Rotary leaf filter

Claim 1

IN A PRESSURE FILTER, A HOUSING ADAPTED TO BE PARTIALLY FILLED WITH A SLURRY WITH SUPER ATMOSPHERIC PRESSURE THEREON; A HOLLOW LONGITUDINALLY EXTENDING SHAFT MOUNTED FOR ROTATION WITHIN SAID HOUSING; A PLURALITY OF HOLLOW SPACED FILTER LEAVES LOCATED ALONG SAID SHAFT WITHIN SAID HOUSING AND FIXED TO SAID SHAFT FOR ROTATION THEREWITH; COMMUNICATING PASSAGE MEANS BETWEEN THE INTERIOR OF SAID LEAVES AND THE INTERIOR OF SAID SHAFT; TUBULAR MEANS EXTENDING ALONG THE BOTTOM OF SAID HOUSING, SAID TUBULAR MEANS BEING CLOSED AT ONE END AND EXTENDING THROUGH ONE END WALL OF SAID HOUSING; CHUTE MEANS EXTENDING UPWARDLY FROM SAID TUBULAR MEANS BETWEEN ADJACENT FILTER LEAVES AND TO AN ELEVATION ABOVE THAT OF THE NORMAL LEVEL OF THE SLURRY WITHIN SAID HOUSING; SCRAPER BLADE MEANS ADJACENT EACH FACE OF EACH FILTER LEAF, ABOVE THE LEVEL OF SLURRY WITHIN SAID HOUSING FOR SCRAPING FILTER CAKE FROM SAID LEAVES AND FEEDING IT INTO SAID CHUTE MEANS; SAID SCRAPPER MEANS BEING HINGEDLY MOUNTED FOR MOVEMENT RELATIVE TO SAID FILTER LEAVES AND SAID CHUTES, AND UNITARY MEANS MOUNTED FOR RECIPROCABLE MOVEMENT IN SAID HOUSING, MEANS INTERCONNECTING SAID LAST MENTIONED MEANS WITH EACH OF SAID SCRAPER MEANS SO THAT THE LATTER ARE MOVABLE INTO AND OUT OF SCRAPING RELATIONSHIP WITH SAID LEAVES, SAID TUBULAR MEANS HAVING MEANS CONVEYING THE CAKE REMOVED FROM SAID LEAVES TO THE EXTERIOR OF SAID HOUSING.