Patent ID: 7231938
Filing Date: 2007-06-19
Classification: B60T,F16K,Y10T

Abstract:
1. A check valve for a pump of an electronically controlled brake system, comprising: a valve body provided with a fluid path; a spring seat placed in an outlet of the fluid path of the valve body; a valve rod fitted at a lower end thereof into an inlet of the fluid path of the valve body; a valve piston provided with a through hole that is selectively opened and closed by engagement between a surface provided on the valve piston and an upper end of the valve rod, as the valve piston moves upward and downward along an inner wall of the valve body; and a spring interposed between the spring seat and the valve piston, wherein at least a portion of the valve piston surrounds a longitudinally extending surface of the valve rod, when the valve piston moves upward and downward along an inner wall of the valve body.