Bell Turbine

Abstract

Volumetric turbine blades are proposed that have the capacity to efficiently operate at low flow speeds and oriented in any direction to the incoming flow.

1 . A rotational turbine comprising a hub and at least one blade attached to said hub as generally described in the drawings of the present invention; said blade substantially axially curved along its entire length; and wherein said blade's chord length increases from said hub along the length of said blade to its outer diameter. 
     
     
         2 . A rotational turbine according to  claim 1 , wherein the path of rotation of the median line of said blade if attached radially to said hub can be described as substantially like any of the following three dimensional shapes; hemisphere, truncated sphere, truncated spheroid, truncated paraboloid, truncated ellipsoid, or a bell. 
     
     
         3 . A rotational turbine according to  claim 1 , wherein the path of rotation of the median line of said blade if attached axially to said hub can be described as substantially like any of the following three dimensional shapes; offset-rotated semicircle, offset-rotated parabola, offset-rotated arch.