Wet-type sand classifier
Patent 4151074 Issued on April 24, 1979. Estimated Expiration Date: 
June 20, 1997. 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.
June 20, 1997. 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 References 1917300 2047202 2119414 2836299 3556498 Drum-type sand classifier Patent #: 4055487 InventorAssigneeApplicationNo. 05/808217 filed on 06/20/1977US Classes:209/44, Sifting and stratifying209/156, Horizontal current209/294, Lifters and deflectors209/452, With agitators or conveyors209/482DrumsExaminersPrimary: Halper, RobertAssistant: Hokanson, Jon E. Attorney, Agent or FirmInternational ClassesB03B 5/56 (20060101)B03B 5/00 (20060101) AbstractA rotary drum-type sand classifier of this invention is provided with a desired number of rows of sand discharging mechanisms at the rear end thereof.Between each pair of sand discharging mechanism, a water cleaning chamber is formed where the classified sand is cleaned with water fed from the rear outlet of the drum. Due to the above construction, the sand classifier of this invention can conduct the classifying and cleaning of sand to be produced simultaneously and efficiently.Field of SearchHorizontal currentWith agitators and conveyors Liquid Horizontal or inclined axis With agitators or conveyors Distributing Conveyers PRECEDENT PREPARATION OF ITEMS OR MATERIALS TO FACILITATE SEPARATION Drum Stationary sifters With agitators With agitators Lifters and deflectors Aqueous suspension and sifting | |
