Portable coffee extraction device

Abstract

This invention relates to a portable coffee extraction device, comprising a main body, a pressure seat, and a siphon seat. The main body has a chamber, a guide tube, and a retaining ring. The pressure seat is combined with the main body and located within the chamber, and has an open end, a closed end, and several water inlets. The siphon seat is detachably combined with the retaining ring of the main body. The siphon seat has a flow-guiding protrusion protruding upward at its center, which can extend into the guide tube. A connecting groove is formed on the outer periphery of the flow-guiding protrusion. The siphon seat has a support ring protruding on its top surface. Several siphon tubes penetrating the top and bottom surfaces of the siphon seat are provided between the support ring and the connecting groove. This invention provides a portable coffee extraction device with a simple structure, convenient use, and enhanced coffee flavor.

Claims

1. A portable coffee extraction device, comprising a main body, a pressure seat, and a siphon seat, wherein: The main body has an internal chamber for filling coffee powder. An opening communicating with the chamber is located on the top surface of the main body. A guide tube with an inner diameter smaller than the inner diameter of the chamber protrudes downwards from the bottom of the main body and communicates with the chamber. A retaining ring is arranged downwards around the outer periphery of the guide tube. A filter plate with several filter holes is located between the chamber and the guide tube. A pressure seat is attached to the main body and located within the chamber, pressing down on the filled coffee powder. The pressure seat has an open end, a closed end, and several water inlets. The open end is located at the top of the pressure seat, and the closed end is located at the bottom. The water inlets pass through the closed end of the pressure seat, are spaced apart, and communicate with the open end. The diameter of each water inlet is larger than the diameter of each filter hole. A siphon seat is detachably attached to the retaining ring of the main body. The siphon seat has a centrally located, upward-protruding drainage protrusion that extends into the guide tube. An annular connecting groove is formed on the outer periphery of the drainage protrusion, so that the guide tube is located in the connecting groove. The siphon seat has a top surface with a support ring that surrounds the outer periphery of the connecting groove. The top of the drainage protrusion is higher than the height of the support ring, so that the drainage protrusion extends out of the top surface of the siphon seat. The siphon seat has several siphon tubes that penetrate the top and bottom surfaces of the siphon seat between the support ring and the connecting groove.

2. The portable coffee extraction device as described in claim 1, wherein the locking ring has a plurality of spaced locking grooves and notches, each locking groove radially penetrating the locking ring, and each notch penetrating the bottom end of the locking ring and communicating with one of the locking grooves, the siphon seat has a number of locking ribs radially protruding outward on its outer surface, the same number as the number of locking grooves of the locking ring, each locking rib entering the corresponding locking groove through a notch, and as the siphon seat rotates relative to the body, each locking rib engages with the corresponding locking groove, thereby securely connecting the siphon seat to the body, and allowing the abutment ring to abut against the bottom of the body.

3. The portable coffee extraction device as described in claim 2, wherein the chamber is connected to the guide tube through the plurality of filter holes, the main body is provided with a placement slot between the chamber and the guide tube, and the filter is disposed in the placement slot.

4. The portable coffee extraction device as claimed in claim 3, wherein the filter pores of the filter plate are gradually expanded from top to bottom, such that the diameter of each filter pore at the upper end is smaller than the diameter of the filter pore at the lower end.

5. The portable coffee extraction device as claimed in claim 3, wherein the filter pores of the filter plate are tapered from top to bottom, such that the diameter of each filter pore at the upper end is larger than the diameter at the lower end.

6. The portable coffee extraction device as claimed in claim 3, wherein each of the filter holes of the filter is in the form of a polygonal hole.

7. The portable coffee extraction device as described in any one of claims 2 to 6, wherein the siphon seat has an annular groove recessed on the outer surface between the top surface and each of the retaining ribs, and an airtight ring is fitted in the groove, wherein when the siphon seat is combined with the body, the airtight ring abuts against the inner surface of the retaining ring.

8. The portable coffee extraction device as claimed in claim 7, wherein the body is a tapered cylinder that tapers from top to bottom, such that the body can abut against the inner surface of a cup.

9. The portable coffee extraction device as claimed in claim 8, wherein the siphon seat has a plurality of spaced-apart push ribs on the outer surface below each of the locking protrusions, allowing the user to assemble or disassemble the siphon seat by rotating it relative to the main body using each of the push ribs.

10. The portable coffee extraction device as claimed in claim 9, wherein the inner diameter of each siphon tube tapers from the top surface of the siphon seat toward the bottom surface.

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