Patent ID: 8939169
Filing Date: 2015-01-27
Classification: E03F,F16K,Y10T

Abstract:
1. An unpowered apparatus for preventing a backflow, comprising: a hollow body having an inlet port and an outlet port, the hollow body configured to be disposed in a horizontal manner; a shoulder plate disposed within the hollow body configured to tilt relative to a horizontal direction of the hollow body, the shoulder plate having a fluid communication port formed therein to communicate fluid between the inlet port and the outlet port of the hollow body; a door hinged-coupled to the hollow body within the hollow body, wherein the door has a door body configured to open or close the fluid communication port via a hinge-movement of the door, and a pair of blocking plates extending vertically from both sides of the door body, respectively, configured to be inserted between inner walls of the hollow body and the shoulder plate; and a floating part fixed to a lower face of the door body.