adjustment by using an additional fastening element. The corresponding method includes completion of the positioning, fastening, and adjustment of the derailleur before the chain catcher is installed. | 04-18-2013 |
20130072334 | Sprocket for Rear Wheel of a Bicycle - The present invention relates to a sprocket for use with a bicycle, the sprocket for use with a multi-sprocket assembly and chain, wherein the sprocket is made from a light but comparatively soft material and does not have shifting aids in the form of recesses and notches on the sprocket teeth where the chain rollers are in contact with the load flanks of the teeth. | 03-21-2013 |
20130017914 | Driver for Mounting a Multiple Sprocket Arrangement to a Bicycle Rear Axle ArrangementAANM Braedt; HenrikAACI GebrunnAACO DEAAGP Braedt; Henrik Gebrunn DE - A driver for mounting a multiple sprocket arrangement to a bicycle rear axle arrangement. The multiple sprocket arrangement includes a sprocket assembly having a plurality of sprockets with different numbers of teeth and an adapter. The rear axle arrangement includes a hub. The driver includes an input torque transmitting profile for transmitting torque from between the sprocket assembly and the driver. A positioning section positions the sprocket assembly in the radial direction. External thread threadably receives the adapter and is disposed between the input torque transmitting profile and the positioning section. An output torque transmitting arrangement transmits torque between the driver and the hub. | 01-17-2013 |
20120309572 | Multiple Sprocket Assembly for a Bicycle Gearing as Well as Rear Axle Arrangement with a Multiple Sprocket Assembly of this Type - The invention relates to a multiple sprocket assembly with a plurality of sprockets with different numbers of teeth for assembly on a rear axle of a bicycle, comprising a base body, on which at least a part of the plurality of sprockets is provided, as well as a support ring that is connected to or can be connected to the base body in a torque-transmitting manner. It is further provided thereby that the base body and the support ring are configured on their radially inner region respectively with a radial inner bearing section for rotatable bearing on a rear axle of the bicycle and that the support ring has at least one torque transmission section configured separately from the bearing section for transmitting a torque from the multiple sprocket assembly to a hub body. | 12-06-2012 |
20120302384 | Multi-Gear Cassette for a Bicycle - The invention relates to a multi-sprocket cassette mountable to a bicycle rear wheel for engaging a drive chain. The cassette includes a conical body formed as a single piece having a center axis that includes a plurality of sprocket portions, each of the plurality of sprocket portions including a plurality of teeth formed thereabout for engaging the drive chain and a plurality of connecting portions supporting each of the plurality of sprocket portions. One or more of the plurality of connecting portions includes a first wall thickness and one or more of the plurality of connecting portions includes a second wall thickness. The second wall thickness is less than the first wall thickness. A plurality of openings is formed through each of the plurality of connecting portions having the first wall thickness. | 11-29-2012 |
20120277054 | OPERATING MECHANISM FOR A BICYCLE MULTIPLE GEAR HUB - An operating mechanism by which the linear movement of a gearshift cable is converted into a rotational movement of an operating sleeve and transmitted to the interior of a bicycle multispeed gear hub. | 11-01-2012 |
20120208662 | MULTI-GEAR CASSETTE AND DAMPING DEVICE - The invention relates to a damping device on a multi-gear cassette for a rear wheel of a bicycle, wherein percussive forces produced by the chain members running from the slack span of the chain onto the sprocket are damped. This is achieved by damping the chain in the region of the chain run-in on the sprocket where no loads are borne. In one embodiment, a damping ring is provided for the purpose of supporting the chain link plates, and the tooth contour of the tooth flank which does not transmit load force is set back, and the tooth root space according to the invention is recessed toward the hub center. As such, when the chain is fed in to the sprocket, the chain link plate contacts the damping ring rather than the chain roller impacting the tooth flank or the tooth base. | 08-16-2012 |
20120083383 | HUB WITH MECHANISM TO PERMIT BACKWARDS MOVEMENT WITHOUT PEDAL MOVEMENT - A control mechanism for decoupling a drive ratchet on a bicycle hub makes it possible to push the bicycle backwards while the foot pedals of the pedal crank drive remain still. These functions can be applied to folding bicycles, in which pedal movements are harmful when in their folded up state. The control mechanism includes a controlling sleeve coupled to the drive ratchet, which is indirectly connected by means of a frictional device to the unmoving hub axle. | 04-05-2012 |
20110224037 | Cable Control Actuating Device For A Bicycle Derailleur - A device for guiding and supporting the cable for actuating a front derailleur for bicycles. The device provides the cable guide parts with alternative cable routing paths, wherein the cable guide parts are securely connected to the connecting arm. The cable clamping screw for clamping the control cable is housed in a space saving manner in an opening in the cable guide part, wherein a direct transfer of the actuating forces to the connecting arm is possible with small frictional losses. | 09-15-2011 |
20110224036 | Axial Fixing Device With An Integrated End Plug - An axial fixing and closure member arrangement including an insert element for producing a rotatable, but axially fixed connection between the rotary axle of the chain guide of a rear gear change mechanism for bicycles and the related lower pivot head by means of a spring element, wherein additionally the insert element also has a sealing effect by providing an integrated closure member. | 09-15-2011 |
20110130242 | Multi-Speed Internal Gear Hub for a Bicycle - A bicycle multi-speed internal gear hub including a hub axle, a hub shell rotatably mounted about the hub axle, a driver rotatably mounted about the hub axle and at least two gear stages providing at least two gear ratios. Each gear stage includes a planetary gear mechanism having at least one sun gear, a sun gear clutch connecting the sun gear and the hub axle to rotate together, a planet carrier and a ring gear. The at least two gear stages connected in series. One of the at least two gear stages is an overdrive gear stage with a greater speed at a gear stage output then at a gear stage input, the other of the at least two gear stages is an underdrive gear stage with a lower speed at the gear stage output than at the gear stage input. One of the at least two gear stages is coupled to the driver and the other of the at least two gear stages is coupled to the hub shell. One of the at least two gear stages provides a plurality of smaller gear ratios, the other of the at least two gear stages provides a plurality of larger gear ratios. A direct drive gear stage with a gear ratio of 1:1 is not used in one of the at least two gear stages. | 06-02-2011 |
20110105263 | Multiple Sprocket Assembly for a Bicycle - A multiple sprocket assembly engageable with a roller chain and mountable to a driver of a rear wheel of a bicycle. The multiple sprocket assembly includes a smaller sprocket and a larger sprocket. Each of the smaller and larger sprockets has a radially outer ring with a plurality of teeth for engaging the roller chain. The radially outer ring has a plurality of radially outer pin mounts including a hole. The radially outer pin mounts are aligned with the teeth. The sprockets have a plurality of radially inner pin mounts connected to the radially outer ring forming a single piece. The radially inner pin mounts includes a hole. The radially inner pin mounts are aligned with the plurality of outer pin mounts disposed on an adjacent smaller sprocket. A plurality of pins connects the smaller sprocket and the larger sprocket to each other. The pins are mounted in the holes in the outer pin mounts on the smaller sprocket and in the holes in the inner, pin mounts of the larger sprocket. A first mounting sprocket is connected to the smaller sprocket by pins and a second mounting sprocket is connected to the larger sprocket by pins. The first and second mounting sprockets are supported on the hub axle at two positions spaced, apart in the axial direction of the hub axle. | 05-05-2011 |
20100081527 | Bicycle Derailleur - A derailleur is configured to be mounted to a bicycle frame. The derailleur includes a clamp mountable to the bicycle frame. The clamp includes a first end having a threaded portion receiving a clamp fastener for tightening of the clamp about the bicycle frame. A base member is connected to the clamp and includes a bore receiving the clamp fastener. A chain guide receives and laterally displaces a chain. First and second link members pivotably connect the base member and the chain guide. One of the link members includes an opening aligned with the bore such that the clamp fastener passes through the opening and into the bore of the base member. | 04-01-2010 |
20100075791 | Multiple Sprocket Assembly - A multiple sprocket assembly configured to be mounted to a wheel hub. The multiple sprocket assembly includes a truncated conical shell having a first opening proximate a small shell base and a second opening proximate a large shell base. The openings are coaxial with a central axis. A plurality of tooth sprockets having different numbers of chain-engaging teeth is disposed on the shell and extends radially of the central axis. A radial load transmitting profile is configured on the shell proximate one of the small and large shell bases. A torque load transmitting profile is configured on the shell proximate the large shell base. The shell, sprockets and the radial and torque load transmitting profiles embody a single piece. A load transfer element is connected to the large shell base to radially support the shell. The load transfer element has a greater number of chain-engaging teeth disposed on an outer periphery thereof and having a larger diameter than a largest sprocket on the shell. | 03-25-2010 |
20100071499 | Bicycle Shifter - A shifter designed to actuate a gear change device of a bicycle by pulling and releasing a control cable. The shifter includes a base plate mountable to the bicycle, a cable spool and cable-pull and cable-release lever assemblies. The cable spool is rotated in a cable-pull direction to wind the control cable thereon and in a cable-release direction to unwind the control cable therefrom. The cable-pull and cable-release lever assemblies are operatively connected to the cable spool to rotate the cable spool in the cable-pull and cable-release directions, respectively. The cable-pull lever assembly includes a cable-pull lever rotated about a first axis and at least two winding pawls received by and rotating with the cable-pull lever about the first axis to transmit rotational movement of the cable-pull lever to the cable spool. | 03-25-2010 |
20100004081 | Multiple Sprocket Assembly - A multiple sprocket assembly for receiving a chain and transferring torque therefrom to a bicycle rear wheel hub rotatable about a hub axis. The chain has alternating pairs of inner and outer link plates connected by chain rollers. The multiple sprocket assembly includes a plurality of different-sized sprockets arranged coaxially about the rear wheel hub. The sprockets have a plurality of teeth and tooth roots spaced around a periphery of the sprockets for engaging the chain. The tooth roots forming a dedendum circle. The sprockets have a maximum sprocket width near the dedendum circle, substantially bridging a gap between paired inner link plates sandwiching the chain roller therebetween, substantially minimizing axial play between a guide area on the sprocket and an overhang of the inner link plates overlapping the guide area when the chain is engaged with the sprockets. | 01-07-2010 |
20090230758 | Bicycle Wheel Hub - The present invention provides a bicycle wheel hub that generally includes an axle, an input sprocket, an output shell, a one-way clutch and a locking mechanism. The one-way clutch operatively connects the input sprocket and the output shell and is configured to drive the output shell in a first direction. The locking mechanism is configured to operatively connect the output shell and the input sprocket to drive the output shell in a second direction to operate the bicycle wheel hub in a fixed drive mode. The locking mechanism is configured to operatively disconnect the output shell and the input sprocket to operate the bicycle wheel hub in a freewheel drive mode. | 09-17-2009 |
20090215566 | Multiple Sprocket Assembly - A multiple sprocket assembly receives a chain and transfers torque therefrom to a rear wheel hub of a bicycle. The multiple sprocket assembly includes a plurality of different-sized multiple-toothed sprockets arranged coaxially about the rear wheel hub. A plurality of annular support elements extend between the sprockets and have a plurality of openings disposed circumferentially on the annular support element. The openings are aligned with tooth gaps of an adjoining smaller sprocket. The sprockets and the annular support elements are configured to transmit torque from the smaller sprocket to a larger sprocket. | 08-27-2009 |
20090215565 | Multiple Sprocket Assembly - A multiple sprocket assembly receives a chain and transferring torque therefrom to a rear wheel hub of a bicycle. The multiple sprocket assembly includes a plurality of different-sized, multiple-toothed sprockets arranged coaxially about the rear wheel hub. Each sprocket has a tooth front face facing an adjoining smaller sprocket. A plurality of annular support elements extend between the sprockets, each annular support element including an annular disc having a disc front face facing the adjoining smaller sprocket. The tooth front face of the sprocket has an offset relative to the disc front face of the annular disc. | 08-27-2009 |
20090095117 | Control Cable Adjustment Device - A control cable adjustment device for adjusting a control cable extending between a control mechanism and an operating mechanism. The adjustment device includes an adjuster rotatably connected to a housing of the control mechanism and a spring element having at least one retention segment. The retention segment engages a detent contour of the adjuster to retain the adjuster in its current position. Another segment of the spring element may have a second function as a return spring for a gear shifter or a brake lever. | 04-16-2009 |
20090082147 | Multi-Speed Sprocket Assembly - A multi-speed sprocket assembly is provided for engaging a bicycle chain displaceable by a derailleur. The multi-speed sprocket assembly generally includes at least one smaller sprocket and at least one larger sprocket. The larger sprocket includes first and second transitional segments for alternatively receiving a shifting chain segment of the bicycle chain shifting from the smaller sprocket to the larger sprocket. The first transitional segment includes a first run-on ramp configured to receive an outer link plate of the shifting chain segment. The first run-on ramp has a first support point configured to bend the transferring bicycle chain at a first angle to position a first chain roller against a no-load tooth flank of the larger sprocket while a second chain roller rests against a load tooth flank of the smaller sprocket. The second transitional segment includes a second run-on ramp configured to receive the outer link plate of the shifting chain segment. The second run-on ramp has a second support point configured to bend the shifting chain segment at a second angle to position the first chain roller against the no-load tooth flank of the larger sprocket while the second chain roller rests against the load tooth flank of the smaller sprocket. | 03-26-2009 |
20080224530 | Bicycle Multi-Speed Hub - A multi-speed hub for cantilever mounting to a bicycle frame generally includes a planetary gear mechanism, a hub shaft, a hub shell, a spoke shell, a driver and a driven gear. The hub shell is cantilever-mounted to the bicycle frame and configured to enclose the planetary gear mechanism and the hub shaft. The spoke shell, driver and driven gear are rotatably supported by the hub shell One end of the hub shaft is indirectly supported by the hub shell and the other end of the hub shaft is fixed to the bicycle frame. | 09-18-2008 |