An isolation valve for the resuscitation of patients which has an upper housing and a lower housing that snap together, rotate with respect to one another, and utilize a flexible diaphragm which extends into the small space between the upper housing and the lower housing to assure the establishment of...http://www.google.fr/patents/US5575279?utm_source=gb-gplus-shareBrevet US5575279 - Dual-filtered rotary isolation valve for resusciation
Dual-filtered rotary isolation valve for resusciation
