Patent ID: 6073363
Filing Date: 2000-06-13
Classification: F26B

Abstract:
An opening/closing device for a discharge hole of a filter-drier, comprising: an outer shell of a driving means of an opening/closing plate, said outer shell being attached to a discharge tube, and said discharge tube being formed on a side of a bottom of said filter-drier; said driving means being accommodated within said outer shell; a screw shaft connected to a motor through a reduction device, and threadably coupled to a screw nut of a movable tube; and said opening/closing plate being for opening and closing said discharge hole in accordance with its back-and-forth movements by a help of said driving means,said opening/closing device further comprising:said outer shell having a cylindrical shape;an opening formed at an end of said outer shell and inside a flange; anda cylindrical sealing cover extending from said opening/closing plate so as to be inserted into said opening,whereby said outer shell is made to have a sealed interior, and when processed drug powders are discharged out of said filter-drier through said discharge hole and said discharge tube, the drug powders are prevented from being introduced into the interior of said outer shell.