A solid-liquid separating apparatus comprising a cylindrical strainer formed by circular ring members with gaps in between, a casing having the strainer therein, and scrapers disposed in the respective gaps between the circular ring members for removing solid matter adhering to the end (flat) surfaces...http://www.google.com/patents/US20020000406?utm_source=gb-gplus-sharePatent US20020000406 - Solid-liquid separating apparatus
