A centrifuge test tube cap assembly for sealing a thin walled test tube used primarily with a vertical tube rotor. The cap assembly is designed for convenient and easy removal from the test tube through the use of internal means which activates the direct sealing and unsealing of the cap with respect...http://www.google.fr/patents/US4080175?utm_source=gb-gplus-shareBrevet US4080175 - Internally activated sealing centrifuge test tube cap assembly
Internally activated sealing centrifuge test tube cap assembly
