I think there was a Huffy model named "Roadmaster" but apparently there was also a company with that name. The Roadmaster name is now part of Pacific Cycles, along with Mongoose, Iron Horse, Schwinn, and GT. Regardless, it's a low-end bike, with an Ashtabula steel crank and chintzy-looking brakes. The rest of it appears to be in good shape, so it might be worth putting a front wheel on it for light use.