Patent application number | Description | Published |
20090105024 | CHAIN TRANSMISSION - A hybrid chain comprises outer links composed of link plates connected in side-by-side relationship by two connecting pins fitted to holes in the outer plates, and inner links composed of link plates in spaced, side-by-side relationship and connected by two bushings on which rollers are mounted, the bushings being fitted to holes in the inner plates. The inner and outer links are connected in alternating, overlapping, relationship, with each pin of an outer link extending through a bushing of an adjacent overlapping inner link. The chain meshes with a sprocket composed of a central sprocket engaged by the rollers, and two side sprockets. The inner link plates, the outer link plates, or both, have two teeth, with outer flanks in the form of arcs each centered on the more remote pin or bushing hole. The inner link plates, outer link plates, or both, can be double-sided link plates. | 04-23-2009 |
20090143178 | SHOCK ABSORBING STRUCTURE IN IDLER - A shock absorbing structure in an idler in which the shock of first abutment of a roller in a roller chain in a case where the roller engages with an idler sprocket, is absorbed or reduced The structure has an idler | 06-04-2009 |
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 |
20090209380 | SPROCKET FOR CHAIN - A sprocket for a chain drive using a roller or bushing chain has a plurality of different pitch angles, including both pitch angles larger than the standard pitch angle, and pitch angles smaller than the standard pitch angle. The number of pitch angles in the sprocket larger than the standard pitch angle is greater than the number of pitch angles in the sprocket smaller than the standard pitch angle. | 08-20-2009 |
20090247337 | CHAIN TRANSMISSION DEVICE - In a chain transmission using a hybrid chain having inner and outer links with bushings, or with bushings and rollers, the rollers mesh with a central sprocket, and the link plates have teeth that function as a silent chain, meshing with side sprockets fixed to the central sprocket. The teeth of the link plates of the inner links have a shape different from that of the teeth of the link plates of the outer links. The outer flanks of the teeth can all have the same shape, and the shape difference can be in the shapes of the inner flanks. | 10-01-2009 |
20090247340 | CHAIN TRANSMISSION DEVICE - In a chain transmission, the link plates of a roller chain or rollerless bushing chain are formed with pairs of teeth. A sprocket has a central set of sprocket teeth for meshing with the rollers or bushings, and sets of side sprocket teeth for meshing with the sprocket. The teeth of the link plates function as a silent chain. After an inner flank of a link plate tooth comes into contact with a side sprocket tooth, a roller and an outer flank of the link plate tooth are seated on the sprocket. | 10-01-2009 |
20090286639 | SPROCKET FOR CHAIN - A sprocket for a chain drive using a roller or bushing chain has a plurality of different pitch angles, including both pitch angles larger than the standard pitch angle, and pitch angles smaller than the standard pitch angle. The number of pitch angles in the sprocket larger than the standard pitch angle is greater than the number of pitch angles in the sprocket smaller than the standard pitch angle. The sprocket teeth are integrally molded with the sprocket by sintering. | 11-19-2009 |
20090286640 | SPROCKET FOR CHAIN - A sprocket of a chain transmission has at least two different pitch angles arranged irregularly in the direction of the circumference of the sprocket's pitch circle. The diameter of the tooth gap bottom circle of the sprocket is larger than the diameter of tooth gap bottom circle of a standard sprocket having the same number of teeth. The teeth are integrally molded as a part of the sprocket by sintering. | 11-19-2009 |
20100137085 | TIMING CHAIN DRIVE SYSTEM - In a timing chain driving system in which the speed of a driving sprocket fluctuates cyclically, the tooth pitch of a driven sprocket from which a tension span of the chain travels toward the driving sprocket varies cyclically around the circumference of the driven sprocket so that the tooth pitch at the point at which the timing chain disengages from the driven sprocket is at a minimum when the rotational speed of the driving sprocket is maximum, moderating fluctuations in chain tension. A similar effect can be achieved in the case of a driving sprocket having a cyclically varying tooth pitch by arranging the driving sprocket so that its tooth pitch is maximum at the point at which it is engaged by the chain when its rotational speed is maximum. | 06-03-2010 |
20100173739 | TIMING CHAIN DRIVING SYSTEM - In a timing chain drive, a hybrid driving sprocket, having roller-engaging teeth and side sprocket teeth, cooperates with a hybrid chain having rollers that mesh with the roller-engaging teeth and toothed link plates that mesh with the side sprocket teeth. A driven sprocket from which the chain travels toward the driving sprocket has a cyclically varying tooth pitch that compensates for tension variations due to cyclic variations in the rotational speed of the driving sprocket or to cyclic variations in the load applied to the driven sprocket. The driven sprocket can be a roller sprocket or a hybrid sprocket having roller-engaging teeth and side sprocket teeth for engagement with the teeth on the link plates of the chain. | 07-08-2010 |
20100216581 | SILENT CHAIN TRANSMISSION - In a silent chain transmission, the distance between the centers of front and rear pin holes of each of the inner link plates of the chain is smaller than the length of the smallest chord obtained by dividing, by the number of sprocket teeth, the circumference of a circle having a radius extending from the center of the sprocket to the center of a pin hole of a link plate of the chain when the last-mentioned link plate is fully engaged with the sprocket. | 08-26-2010 |