Patent ID: 6029657
Filing Date: 2000-02-29
Classification: A61M,B05B

Abstract:
A check valve comprising:a generally elongate sleeve having an opening therethrough defining an inner surface,a valve seat received substantially within said sleeve opening, said valve seat being generally elongated and having a valve seat opening therethrough,a substantially planar ball cage top received substantially within said sleeve opening, said ball cage top comprising at least one aperture therethrough;a ball received within said sleeve opening and positioned between said valve seat and said ball cage top; wherein said ball cage top is generally elongate and comprises an upper surface, a lower surface, with said lower surface being positioned closer to said ball, a plurality of apertures through said upper surface and said lower surface and a continuous outer wall at a perimeter, wherein at least one of said plurality of apertures is substantially coaxial with said valve seat opening and at least one of said plurality of apertures is positioned proximate said perimeter of said ball cage top between and spaced from both said first of said at least two apertures and said outer wall, and with said at least one other of said plurality of apertures being angled away from said inner surface of said sleeve and in a direction of said ball, whereby fluid passing through said at least one other of said plurality of apertures in a direction from said upper surface to said lower surface is directed away from said inner surface of said sleeve and toward said ball for centering of said ball as said ball is driven by said fluid against said valve seat.