Fluid control device

Claim 2

A fluid flow control valve for permitting free fluid flow in one direction at a threshold pressure and for stopping return flow in the opposite direction comprising a first valve body element having a passage means therethrough, the passage means having a fluid inlet opening and a fluid outlet opening, a second valve body element having a passage theretHrough, the passage means of said second valve body element having a fluid outlet opening and a fluid inlet opening, means for securing the first valve body element to the second body element in fluid tight engagement, the fluid outlet opening of one of the body elements being disposed adjacent to and in communication with the fluid inlet opening of the other body element to provide a substantially continuous fluid flow passage therethrough, a deformable valve seat member having a fluid flow passage therethrough secured between the valve body elements adjacent the communicating outlet and inlet openings, a relatively light normally closed poppet having an abutting portion disposed in fluid-tight engagement solely with the deformable valve seat member for effecting variable deformation of the seat member, means on the poppet for positioning the poppet with respect to the deformable valve seat, said means on the poppet including a portion for minimizing fluid turbulence through the flow control valve, resilient biasing means positioned in the passage means of one of the valve body elements to maintain the poppet in normally closed relationship with respect to the deformable valve seat member and permit the poppet to open at a threshold pressure to achieve free flow, limit means to control the maximum degree of deformation of said deformable valve seat member, said limit means includes a non-deformable member spaced from the valve seat adapted to contact said poppet upon a predetermined deformation of said valve seat member by said poppet, and said non-deformable member comprises a washer element positioned adjacent said deformable valve seat member in confrontation to said poppet for contacting the portion minimizing fluid turbulence.

Claim 3

The fluid control device of claim 1 wherein said washer element contacts said means for positioning the poppet upon predetermined deformation of said valve seat member.

Claim 4

The control valve of claim 1 wherein the first valve body element is threaded in fluid-tight engagement with the second valve body element and the deformable valve seat member is clamped simultaneously with the threading of the body elements between the first and second valve body elements.

Claim 5

The control valve of claim 3 wherein the poppet is disposed in an enlarged passage located between the outlet side of the valve seat and the fluid outlet of the valve passage, and the poppet is formed with a plurality of vanes which serve both to position the poppet in predetermined relationship with respect to the valve seat and to control the flow of fluid past the poppet.

Claim 6

The control valve of claim 4 wherein the vanes extend generally radially outwardly from the body portion of the poppet and in spaced relationship.

Claim 7

The control valve of claim 1 wherein the first valve body element is threaded in fluid-tight engagement with the second valve body element and the deformable valve seat member is clamped between the first valve body element and a ring member disposed adjacent an opposing wall of the second valve body element.

Claim 8

A fluid flow control valve for permitting free fluid flow in one direction at a threshold pressure and for stopping return flow in the opposite direction comprising a first valve body element having a passage means therethrough, the passage means having a fluid inlet opening and a fluid outlet opening, a second valve body element having a passage therethrough, the passage means of said second valve body element having a fluid outlet opening and a fluid inlet opening, means for securing the first valve body element to the second body element in fluid tight engagement, the fluid outlet opening of one of the body elements being disposed adjacent to and in communication with the fluid inlet opening of the other body element to provide a substantially continuous fluid flow passage therethrough, a deformable valve seat member having a fluid flow passage therEthrough secured between the valve body elements adjacent the communicating outlet and inlet openings, a relatively light normally closed poppet having an abutting portion disposed in fluid-tight engagement solely with an area of the deformable valve seat member for effecting variable deformation of the seat member, means on the poppet for positioning the poppet with respect to the deformable valve seat, said means on the poppet including a portion for minimizing fluid turbulence through the flow control valve, resilient biasing means positioned in the passage means of one of the valve body elements to maintain the poppet in normally closed relationship with respect to the deformable valve seat member and permit the poppet to open at a threshold pressure to permit free flow, and the portion of the poppet adapted to engage the valve seat is formed with a concave portion facing the upstream side of the valve passage connected by a generally continuous rounded portion having a predetermined radius, the area of the valve seat engaged by the poppet having a predetermined concave radius adapted to establish a line contact with the poppet at a selected range of pressure and to establish curvature contact at pressures greater than the selected range.

Claim 9

A fluid flow control valve for permitting free fluid flow in one direction at a threshold pressure and for stopping return flow in the opposite direction comprising a first valve body element having a passage means therethrough, the passage means having a fluid inlet opening and a fluid outlet opening, a second valve body element having a passage therethrough, the passage means of said second valve body element having a fluid outlet opening and a fluid inlet opening, means for securing the first valve body element to the second body element in fluid tight engagement, the fluid outlet opening of one of the body elements being disposed adjacent to and in communication with the fluid inlet opening of the other body element to provide a substantially continuous fluid flow passage therethrough, a deformable valve seat member having a fluid flow passage therEthrough secured between the valve body elements adjacent the communicating outlet and inlet openings, a relatively light normally closed poppet having an abutting portion disposed in fluid-tight engagement solely with an area of the deformable valve seat member for effecting variable deformation of the seat member, means on the poppet for positioning the poppet with respect to the deformable valve seat, said means on the poppet including a portion for minimizing fluid turbulence through the flow control valve, resilient biasing means positioned in the passage means of one of the valve body elements to maintain the poppet in normally closed relationship with respect to the deformable valve seat member and permit the poppet to open at a threshold pressure to permit free flow, and the portion of the poppet adapted to engage the valve seat is formed with a concave portion facing the upstream side of the valve passage connected by a generally continuous rounded portion having a predetermined radius, the area of the valve seat engaged by the poppet having a predetermined concave radius adapted to establish a line contact with the poppet at a selected range of pressure and to establish curvature contact at pressures greater than the selected range.