Patent ID: 8336923

Claim:
A duct elbow for a dryer vent, comprising (i) a rigid tubular duct section, with a bend at the midpoint of said duct section; (ii) a dryer connecting end of said duct section, the inside surface of which has threading and has one or more grooves each adapted to receive an O-ring; and (iii) a duct connecting end of said duct section, the outside surface of which has threading and has one or more grooves each adapted to receive an O-ring; wherein said duct section further comprises: a. first half having an inside edge of which has a lip along its length and fastening means; b. a second half having an inside edge of which has a recession along its length and fastening means wherein said first half and said second half are assembled to form said duct section, the inside edge of said first half placed against said inside edge of said second half, and the lip within the recession, and said first half and said second half are fastened by the fastening means; and wherein said fastening means further comprises: 1. two or more pairs of tension flanges having a gap between each flange in a pair and a tab on the outside of each flange positioned on the first half; and 2. two or more apertures corresponding in position to said pairs of tension flanges positioned on the second half; wherein each pair of tension flanges is adapted to pass through a respective said aperture, and the tabs are adapted to engage the wall of the aperture to hold said first half and second half together.