Manual pump type fluid dispenser

A manually actuated pump type fluid dispenser comprising a casing defining an internal cavity and a pump member at least partly located in the cavity, the pump member having a central core and first and second seal members projecting radially outwardly of the core and spaced in an axial direction of the core for contact with the casing to define a pump chamber within the cavity in an area bounded by the first and second seal members, in which a region of the core between the first and second seal members is resiliently deformable from an initial resiliently biased configuration in which the first and second seal members are axially spaced by a first amount and an axially compressed configuration in which the seal members are spaced by a second amount which is less than the first amount to reduce the volume of the pump chamber and wherein the first and second seal members engage about opposing sides of the resiliently deformable region of the core when it is in the axially compressed configuration.