Hose for hose connecting port connection, especially for connecting to port of vehicle heater combustion air fan, is flexible at least in connection end region, has engagement formation on inside

摘要

The hose (16) is flexible at least in a connection end region (22) and has an engagement formation (28) on the inside (26) in the connection end region. The engagement formation includes at least one engagement protrusion that protrudes on the inside. The engagement formation can have several engagement protrusions. An independent claim is also included for the following: (a) a hose connecting port connection.