Abstract: In a pump dispenser for dispensing accurate small quantities of a fluid substance, e.g. an ophthalmological substance, comprising a pump body (1), a piston (5) movable between two positions, a suction orifice, and a discharge orifice, the opening through the suction orifice is directly and positively controlled by displacement of the piston using a slide valve type of mechanism, with the discharge orifice being provided with a non-return valve and with the compression chamber of the pump being annular in shape between the piston and the pump body.

Abstract: An operating safety and tamper-proofing device for a spray, the spray being of the type comprising a valve (2) for mounting on a receptacle such as a can, an axial ejection elongate spray head (4) such as a nasal spray with actuator means of the type including two diametrically opposite wings (6) on either side of the spray head for receiving fingers, a protective cap (7), and a sleeve (3) surrounding the valve for determining, together with the spray head and/or the finger-receiving wings, safety means for preventing the spray from operating depending on the angular position of the spray head and/or the finger-receiving wings relative to the sleeve, wherein the finger-receiving wings constitute a part which is independent from the spray head and which is preferably engaged thereon by wedging.