초록 ▼

In a preferred ball-valve construction, a valve body has spaced inlet and outlet ports on an axis of flow that is controlled by an interposed ball; the ball is rotatable about a body-fixed axis which intersects the axis of flow at the geometric center of the ball. In the closed condition of the valv

In a preferred ball-valve construction, a valve body has spaced inlet and outlet ports on an axis of flow that is controlled by an interposed ball; the ball is rotatable about a body-fixed axis which intersects the axis of flow at the geometric center of the ball. In the closed condition of the valve, an annular valve-seat member associated with one of the ports has circumferentially sealed contact with the ball. The annular valve-seat member is guided for axial displaceability into and out of its engageability with the ball, and actuation of the valve utilized coordination of valve-seat displacement with ball rotation such that valve-seat engagement with the ball is only for the closed condition of the valve, and such that, valve-opening rotation of the ball can occur only while the annular valve-seat member is in axial-clearance relation with the ball. Various embodiments are disclosed.

대표청구항 ▼

A rotary-ball and poppet-action valve comprising: (a) a valve body having inlet and outlet ports on a first axis of fluid flow; (b) a spherical ball-valve member interposed between said ports and supported by said body for rotary displaceability about a body-fixed axis that is on a diameter of the g

A rotary-ball and poppet-action valve comprising: (a) a valve body having inlet and outlet ports on a first axis of fluid flow; (b) a spherical ball-valve member interposed between said ports and supported by said body for rotary displaceability about a body-fixed axis that is on a diameter of the geometric sphere of said valve member, wherein said fixed axis and said first axis intersect at the center of said geometric sphere; (c) said spherical ball-valve member being a shell which is a truncated portion of a sphere and having inner and outer spherical surfaces, one of said ports having a cylindrical bore extending axially within said geometric sphere and into axially adjacent clearance relation with said inner surface, the other of said ports having a cylindrical bore extending axially outside said geometric sphere and into axially adjacent clearance relation with said outer surface, the truncated portion of said sphere being of such angular extent about the body-fixed axis as to span both of said bores when in the valve-closing position of said shell; (d) one of said ports, including an annular valve-seat member defining the cylindrical bore of said one port and guided for axial displaceability in and out of shell-engaging closure of the adjacent one of said axially adjacent clearances; and (e) actuating means for axially displacing said annular valve-seat member in coordination with rotation of said ball such that said seat member is in circumferentially continuous engagement with said shell only when said shell is in its valve-closing angular position.