Setting shock absorber for cycles

Claim 1

A setting shock absorber with a manual drive for bicycles and motor-bicycles, having a cycle frame, comprising: a setting device stirruped to the frame including a toothed lever (1) and a steel cable (2) driven thereby; a rotatable bush (3) and a rigid bush (4), said rotatable bush being rotatable in said rigid bush (4), and said steel cable (2) being coupled to said rotatable bush (3); a band spring (6), one end of said band spring 6) being connected to said rotatable bush (3) and the other end of said band spring (6) being connected to said rigid bush (4); said lever (1) through said steel cable (2) rotating said rotatable bush (3) in said rigid bush (4) for rotating a rod (7), and movement of said rotatable bush (3) actuating a screwing or an unscrewing action of said rod (7); said rod having a threaded end (8) which is received into a volute threaded bush (9) for loading or releasing of a spring (10) stabilized between a bearing point (11) and a holed piston (12) having holes (17(; at an end (13) of said piston (12), there is interposed a plastic ring (14) between said holed piston (12) and said spring (10) forming an adjustable shutter for said holes (17); the loading or releasing of said spring (10) to facilitate said plastic ring (14) opening the holes (17) of said holed piston (12) permits oil flow through the hole (17) of said piston (12) for oil crossing flow from a first chamber (15) to a second chamber (16) and from the second chamber (16) to the first chamber (15) and is acted on by air expansion and compression into the second chamber (16) by the oil flow which then flows again into the second chamber (15) passing through said holes (17) of the piston (12) freed by said plastic ring (14) forming said adjustable shutter; said oil flowing from said first chamber (15) to said second chamber (16) passing through two holes (18) fixed in said threaded bush (9), and the oil flows to an adjustable flow through said two holes (18) under the control thereof and pushes said holed piston (12) and said holes (17) being occluded by said plastic ring (14); said piston (12) being under control of said spring (10) in bearing onto said bearing point (11), and being pushed beyond an end (19) of said threaded bush (9); said toothed lever (1) being connected with a setting block (26) provided with a holder (27) for supporting said lever to said cycle frame; and an air input control valve (28) provided with a pre-arranged register value scale and responsive to said bush (3), said valve (28) being actuated by a damping effect setting for control of air input acting on the oil compression.