Patent ID: 6283448
Filing Date: 2001-09-04
Classification: F16K

Abstract:
An offset butterfly valve comprising:(a) a valve body with an air flow conduit extending there through wherein a cross section of the conduit is round,(b) a flat valve plate dimensioned as an oblique cross section of the conduit and rotationally mounted within the conduit about a rotational axis of a valve plate shaft which is offset from a center of the valve plate and offset from a center axis of the conduit,(c) two opposing indentations on an interior surface of the conduit positioned and dimensioned to accommodate a minimum diameter of the valve plate when the valve plate is rotated to an open position which is in alignment with a plane parallel to the axis of rotation of the valve plate and parallel to a center of the conduit, and wherein the indentations extend through the valve body and are shaped as an arc originating at the axis of rotation of the valve plate with an indentation cover removably attached to an outside surface of the valve body.