Filter medium

US10071327B2 · kind B2 · utility

Assignee

• HYDAC FILTERTECHNIK GMBH · DE

Inventors

• Edwin Koch · Tholey, DE
• Matthias Schwender · Kirkel, DE

Key dates

• Filing date: Dec 23, 2013
• Grant date: Sep 11, 2018
• Expiry date: Oct 9, 2034

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01D39/1623
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A filter medium for cleaning fluids includes a filter layer (9) formed from a filter material in a pleated web with a longitudinal direction (X) and a transverse direction (Y). A plastic grid (10) forms a support layer, bears against the filter layer (9) and has linear elements (12, 14) delimiting through openings (16) between them. Two groups of linear elements (12, 14) extend approximately at right angles to one another and delimit rectangular through openings (16). The linear elements (14) having a smaller diameter (d2) are in direct contact with the filter layer (9). The linear elements (12) having a larger diameter (d1) and having a greater spacing from one another relative to the filter layer (9) rest on the smaller diameter linear elements (14).