US Patent 7926678 Fuel cap tether

A filler neck closure unit of a vehicle includes a closure cap adapted to close a fuel tank filler neck of the vehicle. Also included is a breakaway tether including a mount ring and a strap. The mount ring is coupled to the cap and formed to include a weakened, frangible section. The strap has a first end coupled to the mount ring and a second end adapted to be anchored to the vehicle which includes the fuel tank filler neck.