Eccentric rotary disk valve with elastic metal seal

Claim 1

Eccentric rotary disk valve for tight shut-off purposes comprising: a. tubular housing b. one inlet formed in said housing, inlet and outlet ends adapted to be coupled to a pipeline c. a straight cylindrical passage formed in said housing towards a stop shoulder, forming a reduced cross section at that point; d. a ring shaped seal retainer removably and adjustably placed within the straight cylindrical passage having an inner bore on an axis which is parallel to but offset from that of the exterior diameter of the seal retainer; e. a shaft located perpendicular to and offset from the longitudinal axis of the tubular housing and being retained on either end by the outer walls of said housing; f. an eccentric rotating disk tiltingly engaged with said shaft and within the reduced cross section of said housing, said disk having an annular continous, partially spherical periphery forming a seating surface; g. a flexible metal seal ring having a generally U-shaped cross-sectional configuration when viewed in the circumferential direction, wherein the outer straight portion of said U-shaped configuration is engaged within the inner bore of said seal retainer and suitably fastened to the same at its terminating end, while the inner straight portion of said U-shaped configuration forms a central circular seating bore to engage the eccentric disk in the closed valve position, the bottom portion of said U-shaped configuration facing said disk and the straight portions of said U-shaped configuration being generally parallel to said longitudinal axis of said tubular housing.