Spraying device apparatus
A unit for spraying including a spraying unit adapted to be removably coupled to a spraying handle. The spraying unit comprising a media tank, an air chamber, a nozzle with a needle and an air intake. The unit for spraying capable of spraying media.
1. A unit for spraying comprising:
a spraying unit adapted to be engaged and disengaged from a spraying handle as a single removable unit, the spraying unit comprising a media tank for holding media, a valve for sealing the media within the media tank, an air chamber for receiving pressurized air, a nozzle, a needle, a liquid tube and a loop directly attached to a rear end and above a centerline of the needle, the needle passing through the media tank and the liquid tube, the media being conducted from the media tank to the nozzle through the liquid tube, the loop adapted to be removably coupled to a trigger assembly of the spraying handle, the unit for spraying capable of spraying the media,
wherein the media and the pressurized air are mixed at an opening of the nozzle when the needle is actuated allowing the media to be pulled from the liquid tube into an air how of the air chamber due to the Venturi effect.
2. The spraying apparatus of claim 1 wherein the spraying unit is removably coupled with the spraying handle defining a predefined configuration of the unit for spraying.
3. The spraying apparatus of claim 1 wherein the spraying unit sprays a foundation media in atomized form through the nozzle.
4. The spraying apparatus of claim 1
wherein the trigger assembly controls a flow of the media being sprayed from the nozzle by pressing a trigger.
5. The spraying apparatus of claim 1 further comprising: a plurality of spraying units identical to the spraying unit.
6. The spraying apparatus in claim 1 wherein the valve is a one way valve that is adapted to receive air in the tank.
7. The spraying apparatus in claim 1 wherein a front end portion on the needle is located in the nozzle and the rear end of the needle is securely coupled with the loop.
8. The spraying apparatus in claim 1 wherein the air chamber receives the liquid tube along a longitudinal axis.
9. The spraying apparatus in claim 1 wherein the liquid tube has a front end and a rear end approximately coaxial with the air chamber.
10. The spraying apparatus in claim 9 wherein the needle passes through the liquid tube towards a tapered opening in a front end of the liquid tube.
11. The spraying apparatus in claim 10 wherein the front end of the liquid tube is tapered internally in accordance with a tapered pointed portion of the needle so that the liquid tube is closed by the tapered pointed portion of the needle.
12. The spraying apparatus in claim 11 wherein, in the first position, the tapered pointed portion of the needle is positioned so that the opening of the liquid tube is completely closed.
13. The spraying apparatus in claim 1 wherein, in a second position, the needle moves longitudinally backwards to allow discharge of the media through the liquid tube.