A dispenser for doses of liquid or paste substances

Abstract

A dispenser (100) for doses of liquid or pasty substances (1) having a receptacle (2) for storing the substance to be dispensed and a piston (4) telescopically fitted into the receptacle (2), the piston being prevented from rotating by an anti-rotation mechanism (5) and threaded into a rotating sleeve (3) about an axis of rotation (x). The dispenser has an actuator (6), manually operable for its displacement, and transmission means (7) connecting the actuator (6) to the rotating sleeve (3).The actuator (6) is movable back and forth in a first (A) and a second (B) direction of movement, respectively, between two stroke stops; and the transmission means (7) comprise a pushing part (71) in the actuator (6) and a pushed part (72) in the rotating sleeve (3), configured so that the pushed part (72) is pushed with a component that causes the rotating sleeve (3) to rotate in the direction that displaces the piston (4) against the substance stored in the receptacle (2) when the actuator (6) is moved between its stroke stops both forward and backward.