[특허]Brewing apparatus for preparing foam, froth or crema under low pressure

Electrical & Electronics Ltd.

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Brewing apparatus for preparing foam, froth or crema under low pressure

국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	A47J-031/40 A47J-031/06
미국특허분류(USC)	099/302R; 099/295; 099/323.1
출원번호	US-0407578 (2009-03-19)
등록번호	US-8230776 (2012-07-31)
발명자 / 주소	Chen, Yee Mau Wong, Raymond Wai Ming
출원인 / 주소	Electrical & Electronics Ltd.
대리인 / 주소	Herbster, George A.
인용정보	피인용 횟수 : 1 인용 특허 : 17

초록
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The present invention pertains to a brewing filter apparatus capable of preparing foam, froth, or crema, particularly for coffee beverages, under low pressure. The apparatus can operate at pressures below 15 bar and as low as 1-3 bar. The apparatus comprises a mesh cover, coarse filter, fine filter, large 0-ring, coffee container, small 0-ring, and foam maker having two opposing holes. The holes have a diameter in the range of 0.3 to 1 mm. The crema is created by the turbulent contacting of two opposing jets of coffee, which enter the foam maker through the two opposing holes. To further increase agitation and the surface area for contact, a stainless steel wire mesh may be situated in the center of the foam maker directly in the path of and in between the opposing jets of coffee to facilitate the formation of more crema.

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1. A method of preparing foam, froth, or crema, in a brewing filter apparatus comprising directing two opposing jets of brewed beverage at a pressure less than 15 bar from substantially opposite directions thereby to contact each other in a turbulent manner and situating a mesh between the opposing jets at the point of contact whereby a foam, froth or crema is produced. 2. The method of claim 1 wherein each of the opposing jets is directed at a pressure in the range of 1-3 bar. 3. A brewing filter apparatus including a beverage container, a filter affixed to the beverage container from above, a foam maker affixed to the beverage container from below and a seal intermediate the beverage container and the foam maker, the foam maker comprising a chamber and two holes extending from the exterior to the interior at the chamber for directing beverage into the chamber under pressure in opposite directions and a planar mesh spanning the chamber and facing said two holes thereby to intercept the beverage passing through said two holes and form a beverage foam. 4. The brewing filter apparatus as recited in claim 3 wherein the diameter of each hole in the foam maker ranges from 0.3 to 1 mm. 5. The brewing filter apparatus as recited in claim 3 wherein the mesh includes a plurality of eyes therethrough with a density in the range of 50 to 100 eyes per cm2. 6. The brewing filter apparatus as recited in claim 3 wherein the mesh is made of stainless steel. 7. The brewing filter apparatus as recited in claim 3 wherein the foam maker is made of brass or stainless steel. 8. The brewing filter apparatus as recited in claim 7 wherein the metal is brass. 9. The brewing filter apparatus as recited in claim 3 wherein the form maker is made of polypropylene or glass-filled nylon. 10. The brewing filter apparatus as recited in claim 3 wherein the foam maker is affixed to the beverage container by spot welding or by a bayonet fit whereby the exterior of said foam maker comprises an orifice and the exterior of said foam maker comprises a recess for receiving said orifice. 11. The brewing filter apparatus as recited in claim 3 wherein the foam maker is affixed to the beverage container by a screw fit whereby the exterior of said foam maker comprises threads and the exterior of said beverage container comprises an orifice with corresponding grooves for receiving said threads. 12. The brewing filter apparatus as recited in claim 3 wherein the filter is affixed to the beverage container by press fitting, welding, or brazing. 13. The brewing filter apparatus as recited in claim 12 wherein the filter is made of stainless steel. 14. The brewing filter apparatus as recited in claim 3 wherein the seal comprises an O-ring. 15. The brewing filter apparatus as recited in claim 14 wherein the O-ring is made of an elastomer. 16. The brewing filter apparatus as recited in claim 15 wherein the elastomer is made of silicone rubber. 17. The brewing filter apparatus as recited in claim 3 wherein the filter is a fine filter and the apparatus additionally includes a coarse filter, a mesh cover and a second O-ring wherein the mesh cover, the coarse filter, the fine filter and the second O-ring are affixed to said beverage container from above. 18. The brewing filter apparatus of claim 17 wherein the mesh cover is affixed to the beverage container by a turn-to-lock arrangement. 19. The brewing filter apparatus of claim 17 wherein the coarse filter is made of a suitable metal. 20. The brewing filter apparatus of claim 19 wherein the metal is stainless steel. 21. The brewing filter apparatus of claim 17 wherein the beverage container is made of suitable plastic. 22. The brewing filter apparatus of claim 17 wherein the first and second O-rings are made of an elastomer. 23. The brewing filter apparatus of claim 22 wherein the elastomer is silicone rubber.

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이 특허를 인용한 특허 피인용횟수: 1

Hanneson, Scott Jeffrey; Pfeifer, Thomas Joseph. Capsule machine and components. USP2017079700171.

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Brewing apparatus for preparing foam, froth or crema under low pressure

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Brewing apparatus for preparing foam, froth or crema under low pressure

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이 특허에 인용된 특허 (17)

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