I have one almost, if not, identical and it's called the Pneu-Sweep from 1915 iirc. There's a bellows mechanicsm driven by the drive wheels that sucks up the dirt into a thin cloth back accessible by taking off the wooden front portion. Then theres the carpet sweeper brushroll and pans underneath. Quite the contraptions but they work, not that great. I think the carpet sweeper part does most of the work. Mines in very good condition and yours looks to be as well.
They don't sell for much if they sell at all on Ebay so probably just as good to hang onto it or possibly trade it for something in the future if you're looking to get rid of it.
