The only goal of the game came when Scotsman Adam capitalised on some lacklustre QPR defending to drill the ball past Brazilian keeper Julio Cesar early in the second half.
QPR will feel they had plenty of chances to come away with something, Adel Taarabt again the star man going close on a number of occasions but just lacking the end product.
In a game typical of Stokes stoic nature at home, they held firm to maintain their invincibility - it's now more than nine months since a visiting side took all three points from the Britannia.
Whilst opposite number Mark Hughes has failed to win all 15 Premier League away matches as QPR manager, losing 13 times.
Britannia Stadium, Stoke-on-Trent - 27,529