The Clover Coffee Machine, Here’s how it works

The Clover coffeemaker debuted in a handful of cafés in 2006 and was promptly hailed as the best thing to happen to coffee lovers since the car cup holder. With an $11,000 asking price, the Clover has become a fetish object among the coffee- obsessed. Long queues signal its arrival in new cities, and selfdescribed “ Cloveristas” post videos on YouTube demonstrating the machine’s flashy brewing process. There are more photos on Flickr paying homage to this shiny gadget (700 and counting) than actual Clovers in existence (roughly 250 worldwide).

The Clover is the first coffeemaker that lets the user program three key variables: dose, water temperature, and brew time. (Example: 37.5 grams of Brazilian Fazenda São João at 204 degrees for 43 seconds.) After the coffee steeps, a piston mechanism extracts the liquid from spent beans, resulting in a fresh cuppa in less than a minute. A filter platform pops a hockey puck of grounds out of the top, where it’s easily wiped away. An Ethernet port connected to an online database is designed to let users save favorite recipes for specific beans. Made of stainless steel and copper, a single Clover typically takes several hours to assemble by hand.

Clover looks like just another countertop coffee machine. But peek under the hood and you’ll find an innovative brewing system. Here’s how it works: 1. A barista selects dose, water temperature, and steep time. 2. A piston pulls down the filter platform while freshly ground coffee is poured into the chamber. 3. Hot water flows into the chamber. 4. The barista briskly stirs the grounds with a whisk, and the water and beans steep for several seconds. 5. The piston rises, creating a vacuum that separates the brew from the grounds, then lowers, forcing the joe out of a nozzle below. 6. The piston rises to the surface again, pushing up a disc of grounds, which are squeegeed away. (source : mathew honan, wired.com)