U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Rotary clay material refiner

Patent 5868256 Issued on February 9, 1999. Estimated Expiration Date: Icon_subject August 29, 2017. 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

Re16674

384861

501898

1649020

2117553

2119414

2208092

2450980

2608716

2760633

More ...

Inventor

Application

No. 920989 filed on 08/29/1997

US Classes:

209/173, Water or aqueous solution209/208, Grading deposition209/294, Lifters and deflectors209/299, Lifters and beaters209/913SCREW FEED CONVEYOR

Examiners

Primary: Terrell, William E.
Assistant: Dillon, Joe Jr.

Attorney, Agent or Firm

Foreign Patent References

  • 534845 CA 12/12/2012
  • 1222479 CA 06/12/1987
  • 866046 FR 06/12/2012
  • 1066339 FR 01/12/2012
  • 61649 DE 02/12/1892
  • 191356 DE 08/12/2012
  • 627316 GB 08/12/2012
  • 754895 GB 08/12/2012

International Classes

B03B 005/60
B03B 005/28
B03B 005/56

Abstract

An apparatus for refining clay material having a horizontally oriented rotating drum into which clay material and water are fed. The clay material and water form a slurry which is agitated by lifters within the drum. A series of adjustable lifters within the drum refine the slurry by lifting aggregates and rocks out of the slurry and discharging them out of the refiner. The refined slurry exits the drum through an opening in the drum. The refined slurry is then taken away from the drum for further processing.

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