US 12,557,939 B2Granted

Coffee machine filter cartridges

AssigneeTianjin Yunda Industry and Trade Co., Ltd.

InventorEnyu Wei

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Abstract

Exemplary embodiments of a filter cartridge for a coffee machine are disclosed. According to one exemplary embodiment, a coffee machine filter cartridge may include a filter body having a water inlet, a grate and a water outlet, and a lid held on the filter body. The water inlet is disposed around the water outlet. The water outlet connects to one end of the grate through a pipe. The other end of the grate is held on the inner wall of the filter body and comprises a cloth filter. A filter chamber between the pipe and the filter body has a descaling core. When filtering and descaling, the water flows sequentially through the water inlet, filter chamber, grate, cloth filter, pipe, and water outlet. The cartridge is structurally simple, convenient and accessible to users; preventing clogging of the internal parts of the coffee machine by slow dissolution of the descaling agent.

Claims7

Dependent claims

A filter cartridge for a coffee machine comprising:

a filter body comprising:
an inner wall;
a grate comprising a cloth filter, a first end, and a second end, the second end being connected to the inner wall;
a water outlet connected to the first end of the grate through a pipe;
and
a water inlet disposed around the water outlet;
a filter chamber formed between the pipe and the filter body and comprising a descaling core for removing scale;
a lid attached to the filter body,
wherein during a filtering and descaling process, water flows sequentially through the water inlet, the filter chamber, the grate, the pipe, and the water outlet,
wherein the grate further comprises a bracket having upper ends,
wherein the upper ends of the bracket expand outward;
wherein an upper side of the filter body comprises a convex stop, a lower side of the lid comprises a concave stop;
and the convex stop matches the concave stop;
wherein the grate is funnel-shaped;
wherein the first end of the grate comprises a first boss providing an interference fit with an upper end of the pipe fastening the grate to an inner side of the filter body;
wherein the bracket is located at the second end of the grate and the bracket abuts a bulge on the inner wall of the filter body;
wherein the grate further comprises V-shaped grooves spaced on the bracket, and a second boss to place the cloth filter;
wherein a first annular grid is provided between the bracket and the second boss;
and
wherein there is a height difference between the cloth filter and the V-shaped grooves, and the first annular grid.

17 more elements

Dependencies are inferred from the claim text.

Facts

Application: 18/378,460Filed 10 Oct 2023 · continuation
Priority: CN 202021368006.113 Jul 2020
Published: US 2024/0041249 A18 Feb 2024
Granted: 24 Feb 2026
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

A47J 31/605
Cleaning devices: water filters
C02F 1/003
Processes for the treatment of water whereby the filtration technique is of importance: using household-type filters for producing potable water,…
C02F 5/10
Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding…: using…
C02F 1/001
Treatment of water, waste water, or sewage: processes for the treatment of water whereby the filtration technique is of importance

Family

Application17/070,509Parent of this continuation · filed 14 Oct 2020
US 2024/0041249 A1Pre-grant publication · published 8 Feb 2024
US 11,819,156 B2Parent of this continuation
US 2022/0007882 A1Published application
US 12,557,939 B2This patent

From the US filing history. Foreign family members aren’t listed.