Lewis Hamilton looked as happy and delighted with his win at the Circuit of the Americas in the 2012 United States Grand Prix as he has been in the past with any of the 20 previous Grand Prix victories that had preceded it.

Hamilton admitted that he had almost lost his voice at the end of the race after he celebrated his victory by deafening the team over the radio communications during the cool-down lap.

"I was screaming the whole time," he revealed. "Not cool at all but I'm just so happy. To come back here, after such a long time, and win is something really special."

Hamilton was the last winner of the United Stated Grand Prix when it was held at Indianapolis in 2007; and he's now the first winner of the event in its inaugural running at its new home in Austin, Texas.

"It's been one of the best, if not the best, Grands Prix we've had all year," was Hamilton's view of the event. "For me and my team this is so special. It's been a long time since I've had a win and I'm so proud of what they have done.

The victory has particular significance, after two likely wins in recent months slipped through his fingers due to technical issues while Hamilton was in the lead of the race. Reliability concerns had certainly been in his mind in the final laps at COTA, he admitted.

"I rubbed the car and said 'Come on baby, we can make it'," he said - a tactic that obviously worked, as the McLaren suffered no glitches at all on Sunday.

The decisive moment came on lap 42 when when Hamilton finally got within DRS activation zone of the back of Sebastian Vettel's Red Bull, and was able to take advantage of Vettel having to deal with lapped traffic in order to make his own dive down the inside into turn 11.

Even so, "Overtaking Vettel wasn't easy," Hamilton insisted. "It was actually quite tricky. When I finally got close to him, I seemed to be catching him in the first sector and that was difficult.

"And then the backmarkers came into play, finally. How many times has it happened to me when I got caught out? But this time, it worked out and I knew that was going to be the lap," he continued. "I turned the engine up to maximise the revs and went for the inside, but he defended. So, I went to the outside and he closed the door a bit so I was very lucky."

Hamilton said that it had been "really special" to have had such an epic battle with the reigning world champion at Texas. He went on to praise the "amazing" fans that had turned out in high numbers at the new Circuit of the Americas for the race.

Hamilton had very much wanted to get at least one more win with McLaren before he departs the team at the end of the season for a new challenge of Mercedes. Now he's done that, he'd rather like to do it all over again and have another farewell party at Interlagos to cap his time at Woking with a double-header.

"To finish on a high is really special," he said. "Hopefully we can go to Brazil with the same pace."