Patent ID: 6079449
Filing Date: 2000-06-27
Classification: B65D,F16K,Y10T

Abstract:
A system for contamination-free delivery of a flowable material from an enclosed flow path comprising:a seat having a solid portion and a reversibly deformable seal having a perforation disposed in the flow path, said seal and seat being moveable between a closed position and open position upon deformation of the seal by a mechanical force, electromagnetic field, thermal variation, or other action sufficient to cause said deformation;the seat provided for constraining the flowable material to assume a tube of flow through the seat;and wherein the perforation of the seal conformably engages against the solid portion of the seat in the closed position to create a sealing surface between the seal and seat; such that flowable material at the sealing surface is entrapped as one or more layers for bonding the seal and seat, and said entrapped material is unavailable for back flow migration of contaminating matter.