Abstract: To stably maintain an opening degree characteristic of a driven lever, the driven lever (5) is attached to one end (3A) of a main throttle shaft (3) to which a main throttle valve (4) is attached, a cam lever (10) is attached to one end (8A) of a sub throttle shaft (8) to which a sub throttle valve (9) is attached, a cam surface (10A) of the cam lever (10) faces to a roller (5A) of the driven lever (5), a cup-shaped throttle cover (12) is arranged on one side wall (1A) of a throttle body (1), an opening portion (12C) of a throttle cover (12) is closed by a closing cover (20), and a lever storage chamber (22) formed by the throttle cover (12) and the closing cover (20) accommodates the cam lever (10) and the driven lever (5).

Abstract: To stably maintain an opening degree characteristic of a driven lever, the driven lever (5) is attached to one end (3A) of a main throttle shaft (3) to which a main throttle valve (4) is attached, a cam lever (10) is attached to one end (8A) of a sub throttle shaft (8) to which a sub throttle valve (9) is attached, a cam surface (10A) of the cam lever (10) faces to a roller (5A) of the driven lever (5), a cup-shaped throttle cover (12) is arranged on one side wall (1A) of a throttle body (1), an opening portion (12C) of a throttle cover (12) is closed by a closing cover (20), and a lever storage chamber (22) formed by the throttle cover (12) and the closing cover (20) accommodates the cam lever (10) and the driven lever (5).

Abstract: A one-way control valve, comprising a valve body guide hole for receiving a valve body movably in the hole; a fluid feed passage opened through a valve seat at one end of the valve guide hole; a fluid discharge passage opened through a spring retainer stepped portion at the other end of the valve body guide hole; and a coil spring compressed in the valve body guide hole and held at one end to the valve body and at the other end to the spring retainer stepped portion, is provided with a plurality of slit grooves opened at one ends to said spring retainer stepped portion within the hole for receiving the valve body and opened at the other ends to said fluid discharge passage are provided, an outside diameter of a circle on which such one ends of the plurality of slit grooves are opened being greater than an outside diameter of said coil spring, so that a desired flow rate of passing fluid can be secured even when fluid pressure to be fed is increased beyond a predetermined level.