E - Fixed Constructions – 04 – F
Patent
E - Fixed Constructions
04
F
E04F 21/06 (2006.01) B05C 5/02 (2006.01)
Patent
CA 2050000
ABSTRACT OF THE DISCLOSURE The present invention relates to a mortar gun which comprises a substantially vertical hopper adapted to contain mortar and having a front wall, a rear wall and a substantially horizontal bottom wall. A cylinder projects forwardly from the front wall of the hopper adjacent the bottom of the front wall. A conically tapering nozzle extends integrally and forwardly on the cylinder. A worm feed screw rotatably lies along the bottom wall of the hopper from the back wall of the hopper and projects within the cylinder until it reaches the tapered nozzle. The screw has a central axis and a thread integrally mounted on the central shaft. An helicoidally twisted and relatively flat plate of stiff material extends integrally from the thread of the screw into the nozzle. The helicoidally twisted flat plate rotatably lies adjacent the corresponding inner wall of the conical nozzle. The helicoidal flat plate thus defines an unobstructed conical axial passageway leading to a discharge aperture of the front end of the conical tapered nozzle. Upon rotation of the screw, the mortar in the hopper is pushed through the cylinder towards the discharge nozzle by the feed screw. The mortar in the nozzle is pushed through the passageway by the mortar leaving the cylinder and by the helicoidal flat plate which frictionally transmits a forward thrust to the mortar. The plate also scrapres the inner wall of the mortar to prevent the mortar from sticking to it.
Goudreau Gage Dubuc
Jobin Andre R.
LandOfFree
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