Patent ID: 7150825
Filing Date: 2006-12-19
Classification: B01D,F16K,Y10T

Abstract:
1. A sealing apparatus of a fuel filter comprising: a body formed with a fuel filter side connecting part configured to be inserted into a connector of a fuel filter and a fuel line side connecting part configured to be connected to a fuel line; an oil chamber provided between a first piston and a second piston, the oil chamber located within an inner circumferential side of said fuel filter side connecting part of said body; fuel flow holes radially formed at an external side of said oil chamber, wherein inlets of said fuel flow holes are configured to be opened and closed by said first piston in response to a fuel pressure from said fuel line and to allow fuel passing through outlets of said fuel flow holes to flow to a fuel pipe in a fuel filter; and a barrier valve provided at one side of the body with a valve surface configured to open and close a fuel through-hole disposed between said fuel pipe in said fuel filter and said connector, wherein the second piston is coupled to the barrier valve on a side of the barrier valve opposite to the valve surface and the second piston is configured to move the valve surface in response to the fuel pressure from the fuel line; wherein one side of said oil chamber accommodating said second piston is formed in the shape of a double cylinder, and a distal end of the oil chamber is bent inwardly.