Patent ID: 6554879
Filing Date: 2003-04-29
Classification: B01D,C23C

Abstract:
A trap apparatus, comprising:a discharge path for evacuating a hermetically sealed chamber through a vacuum pump; a hermetically sealed trap container extended across said discharge path and a regeneration path disposed adjacent to said discharge path; a trap unit disposed in said trap container for attaching a product in a discharged gas thereon and removing said product from said discharged gas, said trap unit being selectively located at said discharge path or said regeneration path; a valve element disposed on both sides of said trap unit and being movable integrally with both sides of said trap unit and being movable integrally with said trap unit; and a sealing material mounted on an outer circumferential surface of said valve element so as to slide over an inner circumferential surface of said trap container when said trap unit is moved; wherein said sealing material is mounted on an outer circumferential surface of said valve element so as to be expanded toward an inner circumferential surface of said trap container; further wherein said valve element comprises means for radially expanding said sealing material by pressing said sealing material outwardly; and still further wherein said means for radially expanding said sealing material relatively moves a pair of members facing with each other or a pair of members having a tapered surface away from and nearer to each other, said tapered surface facing with each other and having a V shape extending outwardly in horizontal cross-section.