Filters with filtering elements which move during the filtering operation (filters comprising loose filtering material moving or fluidised during filtration B01D24/28 - B01D24/36; centrifuges B04B)

Child Classifications

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• B01D 33/01 with translationally moving filtering elements, e.g. pistons (B01D33/04 - B01D33/327 take precedence) since 1990 +2 CPC IPC+CPC Available in IPC and CPC
• B01D 33/04 with filtering bands or the like supported on cylinders which are impervious for filtering +1 CPC IPC+CPC Available in IPC and CPC
• B01D 33/044 with filtering bands or the like supported on cylinders which are pervious for filtering since 1990 IPC+CPC Available in IPC and CPC
• B01D 33/056 Construction of filtering bands or supporting belts, e.g. devices for centering, mounting or sealing the filtering bands or the supporting belts since 1990 +1 CPC IPC+CPC Available in IPC and CPC
• B01D 33/06 with rotary cylindrical filtering surfaces, e.g. hollow drums (B01D33/044 takes precedence ) IPC+CPC Available in IPC and CPC
• B01D 33/15 with rotary plane filtering surfaces since 1990 +1 CPC IPC+CPC Available in IPC and CPC
• B01D 33/27 with rotary filtering surfaces, which are neither cylindrical nor planar, e.g. helical surfaces since 1990 +1 CPC IPC+CPC Available in IPC and CPC
• B01D 33/29 the movement of the filter elements being a combination of movements (B01D33/19 takes precedence) since 1990 IPC+CPC Available in IPC and CPC
• B01D 33/333 with individual filtering elements moving along a closed path (tipping buckets, trays or like sections B01D33/327) since 1990 IPC+CPC Available in IPC and CPC
• B01D 33/35 with multiple filtering elements characterised by their mutual disposition ( , B01D33/21 take precedence) since 1990 IPC+CPC Available in IPC and CPC
• B01D 33/44 Regenerating the filter material in the filter (devices for taking out of action one or more units of multi-unit filters, e.g. for regeneration, B01D35/12) since 1990 IPC+CPC Available in IPC and CPC
• B01D 33/58 Handling the filter cake in the filter for purposes other than for regenerating (B01D33/76 takes precedence) since 1990 IPC+CPC Available in IPC and CPC
• B01D 33/70 having feed or discharge devices (B01D33/82 takes precedence) since 1990 +1 CPC IPC+CPC Available in IPC and CPC
• B01D 33/80 Accessories since 1990 +4 CPC IPC+CPC Available in IPC and CPC