Patent · US Expired

Flap valve for a dispenser

US4771925A · kind A · utility

17Cited by

8References

2Claims

0Family size

Assignee

Henkel Kommanditgesellschaft auf Aktien · DE

Inventors

Albert Stoffler · Hilden, DE
Dietholf Mehl · Goldkronach, DE
Lorenz Eckers · Tostedt, DE

Key dates

Filing date	Nov 21, 1983
Grant date	Sep 20, 1988
Priority date	—
Expiry date	Nov 21, 2003

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T137/7891
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

This invention is directed to a flap valve for a dispenser for viscous fluids. More particularly, this invention is directed to a flap valve having a body with a cylindrical valve opening therein, produced by injection molding which is circularly symmetrical to the cylindrical valve opening and extends outwardly around the axis of symmetry, wherein at least one spoke bridges the valve opening diametrically and has a sprue wart in the center thereof, said body cooperating with a flap which closes said cylindrical valve opening, the center part of which flap is arched away from the sprue wart out of the plane of its edge, which edge sealingly fits over the edge of said cylindrical valve opening.

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