公开(公告)号：US12263424B2

公开(公告)日：2025-04-01

申请号：US17642303

申请日：2021-01-13

Applicant: HYDAC FILTERTECHNIK GMBH

Inventor： Volkmar Klein ,  Michael Sakraschinsky ,  Stefan Hennes

IPC: B01D35/30 ,  B01D29/23

Abstract: A filter device for the filtration of fluids has a filter housing (10), which can be closed by a cover (40), and has a filter element (30) accommodated in a replaceable manner in the filter housing. At least one functional element is present on the cover (40) and on the filter housing (10) and on the filter element (30) in such a way that the filtration of the fluid is only possible when all functional elements interact simultaneously.

公开(公告)号：US10150064B2

公开(公告)日：2018-12-11

申请号：US15557514

申请日：2016-01-12

Applicant: HYDAC FILTERTECHNIK GMBH

Inventor： Volkmar Klein ,  Michael Sakraschinsky

IPC: B01D29/23 ,  B01D35/143 ,  B01D35/147 ,  B01D35/153 ,  B01D37/04 ,  B01D29/60

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.

公开(公告)号：US10143945B2

公开(公告)日：2018-12-04

申请号：US14433425

申请日：2013-10-11

Applicant: Hydac Filtertechnik GmbH

Inventor： Michael Sakraschinsky ,  Sebastian Fiedler

IPC: B01D29/60 ,  B01D29/15 ,  B01D29/21

Abstract: A filter device includes a filter element (3), through which a fluid to be purified can flow at a determinable fluid operating pressure, and which can be accommodated in a housing (1). The fluid pressure prevailing at the respective filter element (3) may exhibit pressure increases or pressure peaks, which are damaging to the filter element (3), and in particular to its filter material (9), and which can be reduced and/or smoothened by a compensation device acting directly on the filter element (3) and having a flexible compensation element (29) that enables the volume of the fluid chamber of the housing (1) to be increased in accordance with a pressure peak or pressure increase. The flexible compensation element (29) is arranged between the outer side of the filter material (9) of the filter element (3) and the adjacent inner wall of the housing (1).