CN206390768U - A kind of coffee maker brew device - Google Patents
A kind of coffee maker brew device Download PDFInfo
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- CN206390768U CN206390768U CN201621121393.2U CN201621121393U CN206390768U CN 206390768 U CN206390768 U CN 206390768U CN 201621121393 U CN201621121393 U CN 201621121393U CN 206390768 U CN206390768 U CN 206390768U
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- inner chamber
- preimpregnation
- coffee
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Abstract
The utility model discloses a kind of coffee maker brew device, including brewing head assembly and filtering Handleset manually, brewing head assembly manually includes brewing seat, preimpregnation valve casing and operation rod, with automatic heat preserving, presoaks function automatically, automatic heat insulating function makes brew head be maintained at optimal soaking temperature；Automatic preimpregnation function is beneficial to effective extraction of coffee cake；In brew head after water distribution of the hot water finally by sprinkler cover and point network of rivers, even into coffee cake whole region, it is ensured that the extraction of effective, high-grade coffee.Head assembly is brewed to be manually operated, it is natural, pseudo-classic, barista can be made by consummate, trickle technical movements control, to meet the mouthfeel demand of all kinds of personages in operation.Filtering Handleset includes base, handle, filter, filter, valve body, spring, rubber cushion seat and rubber cushion, there is filtering Handleset ground coffee capacity can adjust, the function of pressure adjustable section, without changing the extraction that powder bowl just can be suitably used for the ground coffee of various components.
Description
Technical field
The utility model is related to espresso machine field, more particularly to a kind of coffee maker brew device.
Background technology
With the improvement of living standards, coffee is increasingly becoming drink common in people's life, therefore to the need of coffee machine
Ask increasing.Espresso machine passes rapidly through layer of coffee using the mixture of high steam and water, and moment extracts coffee, this
The coffee temperature that sample comes out is very high, and the content of the impurity such as caffeine is very low, and mouthfeel is strong.It is used for coffee in espresso machine
The important component of extraction is brew head, in brewing coffee, is directly uniformly to be immersed by liquid outlet using high-temperature-hot-water mostly
Oozed again after ground coffee in coffee, but its manufacturing process, if the hot water momentary action of high pressure is to coffee cake surface, to coffee
Extraction be unfavorable, cause coffee quench take not exclusively, it is difficult to meet user drinks requirement.
Moreover, the powder bowl for being used to place in the filtering Handleset of ground coffee being connected with brew head is needed by ground coffee
Amount select, a powder bowl can not meet the installation extraction of the ground coffee of different components；When filtering Handleset goes out coffee, and
Pressure regulation can not be carried out.
Utility model content
Main purpose of the present utility model, which is to provide one kind, can automatically presoak, sprinkle water uniformly, effectively be extracted beneficial to coffee cake,
Ground coffee capacity is adjustable, the adjustable coffee maker brew device of internal pressure.
The utility model proposes a kind of coffee maker brew device, including head assembly and filtering Handleset, institute are brewed manually
State and brew head assembly manually and include brewing seat, preimpregnation valve casing and operation rod, it is described brew that seat includes being disposed over the
One inner chamber, in the water inlet connected with first inner chamber and water return outlet, the second inner chamber being arranged in the first inner chamber, set
The 3rd inner chamber putting below second inner chamber and connected with second inner chamber, be arranged on the 3rd inner chamber side brew head and use
In the communicating passage for connecting the 3rd inner chamber and brew head, the filtering Handleset and the brew head detachable connection,
It is described brew seat be located at the 3rd inner chamber below be connected with preimpregnation valve casing, it is described preimpregnation valve casing in be provided with and the 3rd
The preimpregnation chamber of inner chamber connection with connect in the pressure-releasing chamber presoaked below chamber, below the pressure-releasing chamber being provided with pressure release goes out
Mouthful；
The water inlet, the water return outlet are connected with boiler, and the hot water in the boiler enters first from the water inlet
Inner chamber, is heated to brew head, and because of thermosyphon effect, hot water is in boiler, water inlet, first inner chamber, water return outlet, boiler
Self-assembling formation thermal cycle, makes brew head be maintained at optimal soaking temperature；
The brew head inner bottom part is provided with connection boss, sprinkler cover, the company are installed on the connection boss
The delivery port of circulation passage is located on the connection boss and positioned at the sprinkler cover rear, the water entered from the communicating passage from
Sprinkler cover flows out；Be covered with point network of rivers below sprinkler cover on the connection boss, the described point of network of rivers by screw and
The sprinkler cover is connected；
Water intaking valve is provided with the second inner chamber, the water intaking valve includes water intaking valve push rod and (the first back-moving spring；
The preimpregnation intracavitary is provided with preimpregnation valve, the preimpregnation valve includes preimpregnation valve push rod and second back-moving spring；In the pressure release
Intracavitary is provided with relief valve, and the relief valve includes relief valve push rod and the 3rd back-moving spring；The operation rod includes inclined
The cam of the heart, the camshaft being connected with the cam, the handle spring on the camshaft and with the camshaft connect
The operating handle connect, the cam is placed in the 3rd inner chamber, and the operating handle controls the cam rotation；
When the operating handle is in the closed position, the water intaking valve is closed, and hot water can not enter the from second inner chamber
Three inner chambers, the cam pushes the preimpregnation valve push rod and the relief valve push rod, and the preimpregnation valve and the relief valve are beaten
Open；When the operating handle is in an open position, water intaking valve push rod described in the cam rotation to jack-up discharges the preimpregnation
Valve push rod, the water intaking valve is opened, and the preimpregnation valve and the relief valve are closed, and hot water enters second inner chamber from first inner chamber,
Enter the 3rd inner chamber and communicating passage from second inner chamber again, finally from communicating passage water outlet, pass through the sprinkler cover and point network of rivers
Water distribution, even into the filtering Handleset equipped with coffee cake, pressure gradually rises；
When pressure is more than 1.5 atmospheric pressure, the preimpregnation valve push rod is progressively pressed downward because of internal pressure increase, and the preimpregnation valve is opened
Logical, hot water enters the 4th inner chamber；Before hot water fills the 4th inner chamber, be placed in it is described filtering Handleset in coffee cake by
The hot water preimpregnation of 1.5 atmospheric pressure；It is filled with the 4th inner chamber, heat hydraulic pressure restarts to rise, realizes automatic preimpregnation；
The filtering Handleset includes base, the handle being connected with the base, the filtering in the base
Device, the filter in the filter, being used in the filter, which press, puts the jump ring of the filter, connects
It is connected on the valve body below the base, the spring in the valve body, the rubber cushion being pressed on spring seat and installs
Rubber cushion on rubber cushion seat, the filter includes bowl-shape filtering container and is arranged on below the bowl-shape filtering container
The connector of hollow tubular, the filter is arranged in the bowl-shape filtering container, and the bottom of the bowl-shape filtering container is set
There is the Coffee outlet for being communicated to the connector, the internal diameter of the base is adapted to the bowl-shape filtering container, the bowl-shape mistake
Container and base combination formation ground coffee placed cavity are filtered, the outside wall surface of the connector is provided with outer wall thread, the bottom
The bottom of seat is provided with the interface being adapted to the connector, and the internal face of the base interface is provided with suitable with the outer wall thread
The internal thread matched somebody with somebody, is connected, the filter is fastened on the base by the connector with the base interface thread
Interior, the length of the connector is more than the base interface, by the link position of the connector and the base interface come
Height of the bowl-shape filtering container in the base is adjusted, so as to adjust the capacity of ground coffee placed cavity；
The valve body upper port is adapted to the connector, and is provided with and the outer wall in the valve body upper port internal face
The internal thread of screw thread matching, the valve body is connected through a screw thread with the connector, and the rubber cushion and the rubber cushion seating are in institute
State in connector, the rubber cushion is blocked in the Coffee outlet, the valve body and institute can be adjusted by the rotation of the valve body
The link position of connector is stated, so that the spacing between the rubber cushion and the Coffee outlet is adjusted, to adjust pressure.
Preferably, the filtering Handleset is that rotary buckle is connected with the brew head, in the outside wall surface of the base
At least two clamping sides are provided with, at least two flangings are provided with the port of the brew head, are provided between adjacent folds
The entrance being adapted to the clamping side, the clamping side enters from the corresponding entrance, and by rotation, makes the clamping side
Fix on the corresponding flanging, the filtering Handleset is connected in the brew head.
Coffee maker brew device of the present utility model has the beneficial effect that：
The brew head of coffee maker brew device of the present utility model has automatic heat preserving, presoaks function automatically, automatic heat preserving
Function makes brew head be maintained at optimal soaking temperature；Automatic preimpregnation function is beneficial to effective extraction of coffee cake；Moreover, in brew head
After water distribution of the hot water finally by the unique sprinkler cover of shape and point network of rivers, highly uniform entrance coffee cake whole region, it is ensured that have
Effect, the extraction of high-grade coffee.
Brew head is natural, pseudo-classic to be manually operated, can make barista in operation by superb, trickle skill
Art acts control, meets the mouthfeel demand of all kinds of personages.
Point network of rivers is connected by screw fixation, easy to operate, can be rapidly completed the demolition, installation in point network of rivers, and dismounting
A point network of rivers will not be damaged in journey.
There is filtering Handleset ground coffee capacity can adjust, the function of pressure adjustable section, without changing powder bowl just
It can be suitably used for the extraction of the ground coffee of various components.
Brief description of the drawings
Fig. 1 is the sectional view for brewing head assembly manually of coffee maker brew device of the present utility model；
Fig. 2 is the structural representation of the filtering Handleset of coffee maker brew device of the present utility model；
Fig. 3 is the sectional view of the filtering Handleset of coffee maker brew device of the present utility model；
Fig. 4 cuts open for the combination for brewing head assembly and filtering Handleset manually of coffee maker brew device of the present utility model
View.
Realization, functional characteristics and the advantage of the utility model purpose will be described further referring to the drawings in conjunction with the embodiments.
Embodiment
It should be appreciated that specific embodiment described herein is not used to limit this only to explain the utility model
Utility model.
Referring to figs. 1 to Fig. 4, an embodiment of coffee maker brew device of the present utility model is proposed：
A kind of coffee maker brew device, including head assembly and filtering Handleset 8 are brewed manually.Brew head assembly bag manually
Include and brew seat, preimpregnation valve casing and operation rod, brew the first inner chamber 1 that seat includes being disposed over --- constant temperature chamber, with
Water inlet and water return outlet that first inner chamber 1 is connected, the second inner chamber 2 that is arranged in first inner chamber 1 --- intake antrum, it is arranged on the
The lower section of two inner chamber 2 and connect with second inner chamber 2 the 3rd inner chamber 3, be arranged on the 3rd inner chamber 3 side brew head 6 and use
In the inner chamber 3 of connection the 3rd and the communicating passage 61 of brew head 6.Water return outlet is located at below water inlet.Handleset 8 is filtered with brewing
First 6 detachable connection, preimpregnation valve casing is connected with the lower section positioned at the 3rd inner chamber 3 for brewing seat, is set in preimpregnation valve casing
There is the pressure-releasing chamber 5 of the preimpregnation chamber 4 connected with the 3rd inner chamber 3 and connection below preimpregnation chamber 4, be provided with and let out below pressure-releasing chamber 5
Extrude mouth 52.
Water inlet, water return outlet are connected with boiler.As shown in A routes in Fig. 1, the hot water in boiler enters first from water inlet
Inner chamber 1, is heated to brew head, hot water temperature's reduction after heat-shift in first inner chamber 1, because of thermosyphon effect, cooling
Hot water produce downward flowing, from water return outlet flow back to boiler.Hot water is from water inlet → 1 → water return outlet of first inner chamber → boiler
Middle self-assembling formation thermal cycle glide path A, realizes automatic heat preserving, brew head is maintained at optimal soaking temperature.
The inner bottom part of brew head 6 is provided with connection boss, the delivery port of communicating passage 61 is located on connection boss, in connection
A point water assembly is covered with boss, point water assembly includes housing, is placed in the sprinkler cover 62 of outer inframe and is covered in sprinkler cover 62
Point network of rivers 63.
The inner bottom part of brew head 6 is provided with connection boss, sprinkler cover 62 is installed on connection boss, communicating passage 61
Delivery port is located on connection boss and positioned at the rear of sprinkler cover 62, and the water entered from communicating passage 61 flows out from sprinkler cover 62.
The high-accuracy point of network of rivers 63 positioned at the lower section of sprinkler cover 62 is covered with connection boss, point network of rivers 63 is connected by screw with sprinkler cover 62
Fixation is connect, is provided between point network of rivers 63 and connection boss for strengthening the cushion rubber of sealing.Point network of rivers 63 is connected by screw
Fixation is connect, it is easy to operate, the demolition, installation in point network of rivers 63 can be rapidly completed, and point network of rivers 63 will not be damaged in disassembly process.
Water intaking valve is provided with second inner chamber 2, water intaking valve includes water intaking valve push rod 21 and (the first back-moving spring.In preimpregnation
Preimpregnation valve is provided with chamber 4, preimpregnation valve includes preimpregnation valve push rod 41 and second back-moving spring.Pressure release is provided with pressure-releasing chamber 5
Valve, relief valve includes the back-moving spring of relief valve push rod 51 and the 3rd.Operation rod includes eccentric cam 71, connected with cam 71
The camshaft connect, the handle spring on camshaft and the operating handle 7 being connected with camshaft, cam 71 are placed in the 3rd
In chamber 3, the control cam 71 of operating handle 7 is rotated.
When operating handle 7 is in the closed position, water intaking valve is closed, and hot water can not enter the 3rd inner chamber from second inner chamber 2
3, cam 71 will presoak valve push rod 41 and relief valve push rod 51 is pushed, and preimpregnation valve and relief valve are opened.
When operating handle 7 is in an open position, cam 71 turns to jack-up water intaking valve push rod 21, release preimpregnation valve push rod
41, water intaking valve is opened, and preimpregnation valve and relief valve are closed, and B routes are to brew hot water route in such as Fig. 1：Hot water enters from first inner chamber 1
Enter second inner chamber 2, then enter the 3rd inner chamber 3 and communicating passage 61 from second inner chamber 2, finally from the water outlet of communicating passage 61, pass through
Sprinkler cover 62 and the water distribution in point network of rivers 63, even into the filtering Handleset 8 equipped with coffee cake.This product is by the 4th
The setting of chamber, sets up process slow down pressure, gradually rises pressure.
As C routes are into presoaking the route of chamber 4 in Fig. 1：When pressure is more than 1.5 atmospheric pressure, preimpregnation valve push rod 41 is because of internal pressure
Increase is progressively pressed downward, and preimpregnation valve is open-minded, and hot water enters the 4th inner chamber；Before hot water fills the 4th inner chamber, filtering hand is placed in
Coffee cake in handle component 8 is presoaked by the hot water of 1.5 atmospheric pressure；It is filled with the 4th inner chamber, on heat hydraulic pressure restarts
Rise, realize automatic preimpregnation, effectively extracted beneficial to coffee.The coffee liquid of extraction flows out from filtering Handleset 8.
In brew head after water distribution of the hot water finally by the unique sprinkler cover 62 of shape and point network of rivers 63, highly uniform entrance coffee
Coffee cake whole region, it is ensured that the extraction of effective, high-grade coffee.
Connecting pipe is tortuous narrow and small pipeline, and hot water is from boiler through water inlet to first inner chamber 1, second inner chamber the 2, the 3rd
A point water assembly is arrived in inner chamber 3 again, to undergo tortuous narrow and small pipeline, and these pipelines serve good metering function.
After the completion of coffee making, operating handle 7 is turned into closed position, water intaking valve push rod 21 is discharged, entered by cam 71
Water valve is closed, while cam 71 pushes preimpregnation valve push rod 41 and relief valve push rod 51, relief valve is open-minded, in the 3rd inner chamber the 3, the 4th
The hot water for having pressure in inner chamber, communicating passage 61 and brew head 6 is discharged to coffee machine Water tank from pressure relief vent 52.
Filtering Handleset 8 is that rotary buckle is connected with brew head 6, provided with least two cards in the outside wall surface of base 81
Edge fit 85, at least two flangings are provided with the port of brew head 6, are provided between adjacent folds and entering that clamping side 85 is adapted to
Mouthful, clamping side 85 enters from corresponding entrance, and by rotation, clamping side 85 is fixed on corresponding flanging, make filtering hand
Handle component 8 is connected in brew head 6.
Filtering Handleset 8 includes base 81, the handle 89 being connected with base 81, the filter in base 81
82nd, O-ring seal, the filter 83 in filter 82, being used in filter 82 press and put filter 83
Jump ring 84, the valve body 88 for being connected to the lower section of base 81, the spring 881 in valve body 88, the rubber cushion being pressed on spring 881
Seat 882 and the rubber cushion 883 on rubber cushion seat 882.Filter 82 includes bowl-shape filtering container 821 and is arranged on bowl-shape filtering
The connector 87 of the hollow tubular of the lower section of container 821, filter 83 is arranged in bowl-shape filtering container 821, bowl-shape filtering container
821 bottom is communicated with to the Coffee outlet 86 of connector 87.The internal diameter of base 81 is adapted to bowl-shape filtering container 821, bowl
Shape filtering container 821 combines to form ground coffee placed cavity 811 with base 81.The outside wall surface of connector 87 is provided with outer wall thread,
The bottom of base 81 is provided with the interface being adapted to connector 87, and the internal face of the interface of base 81 is provided with what is be adapted to outer wall thread
Internal thread, is connected, filter 82 is fastened in base 81 by connector 87 with the interface thread of base 81, connector 87
Length is more than the interface of base 81, and bowl-shape filtering container 821 is adjusted by the link position of connector 87 and the interface of base 81 and is existed
Height in base 81, so as to adjust the capacity of ground coffee placed cavity 811.
The upper port of valve body 88 is adapted to connector 87, and is provided with what is matched with outer wall thread in the upper port internal face of valve body 88
Internal thread, valve body 88 is connected through a screw thread with connector 87, and rubber cushion 883 and rubber cushion seat 882 are placed in connector 87, rubber cushion 883
Coffee outlet 86 is blocked in, can be by the rotation of valve body 88 come regulation valve body 88 and the link position of connector 87, so as to adjust
Spacing between rubber cushion 883 and Coffee outlet 86, to adjust pressure.
There is filtering Handleset 8 ground coffee capacity can adjust, the function of pressure adjustable section, without changing powder bowl just
It can be suitably used for the extraction of the ground coffee of various components.
Preferred embodiment of the present utility model is the foregoing is only, the scope of the claims of the present utility model is not thereby limited,
The equivalent structure transformation that every utilization the utility model specification and accompanying drawing content are made, or directly or indirectly it is used in other phases
The technical field of pass, is similarly included in scope of patent protection of the present utility model.
Claims (2)
1. a kind of coffee maker brew device, including head assembly and filtering Handleset are brewed manually, it is characterised in that it is described manual
Brewing head assembly includes brewing seat, preimpregnation valve casing and operation rod, it is described brew first inner chamber that seat includes being disposed over,
The water inlet and water return outlet that are connected with the first inner chamber, the second inner chamber being arranged in the first inner chamber, it is arranged on second
The 3rd inner chamber that connect below inner chamber and with second inner chamber, be arranged on the 3rd inner chamber side brew head and for connection the
Three inner chambers and the communicating passage of brew head, the filtering Handleset and the brew head detachable connection, are brewed described
Being located at below the 3rd inner chamber for seat is connected with preimpregnation valve casing, is provided with and is connected with the 3rd inner chamber in the preimpregnation valve casing
Preimpregnation chamber with connect it is described preimpregnation chamber below pressure-releasing chamber, be provided with pressure relief vent below the pressure-releasing chamber；
The water inlet, the water return outlet are connected with boiler；
The brew head inner bottom part is provided with connection boss, sprinkler cover is installed on the connection boss, the connection is led to
The delivery port in road is located on the connection boss and positioned at the sprinkler cover rear, and the water entered from the communicating passage is from watering
Lid outflow；Be covered with point network of rivers below sprinkler cover on the connection boss, the described point of network of rivers by screw with it is described
Sprinkler cover is connected；
Water intaking valve is provided with the second inner chamber, the water intaking valve includes water intaking valve push rod and (the first back-moving spring；Institute
State preimpregnation intracavitary and be provided with preimpregnation valve, the preimpregnation valve includes preimpregnation valve push rod and second back-moving spring；In the pressure-releasing chamber
Relief valve is provided with, the relief valve includes relief valve push rod and the 3rd back-moving spring；The operation rod includes eccentric
Cam, the camshaft being connected with the cam, the handle spring on the camshaft and it is connected with the camshaft
Operating handle, the cam is placed in the 3rd inner chamber, and the operating handle controls the cam rotation；
The filtering Handleset includes base, the handle being connected with the base, the filter in the base, peace
Filter in the filter, being used in the filter, which press, puts the jump ring of the filter, is connected to
Valve body below the base, the spring in the valve body, the rubber cushion being pressed on the spring seat and installed in institute
The rubber cushion on rubber cushion seat is stated, the filter includes bowl-shape filtering container and is arranged on hollow below the bowl-shape filtering container
The connector of tubulose, the filter is arranged in the bowl-shape filtering container, and the bottom of the bowl-shape filtering container is provided with company
The Coffee outlet of the connector is passed to, the internal diameter of the base is adapted to the bowl-shape filtering container, and the bowl-shape filtering is held
Device is provided with outer wall thread with base combination formation ground coffee placed cavity, the outside wall surface of the connector, the base
Bottom is provided with the interface being adapted to the connector, and the internal face of the base interface is provided with what is be adapted to the outer wall thread
Internal thread, is connected, the filter is fastened in the base, institute by the connector with the base interface thread
The length for stating connector is more than the base interface, by the link position of the connector and the base interface to adjust
Height of the bowl-shape filtering container in the base is stated, so as to adjust the capacity of ground coffee placed cavity；
The valve body upper port is adapted to the connector, and is provided with and the outer wall thread in the valve body upper port internal face
The internal thread of matching, the valve body is connected through a screw thread with the connector, and the rubber cushion and the rubber cushion seating are in the company
In joint, the rubber cushion is blocked in the Coffee outlet, and the valve body and the company can be adjusted by the rotation of the valve body
The link position of joint, so that the spacing between the rubber cushion and the Coffee outlet is adjusted, to adjust pressure.
2. a kind of coffee maker brew device according to claim 1, it is characterised in that the filtering Handleset with it is described
Brew head connects for rotary buckle, at least two clamping sides is provided with the outside wall surface of the base, at the end of the brew head
It is intraoral to be provided with least two flangings, the entrance being adapted to the clamping side, clamping side slave phase are provided between adjacent folds
The entrance answered enters, and by rotation, makes the clamping checkpost solid on the corresponding flanging, make the filtering handle
Component is connected in the brew head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621121393.2U CN206390768U (en) | 2016-10-13 | 2016-10-13 | A kind of coffee maker brew device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621121393.2U CN206390768U (en) | 2016-10-13 | 2016-10-13 | A kind of coffee maker brew device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206390768U true CN206390768U (en) | 2017-08-11 |
Family
ID=59508247
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621121393.2U Active CN206390768U (en) | 2016-10-13 | 2016-10-13 | A kind of coffee maker brew device |
Country Status (1)
| Country | Link |
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| CN (1) | CN206390768U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111163669A (en) * | 2017-08-07 | 2020-05-15 | 斯宾控股私人有限公司 | Centrifugal coffee brewing machine |
| CN114983232A (en) * | 2022-06-17 | 2022-09-02 | 孟庆楷 | Labor-saving piston capable of continuously and automatically supplying water, pressurizing by piston and combining pneumatic and water pump |
-
2016
- 2016-10-13 CN CN201621121393.2U patent/CN206390768U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111163669A (en) * | 2017-08-07 | 2020-05-15 | 斯宾控股私人有限公司 | Centrifugal coffee brewing machine |
| US11576518B2 (en) | 2017-08-07 | 2023-02-14 | Spinn Holding B.V. | Centrifugal coffee brewer and method of using same |
| US11889942B2 (en) | 2017-08-07 | 2024-02-06 | Spinn Holding B.V. | Centrifugal coffee brewer and method of brewing coffee with same |
| CN114983232A (en) * | 2022-06-17 | 2022-09-02 | 孟庆楷 | Labor-saving piston capable of continuously and automatically supplying water, pressurizing by piston and combining pneumatic and water pump |
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