Filter with backwash cleaning

• US 2,775,348 A
• Filed: 09/30/1953
• Issued: 12/25/1956
• Est. Priority Date: 09/30/1953
• Status: Expired due to Term

• Current Assignee: Burdell S. Williams
• Original Assignee: Burdell S. Williams
• Inventors: Williams, Burdell S.
• Application Number:
  US03/383,281
• Time in Patent Office: 1,182 Days
• US Class Current: 210/412
• CPC Class Codes: B01D 29/114 arranged for inward flow filtration B01D29/15, B01D29/33 take precedence
• CPC Class Codes: B01D 29/66 by flushing, e.g. counter-current air-bumps
• CPC Class Codes: B01D 35/02 Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks, B01D35/05 takes precedence; water pipe system filters E03B3/18, E03B7/07; dirt catchers in sewers E03F; filters or strainers for pipe-lines in general B08B, E03F; object or dirt catching devices in sinks or the like E03C1/26; suction strainers or filters for pumps F04B53/005, F04D29/70
• CPC Class Codes: B01D 35/26 Filters with built-in pumps filters provided with a pump mounted in or on the casing aquarium pumps or filters A01K63/04
• CPC Class Codes: F04D 11/005 Swash-type impeller pumps
• CPC Class Codes: F04D 29/708 specially for liquid pumps

Claims