Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
  • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
  • F04B9/14—Pumps characterised by muscle-power operation
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
  • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
  • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
  • B05B11/1001—Piston pumps
  • B05B11/1023—Piston pumps having an outlet valve opened by deformation or displacement of the piston relative to its actuating stem

Definitions

• the present invention relates to the manually operated pump for discharging small amount with improved interior structure. More particularly, the invention relates to provide the manually operated pump to perform the function to the pump using just one spring by changing the structure of shaft and piston in the conventional manually operated pump, of which discharge rate is less than 0.2 cc per one time, and in some cases, to provide the manually operated pump for discharging small amount, in which the function of the pump and manufacturing cost is improved by reducing the number of constituent parts by integrating the housing cap and cover and changing the integrated cover into special structure.
• the manually operated pump for discharging small amount is the manually operated pump, in which the discharge rate by pumping is approximately 0.2 cc per one time, and which can be used when discharging the liquid or emulsion type contents filled in the vessel quantitatively by pumping.
• Such a pump is widely used secured in the cosmetic vessel and the like due to its convenience.
• Fig. 1 shows a representative example of the conventional manually operated pump for discharging small amount.
• the conventional pump comprises: a cylindrical housing (20) forming the exterior surface of the pump; a shaft (30) having the liquid passage therein; a cylindrical piston (40) reciprocating along the interior surface of the housing (20); a housing cap (25) securing the housing (20) and the cover (not shown) while guiding the reciprocating motion of the shaft (30); a conical pedestal (32) secured in the lower end of the shaft (30); a upper spring (52) positioned in the upper end of the piston (40); a lower spring (54) fitted in the conical pedestal (32); a ball (60) positioned in the lower part of the housing (20); and a tube (80) secured in the lower end of the housing and the like.
• a pump is secured to the vessel (not shown) filled with the contents by using the cover (not shown) with the screw groove formed therein.
• the spring force of the upper spring (52) is greater than that of the lower spring
• Such a conventional pump requires two springs.
• the upper spring (52) provided in the upper part of the piston (40) renders the piston (40) to be engaged with the conical pedestal (32) when the shaft (30) moves up and down, so that the spring (52) makes the contents in the inner space (22) of the cylinder pressurized in the downward movement of the shaft (30) and also makes the decrease of the pressure occurred in the inner space (22) of the cylinder and in the upward movement of the shaft (30).
• housing cap (25) renders the upper part of the housing closed off and the shaft (30) secured in the housing (20) while the housing cap (25) guiding the reciprocating motion of the shaft (30).
• the upper spring (52) and the housing cap (25) are the inevitable components in the conventional manually operated pump for discharging small amount.
• the size of the parts constituting the pump has to be smaller and the precise structure is required, there has been difficulty of the manufacturing process. And the more articles the customer requires, the more the number of parts constituting the pump tends to be increased. Therefore, the possibility of wrong operation during the use of pump becomes more and more due to the increase of the parts.
• an object of the invention is to solve the problems of such conventional technique. More particularly, the object of the invention is to perform the original function of the pump without upper spring by changing the structure of the shaft and the piston in the conventional, manually operated pump in which the discharge rate is approximately 0.2cc per one time.
• further object of the present invention is to reduce the number of the total parts to simplify the manufacturing process and reduce the possibility of the wrong operation and further perform more improved function, by integrating the housing cap, cover etc, and changing the structure to have these parts simultaneously to perform further functions.
• the manually operated pump for discharging small amount in which the discharge rate is approximately 0.2cc per one time by pumping, is characterized in that the pump comprising: a cylindrical housing forming the exterior surface of the pump; a shaft having the liquid passage therein and integrated with the conical pedestal in the lower end of the shaft; a cylindrical piston reciprocating along the interior surface of the housing; a housing cap securing housing in the cover while guiding the reciprocating motion of said shaft: a spring fitted in the lower end of said conical pedestal; a ball positioned in the lower end of the housing: a tube secured in the lower end of the housing; and the cover having the screw groove therein and secured in said housing cap and the like; wherein in the shaft, the length of the corresponding part of the shaft abutted in contact with the interior surface of the piston having relatively small diameter to slide with said interior surface, is longer than that of the interior surface of the piston; and wherein said piston has dual structure having the interior surface abutted on the piston and the exterior
• the difference between the friction force between the exterior surface of the piston and the interior surface of the housing, and the friction force between the interior surface of the piston and the shaft is preferably resulted from the difference of the contact area. That is, the area in which the exterior surface of the piston abuts with the interior surface of the hosing is greater than that in which the interior surface of the piston abuts with the shaft. In case of the same quality of material and the same unevenness of the surface, the friction force proportionally increases due to the difference of the contact area.
• Such manually operated pump according to the present invention is characterized in that the present pump performs the same function as the conventional manually operated pump for discharging small amount using two springs, by using just one spring positioned between the ball and the conical pedestal of the lower end of the shaft. It is because the structure of the shaft and the piston is absolutely different from that of the conventional shaft and the piston as mentioned above.
• the invention is preferably characterized in the manually operated pump for discharging small amount in which the said hosing cap is integral with the cover.
• the invention does not require the individual housing cap because the inner cylindrical bending part having a circumferential part and a circumferential groove coaxially with said shaft was integrated with the upper end of said shaft.
• the inner cylindrical bending part guides the reciprocating motion of the shaft and closes off the inner space of the housing instead of the role of the housing cap and sealing liner.
• the manually operated pump of the present invention may be applied to a pump having discharge rate, less than approximately 0.2 cc per one time, more preferably 0.05 to 0.2 cc per one time.
• the present invention may include the range having the definition of the pump for discharging some amount even though the discharge rate of the pump is somewhat deviated from said range.
• High viscous emulsion contents such as cosmetic lotion and low viscous liquid contents such as perfume are both available as the contents discharged.
• Bulk state and spray state of fine liquid drop are both available as an ejection manner of the contents.
• the difference of such ejection manners depends on whether the ejection nozzle is secured to the discharge opening to which the contents are ejected outwardly from the pump. In case that the ejection nozzle is secured to the said discharge opening, the liquid type content is ejected in the mist state.
• Fig. 2 to Fig. 6 shows the manually operated pump for discharging small amount and its constituent parts according to various examples of the invention.
• the structure of the pump according to the present invention and the operating principle will be described with reference to the figures as follows.
• the upper end of the shaft (30) having internal passage (38) therein is secured to the actuator (10) and the spring (50) is fitted to the conical pedestal (32) in the lower end of the shaft (30).
• the piston (40) having dual structure composed of interior surface (42) and exterior surface (44), slidably reciprocates along the interior surface of the housing (20).
• the portions of the shaft (30) along which the interior surface (42) of the piston is slidably reciprocated are portions between right step (34) and the upper end protrusion (33) of the conical pedestal (32).
• the diameter of those portions is shorter than that of other portions.
• the length of the interior surface (42) of the piston is relatively shorter than that of said portions.
• the sliding part (31) of the shaft is the portion abutted with the interior surface (42) of the piston when the downward force is applied to the actuator (10), so that it gives the friction force to the interior surface (42) of the piston in reciprocating motion.
• the friction force of the exterior surface (44) of the piston is greater than that of the interior surface (42) of the piston in reciprocating motion of the piston (40), since the area of the sliding part (31) in which the interior surface (42) of the piston abuts with the shaft, is smaller than the area in which the exterior surface (44) of the piston abuts with the interior surface of the housing.
• the shaft (30) begins to move upwardly, at this time, the interior surface (42) of the piston, of which the friction force is also relatively small, firstly slides than the exterior surface (44) of the piston. Therefore, the inner space (22) of the cylinder is blocked against the internal passage (38) of the shaft (30) by the upper end protrusion (33) of the conical pedestal (32) of the shaft (30) engaged with the lower end of the interior surface (42) of the piston. Then, during the continuous upward movement of shaft (30), the exterior surface (44) of the piston slidably moves and the pressure of the inner space (22) of the closed cylinder continues to decrease. In order to supplement such a decrease of the pressure, the ball (60) is slightly lifted up, which blocks the lower part of the housing by gravity, and the contents of the vessel is introduced through the tube (80) into the inner space (22) by way of such a gap.
• Fig. 3 shows the vertical cross sectional view of the cover according to further embodiment of the present invention, wherein the inner cylindrical bending part (72) comprises: the first circumferential part (76) downwardly extended from the horizontal part (74) of the cover (70); the second circumferential part (78) spaced apart from the first circumferential part (76) in the central axis direction; and the connection (77) which interconnects the lower end of the first circumferential part (76) and the lower end of the second circumferential part (78) and forms the circular groove (79) in the top.
• the inner cylindrical bending part (72) comprises: the first circumferential part (76) downwardly extended from the horizontal part (74) of the cover (70); the second circumferential part (78) spaced apart from the first circumferential part (76) in the central axis direction; and the connection (77) which interconnects the lower end of the first circumferential part (76) and the lower end of the second circumferential part (78) and forms the circular groove (79) in the top.
• connection (77) preferably have the structure to be stuck to the piston (40) and block the interior of the housing (20) against the exterior of the housing since the connection (77) is engaged with the piston (40) in state that the downward force is not applied to the actuator (10).
• the upper end of the housing (20) is secured above the space composed of the vertical part (73) and the first circumferential part (76) among the interior structures of the cover (70), and the securing force is improved by the bending force due to the bending structure of the inner cylindrical bending part (72). More particularly, the second circumferential part (78) presses the whole of the inner cylindrical bending part (72) by abutting with the shaft (30), in which such a pressure is shown as reacting force by especially circular groove (79) etc, this spring reacting force reinforces the securing force between the upper part of the housing (20) and interior structure of the cover (70).
• Fig. 4 to Fig. 6 shows the various examples of the pump having both two characteristics of the present invention.
• Fig. 4 shows an example of the pump (200) according to the present invention, wherein the whole structure is identical to the pump (300) of Fig. 2 only except for the cover (200) integrated with the inner cylindrical bending part (72).
• the inner cylindrical bending part (72) performs the role of the housing cap (25), instead of not having the housing cap (25).
• the assembly of the housing (20) and the cover (70) is completed by just fitting the cover (70) on top of the housing (20), so that the assembly process is very simple.
• Fig. 5 shows an example of the pump (300) according to the present invention, wherein the configuration is identical to that of Fig. 4 except for the discharge nozzle (16) secured to the discharge opening (12) of the actuator (10).
• Fig. 6 shows an example of the pump(400) according to the present invention, wherein the configuration is identical to that of Fig. 4 except for the ejection nozzle(14) secured in the discharge opening(12) of the actuator (10). Even though the whole structure of the pump (400) of Fig. 6 is identical to the pump (200, 300) of the Fig. 4 and Fig. 5, it is possible for the pump (400) to spray the low viscous liquid contents with small water drop state by mounting the ejection nozzle (14) in the discharge opening (12).
• Fig. 1 is a vertical cross-sectional view of the representative conventional manually operated pump for discharging small amount
• Fig. 2 is a vertical perspective view in cross-section of the manually operated pump (100) for discharging small amount according to an embodiment of the invention
• Fig. 3 is a vertical cross-sectional view of the vessel cover with which the inner cylindrical bending part is integrated, according to an embodiment of the invention
• Fig. 4 is a vertical cross-sectional view of the manually operated pump (200) for discharging small amount according to an embodiment of the invention
• Fig. 5 is a vertical cross-sectional view of the manually operated pump (300) for discharging small amount, with the discharge nozzle secured in the discharge opening in Fig. 4;
• Fig. 6 is a vertical cross-sectional view of the manually operated pump (400) for discharging small amount, with the ejection nozzle secured in the discharge opening.
• actuator 12 discharge opening
• piston 42 interior surface of the piston
• connection 78 second circumferential part
• the manually operated pump for discharging small amount of the invention is characterized in that the original function of the pump may be performed by means of just one spring by changing the structure of the shaft and the piston, the manufacturing process of the pump may be simplified by integrating the housing cap and vessel cover to reduce the number of parts, the assembly process of the parts is simple, and the pumping is easier. And, it is an advantageous to improve the securing force between the housing and the cover and the sealing of the interior of the housing.
• This manually operated pump for discharging small amount is available in pumping both of high viscous contents and low viscous contents.
• the vessel cover may be secured to use instead of the housing cover.

Applications Claiming Priority (1)

Publications (2)

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ID=19198290

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• 2000
  • 2000-10-19 EP EP00971843A patent/EP1334277A4/en not_active Withdrawn
  • 2000-10-19 WO PCT/KR2000/001178 patent/WO2002033258A1/en active Application Filing
  • 2000-10-19 JP JP2002536214A patent/JP2004511725A/ja active Pending
  • 2000-10-19 CN CN00819969.8A patent/CN1258647C/zh not_active Expired - Fee Related
  • 2000-10-19 AU AU2001210592A patent/AU2001210592A1/en not_active Abandoned

Patent Citations (5)

Non-Patent Citations (1)

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