The US Patent office likes to see context and specificity these days. Just writing a description of a general mechanism without any use will not pass, so you have to name uses and how the patent uniquely meets a function. So in writing a patent description, one must try to be as specific as possible for airtight protection on whatever product will be created, but general enough that someone can't just change a few minor things and use it for something else. It's a delicate balance, so look for a Patent Attorney who gets involved with patent litigation on a regular basis. They will understand what you want to do and write a patent to not just get through USPTO, but will hold up in court.
