Inventors are often reluctant to disclose all technical details of their invention in their patent application. They fear that disclosing these details in a patent application makes it too easy for copycats.
Although this reasoning is certainly understandable, it goes against the idea of patent protection. Disclosing your invention helps society as a whole to broaden the state of the art and to stimulate innovation. In exchange for disclosing your invention, a granted patent gives you the right to exclude competitors from manufacturing, using, selling, offering for sale, importing or exporting your patented invention for a limited term.