Method and apparatus for collecting seminal fluid for artificial insemination is provided and wherein the apparatus has a flexible wall closed at one end and with a rim at the other open end movable in a reciprocating fashion back and forth with respect to the closed end wall. An inflatable sphincter...http://www.google.co.uk/patents/US4312350?utm_source=gb-gplus-sharePatent US4312350 - Apparatus for collecting seminal fluids
