|6588802||Two-part, clamp-connected chimney flue tee|
A two-part clamp-connected chimney flue tee. The tee includes an elongated main section which is detachably connected to a transversely extending bull, or snout section. The main section has flue pipe connection ends and an oval cut-out portion in its sid...
|6431611||Two piece universal elbow|
An air duct fitting comprising a rectangular cross section duct segment having a central axis, a round cross section duct segment having a central axis, and a transition rectangle-to-round segment, the rectangular cross section duct segment having a later...
|5531484||Elbow provided with guide vanes|
An elbow is provided with guide vanes disposed as to make the shapes of the sub-channels defined thereby similar to each other....