Willi A Wegener
Engineers in Salt Lake City, UT

4157301, Jun 5, 1979

Mar 15, 1978

5/886837

Willi A. Wegener - Salt Lake City UT

Envirotech Corporation - Menlo Park CA

B01D 3308

210404

Filter drum having its surface divided by longitudinal division strips into a plurality of separate filtration sectors each of which is provided with a plurality of lead and trail ports. In each sector, all lead ports communicate with a single manifold through ports in the manifold wall, the manifold is in turn connected to a filter valve by a single conduit; and all trail ports register with ports in another manifold in turn connected by a single conduit to the filter valve. The manifolds are formed as rectangular conduits secured to the inside of the drum wall and extending the full length thereof. The boundaries between adjacent manifolds are located under division strips. The manifold for a given sector is physically located next to the manifold connected to the lead port for the next succeeding adjacent sector. The ports are formed as elongated slots in the drum deck as close as possible and parallel to the division strip. Corresponding slots are formed in the manifold; and the deck and manifold are seal welded to each other around the periphery of the slots.

4147634, Apr 3, 1979

Mar 15, 1978

5/886838

Willi A. Wegener - Salt Lake City UT

Envirotech Corporation - Menlo Park CA

B01D 3336

210396

A segmented cake discharge deflector blade for rotary drum filters. Each segment includes a straight blade mounted on a plurality of spaced apart U-shaped flat steel springs with the free edge of the straight blade extending beyond the closed end of the U. The face of the filter tank is provided with a clamp for receiving the free end of the other leg of each spring. The springs are preselected for proper tension. Complemental elements on the tank wall and springs cooperative with each other provide proper positioning of the free edge of the blade segments relative to the drum face.