Tell me what the idea is and I'll tell you if it's any good or not ... <gets pen and paper ready and finds address of patent office ...
Seriously though, I think it costs a reasonable sum to patent something, and you have to be very, very specific to define what you're patenting.
I take it is a physical thing - something that someone you use?
Is it a completely unique idea, or is it an update / improvement to an existing thing?
Just trying to flesh-out what it is - generally speaking - so that others can chip-in based on their experience / expertise.
PS. It's not a cycling forum is it? ... lol