Patent · US Expired

Filter bypass valve having adjustable spring biasing force

US6117312A · kind A · utility

12Cited by

6References

14Claims

0Family size

Assignee

HYDAC FILTERTECHNIK GMBH · DE

Inventors

Harald Mees · Lebach, DE
Michael Sakraschinsky · Sankt Ingbert, DE

Key dates

Filing date	Jun 12, 1998
Grant date	Sep 12, 2000
Priority date	—
Expiry date	Jun 12, 2018

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T137/7937
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A filter device has a bypass valve which releases a fluid-conveying path to an outlet when a filter element becomes clogged. The bypass valve includes a closure part on which at least one closure spring acts. To adjust the spring pretension and the opening force for the closure part, an adjusting device is provided for adjusting the opening force of the closure spring. The filter device can be economically adapted without any structural modifications to very different applications in a predetermined pressure range.

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