AC Duct Puller

     This is a duct puller.  (or part of one)     A friend who works for an air conditioning / heating company wanted a faster way to lay heating flex duct in hanging ceilings.  He told me the problem and this is what i came up with.  The sections are 5 feet long and the couplings are 6" long (or more).  This will enable my friend to lay the duct in a hanging ceiling by only removing two ceiling tiles.  The beginning of the run and the end of the run, plus it is now a one man job instead of a two man job.  A nylon cord through the pipe sections pulls the duct over the length of the assembled sections all in one operation.

(rendered models)