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US 7,581,560 B2Granted
Check valve
AssigneesSchaeffler KG, IFT GmbH
InventorsReinhard Koch, Rainer Fuhrmann, Christian Degenhardt, Bernd Stange
Life of this patent
Estimating the term…
Abstract
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.
Claims20
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.
3 more elements
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.
5 more elements
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.
2 more elements
Dependencies are inferred from the claim text.