Patent ID: 8235310

Claim:
A spraying device cartridge comprising: a first liquid contained within the spraying device cartridge; a first end having a first diameter, configured to be removeably connected to a sprayer body, a second end having a second diameter and located opposite the first end wherein the second end is located in a position above the first end when the spraying device cartridge is connected to the sprayer body such that gravity exerts a downward force on the first liquid to pull the first liquid towards the first end; the first end comprising: a bore extending axially from the first end and having a diameter less than the first diameter and comprising a first set of external threads, the bore defining a fluid flow path for the first liquid, wherein a downstream direction is towards the first end and an upstream direction is towards the second end; a secondary threaded closure being internally threaded for mounting over the first set of threads and being externally threaded for engagement with corresponding threads on the sprayer body or with corresponding threads on a closure cap, the secondary threaded closure having an aperture extending axially through a center bore that is coincident with the bore of the first end; a check valve comprising a duckbill portion and an umbrella portion mounted in the bore and extending through the aperture, the duckbill portion comprising a path for the first liquid to flow through from the spraying device cartridge and the umbrella portion comprising an air flow path for venting of the spraying device cartridge; a metering orifice disposed in the bore, within the secondary threaded closure and located in the fluid flow path downstream of to the check valve; a fluid filter disposed within the bore in the fluid flow path upstream of the metering orifice such that the fluid filter serves to filter the first liquid prior to the first liquid flowing through the metering orifice.