MODULAR SEAL AND VALVE ASSEMBLY AND METHOD OF OPERATION

摘要

A modular seal and valve assembly which Includes a seal and passageway, the seal having a cross-sectional diameter which converges in a direction of passage of an Instrument through the passageway. The seal includes at least one seal engaging member which is eiigageable with the seal for biasing the passageway of the seal so as to be normally closed while still permitting passage of an Instrument therethrough upon overcoming the biasing course of the at least one seal engaging member. The method of sealing the passageway including the step of providing the seal and engaging the seal with the at least one sealing member.