US 8,794,256 B2 · Self-sealing check valve

Abstract

A check valve includes a valve body defining an internal chamber and a valve seat disposed within the internal chamber adjacent to one of the first and second ends of the valve body. A poppet is mounted for linear movement along a poppet axis within the internal chamber between the first and second ends of the valve body and has a predetermined cross-sectional shape in a direction transverse to the poppet axis, a peripheral rim defining a movement guiding surface, a frustoconical surface provided in one axial end of the poppet and oriented in a direction toward the one end of the valve body, a sealing bead disposed on the frustoconical surface, and a predetermined plurality of passages formed in a predetermined pattern through at least one of the peripheral rim and the frustoconical surface in open communication with an opposed axial end of the poppet.

Claims28

Dependent claims

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.

6 more elements

A check valve comprising:

(a) a valve body manufactured from a first predetermined material and including:
(i) a first hollow portion having each of an outer open end defining a first open end of said valve body, an inner open end axially opposed to said outer end along a flow axis of said valve body, a first annular peripheral flange disposed on said inner end and extending outwardly transverse to said flow axis, said first annular peripheral flange having a substantially smooth surface disposed perpendicular to said flow axis, and a first annular groove formed in said substantially smooth surface,
(ii) a second hollow portion having each of an outer open end defining a second open end of said valve body, an inner open end axially opposed to said outer end of said second portion along said flow axis of said valve body, a second annular peripheral flange disposed on said inner end of said second portion and extending outwardly transverse to said flow axis, said second annular peripheral flange having a substantially smooth surface disposed perpendicular to said flow axis, and a second annular groove formed in said substantially smooth surface of said second portion in alignment with said first annular groove,
(iii) an internal chamber formed by said first hollow portion and said second hollow portion, said internal chamber having a round cross-section in a direction transverse to said flow axis, said internal chamber open at each of said first and second ends of said valve body,
(iv) a resilient seal at least disposed within said pair of aligned annular grooves, and
(v) a clamp abuttingly engaging tapered outer surfaces of said pair of peripheral annular flanges;
(b) a substantially planar annular surface disposed within said internal chamber adjacent to one of said first and second ends of said valve body at a predetermined angle relative to said flow axis thereof, said annular surface having an annular chamfer encasing an inner edge thereof;
and
(c) a disk shaped poppet mounted for linear movement within said internal chamber along said flow axis of said valve body between said first and second ends thereof, said disk shaped poppet having a poppet axis thereof normally aligned with said flow axis of said valve body, said disk shaped poppet manufactured from a second predetermined material distinct from said first predetermined material of said valve body, said disk shaped poppet including:
(i) a round cross-sectional shape in a direction transverse to said poppet axis,
(ii) a peripheral annular rim defining a substantially smooth movement guiding surface,
(iii) a cavity formed in one axial end of said disk shaped poppet, said cavity tapering inwardly in a direction toward said poppet axis starting at said one axial end of said poppet,
(iv) a substantially smooth frustoconical surface provided in an opposed axial end of said disk shaped poppet oriented in a direction toward said one end of said valve body, said frustoconical surface tapering from said peripheral rim in a direction toward said poppet axis,
(v) a sealing bead disposed on said frustoconical surface and having a substantially radial surface raised a predetermined distance from said frustoconical surface and abuttingly engaging said annular chamfer of said valve body, and
(vi) a predetermined plurality of passages formed in a predetermined radial pattern through said frustoconical surface in open communication with each of said peripheral rim and said cavity, wherein a total cross-sectional area of said predetermined plurality of passages in said direction transverse to said poppet axis is greater than a cross-sectional area of each of said first and second open ends of said valve body.

12 more elements

A check valve comprising:

(a) a valve body including:
i. first and second inlet ends spaced apart from each other along an axis of said valve body, each of said inlet ends having an axial aperture formed therethrough,
ii. an outlet end having an aperture formed therethrough, wherein an axis of said aperture of said outlet end is disposed normal to said axis of said valve body, and
iii. an internal chamber in open communication with each of said first and second inlet ends and said outlet end;
(b) an annular valve seat disposed at a juncture of said internal chamber with each of said first and second inlet ends of said valve body;
and
(c) a first poppet mounted for a linear movement along a poppet axis within said internal chamber between said first and second inlet ends of said valve body, said first poppet including:
(i) a peripheral rim,
(ii) a frustoconical surface provided in one axial end of said first poppet and oriented in a direction toward one of said first and second inlet ends of said valve body, said frustoconical surface tapering from said peripheral rim in a direction toward said poppet axis,
(iii) an 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 seat and having a radii originating on said poppet axis, and
(iv) passages formed through at least one of said peripheral rim and said frustoconical surface in open communication with an opposed axial end of said first poppet
(d) a second poppet mounted for a linear movement along a poppet axis within said internal chamber between said first and second inlet ends of said valve body, said second poppet including:
(i) a peripheral rim,
(ii) a frustoconical surface provided in one axial end of said second poppet and oriented in a direction toward an opposite one of said second and second inlet ends of said valve body, said frustoconical surface of said second poppet tapering from said peripheral rim thereof in said direction toward said poppet axis,
(iii) an annular sealing bead having an exterior surface thereof raised a distance from said frustoconical surface of said second poppet, said exterior surface of said annular sealing bead of said second poppet having said convex shape, and
(iv) passages formed through at least one of said peripheral rim and said frustoconical surface of said second poppet in open communication with an opposite axial end thereof;
and
(e) an axial stop carried by at least one of said first and second poppets, said axial stop configured to maintain a fixed distance between said first and second poppets so as to prevent intermeshing thereof during operation of said check valve.

15 more elements

Dependencies are inferred from the claim text.

Self-sealing check valve

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Self-sealing check valve

Life of this patent

Abstract

Claims28