Seal construction for use in valve assembly
AssigneeSMC Corporation
InventorBunya Hayashi
Life of this patent
Estimating the term…
Abstract
A gasket 4 to be interposed between a valve mounting face 2a of a manifold base 2 and a joining face 3a on a casing of a change-over valve 3 is provided with ridges 35 at least on one side thereof. On the other hand, grooves 12 or 20 are substantially complementarily formed on the valve mounting face 2a of the base 2 or on the joining face 3a of the valve casing, so that the gasket 4 is securely clamped between the valve mounting face 2a and the joining face 3a not only at the ridges 35 but also at flat seal surfaces 4a on the opposite sides of the ridges 35.
Claims2
A seal construction for a change-over valve assembly including a manifold base containing a plural number of fluid supply and discharge passages and joined with a change-over valve casing via a substantially flat gasket having joining faces interposed between joining faces of said manifold base and said valve casing, each of said faces connecting ports in communication with said fluid supply and discharge passages in said manifold base, wherein said seal construction includes:
- endlessly connected ridges formed at least on one side of said gasket in such a manner as to circumscribe said connecting ports on said joining face of said manifold base or said change-over valve casing, said ridges extending substantially centrally of flat sealing surfaces of said gasket;
- and
- grooves formed on said opposing joining faces in a shape substantially complementary to said ridges to receive and grip said ridges. therein when said manifold base and change-over valve are joined together
- wherein said ridges have a width smaller than that of said grooves and a height larger than the depth of said grooves, and wherein each of said ridges has a width at a top thereof which is not greater than a width at a base thereof.
Dependencies are inferred from the claim text.