Patent Publication Number: US-2016227958-A1

Title: Small-sized hand-operated pressure coffeepot

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     The present application is a Continuation Application of PCT application No. PCT/CN2014/089158 filed on Oct. 22, 2014, which claims the benefit of Chinese Patent Application No. 201310501985.1 filed on Oct. 23, 2013, the contents of which are hereby incorporated by reference. 
     FIELD OF THE PATENT APPLICATION 
     This application relates to a small-sized hand-operated pressure coffeepot, which can make concentrated coffee by means of simple manual operation, and pertains to the field of daily kitchen utensils. 
     BACKGROUND 
     With continuous improvement of people&#39;s living standards, coffee has been highly integrated into people&#39;s lives. At present, there are many utensils for making coffee, where a water pump pressure coffeepot makes coffee having the highest concentration, the best effect, but with high manufacturing cost, complex structure and relatively large size. 
     SUMMARY 
     In order to conveniently make high-concentration coffee beverage, this application proposes a bran-new technical solution. A small-sized hand-operated pressure coffeepot may produce large pressure by simple manual operation to make high-concentration coffee having rich foams and achieve a good effect of a water pump high pressure coffeemaker. The coffeepot may be suitable to use a coffee capsule or directly use coffee powder. And the coffeepot is wide in range of use, convenient for use, easy to clean, safe and reliable, sanitary and environment-friendly, small and exquisite in shape, convenient for carrying, simple and compact in structure, and low in cost. 
     A small-sized hand-operated pressure coffeepot includes: a pot body, a filter bowl supported on the pot body, a piston-type pressure pump contained in the filter bowl and a coffee box component, where the filter bowl is detachably connected with the pot body, and a cavity of the filter bowl is partitioned, by a middle partition piece, into an upper space for containing hot water and a lower space for containing the coffee box component; the piston-type pressure pump is arranged in the upper space of the filter bowl; a lower end of the piston-type pressure pump penetrates through a through hole at the center of the middle partition piece, and a lower end of a pump body is provided with a one-way water inlet valve communicated with the upper space of the filter bowl and a one-way water outlet valve communicated with the lower space of the filter bowl; the coffee box component includes a coffee powder box and a sleeve sleeved on a periphery of the coffee powder box, the sleeve is in threaded connection with the filter bowl, and the bottom of the coffee powder box is provided with a water outlet hole. 
     The small-sized hand-operated pressure coffeepot of this application may produce large pressure by simple manual operation to make high-concentration coffee having rich foams and achieve a good effect of a water pump high pressure coffeemaker. The coffeepot may be suitable to use a coffee capsule or directly use coffee powder. And the coffeepot is wide in range of use, convenient for use, easy to clean, safe and reliable, sanitary and environment-friendly, small and exquisite in shape, convenient for carrying, simple and compact in structure, and low in cost. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a longitudinal section structure diagram of a small-sized hand-operated pressure coffeepot according to an embodiment of this application; 
         FIG. 2  is a component diagram of a small-sized hand-operated pressure coffeepot according to an embodiment of this application; 
         FIG. 3  is an outside drawing of a small-sized hand-operated pressure coffeepot according to an embodiment of this application; 
         FIG. 4  is an exploded drawing of a part of a small-sized hand-operated pressure coffeepot according to an embodiment of this application; and 
         FIG. 5  is a longitudinal section structure diagram of a small-sized hand-operated pressure coffeepot according to another embodiment of this application. 
     
    
    
     Reference numerals:  100  coffeepot,  10  pot body,  11  bottom cover,  20  filter bowl,  21  middle partition piece,  211  sealing ring,  212  barrier screen,  31  pot lid,  32  pump body,  33  pump cover,  34  piston rod,  35  pump plug,  36  piston,  37  spring,  38  seal ring,  311  outer cylinder,  312  internal cylinder,  321  flange member,  341  handgrip,  351  first ball,  352  choke plug,  353  second ball,  354  elastic retainer ring,  361  piston seal ring,  40  coffee powder box,  41  filter screen,  50  sleeve,  51  water outlet cover,  60  conical pricking pin,  70  coffee capsule,  80  coffee cup. 
     DETAILED DESCRIPTION 
     Detailed description of this application will further be made with reference to drawings and embodiments in order to make the objects, technical solutions and advantages of this application more apparent. It is to be understood that the embodiments described herein are only intended to explain this application, and are not restrictive of this application. 
     As shown in  FIG. 1  to  FIG. 4 , this application provides a small-sized hand-operated pressure coffeepot  100  having upper and lower structures, mainly including: a pot body  10 , a filter bowl  20  supported on the pot body  10 , a piston-type pressure pump contained in the filter bowl  20  and a coffee box component. 
     The bottom of the pot body  10  is provided with a bottom cover  11  for placing a coffee cup  80 . The upper part of the pot body  10  is provided with a supporting structure for supporting and fixing the filter bowl  20  above the bottom cover  11 . Between the bottom cover  11  and the filter bowl  20  there is provided with open space for picking and placing the coffee cup  80 . It is apparent to directly place the filter bowl  20  above the coffee cup  80 . 
     The filter bowl  20  is detachably connected with the pot body  10 , and a cavity of the filter bowl  20  is partitioned, by a middle partition piece  21 , into an upper space for containing hot water and a lower space for containing the coffee box component. A piston-type pressure pump is arranged in the upper space, and a center of the middle partition piece  21  has a through hole. Coffee powder may be placed into the coffee box component. 
     The piston-type pressure pump includes a pot lid  31 , a pump body  32 , a pump cover  33  and a piston rod  34  penetrating through the pump body  32 . The pot lid  31  includes an outer cylinder  311  positioned at an edge of the pot lid  31  and an internal cylinder  312  positioned at a center of the pot lid. An inner circumferential wall of the outer cylinder  311  is in threaded connection with an outer circumferential wall of the filter bowl  20 . Of course, the inner circumferential wall of the outer cylinder  311  also may be connected with the outer circumferential wall of the filter bowl  20  by other means. An upper end of the pump body  32  penetrates through the internal cylinder  312  of the pot lid, the pump cover  33  is fixedly mounted at an upper part of the pump body  32 , and the pump cover  33  is received in the internal cylinder  312  of the pot lid  31  and abuts on an upper end surface at the bottom of the internal cylinder  312 . The pump body  32  is provided with a flange member  321  that abuts on a lower end surface of the internal cylinder  312  of the pot lid, and the pot lid  31  is sandwiched between the flange member  321  of the pump body  32  and the pump cover  33  so that the pot lid  31  and the pump body  32  are connected into an axially-fixed and rotatable component. The lower end of the pump body  32  penetrates through a through hole at the center of the middle partition piece  21 , and the lower end of the pump body  32  is provided with a one-way water inlet valve communicated with the upper space of the filter bowl  20  and allowing water to flow from the upper space of the filter bowl  20  into the pump body  32  and a one-way water outlet valve communicated with the lower space of the filter bowl and allowing water to flow from the inner cavity of the pump body  32  to the lower space of the filter bowl  20 . 
     In the embodiment as shown in  FIG. 1 , the lower part of the pump body  32  is provided with a pump plug  35 , between the pump plug  35  and the pump body  32  there is provided with a sealing ring  38 . The piston rod  34  is limited in the pump body  32  by the pump cover. The lower end of the piston rod  34  is connected with a piston  36 . Between the piston  36  and the pump plug  35  there is provided with a spring  37 . Apparently, the spring  37  merely provides a reset function of the piston  36 . Also the spring  37  may be not provided, instead, the piston  36  is manually lifted to reset. The sealing ring  38  is sleeved on an upper ring groove of the pump plug  35  so that the pump plug  35  hermetically fits to an internal circle of the pump body  32 . The pump body  32  and the pump plug  35  are connected into a whole. 
     The piston  36  is sleeved with a piston sealing ring  361  so that the piston  36  slidably and hermetically fits to the inner wall of the pump body  32 . The lower end of the piston rod  34  is in threaded connection with the piston  36 . The spring  37  abuts between the piston  36  and two end faces at the bottom of the pump body  32  to upward reset the piston  34 . 
     The pump plug  35  penetrates through a through hole of the middle partition piece  21 . The through hole of the middle partition piece  21  is plugged by the pump plug  35  and thus is not marked. And the sealing ring  38  is compressed between an outer periphery of the pump plug  35  and an internal wall of the through hole, and the sealing ring  38  is sleeved on a circular groove at a lower end of the pump plug  35 . The pump plug  35  includes an axial through hole and a side face disposed at a lower part of the pump plug  35  is provided with a transverse through hole, the axial through hole is respectively communicated with an inside of the pump body  32  and the lower space of the filter bowl, the transverse through hole is communicated with the upper space of the filter bowl  20 , a hole mouth at one end of the transverse through hole is a first conical hole mouth whose larger end is toward an inside of the pump plug  35 , the first conical hole mouth is internally provided with a first ball  351 , the first conical hole mouth and the first ball  351  form the one-way water inlet valve, and a hole mouth at the other end of the transverse through hole is provided with a choke plug  352  preventing the first ball  351  from shifting. The choke plug  352  is plugged at the hole mouth of the transverse through hole, which can prevent the first ball  351  from shifting and falling off and can seal up, convenient for processing and assembling. A hole mouth at the lower end of the axial through hole is a second conical hole mouth whose larger end is downward, the second conical hole mouth is internally provided with a second ball  353 , the second conical hole mouth and the second ball  353  form the one-way water outlet valve, and an outlet at the lower end of the axial through hole is further provided with an elastic retainer ring  354  for preventing the second ball  353  from breaking away. 
     The coffee box component comprises a coffee powder box  40  and a sleeve  50  sleeved on a periphery of the coffee powder box  40 . The sleeve  50  is in threaded connection with the inner circumferential wall of the filter bowl  20 . The bottom of the coffee powder box  40  is provided with a water outlet hole having a diameter of about 0.6 mm, and the center of the bottom of the sleeve  50  is provided the water outlet cover  51 . Apparently, the sleeve  50  also may be detachably connected with the filter bowl  20  by a buckle or by other means. As shown in  FIG. 1 , a lower end face of the middle partition piece  21  is provided with a disk-type sealing ring  211 , and a central part of the sealing ring  211  is provided with a barrier screen  212  on the surface thereof a plurality of small holes are uniformly distributed. The barrier screen  212  is used for enabling water in the upper space of the filter bowl  20  to uniformly flow into the coffee powder box. The upper end surface of the sleeve  50  abuts on a flange at an upper mouth of the coffee powder box  40 , and the flange at the upper mouth of the coffee powder box  40  comes into close contact with the sealing ring  211  disposed on the lower end face of the middle partition piece  21  by means of squeezing of the sleeve  50 . In this way, it is implemented the tight coupling between the coffee powder box  40  and the filter bowl. The bottom of the coffee powder box  40  has an annular step, on which there is provided with a filter screen  41  on the surface thereof a plurality of small holes are uniformly distributed. A center of the filter screen  41  is riveted with a pricking pin  60  whose tip is upward, and a center of the barrier screen  212  of the sealing ring  211  is riveted with a pricking pin  60  whose tip is downward. The conical pricking pin  60 , whose tip is downward, riveted at the center of the barrier screen  212  may puncture the upper surface of the coffee capsule  70 . The conical pricking pin  60 , whose tip is upward, riveted at the center of the filter screen  41  may puncture the lower surface of the coffee capsule  70 , so that water may flow, through the punctured holes, into the coffee capsule  70 . In this way, not only the coffee capsule  70  can be used to make coffee, but also ordinary coffee powder can be used to make coffee, that is, it can be used more widely. 
     In this application, the filter bowl  20  is partitioned, by the middle partition piece  21 , into two parts: the upper space and the lower space which is specially provided with the coffee powder box  40 . When coffee is filled, both the sleeve  50  and the coffee powder box  40  are screwed out of the lower end of the filter bowl  20  together, then the coffee powder or the coffee capsule  70  may be filled into the coffee powder box  40 , which is more convenient. After the coffee powder or the coffee capsule  70  is filled, both the sleeve  50  and the coffee powder box  40  are screwed into the lower end of the filter bowl  20  together, and the coffee powder box  40  is tightly pressed by the sleeve  50  on the sealing ring  211  at the lower end of the middle partition piece  21 . In this way, sealing of the coffee powder box  40  and the filter bowl  20  is implemented. In the coffee powder box  40 , high pressure water injected by the piston-type pressure pump is mixed with the coffee powder or the coffee capsule  70 . Because the water outlet hole of the coffee powder box  40  is smaller, the coffee powder box  40  has larger internal pressure so that water can be fully mixed with the coffee powder or the coffee capsule  70  to make high-concentration coffee. Finally, after being filtered by the filter screen  41 , the coffee flows out of the water outlet hole of the coffee powder box  40 . 
     During making coffee, the coffee powder or the coffee capsule  70  is first placed in the coffee powder box  40 , then the coffee powder box  40  is placed on the sleeve  50 , the sleeve  50  is tightly mounted at the bottom end of the filter bowl  20  so that the upper mouth part of the coffee powder box  40  and the disk-type sealing ring  211  of the middle partition piece  21  are compressed tightly. Then the filter bowl  20  is mounted on the pot body  10 , boiling water is poured into the filter bowl  20 , a pot lid  31  is placed, and the piston rod  34  is pressed repeatedly so that the boiling water is pressed into the coffee powder box  40  at the lower part of the filter bowl  20 . In this way, concentrated coffee can be made after filtration. 
     As shown in  FIG. 1 , a center at a lower part of the sleeve  50  is provided with a drum-shaped circle, a center of the drum-shaped circle has a through hole coaxially disposed with respect to a water outlet hole at the bottom of the coffee powder box  40 , a gap is provided between an end face where an upper open part of the through hole is and an end face where a lower open part of the water outlet hole is; a water outlet cover  51  is sleeved at the periphery of the drum-shaped circle, and the upper end at the periphery of the water outlet cover  51  is clamped in a corresponding buttonhole on a bottom plate  52  by a buckle, thereby preventing the water outlet cover  51  from breaking away. A central part at the bottom of the water outlet cover  51  blocks the through hole at the center of the drum-shaped circle, along a periphery at the bottom of the water outlet cover  51  there is provided with multiple holes, and a gap is provided between an end face at the bottom of the water outlet cover  51  and an end face at the bottom of the drum-shaped circle for ease of outflow of water. Because the coffee powder box  40  has larger internal pressure, coffee water flows very fast after flowing through the water outlet hole at the bottom of the coffee powder box  40 . Due to physical effect of fluid, outside air flowing through the gap between the water outlet hole and the through hole is sucked in and is injected, together with the coffee water, into the bottom at the center of the water outlet cover  51 , and then flows out of holes nearby the water outlet cover  51 , to make the coffee produce rich foams. 
     The middle section of the piston rod  34  is a cross-shaped rib structure. The top of the piston rod  34  is provided with a handgrip  341 . The pump cover  33  has a cross-shaped center hole. The cross-shaped rib structure of the piston rod  34  fits with the cross-shaped center hole of the pump cover  33 . When the rib of the piston rod  34  is consistent with the “cross” of the center hole in angle, the piston rod  34  may freely slide axially with respect to the pump cover  33 . When not in use, the piston rod  34  is pressed at the bottom, and the step at the neck of the piston rod  34  abuts on the inner end face of the pump cover  33  by slightly screwing, so that the piston rod  34  will not bounce off, which is convenient for collecting. 
     The pot body part of the coffeepot in this application also may be replaced by a coffee cup  80 . The filter bowl  20  is directly placed above the coffee cup  80 , as shown in  FIG. 5 , which may leave the pot body out, thereby further simplifying the structure. 
     The coffeepot produces very large pressure, which is amount to the pressure of an ordinary water pump high pressure coffeemaker. In general, the inside diameter of the pump body  32  is about 10 mm. If a human hand pressure reaches 12 kilograms, it can be known from theoretical calculation that the pressure may reach 15 standard atmospheric pressures, which is basically equivalent to the maximum working pressure of the high pressure coffeemaker, and coffee made in this way is very high in quality. 
     The coffeepot is very safe although it produces very large pressure. This is because the pressure is controlled artificially, and the pressure is only centralized in very small space inside the coffee powder box. Therefore, it is safe and reliable. 
     The coffeepot is suitable to make 30-100 ml coffee once. The coffeepot is small in size, light in weight, not used of power source, and convenient for carrying. The coffeepot not only can be used indoors, but also can be used in travel or outdoors. Thus the coffeepot is widely used. 
     The pump body of the coffeepot is made of stainless steel. The filter bowl  20  is made of transparent and heat-resistant PC plastic, or glass or ceramic. The coffee powder box  40  and the filter screen  41  are made of stainless steel. The sealing ring is made of silicone rubber. The coffeepot is simple in structure, low in manufacturing cost and high in reliability. 
     The coffeepot is completely manually, and can only be made small-sized due to limitation of physical strength of human body to meet the requirements of a part of users who want to drink coffee but have no special high pressure coffeemaker for the moment. 
     Of course, this application may also have many other embodiments. Those skilled in the art may make various corresponding changes and transformations according to this application without departing from the spirit and essence of this application. And these corresponding changes and transformations shall fall within the scope of protection of the appended claims of this application.