SKIMMERS FOR POLLUTION CONTROL DEVICE

摘要

Floating skimmers slidable on an intake conduit having means counteracting the internal pressure drop normally incident to the intake operation. In one embodiment, the cone member has upper vent openings and an internal cylindrical part around the conduit and depending down to near the bottom of the cone. In a second embodiment, the upper cone member is connected pneumatically to the internal chamber of a bellows and the moveable part of the bellows is connected structurally to the cone. In both embodiments, the upper cone has a horizontal flange and the lower float has a flat surface extending slightly past the flange and positioned close to the flange in normal use.