Drench gun

Claim 1

A drench gun to deliver a dosage of drench into the mouth of a beast, said gun including a generally "U" shaped nozzle having a first extremity to be engaged within the mouth of the beast, a conduit having a first end portion attached to the other extremity of said nozzle and a second end portion extending therefrom in the general direction of extension of said first extremity, a hollow cylinder mounted on and encompassing said first end portion said conduit so as to be co-axial and co-extensive therewith, said cylinder being closed at one end and open at the other end which is located nearer said nozzle than said closed end, a piston slidably mounted on the conduit and slidably engaged within the cylinder so as to define within the cylinder a variable volume working space, biasing means biasing the piston towards the open end of said cylinder a sleeve fixed to the piston and slidably mounted on said conduit and extending from within said cylinder, handle means rigidly attached to said sleeve and extending laterally therefrom enabling it to be gripped by a user of the gun to vary the volume of said space by moving said piston, means for connecting said first end portion of said conduit to a supply of drench, said conduit having an opening providing communication between the interior of said conduit and said space, and valve means restricting movement of drench through said conduit so that the drench exits from said nozzle.