Patent ID: 6823958
Filing Date: 2004-11-30
Classification: B62K

Abstract:
A progressive suspension device (1) for the rear wheel of a motorcycle, comprising:a swinging fork (2) having a first end (3) pivoted at a pin (4) fitted inside at least one first seat (11) made in either an engine crankcase (12) or a motorcycle frame, and a second end (5) that carries an axle (6) of a wheel (7), the fork (2) having a central section (10), provided with a second seat (23) and to which there is connected at least one arm (8, 9) to support the wheel (7); a spring-damper assembly (14) connected at a first end to a support (13) for the central section (10) of the fork (2); a lever (15) having a first end (16), provided with a pivoting axis (16a), the lever (15) being pivotable at the pivoting axis (16a) in at least one third seat (17) made in either the engine crankcase (12) or the motorcycle frame, the lever (15) also having a second end (18), provided with a connecting axis (18a), the lever (15) being operatively connected at the connecting axis (18a) to a second end of the spring-damper assembly (14); a connecting rod (19), of length (C), joining the fork (2) to the lever (15), said connecting rod (19) having a first end (20) operatively connected to the lever (15) at an intermediate point (21) between the first end (16) and the second end (18) of the lever (15), and a second end (22) operatively connected to the second seat (23), said connecting rod (19) comprising means (24) for adjusting a length (C) of said connecting rod (19).