Patent ID: 8607824

Claim:
A dispenser comprising: a handle housing a valve; a cylinder secured with respect to the handle; a piston moveable inside the cylinder, the piston dividing the cylinder into a front chamber and a rear chamber; and a rod arranged to move with the piston, the rod extending from the piston through an aperture in a front end of the cylinder, wherein the valve comprises a body and first and second independently moveable members linked to an actuation arrangement for controlling advance and retreat of the rod by actuation of a respective one of the first and second members, the actuation arrangement comprising a first trigger and a second trigger, wherein the first member is mechanically linked to the first trigger and the second member is mechanically linked to the second trigger, the body defining a valve chamber and first, second, third, fourth and fifth ports into the valve chamber, the second and fourth ports being connected to, respectively, the rear and front chamber and the first and second members being moveable within the valve chamber to selectively open and close fluidic communication paths between the ports, the first member being movable between two positions to selectively enable fluidic communication between the second port and either the first port or the third port, the second member being movable between two positions to selectively enable fluidic communication between the fourth port and either the third port or the fifth port, and wherein the first and second members are constrained to move along the same axis.