Patent ID: 6244610
Filing Date: 2001-06-12
Classification: B62K

Abstract:
A two-wheeled vehicle comprising:a frame (1) having a wheel support member (4) at the rear of said frame (1);a drive chain (2) supported by a bearing at a lower end of said frame (1);a rear wheel (5) spring-supported at said wheel support member (4);a first lever (7) rotatably mounted by a first rotary bearing (8) at said frame (1) and by a second rotary bearing (9) at said wheel support member (4), wherein said first lever (7) moves beneath said wheel support member (4);a second lever (10) rotatably mounted at an upper end portion of said wheel support member (4) and said frame (1), respectively;a spring element (13) rotatably mounted at said frame (1) and one of said levers;wherein said second rotary bearing (9) is positioned above an axle (6) of said rear wheel (5) and is positioned at said wheel support member (4), when viewed from said axle (6) of said rear wheel (5) toward a front end of said vehicle, at a location of between 0.045 to 0.8 times the length of said wheel support member (4)from said axle of said rear wheel;wherein the axle (6) of said rear wheel (5), upon spring compression movement, produces a trajectory of movement which is substantially circular.