US 5,794,519 · Granted 1998-08-18

The Brewing Head That Made Single-Serve Coffee Pods Possible

Imagine a coffee machine head that clamps down on a small capsule filled with ground coffee, pierces it with needles to inject hot water, and then punches holes in the bottom so the brewed coffee flows out. That's what this patent does—it's the mechanical genius behind pod-based espresso machines.

Curated and verified by the IsItPatented Editorial team

The plain-English version

What it protects

The claim covers a two-part brewing head that sandwiches a coffee capsule between an upper and lower section. What's protected here is the specific design where hollow needles in the upper head inject hot water into the capsule, while a pyramid-shaped plate with projections in the lower head punches the capsule bottom and directs the brewed coffee through discharge holes into a collection chamber. The combination of these piercing mechanisms, the cooling/brewing geometry, and the ejection system together form the protected invention.

Why it matters

This patent is foundational to the entire single-serve espresso pod industry. By solving the mechanical problem of how to pierce, brew, and eject a sealed coffee capsule automatically, it enabled companies like Nespresso and others to build reliable, consumer-friendly machines. The innovation removed the mess and skill barrier of traditional espresso preparation, making premium coffee accessible to home users and helping drive a billion-dollar market segment.

Real-world use

Every time you pop a Nespresso capsule into the machine, close the lever, and watch it brew in 30 seconds, you're using the exact piercing and brewing mechanism this patent describes.

Original USPTO abstract

A brewing head includes a lower brewing head part having a first recess and a coffee discharge conduit formed therein. An upper brewing head part has a second recess and a hot water conduit formed therein. The upper brewing head part is pivotable to a closed position in which the first recess and the second recess form a receptacle that receives a coffee portion capsule. A plurality of hollow needles are attached to the upper brewing head part, and are in fluid communication with the hot water conduit. The needles project into the receptacle and are penetratable into a top side of the coffee portion capsule for delivering hot water from the hot water conduit into an interior of the coffee portion capsule when the upper brewing head part is in the closed position. A pyramid plate is located within the first recess and has a plurality of projections formed thereon, and a plurality of discharge holes formed therethrough that communicate the receptacle with the coffee discharge conduit. The projections punch holes through a lower side of the coffee portion capsule, so that the hot water together with dissolved coffee components are discharged through the discharge holes and the coffee discharge conduit, respectively. An ejector device is located within the upper brewing head part for ejecting a used coffee portion capsule.

Patent details

Publication number: US 5,794,519
Filing date: 1995-09-12
Grant date: 1998-08-18
Assignee: Eugster/Frismag Ag
Inventor(s): FISCHER; DANIEL
CPC class: A47J31/3695

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