Patent ID: 7380569
Filing Date: 2008-06-03
Classification: B60K,B67D,F16J,F16K,Y10T

Abstract:
1. A valve body for a backflow prevention valve, comprising: a valve body main unit having a circular step surface facing a circular valve seat surface of a valve chamber, and a circular groove with one groove wall extending from the circular step surface, said valve body main unit being always urged in a direction of closing an inflow port surrounded by the circular valve seat surface, and an elastic seal body with a ring shape inserted into the circular groove of the valve body main unit, said elastic seal body having a main portion disposed above the circular step surface, a groove formed in the main portion, and a circular fin-shaped part projecting from an outer perimeter part thereof, said main portion and said circular fin-shaped part directly facing and being pushed against the circular valve seat surface together with the valve body main unit for closing the valve and preventing backflow of fluid.