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Class Information
Number: 210/530
Name: Liquid purification or separation > Gravitational separator > Mechanical constituent mover > Horizontally rotating scraper > Tank rim-supported carriage
Description: Apparatus wherein the scraper is supported by a carriage moving on the rim of the tank.

Patents under this class:

Patent Number Title Of Patent Date Issued
7637379 Circular secondary clarifier for wastewater treatment and an improved solids-liquid separation process thereof Dec. 29, 2009
6875351 Methods and apparatus for oil demulsification and separation of oil and suspended solids from produced water Apr. 5, 2005
6773593 Continuous flow reactor wastewater treatment plant Aug. 10, 2004
6431370 Direct enzyme agglomeration process Aug. 13, 2002
6126824 Scum removal system for liquid treatment tank Oct. 3, 2000
6105786 Surfactant-based extraction process Aug. 22, 2000
6022475 Brush cleaning device Feb. 8, 2000
6016924 Apparatus for cleaning water treatment tank surfaces Jan. 25, 2000
5948277 Method for removing floating matter and a removing device Sep. 7, 1999
5720890 Weir cleaning apparatus and method Feb. 24, 1998
5490920 Self-cleaning sedimentation unit Feb. 13, 1996
5423980 Wastewater treatment apparatus with ice resistant adjustable friction drive Jun. 13, 1995
5422006 Underwater clearing device for round sewage treatment basins Jun. 6, 1995
5415771 High capacity single tank water clarification system May. 16, 1995
5389249 Clarifier with rotating sealed cover Feb. 14, 1995
5376269 Installation for skimming a vat Dec. 27, 1994
5271832 Activation plant with funnel-shaped secondary sedimentation Dec. 21, 1993
5269928 Clarifier tanks Dec. 14, 1993
5176835 Apparatus for continuous purification of liquids Jan. 5, 1993
4994182 Apparatus for the thickening by floatation of slurries produced during the treatment of waters Feb. 19, 1991
4978447 Self-propelled apparatus for cleaning a water treatment tank Dec. 18, 1990
4931175 Water clarifying apparatus Jun. 5, 1990
4859346 Ground mounted traction drive and method for sedimentation device Aug. 22, 1989
4751002 Cable supported rake arm thickener Jun. 14, 1988
4687576 Current propelled waste water treatment mechanism Aug. 18, 1987
4626345 Apparatus for clarification of water Dec. 2, 1986
4594156 Motorized surface scum skimmer for waste water treatment apparatus Jun. 10, 1986
4377485 Apparatus and method for clarification of water using combined flotation and filtration processes Mar. 22, 1983
4367141 Apparatus for the concentration of sludges and suspensions Jan. 4, 1983
4364834 Sedimentation apparatus having an improved skimming mechanism Dec. 21, 1982
4272369 Liquid treatment apparatus Jun. 9, 1981
4175041 Apparatus for degassing floating sludge Nov. 20, 1979
4142977 Device for extracting sludge from a circular decanter Mar. 6, 1979
4141832 Apparatus for removal of solids from a sedimentation zone Feb. 27, 1979
4141831 Apparatus for removal of solids from a sedimentation zone Feb. 27, 1979
4137170 Travelling precipitate collector Jan. 30, 1979
4054514 Sedimentation apparatus with flocculating feed well Oct. 18, 1977
4022697 Sealed sedimentation device May. 10, 1977
4022696 Apparatus for clarification of waste water operating on dissolved air flotation process May. 10, 1977
3993568 Sludge settling basin Nov. 23, 1976
3977974 Suspended sludge scraper for arcuate sedimentation zone Aug. 31, 1976
3959152 Traction-driven composite sludge raking mechanism for sedimentation tanks May. 25, 1976
3951819 Sludge removal system Apr. 20, 1976

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