Patent · US Expired

Ring encasement with clamps for zigzag fold paper

US6368506B1 · kind B1 · utility

22Cited by

5References

13Claims

0Family size

Assignee

Knecht Filterwerke GmbH · DE

Inventors

Hans Gebert · Sankt Augustin, DE
Claude Gebler · Stuttgart, DE
Dieter Noack · Berlin, DE
Horst Scheider · Waiblingen, DE
Hans Waibel · Waiblingen, DE

Key dates

Filing date	Feb 25, 2000
Grant date	Apr 9, 2002
Priority date	—
Expiry date	Feb 25, 2020

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01D2201/4084
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

The invention relates to a filter, especially an oil filter, comprising a carrier casing which borders a clean room/chamber. The filter also has a filter element which encloses the carrier casing. The filter element is comprised of zigzag shaped folded strip material, whereby the end folds of the filter element are adjacently held together. In order to construct the filter in such a way that a mass-production with a high operational reliability is guaranteed, a clamping strip which fastens the end folds of the filter element is arranged on the exterior surface of the carrier casing.

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