Abstract: The controlled dosage dispensing valve is a device that may be placed atop an extraneous cylinder. It is an aim of the device to facilitate the metering and dosing chambers within a plurality of annular aperture and an upper portion of the intake channel respectively through a plurality of fuel apertures. To accomplish this, a spigot valve system, a dosing system, and a cap system are integrated onto a single apparatus that may be fitted over an external gas cylinder. Further, a return spring is disposed that may facilitate vertical reciprocating motion consequent to the consumption of fuel in the associative metering and dosing chambers. With an extraneous tool about the device that induces a downward vertical force on the valve spigot and the pressure of the fuel propagated by the extraneous fuel cylinder, the device achieves the reciprocating motion necessary to meter and dose the fuel.

Abstract: A refillable external dosing valve for use in dispensing a hydrocarbon fuel for a gas auto-feed drive tool. The re-fillable dosage valve includes an entry point (5) and a non-return valve so that a fuel canister (2) is able to be reloaded after the fuel bag internally of the canister has been totally deflated. The valve is adapted to engage the canister in a manner allowing the valve to establish fluid communication with the fuel in the canister and co-operate with a refilling nozzle of apparatus adapted to deliver a substance from a reservoir through the dosing valve to refill a receptacle with said substance. The valve is also configured to include an internal metering chamber which enables a predetermined amount of fuel to be delivered to a metering chamber within the gas auto-feed drive tool. Residual gas within the canister can also be removed when the canister is to be disposed of.