Nozzle devices

A pump-action nozzle device adapted to be fitted to an opening of a container so as to enable fluid stored in said container to be dispensed, said device having a body which defines an internal chamber, said device also having an inlet through which fluid may be drawn into said chamber and an outlet through which fluid present in the chamber may be expelled from the device, said outlet comprising an outlet orifice and a fluid passageway connecting the chamber with the outlet orifice, said device comprising an inlet valve adapted to only permit fluid to flow into the chamber through the inlet when the pressure within the chamber falls below the pressure within the interior of the container to which the device is attached by at least a predetermined minimum threshold amount and said device comprising an outlet valve configured to only permit fluid to flow out of the chamber and be expelled from the nozzle when the pressure within the chamber exceeds the external pressure at the outlet by at least a predetermined threshold amount, wherein the body includes two parts which between them define the internal chamber and at least part of the outlet passageway, and wherein at least a portion of a first one of the two parts of the body which define said chamber is configured to:

• (a) resiliently deform from an initially resilient biased configuration to a distended or deformed configuration in response to the application of a pressure, whereby the volume of said chamber defined by said portion of the body is reduced as said portion of the body is deformed from said initial configuration to said distended or deformed configuration, said reduction in volume causing the pressure within the chamber to increase and fluid to be ejected through the outlet;
• and
• (b) subsequently return to its initial resiliently biased configuration when the applied pressure is removed, thereby causing the volume of the chamber to increase and the pressure therein to fall such that fluid is drawn into the chamber through the inlet valve;
• and
• characterized in that said deformable portion of the first part of the body is non-planar when in its initial resiliently biased configuration and in that the second of said parts of the body has a non-planar region which defines the internal chamber together with the deformable portion, the nozzle device further comprising a trigger actuator having a trigger handle that is adapted to be pulled by an operator to actuate the device and an engagement portion configured to engage said deformable portion and cause it to deform from its resiliently biased position towards the non-planar region of the second of said parts of the body when said trigger handle is pulled.