Tandem waterwheel trommel
Patent 5490928 Issued on February 13, 1996. Estimated Expiration Date: 
October 17, 2014. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
October 17, 2014. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesDevice for separating coarse and fine particles from ultrafines Concrete aggregate collecting apparatus Filter press Patent #: 5110466 InventorAssigneeApplicationNo. 323542 filed on 10/17/1994US Classes:210/380.3, Horizontal axis209/3, PRECEDENT PREPARATION OF ITEMS OR MATERIALS TO FACILITATE SEPARATION209/240, Feeding and discharging209/270, Drum209/288, Rotating209/369, Rotating210/391, With cleaning means210/393, Backwash or blowback and additional cleaner210/394, Discharging inside, e.g., internal-type drum210/397, With plural outlets from filter casing366/30, With dynamic charging366/60, With specified actuating or control means366/228, Attached directly to chamber wall366/601MOTOR CONTROLExaminersPrimary: Dawson, Robert A.Assistant: Reifsnyder, David A. Attorney, Agent or FirmForeign Patent References
International ClassB07B 001/22AbstractA tandem waterwheel type trommel apparatus having a laterally-disposed drain-off drum and a laterally-disposed classifying drum combined through a short pipe to form a main body, which is rotatably disposed on a base and is connected to a drive unit. A front end plate and a rear end plate each having a doughnut-like shape are respectively provided at the front and rear ends the drain-off drum. A plurality of buckets are provided in the drain-off drum, and gutters are provided on the back side of upper end portions of the buckets. The gutters communicate with drain holes formed in the rear end plate. A fixed shoot is provided which extends through the drain-off drum to the classifying drum. The classifying drum has a cylindrical portion and a truncated-cone portion. A circumferential member of truncated-cone portion is made porous while a circumferential member of the cylindrical portion is formed of a wire netting. A screw is provided on the outer circumferential surface of the cylindrical portion. The classifying drum is accommodated in semicylindrical fixed bath. A water washing sprayer is provided above the cylindrical portion.Field of SearchPRECEDENT PREPARATION OF ITEMS OR MATERIALS TO FACILITATE SEPARATIONWith weighting Feeding and discharging Drum Rotating Rotating Clearers Rotating element construction Horizontal axis With cleaning means Backwash or blowback and additional cleaner Discharging inside, e.g., internal-type drum Solid cleaner, e.g., scraper With plural outlets from filter casing TANGENTIAL FLOW OR CENTRIFUGAL FLUID ACTION By weight With dynamic charging With specified actuating or control means Attached directly to chamber wall MOTOR CONTROL | |
