Patent · US Active

Brewing unit for a coffee machine

US7481152B2 · kind B2 · utility

7Cited by

2References

6Claims

0Family size

Assignee

WIK FAR EAST LTD. · CN

Inventors

Markus Steckhan · Mühlheim, DE
Dietmar Becker · Tamm, DE

Key dates

Filing date	Nov 28, 2006
Grant date	Jan 27, 2009
Priority date	—
Expiry date	Dec 12, 2026

Classification

Technology area (CPC A)Human Necessities
CPC primaryA47J31/3609
WIPO fieldFurniture, games
WIPO sectorOther fields

Abstract

A brewing unit 1 for a coffee machine comprises a brewing cylinder 2 and a piston 5, 13, wherein the brewing cylinder 2 and the piston 5, 13 are movable relative to one another in the axial direction. An activatable seal 12, 18 or seal assembly is provided to seal the piston 5, 13 against the inner wall 3, 15 of the brewing cylinder 2. The seal 12, 18 is activated by an axial movement of piston 5, 13 with respect to the brewing cylinder 2. Under compression when activated, to form a seal between piston 5, 13 and brewing cylinder inner wall 3, 15, and which seal 12, 18 or seal assembly. When not activated, the seal 12, 19 is either not at all, only under low compression contact with the element.

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