Rolled liquid filter using fluted media

US5895574A · kind A · utility

Assignee

• Donaldson Company, Inc. · US

Inventors

• Francis A. Friedmann · South St. Paul, US
• Gary R. Gillingham · Prior Lake, US
• Bernard A. Matthys · Apple Valley, US
• Daniel T. Risch · Burnsville, US
• Wayne M. Wagner · Apple Valley, US
• Fred H. Wahlquist · Bloomington, US

Key dates

• Filing date: Apr 26, 1996
• Grant date: Apr 20, 1999
• Expiry date: Apr 26, 2016

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01D2201/34
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A filter apparatus includes a fluted filter element in a filter housing having a first open end and a second closed end. The filter element includes fluted filter media coiled into a cylindrical shape and may include an end cap for support and fluid control. Fluid flows into the open end and either around the filter to the closed and back through the filter element or through the filter element to the closed end and then back through a central opening in the filter element.