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US 6,143,046 AGranted
Filter cartridge having vibratable diaphragm
AssigneeFirma Carl Freudenberg
InventorsHans Wiegand, Uwe Visel
Life of this patent
Estimating the term…
Abstract
A filter cartridge, including a tubular filter element which encloses an interior space on the downstream, clean air side, is joined in the axial direction on one side to a side-face lid, forming a seal. In order to reduce pressure peaks which occur in the filter element on the clean air side, the lid has a diaphragm which is capable of vibrating.
Claims9
A filter cartridge comprising:
- a tubular pleated filter element having a side-face, an exterior upstream air side and an interior downstream air side, the interior downstream side facing an interior space into which filtered air can flow;
- and
- a lid having an air permeable diaphragm arranged centrally in the lid and radially within pleats of said pleated filter element that is capable of vibrating, said lid being sealingly joined to the side-face of the filter element so that vibrations of the lid diaphragm serve to reduce pressure peaks which may arise in the filter element on the downstream air side.
Dependencies are inferred from the claim text.