| 摘要 |
A filter housing has an access opening for passage of a filter sideways into and out of the housing, the opening being surrounded by an outwardly extending flange surrounded by a flange on a removable door. Inside the housing, at the side opposite its outlet opening, is a pressure bar and a manually rotatable shaft that extends out of the housing beside the door so that it can be turned to actuate means for forcing the bar against a filter aligned with the outlet opening to seal the filter against the housing wall around the opening. Outside of the housing the shaft is provided with a screw thread, on which there is a nut for moving a doorstop into a position where it will prevent closing of the door whenever a filter is not being pressed against the housing side wall by the pressure bar.
|
