Hairmower

I hate going to the barber. I always cut my own hair, and I've gotten fairly proficient at it. Sometimes though, using a pair of electric hair clippers can be inconvenient because the power cord gets in the way and it must be done inside, due to the lack of power outlets in trees, where it creates a mess.

I propose a hair trimmer I can use while walking down the street, designed like the old push lawnmowers. This Trimmer will look like a perfectly cylindrical brush with various bristle-length attachments. The brush will roll as it is moved across the head; driving a rotating mechanism inside equipped with cutting blades. The blades cut all the hair long enough to exceed the length of the bristles.

This would be less efficient than the standard electric trimmer because it would have to make more passes and take more effort, but it is cordless, takes no elctricity, and can be done outside where there is no cleanup, because the hair will blow away and biodegrade. (not intended for city use)