Patent ID: 8146618

Claim:
A ball non-return valve comprising: a) a ball ( 4 ), and b) a casing ( 1 ) comprising i) a flow-through channel with an outlet and an inlet terminated with a ring seat into which the ball ( 4 ) is settled when in the closed position, ii) a deflected channel ( 5 ) greater in diameter than the ball into which the ball is placed when in the open position, iii) a ball guiding rail ( 7 ) formed by two symmetrical internal bulges of the casing wall, wherein the ball guiding rail is positioned in a central part of the casing between the inlet and the outlet and extending from a junction of the flow-through channel and the deflected channel toward the outlet, iv) an external bulge of the casing wall protruding to the direction opposite the ball when in the fully open position, v) a supporting blind ( 6 ) terminated at its free ends with oblique surfaces ( 10 ) and positioned in the deflected channel, wherein the supporting blind settles the ball in the deflected channel in the fully open position, and vi) a supporting directional arrangement ( 8 ) extending from the ball guiding rail ( 7 ) and having a top ( 9 ) which is positioned closer to the valve outlet than to the inlet, wherein the supporting directional arrangement ( 8 ) directs the ball ( 4 ) toward the supporting blind ( 6 ) of the deflected channel ( 5 ), and wherein the supporting directional arrangement ( 8 ) together with the oblique surfaces ( 10 ) of the supporting blind ( 6 ) of the deflected channel ( 5 ) produces a slot ( 11 ) widening itself to the direction of the deflected channel ( 5 ) interior, and wherein the supporting directional arrangement ( 8 ) and the supporting blind ( 6 ) together are capable of contacting the ball at more than three points when the ball is in the fully open position.