Patent · US Active

Filtering apparatus

US11058975B2 · kind B2 · utility

0Cited by

2References

14Claims

0Family size

Assignee

HYDAC PROCESS TECHNOLOGY GMBH · DE

Inventors

Ralf Wnuk · Bexbach, DE
Jörg Hermann Gerstner · Ettlingen, DE
Thomas Böttcher · Boynton Beach, US
Thomas Morawietz · Erbach, DE

Key dates

Filing date	Apr 26, 2012
Grant date	Jul 13, 2021
Priority date	—
Expiry date	Dec 25, 2035

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01D29/668
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A filtering apparatus has filtering elements (11) in a filter housing (1), a filter inlet (7) and a filter outlet (9). During filtration, one of the filter elements (11) can be back-flushed by a back-flushing device (45, 49), having a pressure control device (19). The pressure control device has a hydraulic accumulator (19), with a fluid chamber (47) fillable during filtration with clean fluid and connectable for back-flushing via a back-flushing guide (45) to the clean side (29) of the filtering element (11) to be cleaned. For back-flushing, a further fluid chamber (48) of the hydraulic accumulator (19) is subjected to gas pressure. By resultant movement of a separator (59) of the hydraulic accumulator (19), the filling amount of the clean fluid is dispensed for the back-flushing.

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