Patent ID: 7506663
Filing Date: 2009-03-24
Classification: F16K,Y10T

Abstract:
1. A magnetic check valve comprising a cage mountable in a fluid flow duct and supporting a plunger moveable between a closed position blocking fluid flow past said valve, and an open position permitting fluid flow past said valve, one of said cage and said plunger including a magnet, the other of said cage and said plunger including ferrous material magnetically attracted to said magnet to magnetically bias said plunger to said closed position, wherein fluid flows axially in said duct, and said plunger slides axially in said duct in axial sliding relation along an axial guide track, wherein said fluid flows along an axial flow direction from upstream to downstream in said duct, said plunger comprises a disk spanning laterally relative to said axial flow direction and magnetically biased in an upstream axial direction to said closed position, and moveable in a downstream axial direction from said closed position to said open position against said magnetic bias, and wherein said plunger has at least one leg extending axially upstream from said disk, and said cage comprises a plate having at least one guide bore receiving said leg and guiding axial movement of said leg therethrough.