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Disposable spray gun cartridge

  • US 9,327,301 B2
  • Filed: 03/12/2008
  • Issued: 05/03/2016
  • Est. Priority Date: 03/12/2008
  • Status: Active Grant
First Claim
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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; and

    a 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; and

    a 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.

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