Talk:Obturator ring

Was an Obturator ring a kind of piston ring? Biscuittin (talk) 20:05, 7 March 2009 (UTC)
 * If the bicycle pump analogy is correct, the Obturator rings would compensate for the warping of the cylinders but not prevent it. I have amended the article accordingly. Biscuittin (talk) 20:20, 7 March 2009 (UTC)