Patent ID: 6763700
Filing Date: 2004-07-20
Classification: B01D,C23C,Y10S

Abstract:
A trap apparatus comprising:an exhaust passage for evacuating a sealed chamber by a vacuum pump; a regenerating passage disposed adjacent to said exhaust passage; a sealed trapping and regenerating casing extending across said exhaust passage and said regenerating passage; a trap unit movably housed in said trapping and regenerating casing for selective movement between a trapping position connected to said exhaust passage and a regenerating position connected to said regenerating passage; a first valve body disposed on one side of said trap unit; a second valve body disposed on a second side of said trap unit; a first seal disposed on an outer circumferential surface of said first valve body; and a second seal disposed on an outer circumferential surface of said second valve body, wherein said first and second seals can be projected so as to be in close contact with the inner circumferential surface of said trapping and regenerating casing, and each of said first and second seals can be retracted so as not to be in contact with the inner circumferential surface of said trapping and regenerating casing.