Patent ID: 8794256

Claim:
A check valve comprising: (a) a valve body having each of an internal chamber, a first aperture formed through a first end of said valve body, and a second aperture formed through an axially opposite second end of said valve body; (b) an annular valve seat disposed at a juncture of said internal chamber with one of said first and second ends of said valve body; and (c) a poppet mounted for a linear movement along a poppet axis within said internal chamber between said first and second ends of said valve body, said poppet including: (i) a predetermined cross-sectional shape in a direction transverse to said poppet axis, (ii) a peripheral rim defining a movement guiding surface, (iii) a frustoconical surface provided in one axial end of said poppet and oriented in a direction toward one end of said valve body, said frustoconical surface tapering from said peripheral rim in a direction toward said poppet axis, (iv) an annular sealing bead disposed on said frustoconical surface, said annular sealing bead having an exterior surface thereof raised a distance from said frustoconical surface, said exterior surface having a convex shape in a plane having said poppet axis disposed therewithin, said convex shape being defined by an arc disposed tangent to said annular valve seat and having a radii originating on said poppet axis, and (v) a predetermined plurality of passages formed in a predetermined pattern through at least one of said peripheral rim and said frustoconical surface in open communication with an opposed axial end of said poppet.