Patent ID: 8590750

Claim:
A fluid delivery device for discharging a fluid comprising: a housing; a piston pump; a biasing mechanism; and a trigger mechanism; the housing comprising an outlet for discharging the fluid; the piston pump comprising a casing defining a pump chamber for storage of the fluid, a piston slidably movable relative to the pump chamber, a piston plunger, and a delivery channel for delivering fluid discharged from the pump chamber to the outlet of the housing; the biasing mechanism acting on the casing of the piston pump to bias the casing towards the outlet of the housing; the trigger mechanism comprising a catch member on or connected to the casing of the piston pump and a restraining member which is movable by a manually actuatable trigger; the trigger mechanism being movable on operation of the manually actuatable trigger from a cocked configuration to a triggered configuration; wherein in the cocked configuration the restraining member is engaged with the catch member to prevent movement of the casing towards the outlet of the housing so as to prevent discharge of fluid from the pump chamber; and wherein in the triggered configuration the restraining member is disengaged from the catch member to enable movement of the casing towards the outlet of the housing under action of the biasing mechanism so as to discharge fluid from the pump chamber, along the delivery channel and out of the outlet of the housing.