An elbow fluid flow valve exhibiting reduced flow loss and including a body having a specified shape and size and defining a short radius associated with an elbow shaped fluid passageway characterized by a first fluid flow inlet and a second fluid flow outlet. A cover secures over the valve body, and...http://www.google.com/patents/US7921867?utm_source=gb-gplus-sharePatent US7921867 - Elbow plug external sleeve valve
