Heated carpet without electricity
The Dutch inventors brought to the market a carpet-rug, which is a large circle of a concentrically laid strong hose of a small diameter with a braid of mat fibers. Buyers have to connect the hose to the heating battery (usually modern batteries have two pipe connectors at each end, to the "extra" of which you can connect). Of course, there is a shut-off valve at the “mouth” of the carpet hose, which allows the circulation of hot water to be turned off from time to time, after which the carpet cools down by itself.
The inventors also assure that when water circulates with a temperature of 70 ° C, the temperature of the outer braid of the carpet (60 ° C) leads to the death of a dust mite on it. This is important, for example, for patients with asthma, for whom it is dangerous to have ordinary carpets at home.
Of course, a floor covering that is tightly connected to a battery has its drawbacks: if it gets dirty, you can't take it to the bath, you can't dry-clean it; in winter, you don't kick dust in the snow according to the northern tradition; hard to lift to clean the floor underneath; there is a small chance of piercing the hose and flooding the floor.
But even taking into account the indicated disadvantages, the salesability of such a product promises to be huge. Such a serious heating of the floor and room air, achieved with the help of a rather cheap device - without a single watt of electricity, without the use of expensive solar and wind generators, without laying an even more expensive floor heating system - gives an obvious big monetary gain to households, offices, educational institutions.
In addition, the successors of the idea can reinvent a lot here - at least for the sake of not repeating a patented product. This can be a system for easily disconnecting the hose from the battery after the shut-off valve; metal impenetrable tube instead of a hose; removable cover instead of mat sheathing.
Suitcase with shelves inside and pull-out sturdy legs
The whole idea of an entrepreneur from Trenton, NJ is evident from the photo. We add that when folded, the suitcase does not differ in size from the standard - 64 centimeters high without wheels, 36x46 centimeters in area; volume of 100 liters.
Retractable three plastic shelves with supports for them and metal legs together add more than a meter of height to the lying suitcase - which turns the unfolded suitcase into a solidly standing rack with a height of more than 1.5 meters.
The thing, of course, is also patented, but, again, it is not difficult to improve and patent it. Let's say you can offer additional shelves between the lower legs. The top shelf can be made folding - that is, not 30x60, like the rest of the shelves, but four times larger: the size of a good table. Finally, in addition to the shelves, various hooks and handles can also be pulled out of the suitcase - for example, on special tubes.