Patent ID: 8342428

Claim:
A refillable sprayer comprising: a can being hollow and having a top casing for filling a gas into the can and having a bottom edge, an opened first connecting end and a threaded hole; a bottom casing combined detachably with the top casing for directly filling a fixed volume of the oil into the can to control a fixed ratio between the oil and the gas in the can and having an opened second connecting end extending into the top casing and combined detachably with the first connecting end of the top casing in a threaded manner and a connecting shoulder formed around the second connecting end and combined with the bottom edge of the top casing; and an O-ring mounted between the connecting shoulder of the bottom casing and the bottom edge of the top casing; a spray nozzle mounted through the can; a gas filling valve mounted on the can; and a release valve mounted in and connected to the threaded hole of the top casing of the can and having two ends; a screw head mounted on one of the ends of the release valve and screwed into the threaded hole; an exhaust control outlet mounted on the other end opposite to the threaded hole; a flange mounted between the screw head and the exhaust control outlet; and an O-ring mounted around the screw head and mounted between the threaded hole and the flange.