Duct insert

Abstract

A duct insert having a body with an open front end and an open rear end. A plurality of fins are fixed to and extend radially from an inner surface of the body towards a longitudinal axis of the body. The duct insert is placed within an air duct adjacent to a vent to increase air flow.

What is claimed is: 
     
         1 . A duct insert comprising:
 a tubular cylinder having an open front end and an open rear end; and   a plurality of fins fixed to and extending radially from an inner surface of the tubular cylinder towards a longitudinal axis of the tubular cylinder, wherein   the plurality of fins are curved towards a same direction.   
     
     
         2 . The duct insert of  claim 1 , wherein each of the plurality of fins comprise a leading edge and a tapered edge wherein the leading edge is substantially perpendicular to the longitudinal axis and the tapered edge tapers towards the open rear end. 
     
     
         3 . The duct insert of  claim 1 , wherein each of the plurality of fins further comprise a trailing edge substantially perpendicular to the longitudinal axis. 
     
     
         4 . The duct insert of  claim 1 , wherein the plurality of fins are evenly spaced apart. 
     
     
         5 . The duct insert of  claim 4 , wherein the plurality of fins comprises at least five fins. 
     
     
         6 . A method of increasing air flow within an air duct comprising:
 providing a duct insert comprising:
 a body having an open front end and an open rear end; and 
 a plurality of fins extending radially from an inner surface of the body towards a longitudinal axis of the body; and 
   coupling the duct insert within an air duct such that an air flow passes into the open rear end through the body and out the open front end.   
     
     
         7 . The method of  claim 6 , wherein the plurality of fins are curved towards a same direction. 
     
     
         8 . The method of  claim 7 , wherein the body comprising a tubular cylinder. 
     
     
         9 . The method of  claim 6 , wherein each of the plurality of fins comprise a leading edge and a tapered edge wherein the leading edge is substantially perpendicular to the longitudinal axis and the tapered edge tapers towards the open rear end. 
     
     
         10 . The method of  claim 9 , wherein the duct insert is coupled adjacent to a grate, wherein the leading edge is facing the grate. 
     
     
         11 . The method of  claim 6 , wherein the plurality of fins are evenly spaced apart. 
     
     
         12 . The method of  claim 6 , wherein the plurality of fins comprises at least five fins.