Class / Patent application number | Description | Number of patent applications / Date published |
474141000 | PULLEY HAVING CIRCUMFERENTIALLY SPACED PORTIONS OF DRIVE FACE SPACED UNEQUAL DISTANCES FROM PULLEY AXIS OF ROTATION (E.G., ELLIPTICAL PULLEY, ETC.) | 14 |
20080200293 | Sprocket With 1.5 Order, and Multiples Thereof, Vibration Canceling Profile and Synchronous Drive Employing Such a Sprocket - A vibration canceling rotor and a synchronous drive employing such rotors is provided wherein 1.5 order vibrations in the synchronous drive can be reduced by employing the vibration canceling rotor on a rotating member of the synchronous drive that rotates at one half the speed of another rotating member of the drive. To cancel 1.5 order vibrations, the rotor has a three-lobed non-circular radial profile to engage the continuous-loop elongate drive structure of the synchronous drive. To cancel 1.5 order and | 08-21-2008 |
20090054187 | CHAIN DRIVE AND USE OF A CHAIN IN A CHAIN DRIVE - A chain drive is provided including a plurality of shafts ( | 02-26-2009 |
20090149287 | Non-circular rotary component - A rotary component with a rotor having a plurality of teeth arranged around the perimeter of the rotor. Each tooth has a crown and each pair of adjacent teeth has a valley therebetween. The crowns of the teeth lie on a curved envelope forming the perimeter of the rotor. The perimeter of the rotor has a non-circular profile with at least two protruding portions alternating with receding portions, in which the distance between the midpoints of the crowns of each pair of adjacent teeth is substantially the same, the profile of the valley between each pair of adjacent teeth is substantially the same, and the distance between the midpoint of each crown and the axis of the rotor varies around the perimeter to produce the said non-circular profile. | 06-11-2009 |
20090170648 | TIMING CHAIN DRIVE UNIT - In a timing chain drive unit the tooth pitch of a driven sprocket from which a tension span of the chain travels toward a driving sprocket varies cyclically around the circumference of the driven sprocket and cyclically increases and decreases the length of the tension span in synchronism with load variations imparted to the driven sprocket by a valve-operating camshaft. | 07-02-2009 |
20090253542 | ROTARY DISC - The configuration of teeth ( | 10-08-2009 |
20100041501 | NON-POSITIVE CONTINUOUSLY VARIABLE TRANSMISSION WITH OUT-OF-ROUND ROTARY DISK - A continuously variable transmission for transmitting torque with at least one input shaft introducing torque into the continuously variable transmission, with at least one further shaft, to which the torque is to be transmitted, and a force-transmitting endless element, which has a non-positive connection to the at least one input shaft and the at least one further shaft. A connection between either the at least one input shaft or the at least one further shaft and the force-transmitting endless element is provided by a rotary disk ( | 02-18-2010 |
20100160100 | SYNCHRONOUS DRIVE APPARATUS - A synchronous drive apparatus that includes a continuous loop elongate drive structure and first and second driven rotors that are configured to cooperate with the continuous loop elongate drive structure to generate first and second opposing fluctuating corrective torques, respectively, that are configured to at least partly counteract first and second periodic fluctuating load torques, respectively. | 06-24-2010 |
20100197433 | Synchronous Drive Apparatus and Methods - A synchronous drive apparatus includes first and a second rotors. The rotors have multiple teeth for engaging engaging sections of an elongate drive structure. A rotary load assembly couples to the second rotor. The elongate drive structure engages about the rotors. The first rotor drives and the second rotor is driven by the elongate drive structure. One of the rotors has a non-circular profile having at least two protruding portions alternating with receding portions. The rotary load assembly presents a periodic fluctuating load torque when driven in rotation. The angular positions of the protruding and receding portions of the non-circular profile relative to the angular position of the second rotor, and the magnitude of the eccentricity of the non-circular profile, are such that the non-circular profile applies to the second rotor an opposing fluctuating corrective torque which reduces or cancels the fluctuating load torque of the rotary load assembly. | 08-05-2010 |
20100317475 | CHAIN GUIDE MOUNT FOR A BICYCLE - A chain guide mount is adapted to be attached on a bicycle having a frame including a bottom bracket shell. A bottom bracket sleeve is position in the shell, and the sleeve includes a first anti-rotation feature. The chain guide mount has mounting locations for attachment of a chain guide, and further has a second anti-rotation feature engaging the first anti-rotation feature to thereby inhibit rotation of the chain guide mount relative to the sleeve. In one embodiment, the sleeve includes a cylindrical part position in the shell and a flange positioned outside the shell. In order to insure proper rotational orientation of the chain guide mount, the first and second anti-rotation features are preferably asymmetrically positioned around a bottom bracket axis defined by the bearing. In addition, a first alignment feature is provided on the frame, and the sleeve includes a second alignment feature engaging the first alignment feature. | 12-16-2010 |
20110028254 | BELT DRIVE - A belt drive is provided, especially a timing-belt drive for an internal-combustion engine, with a driving gear of a driveshaft, at least one driven gear of a driven shaft, and a belt means, wherein the driving or the driven gear imparts additional irregularity to the belt drive due to its noncircular shape and its phase position, which leads to stable running of the belt means. A noncircular gear that can be mounted easily and in phase, as well as with a fixed position, is realized in that the driving or driven noncircular gear has in its in-phase rotational position a rotationally fixed connection to its driving or driven shaft. | 02-03-2011 |
20130281239 | ATTACHMENT OF AN OVOID CHAINRING - This invention is applicable to bicycle non-circular chainrings or ovoid chainrings, attachable to a drive crank arm with a spider, forming a structure with anchorage points distributed in a star like shape; the said ovoid chainring ( | 10-24-2013 |
20140221139 | ASYMMETRIC ELLIPTICAL CHAIN GEAR FOR A BICYCLE - According to the present invention, an asymmetric elliptical chain gear ( | 08-07-2014 |
20150148161 | NON-CIRCULAR ROTARY COMPONENT - A rotary component is provided, including a body that has a non-circular periphery and a plurality of teeth positioned about the periphery of the body. The non-circular periphery of the body causes variation in the tension generated in an endless drive member engaged with the rotary component during rotation of the rotary component about an axis. A valley separates each tooth from each adjacent tooth. At least one of the width of each valley and the tooth pitch is generally related to the amount of tension generated in the endless drive member during rotation of the rotary component about the axis at a time when the valley receives a belt tooth. In a preferred embodiment, both the valley width and the tooth pitch are generally related to the amount of tension generated in the endless drive member during rotation of the rotary component about the axis at a time when the valley receives a belt tooth. | 05-28-2015 |
20160052596 | CHAINRING - A bicycle chainring includes a plurality of teeth extending from a periphery of the chainring wherein roots of the plurality of teeth are disposed adjacent the periphery of the chainring. The plurality of teeth include a first group of teeth and a second group of teeth, each of the first group of teeth wider than each of the second group of teeth. At least some of the second group of teeth are arranged alternatingly and adjacently between the first group of teeth, and wherein the periphery of the chainring is generally non-circular. | 02-25-2016 |