Patent CZ-300199-B6 (CZ)
Title: Bicycle driven by swinging motion of arms together in front of the body
Inventor: VACEK MIROSLAV
IPC: B62M1/00
Filed: 2007-10-29
Abstract: The present invention relates to a bicycle driven by swinging motion of arms together in front of the body consisting of a bicycle frame (1), a front fork (4) rotatable along with a front wheel (5), a rear fork (3) fixedly attached to a rear wheel (6), a seat (7) with a backrest and a foot rest (8). The bicycle further comprises a lever, steering and stabilizing mechanisms, whereby the lever mechanism includes a gearbox (10) being adjustable for height by a saddle attachment (27) and having a lever shaft (11), a countershaft (12) and an output shaft (13) carried on both sides in slide bushings in sides of a housing (14). In said lever shaft (11) middle section, there are fastened right-handed freewheels (15a, 15b) being each in opposite direction of engagement coupled by its inner static section and its outer rotary section with a corresponding lever toothed wheel (16a, 16b) of different size. A right-hand lever (17a) and a left-hand lever (17b) coupled with each another by a two-part sleeve in a single lever (17) are attached to ends of the lever shaft (11) outside the housing (14). In the middle section of the countershaft (12), there is secured an intermediate toothed wheel (18), and in the output shaft (13) middle section, there are secured two output toothed wheels (19a, 19b) of different size such that the toothed wheels on shafts engage with each other. In a bicycle with a rear wheel (6) engagement, a toothed plate (20), connected by a link chain (21) with a chain sprocket (22) at the left-hand end of an axis mounted in a bearing sleeve of a transmission center (23) in the frame (1) is fixedly coupled to the left-hand end of the output shaft (13) outside the housing (14) wherein said axis right-hand end is fixedly coupled with at least one toothed plate (24) connected by a link chain (25) with at least one chain sprocket (26) mounted on the rear wheel (6) hub. In a bicycle with a front wheel (5) engagement, at least one toothed plate (24) connected by a link chain (25) with at least one chain sprocket (26) mounted on the front wheel (5) hub is secured to the output shaft (13) right-hand end, outside the gearbox (10). In a bicycle with a rear wheel (6) engagement, the outer part of a steering handlebars head (30) is rotatably mounted on the lever mechanism lever (17) wherein handlebars are attached to said outer part upper end while steering arms (30a, 30b) are attached in pone plane to said outer part lower end. Swing joints (31a, 31b) coupled by means of length adjustable pull rods (34a, 34b) with springs defining steering clearance, with swing joints (32a, 32b) rotatably mounted at the ends of front handlebars (33) coupled with the front fork (4) are rotatably mounted at the ends of the steering arms (30a, 30b) at the level of the lever shaft (11) axis. In a bicycle with a front wheel (5) engagement, the handlebars (9) are coupled with the lever mechanism levers (17a, 17b), the gearbox (10) is adjustably attached to a handlebar adapter (29) secured in the front fork (4) and a left-hand camber enabling right turning is performed in the place of the link chain (25) guide in the frame (1) while in the foot rest (8) holder there are mounted rotary limiter (81a, 81b) of side steering. The stabilizing mechanism has an extensible undercarriage with two arms (41a, 41b) having their one ends attached to free ends of an axis carried in the frame (1) center (40) bearing sleeve wherein each arm (41a,41b) is provided at its other end with a lever lift and a wheel (44a, 44b), rolling on an axis. The arms (41a, 41b) are fixedly coupled with each another by a detachable stiffener (42) of tubular form with two rings mounted slidably side by side thereon. One of said rings being coupled with one end of an extension spring (43) having its other end attached to the frame (1), while the other ring is coupled with one end of an adjustable pull rod (46) having its other end coupled by means of a pin with a hand lever (45) with a stop pawl attached to the frame (1). Each lever lift has an inside bushing (50a, 50b) being connected with a ratchet wheel (51a, 51b) with engagement direction counter driving direction, being connected by its inner static part and its outer rotary part with at least one bearing lever (52a, 52b). An outside bushing (53a, 53b) being connected with a ratchet wheel (54a, 54b) with engagement direction with driving direction is mounted on said inside bushing (50a, 50b). Said ratchet wheel (54a, 54b) inside static part and outside rotary part being coupled with lifting fixed or telescopically extensible lever (55a, 55b), which are secured during drive along with said bearing levers (52a, 52b) by attachments to the holder (56).