초록 ▼

A check valve includes a housing with an inlet opening and an outlet opening along with a cage-like insert disposed therein as a support for a spring element and for guiding a closing body which can be moved against the spring element and which can be moved between a first end position, in which the

A check valve includes a housing with an inlet opening and an outlet opening along with a cage-like insert disposed therein as a support for a spring element and for guiding a closing body which can be moved against the spring element and which can be moved between a first end position, in which the spring body lies in contact with a seat to form a seal, and a second end position, in which the valve is completely open. The closing body, which is constructed cylindrically and pot-like, is guided with its cylindrical casing surface at the cage-like insert and in contact with the seat with a flat outer surface.

대표청구항 ▼

The invention claimed is: 1. A check valve, comprising: a housing of integral construction including a wall at a first end defining an inlet opening, a bottom end at a second end opposite to said first end defining an outlet opening and a housing seat disposed adjacent to the inlet opening; a sprin

The invention claimed is: 1. A check valve, comprising: a housing of integral construction including a wall at a first end defining an inlet opening, a bottom end at a second end opposite to said first end defining an outlet opening and a housing seat disposed adjacent to the inlet opening; a spring element and a closing body; a cage insert being disposed within the housing and extending substantially between the wall defining said inlet opening and the bottom end defining said outlet opening, said cage insert supporting the spring element and guiding the closing body; the closing body including a flat outer surface contactable with the housing seat, said closing body being moveable against the spring element between a first end position, in which the closing body contacts the housing seat to form a seal, and a second end position in which the valve is completely open; and the closing body being formed pot-shaped including a cylindrical section presenting a cylindrical casing surface, said closing body being guided with the cylindrical casing surface within the cage insert, said cage insert including at least one opening in a side thereof facing said cylindrical casing surface. 2. The check valve of claim 1, wherein a bottom surface of the closing body has a deformation for centering the spring element. 3. The check valve of claim 2, wherein the deformation comprises a bead which points toward the interior of the closing body. 4. The check valve of claim 1, wherein the cylindrical section of the pot-shaped closing body is closed. 5. The check valve of claim 1, wherein a free end of the cylindrical section of the pot-shaped closing body is bent inward. 6. The check valve of claim 1, wherein an opening is provided in the closing body for enabling throttled flow when the valve is closed. 7. The check valve of claim 1, wherein: the valve has a central axis and a passage; and an outer radius of the housing being reduced in a region of the inlet opening and/or the outlet opening so that the housing is drawn inward towards the central axis of the valve for reducing a cross-section of the passage. 8. The check valve of claim 1, wherein: the valve has a passage; and the cage insert being provided with an opening which enlarges a cross-section of the passage in a region adjacent to the outlet opening. 9. The check valve of claim 1, wherein the closing body comprises metal. 10. The check valve of claim 9, wherein the cage insert and the housing comprise metal. 11. The check valve of claim 1, wherein the closing body comprises plastic. 12. The check valve of claim 11, wherein the cage insert and the housing comprise plastic. 13. The check valve of claim 2, wherein the deformation comprises an outwardly curved camber. 14. The check valve of claim 1, wherein the cylindrical section of the pot-shaped closing body comprises at least one slot. 15. The check valve of claim 1, wherein the closing body comprises deep-drawn sheet-metal. 16. A check valve comprising: a cylindrical hollow housing including axial top and bottom end portions; a cage insert including axial top and bottom end portions, the insert comprising a plurality of axially extending guide surfaces disposed between the axial top and bottom end portions of the insert, the guide surfaces forming an axially extending internal space; the insert being disposed within the housing so that the axial top end portion of the insert is positioned against the axial top end portion of the housing, so that the axial bottom end portion of the insert is positioned against the axial bottom end portion of the housing, and so that the insert is axially surrounded by the housing between the top and bottom end portions; a pot-shaped closing body including a radially extending base portion and a slotted cylindrical wall that axially extends from a radial outer edge of the base portion; the closing body disposed within the internal space of the insert so that the cylindrical wall extends away from the top end portion of the housing and the closing body is capable of axially sliding within the insert; wherein the closing body is capable of moving between first and second positions, wherein at the first position, the base portion of the closing body is positioned against the top portion of the housing to form a seal and at the second position, the valve is opened; and a spring element disposed between the base portion of the closing body and the axial top end portion of the insert for biasing the closing body toward the first position. 17. The valve of claim 16 wherein the plurality of guide surfaces comprises at least three guide surfaces and each of the guide surfaces is capable of simultaneously axially guiding the closing body within the insert. 18. A check valve, comprising: a housing including an inlet opening at a first end thereof and an outlet opening at a second end thereof in an axial direction; an insert being disposed in said housing so as to extend substantially between the first end and the second end of the housing, said insert being configured generally as a cage structure presenting guiding sections, said guiding sections being radially spaced apart from one another with spaces being present therebetween along an axial extent thereof for passage of fluid, said guiding sections being axially extended in said housing; a closing body being received within the insert, said closing body having a tubular configuration including one open end and one closed end, said closed end being oriented to face in a direction of said inlet opening of said housing, said housing including a sealing surface facing a radially outward portion of said closed end of said closing body, said guiding sections presenting inwardly facing guide surfaces along a portion of said axial extent of said guiding sections and including a stop at an end of portion of said axial extent leading to said outlet, said closing body being movably guidable along said guide surfaces between a first end position, in which radially outward portion of said closed end of said closing body is seated against said sealing surface and said valve is closed, and a second end position, in which said valve is opened and a front edge of said open end of said closing body is brought into contact with the stop of said insert and said closed end of said closing body is spaced apart from said sealing surface; and a spring being received within said insert, said spring being oriented for biasing said closing body into said first end position. 19. The check valve of claim 18, wherein: the guide surfaces comprise at least three guide surfaces; and the closing body is simultaneously guidable in the axial direction along the at least three guide surfaces. 20. The check valve of claim 18, wherein the tubular configuration of the closing body includes at least one slot extending parallel to or inclined with respect to the axial direction.