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strangebrain
 USA
Stair Snow Blower Printer Friendly Version
Having slipped down the stairs (more than once in my life) while shoveling snow, it occured to me that a snow blower the size of a swiffer or shop vac would be most handy. A light weight snow blower that cleans the stairs without bending and scraping and heaving heavy loads of snow from dangerous stairs.
Reward: I'd love to have one, someone please invent it!
 

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kennysky
 USA
The leaf catcher Printer Friendly Version
I think it's time to throw the rake away and come up with a new idea to pick up leaves in the yard. How about a light weight vacuum to fit on your back with a bag attached that can hold leaves as you pick them up. Like an industrial blower but to pick up instead of blow away. It could be electrical or gas engine. Just another idea to save time and make the yard work a little easier.

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Rishi
 India
Automatic Irrigator Valve Printer Friendly Version
There are many references in various electronic journals, design, or D-I-Y magazines to devices, which deliver water to plants based on monitoring the dryness of the surrounding soil.
All of them are electronic circuits, which require power for monitoring and power for the valve that delivers the water. The power has to be low voltage and available at the plant being watered.
The idea proposed now is to develop a non-electrical direct acting automatic irrigator, which can be attached to any drip irrigation system, or even any water pipe.
There are many polymers and polymer gels some of which are humidity sensitive. Choose one, which is not bio-degradable and changes volume with humidity. Make a low pressure valve with a rod made of this polymer attached to the valve seat. Bury this part of the valve at the place moisture has to be monitored.
On drying, the rod contracts letting out water. On hydration, the rod expands sealing off the water.
Reward: Greener Plants
 

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