The present invention concerns a device (1; 51) for dispensing a fluid (L), having a supporting structure (2) provided with means (3) for coupling to a container (C) containing the fluid (L) and a collapsible chamber (6) associated with the supporting structure (2) and suited to draw and contain a measured quantity of the fluid (L). Said device comprises lever operating means (16) suited to deform the collapsible chamber (6) in order to dispense a portion of the measured quantity. The invention also implements a system for dispensing a fluid (L).

A dispenser for pasty products having a fixed head that has a dispensing duct for dispensing a product, a pump with an elastically deformable cap, a manually-operated actuator, a separating wall with a suction inlet, and a suction valve cooperating with the suction inlet. The suction valve has a valve body and a plurality of tabs that bend and open the suction inlet in a product suction step, and close the suction inlet in a product dispensing step.

A dispensing device for dispensing a fluid is proposed. The dispensing device has a conveying device for conveying the fluid from a container, which can be actuated by means of an actuating lever, the actuating lever being lockable against undesired actuation by means of a locking device. For unlocking, the actuating lever is preferably displaceably mounted. The dispensing device may additionally comprise a securing device which secures the actuating lever against unlocking by means of the locking device. Furthermore, a dispenser for dispensing a fluid with a container and a dispensing device is proposed.

A manually operable head assembly for a dispenser for pasty products which has a fixed head with a dispensing duct for dispensing a product, a pumping unit with an elastically deformable cap, an actuator, a guarantee tab connected to the fixed head and having a tab body, and at least one bridge connected to the actuator is provided. The at least one bridge is suitable for breaking on a first operation of the actuator. The tab body is configured to remain connected to the fixed head following the first operation of the actuator.