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Rotary crank power

Subclass of:

280 - Land vehicles

280029000 - WHEELED

280200000 - Occupant propelled type

280210000 - With propulsion means

Patent class list (only not empty are listed)

Deeper subclasses:

Class / Patent application numberDescriptionNumber of patent applications / Date published
280260000 With gearing 52
280262000 With pitman 2
20090127817Dual-Mode Tricycle - An apparatus is provided for rotating a wheel. The apparatus includes a hub, at least one two-way bearing fit in a hub, a shaft inserted through the two-way bearing, a first disc secured to the shaft, a first one-way bearing provided between the first disc and the hub for allowing only the forward spinning of the hub on the shaft, a second disc rotationally provided on the shaft, a second one-way bearing provided between the second disc and the hub for allowing only the rearward spinning of the hub on the shaft and a clutch provided between the second disc and the shaft.05-21-2009
20140361511BICYCLE TRANSMISSION - A chainless drive mechanism for a bicycle using pedal arms, one on each side of the bicycle, each pedal arm carrying a pedal engageable with a rider's foot. Each pedal arm is mounted to a crank by a rotating joint and connected to the frame of the bicycle by a link, each link having rotating joints at each end. The cranks are connected by a shaft passing through the hub of to the driven wheel of the bicycle. The cranks may be connected to the driven wheel by a multi ratio free wheeling gear mechanism.12-11-2014
Entries
DocumentTitleDate
20080217881Method and Device for Pedalling - A pedalling method and device for a user in standing position. The device includes a drive shaft whereof the rotation about its axis is coupled with the rotation of two right and left pedals. The pedals are mutually assembled via a plurality of cranks, connecting rods, and pivots such that: the pedals can travel freely along a circular path, for a constant rotational speed of the shaft, the speeds of the pedals are recurrent at equal time intervals but out of phase, minimal at lower dead center, maximal at upper dead center, and when the pedals are simultaneously at a common height lower than that of the center of the trajectory, the speeds of the pedals are equal. The vertical oscillation of the center of gravity of a user in standing position is reduced compared to a conventional pedal assembly.09-11-2008
20080224440Crank for Bicycle and Method of Producing the Same - A crank for a bicycle, excellent in production efficiency, excellent in fatigue durability and rigidly, and light in weight. The crank has an outer shell made of a fiber-reinforced plastic, a first insert member configured and arranged to introduce a load from a pedal shaft, and a second insert member coupled to a bracket spindle and configured and arranged to transmit a load to a sprocket. The outer shell comprises at least two fiber-reinforced plastic members at least a part of each of which is molded in advance.09-18-2008
20090174169HUMAN-POWERED MACHINE OR VEHICLE - A muscle-powered machine has a frame, a drive wheel rotatably mounted on the frame and rotatable in a plane defining a normal straight-ahead travel direction, and a drive pedal engageable with a foot of a user of the machine and having one end pivoted on the frame forward of the user's foot. The pedal is pivotal through an acute angle on the frame between an upper position and a lower position with the pedal extending at an angle of 90° ±10° to a lower leg of the foot on the pedal. A quotient of the maximum vertical travel of the pedal measured perpendicular to the pedal in its lower end position and the sine of the angle is greater than the length of the pedal measured radially of its pivot. A drive connected between the pedal and the drive wheel converts oscillation of the pedal between its end positions into rotation of the wheel.07-09-2009
20090261553ASSEMBLY OF BICYCLE COMPONENTS IN MUTUAL ROTATION AND BICYCLE COMPRISING SUCH AN ASSEMBLY - The invention relates to an assembly (10-22-2009
20100013185BICYCLE - A bicycle is provided on which a person can efficiently ride in a comfortable posture along a slope and effectively utilize the strength of the legs while pedaling along a level road. This bicycle includes: a stem fixing a handle on an upper-end part thereof and including a front wheel-shaft supporting member in a lower part thereof; a front wheel attached pivotally via a front wheel shaft to a lower-end part of the front wheel-shaft supporting member; a front frame supporting a middle part of the stem in such a way that a front-end part thereof makes a handling turn freely, and extending rearward; a rear frame fixing a saddle on an upper-end part thereof, including a rear wheel-shaft supporting member in a lower part thereof, and attached pivotally at a lower-end part of the rear wheel-shaft supporting member via joint members to a rear-end part of the front frame in such a way that the rear frame sways back and forth freely; and a rear wheel disposed via a rear wheel shaft a predetermined height above the joint members at the rear wheel-shaft supporting member in such a way that the rear wheel rotates freely, and rotated by a pedal-attached crank on each side.01-21-2010
20110031716Tricycle and Steering Mechanism Therefor - The present invention consists of a human-powered, wheeled vehicle, having: a) two front wheels, each of the two front wheels pivotally coupled to a frame by a pivoting mount; b) one or more rear wheels, one or more of the rear wheels coupled to a drive mechanism and operative to provide a driving force for the vehicle; and c) a steering mechanism coupled to the front wheels, the steering mechanism including a handle for steering control by a driver of the vehicle, a first linkage connecting the handle to a first one of the pivoting mounts and a second linkage connecting the first one of the pivoting mounts to a second one of the pivoting mounts.02-10-2011
20110084463Extended Crank System - An extended crank system for a bicycle or similar crank driven system has frame with a bottom bracket and a pair of cranks operatively connected to opposite ends of the bottom bracket. A chain ring is operatively connected to one of the cranks. A crank hub is rotatably connected to each of the cranks and extends away from and is substantially parallel to the bottom bracket. A pair of crank extensions is connected to the crank hub, and a pair of crank extension hubs is connected to the pair of crank extensions. Additionally, a pair of crank followers is pivotably connected to opposite ends of the crank extension hubs at respective first ends of the crank followers, as well as pivotably connected to opposite ends of a top bracket mounted to the frame above the chain ring and behind the seat post, at respective second ends of the crank followers.04-14-2011
20110248467Collapsible Recumbent Tricycle - One embodiment of a tricycle (10-13-2011
20110260426BICYCLE WITH BIDIRECTIONAL INPUT AND ONE-WAY OUTPUT TRANSMISSION COMBINED WITH CRANK HOLE THEREOF - For the bicycle with bidirectional input and one-way output transmission combined with crank hole thereof of the present invention, the input shaft used for bidirectionally drive of the transmission with bidirectional input and one-way output is installed through and combined with the pedal crank hole of the bicycle frame.10-27-2011
20110266769Pedal Powered Wheeled Vehicle - A bicycle having rotatable drive member in the form of a hollow drum (11-03-2011
20110304118CHILD-POWERED VEHICLE - A child-powered vehicle including a body, a front axle rotatably coupled to the body, a rear axle assembly pivotally coupled to the body, and a pair of pedals that drives the front axle and associated wheels for movement. The rear axle is pivotable about a steering axis to alter the orientation of the rear axle with respect to the front axle, such that the steering axis is non-parallel to the rear axle to provide a small turning radius.12-15-2011
20110309597BICYCLE PEDAL WITH INTEGRATED CABLE LOCK - A locking bicycle pedal includes coiled cables on spools with locking mechanisms attached to free ends. The cables may be extended from the spools. The locking mechanism may comprise a key or combination lock. The locking mechanisms attach to the pedal when not in use for locking the bicycle. A bicycle may be equipped with one or more locking pedals. Where two locking pedals are provided, the locking mechanisms of one pedal may interlock with each other and/or the locking mechanisms of the other pedal. The coil and locking mechanisms do not interfere with normal use of the bicycle.12-22-2011
20120013099COMBINATION OF A SHOE, A FRAME AND A PEDAL FOR RACING BICYCLES - A shoe for racing bicycles on the underlying sole of which a plate (01-19-2012
20120248732BICYCLE HAVING BRAKE WITH QUICK RELEASE MECHANISM - A bicycle is provided with a frame, a drive member and a bicycle brake. The drive member is movably mounted to the frame for driving the bicycle. The bicycle brake is mounted to the frame. The bicycle brake includes a quick release mechanism that has an operating part and a contact part. The operating part is operatively arranged to be toggled between a closed position and a released position that is separated from the closed position. The contact part is provided on the operating part and configured such that the operating part contacts the drive member while the operating part is positioned at the released position. The contact part is configured such that after the contact part contacts the drive member due to operation of the drive member, the operating part is then moved from the released position to the closed position.10-04-2012
20120256389SPARKING DEVICE FOR A PERSONAL MOBILITY VEHICLE - A spark generating device that is supported by a tricycle is movable to a position in which the spark generating device contacts the riding surface. The spark generating device includes a handle actuation portion and a spark portion that creates sparks on the riding surface as a result of frictional contact with the riding surface. The spark generating device can also include a handle actuation portion which is accessible to the user and allows the user to move the spark generating device to the second position without having to manipulate the wheels or pedals of the tricycle.10-11-2012
20120256390BICYCLE - The technical result of the claimed design consists in maintaining the physiological curvatures in the neck and lumbar parts of the spine, under the “healthy back” principle. The technical result is achieved in a bicycle that comprises a frame provided with handlebars pivoted thereon, wheels, a pedal mechanism, and a seat with a backrest, the seat backrest being provided with vertically movable pads and having a variable angle of inclination to the seat, the pads having a constant or variable volume, and the handlebars having a position that can be varied vertically and horizontally and a variable angle of inclination to the seat.10-11-2012
20130001917Mobile Ergonomic Exercise Tricycle Apparatus and Method - A mobile ergonomic exercise tricycle apparatus and related method of use, comprising: two front wheels; one rear wheel; two front handles, one for each hand of a rider; two pedals, one for each foot of the rider; and a connection between the pedals and the rear wheel such that actuation of the pedals by the rider's feet rotates the rear wheel to move the tricycle forward; wherein: the tricycle does not comprise any seat for sitting; and the pedals are positioned relative to the front handles such that when the rider's feet are atop the pedals and the rider's hands are touching the front handles, the rider is forced into a substantially upright, standing position when the apparatus is at rest and in motion.01-03-2013
20130043665TOOL-LESS PEDAL ASSEMBLY - A pedaled vehicle includes a frame, a wheel rotatably coupled to the frame, a crank assembly operatively coupled to the wheel and having a bore, a pedal received in the bore, and a spring clip for securing the pedal to the crank assembly. The spring clip includes at least one flexible tab or leg capable of flexing between a first configuration, where the spring clip allows a shaft of the pedal to pass through the bore, and a second configuration, where the pedal shaft is prevented from being removed from the bore. A method for coupling a pedal to a vehicle in a tool-less manner is also disclosed.02-21-2013
20130056949MULTIPLE CONFIGURATION TRICYCLE - A wheel and hub assembly for a vehicle includes a clutch dog pivotally attached to a wheel. A toothed ratchet wheel is attached to a pedal crank and positioned adjacent to the clutch dog. A hub cover includes a protrusion. The hub cover is attached to the wheel in a sliding fashion so as to slide between an unlocked position, where the protrusion engages the clutch dog so as to prevent the clutch dog from engaging the toothed ratchet wheel when the pedals are turned in a forward direction; and a locked position, where the protrusion does not engage the clutch dog so that the clutch dog engages the toothed ratchet wheel when the pedals are turned in a forward direction.03-07-2013
20130075996TRICYCLE - Adult-sized tricycles may include a large front wheel, a downward-sloping frame, and a riding position in which the lower legs of a rider approximate a head tube angle.03-28-2013
20130147151PNEUMATICALLY SUPPORTED BICYCLE SEAT ASSEMBLY - An improved bicycle seat assembly with pneumatic support, which is adapted for use with a standard bicycle seat post. The pneumatic support of the seat assembly comprises an inflatable bladder positioned between and retained by upper and lower retaining plates. The inflatable bladder is preferably the shape of an annular ring like a bicycle tire inner tube and includes a valve stem to adjust the level of inflation of the inflatable bladder.06-13-2013
20130168943TRICYCLE WITH VARIABLE POSITION FOOTBOARDS - A tricycle has a frame, a front wheel with drive pedals, a seat, and a footboard. The footboard of the novel tricycle can optionally be mounted on the frame in a first orientation and at least a second orientation.07-04-2013
20130207366BOTTOM BRACKET ASSEMBLY OF A BICYCLE AND LEFT CRANK ARM ASSEMBLY THEREOF - A bicycle bottom bracket assembly that reduces the accumulation of dirt and/or corrosive substances inside the shaft extending between the crank arms of the assembly. The bottom bracket assembly includes a shaft having a through-cavity that extends along its longitudinal direction; a crank arm is associated with each end portion of the shaft, and the through-cavity extends unobstructed through the crank arms and the shaft.08-15-2013
20130249185METHOD OF MAKING A CONVERTIBLE PUSH-BICYCLE - The teachings provided herein relate to an articulable crankset for converting a pedal-powered vehicle into a push-powered vehicle having the articulable crankset in a retracted position to provide at least less of an obstruction to a user's legs during use of the push-powered vehicle than a non-retractable crankset. The vehicle can be a bicycle, and the articulable crankset can be a component of a production bicycle or a component of a conversion kit that will convert a bicycle from a pedal-powered bicycle to a convertible bicycle that can also function as a push-powered bicycle.09-26-2013
20130264792FRONT-WHEEL-DRIVE VEHICLE HAVING A CHASSIS THAT FOLDS TO CREATE A PROTECTIVE, CARRY-ON CASING - The teachings provided herein are generally directed to compact vehicle drive mechanisms that can be used in the design of a foldable, carry-on vehicle. The compact drive mechanisms presented herein, for example, have contributed to the advent of the compact, carry-on bicycles set-forth in the teachings which include drive-and-steering units and drive-and-chassis units.10-10-2013
20130300084DUAL STEERABLE VEHICLE - A tricycle may be operable between a first mode of operation steerable by a tricycle rider, and a second mode of operation steerable by an individual pushing the tricycle. In both such first and second modes, the frame of the tricycle is configured to rotatably support the rear wheels and configured to support the head tube at a distance from the rear wheels such that a distance between the head tube and rear wheels need not necessarily be changed even when the front wheel axis location is changed from one mode to another.11-14-2013
20130341884ORTHOPEDIC MOBILITY DEVICE - An adult scale three-wheeled device facilitates movement for mobility challenged persons. The device is foot propelled while seated either through walking while seated or pedaling. The device is provided with a limited footprint for navigating confined areas while the individual is seated in a substantially standing position, with the pedals being repositionable so as to allow unobstructed walking while remaining seated. A lockable braking system prevents one or more wheels from turning. The device is collapsible for storage.12-26-2013
20140001728SENSOR APPARATUS FOR DETERMINING FORCES APPLIED TO A PEDAL OF A BICYCLE01-02-2014
20140027997CONVERTIBLE UNI-BICYCLE - The present invention is a convertible uni-bicycle, wherein the front end of a bike frame is connected to the outer wall of a head tube using a dismountable structure, and the top end of the head tube is connected to a handlebar using a dismountable structure. The handlebar disposes a brake lever which is connected to an upper brake cable, and the upper brake cable is interconnected to a lower brake cable using a jointing structure. Then, the top end of the bike frame mid-section is connected to a seat post using a dismountable structure, and the bottom end of the bike frame mid-section disposes a driving mechanism which is installed with two dismountable pedals. Thus, the present invention provides a means for the user to convert bicycle into unicycle through easy steps.01-30-2014
20140035254FOLDING BICYCLE - The subject of the invention is a bicycle with a drive on front wheel, which after turning the handlebar by cca 110° relative to the frame of the front wheel considerably reduces its overall dimensions and which can be easily adjusted tor two persons.02-06-2014
20140049020INSERT FOR ADJUSTMENT OF OPERATIONAL CHARACTERISTIC OF A BICYCLE AND BICYCLE PORTION WITH INSERT - An insert for a bicycle has a central portion and a contiguous outer portion to form a unitary elongated body, the body being dimensionable by reference to major and minor datum lines, the outer portion forming a flange. The body includes a first outer surface defined by the central portion, and a second opposing outer surface defined by the central portion and the outer portion. The central portion includes a through-hole that extends perpendicularly through the body from the first outer surface to the second outer surface, wherein the hole defines a hole axis. The central portion has a non-circular outer profile that encloses the hole axis, and the flange has a non-circular outer profile that encloses the hole axis, the outer profile of the flange being larger than the outer profile of the central portion. The hole is disposed asymmetric with respect to the minor datum line.02-20-2014
20140117642TRICYCLE WITH VARIABLE POSITION FOOTBOARDS - A tricycle has a frame, a front wheel with drive pedals, a seat, and a footboard. The footboard of the novel tricycle can optionally be mounted on the frame in a first orientation and at least a second orientation.05-01-2014
20140191490VEHICLE HAVING A SWIVEL WHEEL - A tricycle may be operable between a first mode of operation steerable by a tricycle rider, and a second mode of operation steerable by an individual pushing the tricycle. A rider handle, in the first mode, may be configured to be rotationally coupled with the stem in a manner permitting a tricycle rider to exert forces on the rider handle and thereby turn the fork, and the rider handle in the second mode, being configured to be rotationally uncoupled from the stem, preventing forces on the rider handle from turning the fork. At least one rotation restrictor may be included for preventing the front wheel from turning to a position where the front wheel axis leads the fork axis, and for maintaining the front wheel axis in a position trailing the fork axis both when the tricycle is propelled by a tricycle rider in the first mode and when the tricycle is pushed from behind in the second mode.07-10-2014
20140197616SAND-RIDEABLE BICYCLE WITH POSITIVE TRACTION GEAR ASSEMBLY - An unmotorized sand-rideable bicycle utilizes oversized balloon tires that have an enlarged footprint to permit the bicycle to ride up over even loose sand to provide ease of pedaling, as well as enhanced steering and stability over that associated with standard bicycles. A positive traction gear assembly may be employed to switch between single and dual rear wheel drive.07-17-2014
20140210178Multi-Use Vehicle Assembly - A multi-use vehicle assembly provides a means for entertainment and mobilization. The vehicle assembly includes a frame assembly having a first frame coupled to a second frame. The frame assembly has a center frame coupled to and extending between the first frame and the second frame. A plurality of wheels is coupled to the frame assembly. The plurality of wheels comprises a left back wheel, a right back wheel, and a central front wheel. The left back wheel is coupled to the first frame. The right back wheel is coupled to the second frame. The central front wheel is coupled to the center frame. A steering mechanism is coupled to the frame assembly. The steering mechanism is mechanically coupled to the central front wheel. A drive system is operationally coupled to one of the plurality of wheels.07-31-2014
20140265216BICYCLE FRAME - A bicycle frame having a first frame section carrying a handle bar assembly and a front wheel assembly; a second frame section carrying a crank unit and a rear wheel assembly; a first primary connecting arm carried by said first frame section being received into a second primary connecting arm carried by said second frame section, wherein said first primary connecting arm is telescopically carried by said second primary connecting arm for extending and retracting said first frame section relative to said second frame section; a mounting plate included in said second frame section extending over said rear wheel assembly; a plate suspension member included in said second frame section connecting said mounting plate to said rear wheel assembly for controlling relative motion between said mounting plate and said rear wheel assembly. A rider platform is carried by said mounting plate for accommodating a rider.09-18-2014
20140300077Ride n' Grow Children's Bicycle System - The present invention is in the technical field of sporting and recreation. More particularly, the present invention is in the technical field of children's bikes. Conventional children's bikes last only a short time because the children outgrow them and or no longer find the style of the bike appealing. It is costly and time consuming to keep up with a child's needs and also his ever-changing tastes in trends. The present invention is a complete response to this issue. The present invention is a bicycle with a frame that has been designed to allow all sizes of wheel diameters to work on the same bike. The tires can be changed and the look of the bicycle can also be changed. Thus as a child grows, the bike can grow with him.10-09-2014
20140306422Personal Vehicle Frame and Method of Assembly - This invention is directed to a personal vehicle comprising: a frame that defines a “U” channel in the bottom of the frame; a slot defined in a rear end of the frame; a rear portion wherein the front side of the rear portion is received into the slot of the frame to attach the rear portion to the frame wherein an angle defined by the long axis of the frame of the rear portion is obtuse; a drive system received in a drive system opening defined in the frame and disposed rearward of a pedal attachment attached to the frame; a pedal attached to the frame; and, a handle attached to a shaft carried by the front portion of the frame and a front wheel carried by the shaft.10-16-2014
20140312591Blow Molded Toy Cycle - A blow molded toy cycle has a female bearing area with tapered and recess sections. A fork has a corresponding male bearing area that includes a tapered section and an annular protrusion section. A protrusion spaced at a distance from the annular protrusion extends from the shaft and has a surface to contact a top surface of the body to secure the fork when the male and female bearing areas are in contact. The fork has integrally formed tabs that to bend around an axle to form a bearing area for the axle that allows the axle to rotate within the fork. A blow molded pedal attaches to a section of the axle and has a series of ribs disposed between side sections to form a bearing area that allows the pedal to rotate around the axle. Two rear and one front wheels attach to the body and fork respectively.10-23-2014
20140319796STUDENT, TEACHER, ADMINISTRATIVE AND RESEARCH COORDINATING HELPER - As a professional in the field of disability, I worked in different positions and presently working as special teacher. The present invention is related to the field of education, in my day to day life I had seen many things stopping us to move forward due to the lack of resources. Pretty soon our non-renewable resources are going to be shorten, due to that, the major field is going to be effected is non-other than education.10-30-2014
20140319797QUICK-RELEASE BICYCLE CRANK ASSEMBLY - A quick release bicycle crank assembly for a bicycle allows installation and removal of cranks from a crankset without the use of tools. The quick release mechanism has a coupling and a spindle wherein the coupling includes an outer sleeve that opens and closes the coupling, thereby allowing the spindle to be inserted or removed from the coupling.10-30-2014
20140367941Cycling Vehicles such as Bicycles - A cycling vehicle (12-18-2014
20150021876Folding Bicycle - The present invention produces a folding bicycle (01-22-2015
20150035248EXTENDABLE BICYCLE - The present invention relates to an extendable bicycle comprising: (a) at least two wheels (02-05-2015
20150137475BICYCLE WITH REAR DRIVE ASSEMBLY FOR ELLIPTICAL MOVEMENT - A bicycle with a rear drive assembly configured to allow pedal boards to be pivotable while moving in an elliptical trajectory and which allows a cyclist to ride in an erect position is disclosed. A front end of each of the pedal boards is pivotably connected to an end of a crank and each of the pedal boards is connected to or integral with a guide rod extending rearwardly from the pedal board. The guide rods are supported by a rear drive assembly comprising a transverse tube that is horizontally connected to a frame of the bicycle. A roller is mounted at each end of the transverse tube. Each roller has a groove which accommodates the cross-section of the guide rod.05-21-2015
20150291242BICYCLE ASSEMBLY WITH BOTTOM BRACKET AREA - A bicycle assembly can include a main frame having a bottom bracket area to receive a bottom bracket. The bottom bracket area can be made of carbon fiber with one or more embedded seat blanks to serve as bearing surfaces within the bottom bracket area. The disks may be machined to a high tolerance to receive a bottom bracket.10-15-2015
20150329164Human Powered Land Vehicle - A human powered land vehicle has two steered front wheels (11-19-2015
20150336630CHILDREN'S TRICYCLE - A children's tricycle comprises a body, a front wheel pivotally assembled to the body, a first pedaling assembly assembled to the front wheel, a second pedaling assembly assembled to the front wheel, a screw for making the first pedaling assembly threaded with the second pedaling assembly. A first inserting rod of the first pedaling assembly and a second inserting rod of the second pedaling assembly are connected to the front wheel separately, such that the first and second pedaling assemblies can be assembled to or detached from the front wheel quickly. The first and second pedaling assemblies can be assembled to the tricycle for the child to step on, and can also be detached from the tricycle when the child is learning to walk, such a tricycle is not only money-saving since the parents don't need to buy a special baby walker additionally, but also has high convenience and security.11-26-2015
20150353162BICYCLE DAMPING ENHANCEMENT SYSTEM - A bicycle shock absorber and methods for differentiating between rider-induced forces and terrain-induced forces includes a first fluid chamber having fluid contained therein, a piston for compressing the fluid within the fluid chamber, a second fluid chamber coupled to the first fluid chamber by a fluid communication hose, and an inertial valve disposed within the second fluid chamber. The inertial valve opens in response to terrain-induced forces and provides communication of fluid compressed by the piston from the first fluid chamber to the second fluid chamber. The inertial valve does not open in response to rider-induced forces.12-10-2015
20150360741PROTECTIVE, CARRY-ON VEHICLE - The teachings provided herein are generally directed to compact vehicle drive mechanisms that can be used in the design of a foldable, carry-on vehicle. The compact drive mechanisms presented herein, for example, have contributed to the advent of the compact, carry-on bicycles set-forth in the teachings which include drive-and-steering units and drive-and-chassis units.12-17-2015
20160039487BICYCLE WITH TRANSMISSION ELEMENT REMOVABLE FROM THE DRIVE WHEEL - Bicycle operated by transmission device including transmission element rotatably integral with drive wheel and coaxial thereto, and a frame with a front and rear fork; rotatable removable support at the two ends of the arms of each fork, for the hub of a front free wheel and a rear drive wheel respectively, the support including a tie-rod received in a coaxial through-hole made in the hub and in relative holes made at the free end of each arm of the relative fork. The tie-rod, when tensioned by appropriate means, allows holding the relative wheel in position on the corresponding fork. The transmission element supported rotatably by one of the arms of the rear fork. A positive-locking fit rotatably connects the transmission element with the rear wheel hub. The above-mentioned positive-locking fit established when the tie-rod is under tension and nullified when the tie-rod is released.02-11-2016
20160167731Two-Wheeled Vehicle Having a Sprung Drive-Train Swing Arm06-16-2016

Patent applications in class Rotary crank power

Patent applications in all subclasses Rotary crank power

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