Abstract: A decompression device for suction pumps having a pumping chamber and a plunger formed with a resilient lower lip, which in the end-of-stroke position reaches a lower limit level and which comprises at least one protuberance in the surface of the pumping chamber extending on both sides of the lower limit level and determining a lower edge and an upper edge, between which at least one continuous slot extends.

Abstract: A dispensing pump for a fluid in a container, in which the component parts form two units which are functionally joined together by a coupling member, while being easily separable. The component parts of each unit are non-separably assembled together. The second unit includes a valve for communication with the container and is inseparably attached to the container and is further provided with a device restraining access to the valve, whereby this second unit acts as a seal for the container. The first unit comprises a cylinder, piston, actuator spring and a communication passage with the external environment and can be attached to successive second units.