VALVE APPARATUS HAVING A DOUBLE-OFFSET SHAFT CONNECTION.

摘要

Valve apparatus having a double - offset shaft connection are described herein. An example flow control member (502) includes a sealing surface (524) to move relative to a seal (514) where the flow control member has a first axis (608) and a second axis (610) substantially perpendicular to the first axis and the first and second axes intersect a center of curvature (606) of the sealing surface. The flow control member also includes an opening (612) to receive a shaft (518) where the opening has a third axis (614) passing through the opening to define a pivot (616) about which the sealing surface rotates. The third axis is offset from the first and second axes.