Filter apparatus

US10150064B2 · kind B2 · utility

Assignee

• HYDAC FILTERTECHNIK GMBH · DE

Inventors

• Volkmar Klein · Schneeberg, DE
• Michael Sakraschinsky · Sankt Ingbert, DE

Key dates

• Filing date: Jan 12, 2016
• Grant date: Dec 11, 2018
• Expiry date: Jan 12, 2036

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01D2201/295
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A filter apparatus includes a filter housing having a filter head (3) and a filter bowl (7). The housing accommodates a filter element that separates a non-filtrate side (15) from a filtrate side (17). A differential pressure measurement device (59) indicates at least a blockage of the filter element during filtration operation and has a measurement piston (91) that is guided in a measurement housing (88) in a longitudinally displaceable manner. An end face (90) of that piston is subjected to the instantaneous pressure of the non-filtrate side (15). The opposite end face of the piston is subjected to the instantaneous pressure of the filtrate side (17). Each instantaneous pressure passes into the measurement housing (88) via at least one conduit (57, 61, 65, 89). At least a section (57, 61) of the conduit is arranged in an element cap (43) of the filter element.