Patent · US Expired

Check valve

US7581560B2 · kind B2 · utility

17Cited by

20References

20Claims

0Family size

Assignees

Schaeffler KG · DE
IFT GMBH · AT

Inventors

Reinhard Koch · Kronshagen, DE
Rainer Fuhrmann · Waischenfeld, DE
Christian Degenhardt · Clausthal-Zellerfeld, DE
Bernd Stange · Osterode, DE

Key dates

Filing date	Jun 6, 2005
Grant date	Sep 1, 2009
Priority date	—
Expiry date	Jul 21, 2025

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T137/7938
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A check valve includes a housing with an inlet opening and an outlet opening along with a cage-like insert disposed therein as a support for a spring element and for guiding a closing body which can be moved against the spring element and which can be moved between a first end position, in which the spring body lies in contact with a seat to form a seal, and a second end position, in which the valve is completely open. The closing body, which is constructed cylindrically and pot-like, is guided with its cylindrical casing surface at the cage-like insert and in contact with the seat with a flat outer surface.

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