If they're bringing something to market, even if not immediately, that can do this, it's not frivolous. There are a lot of serious technical challenges to be solved creating a machine that can function as described.
Patenting an invention is orthogonal to commercialising it. The point of patents is to sell abstract ideas: the basic interaction is to license a patent to someone else. It's a coincidence if the same person who thinks up an invention, is also in a position to develop it fully.
I think this meme -- that your patents are for your own products -- is an off-target response to patent trolling.
First reported at [0]. You can find the patent application at [1].
The basic claim is for a tool head and two 'manipulators' that, together, can add and remove 'components' and material from components. In particular, the two manipulators would provide for 6 dimensions of freedom for the tool head, and this seems to be the core of the application.
Lets hope it works better than some of their other products. I tried their gutter cleaning robot once and it is hard to see how it could have worked for anyone.
