Patent ID: 6669440
Filing Date: 2003-12-30
Classification: F04D

Abstract:
In an air pump having a housing with a blower therein and an outlet and a control box, wherein the improvements comprise:the control box having two conduits respectively and oppositely defined in a side face of the control box, two magnetic valves being movably received in the control box and each magnetic valve corresponding to one of the conduits so as to selectively seal the conduits, each of the magnetic valves including (a) a coil with a hole defined in a side face of the coil, (b) a plug having one of a pair of free ends movably received in the hole, (c) a spring compressibly mounted between the side face of the coil and the plug, and (d) a pad securely attached to the other free end of the plug to selectively seal a corresponding conduit, wherein each plug is attracted by a magnetic force generated by a corresponding energized coil to provide a respective conduit with communication between inside and outside of the control box.