Patent ID: 9157246
Filing Date: 2015-10-13
Classification: E04G

Abstract:
1. A mortar gun assembly comprising: a chamber connected at an inlet end to a supply hose to receive fluid material from a remote supply; an extruder at an outlet end of the chamber, said extruder configured to apply the fluid material as a bead or ribbon of selected thickness to a substrate; a pump connected to the supply hose to deliver fluid material from the remote supply to the chamber under pressure; a rotating port valve connected in the supply hose to regulate the flow of said fluid material to the chamber; a handle secured to the top of the chamber to allow a user to manipulate the mortar gun; and a manually operable on/off switch on said handle for controlling said rotatable port valve; wherein said rotatable port valve has a first, or active, state in which the fluid material is pumped from the remote supply to the mortar gun chamber to be extruded onto a substrate through said extruder, and a second, or rest, state in which the fluid material is not sent to the mortar gun, but is instead re-circulated to the supply, wherein said rotatable port valve comprises (a) an annular main body having side and bottom walls and a top cover that is secured to the body by suitable fasteners; (b) first, second and third ports spaced around and extending through the annular body and forming an inlet and two outlet ports; (c) a cylindrical, rotatable valve body rotatably nested in a central opening of the annular main body, and (d) passageways through said rotatable valve body for connecting said inlet passageway selectively to one of said outlet ports in said valve active state to supply said fluid material to said mortar gun and to the other of said outlet ports in said rest state to recirculate said fluid material.