Abstract: A bicycle gearshift including a first body associated with a bicycle frame, a second body connected to, and moveable relative to, the first body, a rocker arm rotatably connected to the second body at a rotation axis, and a shaft extending coaxially to this axis and fixedly associated with the rocker arm. A unidirectional rotation device is arranged between the shaft and second body to allow rotation of the shaft relative to the second body only in a first rotation direction. An elastic element is associated with the second body and the rocker arm to push the rocker arm in rotation about the axis in the first rotation direction. A damping device is arranged between the shaft and unidirectional rotation device to generate a friction force when the rocker arm is rotated in a second, opposite rotation direction, and has a friction surface in contact with the unidirectional rotation device.

Abstract: A bicycle gearshift including a first body associated with a bicycle frame, a second body connected to, and moveable relative to, the first body, a rocker arm rotatably connected to the second body at a rotation axis, and a shaft extending coaxially to this axis and fixedly associated with the rocker arm. A unidirectional rotation device is arranged between the shaft and second body to allow rotation of the shaft relative to the second body only in a first rotation direction. An elastic element is associated with the second body and the rocker arm to push the rocker arm in rotation about the axis in the first rotation direction. A damping device is arranged between the shaft and unidirectional rotation device to generate a friction force when the rocker arm is rotated in a second, opposite rotation direction, and has a friction surface in contact with the unidirectional rotation device.

Abstract: A crutch (10) for orthopaedic or similar purposes which can be used with the arms to support the body and/or the legs, the crutch (10) being equipped with a semicircular element (13) which in turn presents two wings (14, 15) facing the front part of the crutch according to the usual forms currently in use, the crutch being fitted, at the ends of the two wings (14, 15) of the semicircular element (13), with a strap (16) of appropriate length and shape to allow the forearm to be restrained in the semicircular support element (13).

Abstract: A crutch (10) for orthopaedic or similar purposes which can be used with the arms to support the body and/or the legs, the crutch (10) being equipped with a semicircular element (13) which in turn presents two wings (14, 15) facing the front part of the crutch according to the usual forms currently in use, the crutch being fitted, at the ends of the two wings (14, 15) of the semicircular element (13), with a strap (16) of appropriate length and shape to allow the forearm to be restrained in the semicircular support element (13).

Abstract: A device to be attached to the air-fuel inlet manifold of internal combustion engines. In particular on the carburetor inlet manifold and connected to the oil sump to convey oil saturated air that is then mixed with the inlet air of the engine. It improves the combustibility of the air-petrol (fuel) mixture resulting in an increase in engine efficiency.