A disposable cartridge assembly for use with a paint spray gun is disclosed, being made out of an inexpensive material, such as plastic, wherein the paint flows into the cartridge assembly and is sucked out of the tip of the cartridge assembly by the force of pressurized air flowing around the cartr
A disposable cartridge assembly for use with a paint spray gun is disclosed, being made out of an inexpensive material, such as plastic, wherein the paint flows into the cartridge assembly and is sucked out of the tip of the cartridge assembly by the force of pressurized air flowing around the cartridge assembly and past the cartridge assembly fluid spray tip opening, thereby atomizing the paint, allowing for an even application of the paint onto a working surface, such as an automobile body. The inexpensive material allows the cartridge to be disposed of after use, rather than cleaned. Further, keeping the paint within the cartridge assembly and away from any inner workings of the paint spray gun reduces or eliminates the need to clean the spray gun after use.
대표청구항▼
1. A spray gun having a body, the spray gun comprising: a device comprising: a removable cartridge assembly sized and dimensioned to be releasably insertable within the spray gun body, the cartridge assembly including: a spray needle having a spray end and a control end;a one piece reservoir for rec
1. A spray gun having a body, the spray gun comprising: a device comprising: a removable cartridge assembly sized and dimensioned to be releasably insertable within the spray gun body, the cartridge assembly including: a spray needle having a spray end and a control end;a one piece reservoir for receiving and containing a liquid to be sprayed, the reservoir integrally including: a spray liquid chamber for containing a supply of liquid to be sprayed;a spray opening to permit the liquid to be sprayed to pass out of the reservoir, andan open end opposite the spray opening,an inlet for admitting the liquid to be sprayed into the spray liquid chamber;a biasing element arranged inside the spray liquid chamber and positioned to bias the needle to pass through the spray opening to control flow of the liquid to be sprayed out of the reservoir; anda seal situated between the biasing element and the exterior of the reservoir at the open end opposite the needle opening to prevent flow of fluid out of the reservoir;an air inlet port;a nozzle; anda chamber disposed within the body, the chamber sized and dimensioned to releasably admit insertion of at least a portion of the cartridge assembly, wherein when the device is inserted into the body of the spray gun, a space is formed between the body of the spray gun and the cartridge assembly allowing pressurized air to flow around and past the cartridge assembly to exit through the nozzle together with the spray liquid from the reservoir. 2. The device of claim 1, wherein the biasing element of the removable cartridge assembly is configured to surround the needle inside of the reservoir. 3. The device of claim 2, wherein the needle further comprises an annular groove arranged between the spray end and the control end. 4. The device of claim 3, wherein the cartridge assembly further includes an e-clip fastened around the needle in the annular groove, and wherein the biasing element is a spring, the e-clip thereby positioned to connect an end of the spring to the needle. 5. The device of claim 1, wherein at least one of the reservoir and the needle are fabricated with plastic. 6. A spray gun having a body, the spray gun comprising: a device comprising: a removable cartridge assembly sized and dimensioned to be releasably insertable within the spray gun body the cartridge assembly including: a spray needle having a spray end and a control end;a one piece reservoir for receiving and containing a liquid to be sprayed, the reservoir integrally including: a spray liquid chamber for containing a supply of liquid to be sprayed;a spray opening to permit the liquid to be sprayed to pass out of the reservoir, andan open end opposite the spray opening,an inlet for admitting the liquid to be sprayed into the spray liquid chamber;a biasing element arranged inside the spray liquid chamber and positioned to bias the needle to pass through the spray opening to control flow of the liquid to be sprayed out of the reservoir; anda seal situated between the biasing element and the exterior of the reservoir at the open end opposite the needle opening to prevent flow of fluid out of the reservoir;an air inlet port;a nozzle;a chamber disposed within the body, the chamber sized and dimensioned to releasably admit insertion of at least a portion of the cartridge assembly; anda trigger connectable to the control end of the needle when the cartridge assembly is inserted into the gun body, the trigger thereby movable to slide the needle within the reservoir and to permit pressurized air to flow through the spray gun body around the inserted cartridge assembly. 7. A spray gun comprising: a housing including a chamber;a removable cartridge assembly sized and dimensioned to be releasably insertable within the chamber, the cartridge assembly including: a spray needle having a spray end and a control end;a one piece reservoir for receiving and containing a liquid to be sprayed, the reservoir integrally including: a spray liquid chamber for containing a supply of liquid to be sprayed,a first opening cooperative with the spray end of the needle to permit the liquid to be sprayed to pass out of the reservoir,a second opening opposite the needle opening through which the needle control end passes, anda third opening for admitting the liquid to be sprayed into an interior of the reservoir;a biasing element arranged inside the spray liquid chamber and positioned to bias the needle to engage the spray tip opening to control flow of the liquid to be sprayed out of the reservoir; anda seal positioned between the biasing element and an exterior of the reservoir at the second opening, the needle passing through the seal.a trigger for controlling a position of the needle to thereby control an amount of pressurized air flowable into the spray gun; anda lever connected to the trigger and connectable to the control end of the spray needle when the cartridge assembly is inserted into the housing, wherein when the trigger is moved the needle is slid between a rest position wherein the spray end is seated within the spray tip opening, to an active position wherein the spray end is at least partially withdrawn from the spray tip opening thereby allowing liquid to be sprayed to pass through the spray tip opening. 8. The spray gun of claim 7, wherein the biasing element is a spring which is connected to the needle and surrounds the needle inside of the reservoir. 9. The spray gun of claim 8, wherein the spring is connected to the needle by an e-clip fastened around the needle in within an annular groove. 10. The spray gun of claim 7, wherein at least one of the reservoir and the needle are fabricated with plastic. 11. The spray gun of claim 7, further including an end cap releaseably positionable within the second opening and including a bore through which the control end of the needle is slideably passable, the seal connected to the bore. 12. The spray gun of claim 7, further including a seal positioned to prevent air from flowing out of the spray gun proximate the third opening. 13. A spray gun, comprising: a housing including a chamber;a removable cartridge assembly sized and dimensioned to be releasably insertable within the chamber, the cartridge assembly including: a spray needle having a tapered spray end and a control end;a one piece reservoir for receiving a liquid to be sprayed, the reservoir integrally including: a spray liquid chamber for containing a supply of liquid to be sprayed,a first opening cooperative with the spray end of the needle to permit the liquid to be sprayed to pass out of the reservoir,a second opening at an end opposite the spray opening, through which the needle control end passes,a third opening for admitting the liquid to be sprayed into an interior of the reservoir; anda biasing element arranged inside the spray liquid chamber and connected to the needle to bias the spray end of the needle towards the first opening;a lever connectable to the control end of the spray needle when the cartridge assembly is inserted within the housing;a trigger connected to the lever to slide the spray needle within the reservoir when the cartridge assembly is inserted into the chamber and the control end of the spray needle is connected to the lever and the trigger is moved;an air passage positioned to admit compressed air from a compressed air inlet to an area adjacent the first opening;a first seal positioned to prevent air from flowing out of the spray gun past the reservoir proximate the third opening; anda second seal in fluid communication with the reservoir and positioned between the biasing element and an exterior of the reservoir at the second end, the needle passable through the second seal.
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