| 摘要 |
1. Bicycle and like, having a rear wheel (22) or flywheel, and provided with a pedal group comprising a central shaft and a gear wheel (5) integrally coupled each other, a left crank (1) and a right crank (1), coupled on the two ends of the central shaft, characterised in that a pedal crank (7) is rotatably coupled with each one of said left and right cranks (1) by mechanical means (6, 8, 10) creating a freewheel like mechanism between the crank (1) and the corresponding pedal crank (7), a pedal (12) being coupled with one end of each one of the two pedal cranks (7). 2. Bicycle and like according to claim 1, characterised in that said rotating coupling mechanical means between the crank (1) and the corresponding pedal crank (7) comprises a shaped pin (6), provided with a ring gear (10) and rotatably coupled with the crank (1) or with the pedal crank (7), said pin (6) coupling with a corresponding shaped hole (8) provided in the pedal crank (7) or in the crank (1). 3. Bicycle and like, having a rear wheel (22) or a flywheel, and provided with a pedal group comprising a central shaft (14) and a gear wheel (5) integrally coupled each other, a left crank (16) and a right crank (16), characterised in that said left crank (16) and right crank (16) are rotatably coupled with the central shaft (14) by mechanical means (15, 16, 19) creating a freewheel like mechanism between each crank (16) and the central shaft (14), a pedal (12) being coupled with one end of each one of the two pedal cranks (16). 4. Bicycle and like according to claim 3, characterised in that said rotating coupling mechanical means between each one of the cranks (16) and the central shaft (14) comprises a gear (18) coupled with the crank (16), or to the end (15) of the central shaft (14), and provided with a shaped hole (19) within which the corresponding end (15) of the central shaft (14), or a corresponding crank (16) pin, is inserted. 5. Bicycle and like according to each one of the preceding claims 1 - 4, characterised in that the central shaft (14) of the pedal group, which is placed parallel with respect to rear wheel (22) hub (23), is provided externally, above, with respect to the circumference of said rear wheel (22), within an angle (α) between +- 30 degree with respect to the line (h) passing through the contact point between the wheel (22) and the ground and the hub (23). 6. Bicycle and like according to claim 5, characterised in that the rear wheel (23) or flywheel hub is connected with the central shaft (14) of the pedal group by at least a rod (25). 7. Bicycle and like according to claim 6, characterised in that it provides at least a further rod (26) connecting the central shaft (14) of the pedal group with the seat supporting rod (27), said at least a further rod (26) being included within an angle (β) between +- 40 degree with respect to a line parallel to the ground and passing through the central shaft (14) of the pedal group. 8. Bicycle and like according to one the claims 6 or 7, characterised in that it provides at least a further rod (28) connecting the rear wheel (22) or flywheel hub (23) with the lower end of the seat supporting rod (27), the angle (y) between said at least a further rod (28) and the line (h) perpendicular to the ground and passing through the rear wheel (22) or a flywheel hub (23) being between 60 degree and 120 degree . 9. Fixed bicycle provided with a pedal group operating a rear wheel (38) or a flywheel, and comprising a central shaft and a gear wheel (5) integrally coupled, characterised in that it comprises two tanks (30), suitable to contain liquid (31), within each of them a pedal (12) of the pedal group being submerged, within each of the two tanks (30) a cylinder (32) provided with shaped blades (33) and protected by a protection grid (34) being provided, the two cylinders (32) being integrally coupled each other by a shaft (35) inserted within two sealed through holes (36) provided on the faced walls of the two tanks (30), the shaft (35) centrally providing a bigger diameter disc (37) contacting the rear wheel or a flywheel (38). 10. Fixed bicycle according to claim 9, characterised in that each one of the two tanks (30) provides a liquid (31) return chute (39). 11. Fixed bicycle according to claim 9 or 10, characterised in that the pedal group is one of those according to claims 1 - 5. 12. Bicycle or like, provided with at least one seat coupled with a supporting rod, characterised in that said at least one seat is a swinging seat (40) having a foot (41) pivoted on the head (42) of the supporting rod (27), the foot (41) being shaped in such a way to provide two surfaces (43, 44) interacting with two mating surfaces (45, 46) of a head (42) projection (47) to limit the foot rotation with respect to the supporting rod (27) head (42), elastic means (48, 55) being connected with the seat (40) and the supporting rod (27). 13. Bicycle according to claim 12, characterised in that said at least one swinging seat (40) comprises a front bodice (49) to support the user bust, said bodice (49) being provided with elastically swinging means. 14. Bicycle according to claim 13, characterised in that the front bodice (49) provides a rod (50), pivoted on the head (42) of the supporting rod (27) and/or on the foot (41) of the seat (40) by said elastically swinging means. 15. Bicycle according to claim 13 or 14, characterised in that said elastically swinging means are provided with adjustable friction means able to vary the elastic resistance opposed by the front bodice (49) to the weight of the supported bust. 16. Bicycle according to each one of the preceding claims 12 15, characterised in that said at least one swinging seat (40) provides sliding means (52) to adjust the seat (40) along the longitudinal direction of the bicycle and/or telescopic means (53) to adjust the height and the longitudinal inclination of the seat (40) and/or articulation means (54) to adjust the transverse inclination of the seat (40). 17. Bicycle according to each one of the preceding claims 12-15, characterised in that said at least one swinging seat (40) provides a rear equaliser (56) to support the user bust, said equaliser (56) being provided with elastically swinging means. 18. Bicycle according to claim 17, characterised in that the rear equaliser (56) is connected with the seat (40) and/or with the supporting rod (27) by elastically swinging means. 19. Bicycle according to claim 17 or 18, characterised in that said elastically swinging means provide quick release means. 20. Bicycle according to each one of the preceding claims 17-19, characterised in that said elastically swinging means provide adjustable friction means capable to vary the elastic resistance opposed by the equaliser (56) to the user bust. |
