Abstract: A dispensing device is described which is a pump for dispensing accurately metered amount of fluids in the form of a spray. The device has a piston sliding in a cylinder. A fluid inlet to the cylinder is normally closed off by a ball valve and, when open, communicates with an outlet passage leading to a swirl chamber and outlet nozzle. Cooperating first and second cam surfaces are provided on parts fixed to the cylinder and piston respectively so that relative rotational movement of the cam surfaces causes the piston to slide in the cylinder, the stroke being fixed by the profiles of the cam surfaces.

Abstract: An apparatus for injecting gas under pressure into liquid held in a bottle 5, primarily for injecting carbon dioxide gas into beverages in order to make "fizzy" drinks in the home or other small establishments, comprises a base member 1 including a platform 4 to support the bottle. A housing member 2 is pivoted to the base member about a generally horizontal axis 3 spaced horizontally from the platform so that when the apparatus is opened the bottle can be placed upon, or removed from, the platform. When the apparatus is closed, a dip tube 9 penetrates through the open top of the bottle to permit the injection of gas from a cylinder housed within the base member under the control of a lever 11.