초록 ▼

A valve comprises a valve housing, a first bearing sleeve defining an inlet passage, a second bearing sleeve defining a main outlet passage and a third sleeve defining a secondary outlet passage, all in the valve housing, and a generally spherical valve closure member co-operating with the sleeves,

A valve comprises a valve housing, a first bearing sleeve defining an inlet passage, a second bearing sleeve defining a main outlet passage and a third sleeve defining a secondary outlet passage, all in the valve housing, and a generally spherical valve closure member co-operating with the sleeves, having a passage therethrough for connecting the main outlet passage with the inlet passage in an open position of the valve in which the secondary outlet passage is closed and having a recess extending from the valve passage for connecting the main and secondary outlets when the valve is in a closed position.

대표청구항 ▼

A valve including: an inlet for letting fluid into the valve; an outlet for letting fluid out of the valve; a housing connectiNg the inlet to the outlet; a plug for selectively closing the inlet, said plug having a portion with a convex spherical surface area thereon and rotating about an axis exten

A valve including: an inlet for letting fluid into the valve; an outlet for letting fluid out of the valve; a housing connectiNg the inlet to the outlet; a plug for selectively closing the inlet, said plug having a portion with a convex spherical surface area thereon and rotating about an axis extending through said housing between an open and closed position, wherein said axis passes through the center of curvature of said spherical surface; means for defining at least one concave spherical sealing surface within said housing, wherein said convex spherical surface has the same center of curvature, as said convex spherical surface area of said plug, and wherein said concave and convex spherical surfaces cooperate to close said inlet, when said plug is rotated to said closed position; a U-shaped cut-out extending through said plug, and defining an opening adjacent to said convex spherical surface for registering said inlet with outlet, when said plug is rotated to said open position, said U-shaped cut-out extending radially with respect to said axis; a vent opening for venting said outlet and extending through said housing, said opening having a sealing sleeve therein with an entry surface thereon having a concave spherical surface which conforms to and engages the convex spherical surface of the plug, when the plug is in the open position; said convex spherical surface area of said plug being sufficiently large to said inlet opening, when said plug is rotated to the closed position and sufficiently limited to uncover said vent when said plug is rotated to the closed position; and a projection extending up from the bottom of the “U-shaped”cut-out, wherein said projection has a groove therein extending normal to the axis of rotation of the plug, said groove registering with said vent opening, and said projection engaging the concave entry of said sleeve positioned in said opening, when said convex spherical surface closes said inlet opening.