Patent · US Expired

Air filtering method and apparatus

US4792344A · kind A · utility

12Cited by

14References

26Claims

0Family size

Assignee

Donaldson Company, Inc. · US

Inventors

Mark Belcher · New Brighton, US
James L. Berkhoel · Woodbury, US
Bruce A. Hampel · Crystal, US

Key dates

Filing date	Jan 19, 1988
Grant date	Dec 20, 1988
Priority date	—
Expiry date	Jan 19, 2008

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01D2273/30
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

Method and apparatus for filtering air are disclosed. A preferred cabinet collector (10) according to the invention includes a housing defining an upper chamber (b 20a) and a lower chamber (20b). Separating the chambers (20a, 20b) are a pair of wedge-shaped filter assemblies (38, 38'). First ends (42, 42') of the filter assemblies (38, 38') are attached the housing wherein second ends (44, 44') are free. Provision is made to automatically periodically move the second ends (44, 44') to clean the filter media, filter displacement apparatus "snapping" the filter assemblies (38, 38') and another displacement apparatus "vibrating" the filter assemblies (38, 38') to achieve the desired media cleaning.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.