A tubing adaptor of unitary plastics construction is assembled with an endotracheal or other medico-surgical tube for coupling the tube to a connector or tubing of larger diameter in a gas circuit. The adaptor has a tubular stem which closely fits into the tube and which extends from, and opens through,...http://www.google.de/patents/US4052990?utm_source=gb-gplus-sharePatent US4052990 - Medico-surgical tube and adaptor
