US20130043283A1 - Efoam pump with spring isolated from flow path - Google Patents
Efoam pump with spring isolated from flow path Download PDFInfo
- Publication number
- US20130043283A1 US20130043283A1 US13/212,189 US201113212189A US2013043283A1 US 20130043283 A1 US20130043283 A1 US 20130043283A1 US 201113212189 A US201113212189 A US 201113212189A US 2013043283 A1 US2013043283 A1 US 2013043283A1
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- United States
- Prior art keywords
- tube
- pump
- piston
- casing
- pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
-
- 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
- B05B11/1042—Components or details
- B05B11/1043—Sealing or attachment arrangements between pump and container
- B05B11/1046—Sealing or attachment arrangements between pump and container the pump chamber being arranged substantially coaxially to the neck of the container
- B05B11/1047—Sealing or attachment arrangements between pump and container the pump chamber being arranged substantially coaxially to the neck of the container the pump being preassembled as an independent unit before being mounted on the container
-
- 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
- B05B11/1042—Components or details
- B05B11/1066—Pump inlet valves
- B05B11/1071—Two inlet valves being placed in a supply conduit one upstream of the other
-
- 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
- B05B11/1042—Components or details
- B05B11/1073—Springs
- B05B11/1074—Springs located outside pump chambers
-
- 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
- B05B11/1087—Combination of liquid and air pumps
Definitions
- the present invention relates to pumps, in particular to a foam pump with a spring isolated from a flow path.
- the foam pumps of the present invention are suitable for the packing bottles of cosmetics, drug sundries, medical things, everyday used articles, etc.
- Foam pumps are frequently used in the packing bottles of cosmetics, drug sundries, medical things, everyday used articles, etc. All the foaming pumps are installed with springs at inner sides thereof. The liquid or emulsions within the bottles passes through the springs and compressed by the pumps and then are sprayed out. However the springs will provide resist forces to the packing objects so that the liquid or emulsion can not flow out frequently. Moreover, the springs will pollute the packing objects so that the packing objects will react with the material of the springs so as to generate harmful objects to human bodies. Thus this prior way is not matched to the requirement of environmental protection, and is harmful to human bodies.
- the spring is isolated with the liquid and the emulsion.
- the object of the present invention is to provide a foam pump with a spring isolated from a flow path, wherein the spring is isolated with the foaming flow path so that it does not resist the flow of the foams; the packed object is not in contact with the foams so that the foams are not polluted and thus the packed objects (liquid or foams) therein is retained purely; the packed object is not chemically reacted with the material of the spring and thus no harmful object generates; the operation of the present invention is convenient and easy with a steady flow and reliable output.
- a foam pump with a spring isolated from a flow path comprising:
- a pressing head 100 at an upper side thereof, an inner tube extending downwards from the pressing tube, and an outer tube enclosing the inner tube; a lower part of the inner tube being higher than a lower opening of the outer tube; an inner side of the pressing tube being a hollow channel for outputting foams; the hollow channel of the pressing tube being communicated to the inner tube;
- a net tube ( 300 ) installed within the inner tube of the pressing head and communicated to the inner tube of the pressing tube; the net tube 300 having a net-like structure;
- a pump upper casing 350 extended from a lower side of the outer tube of the pressing head; the pump upper casing having a dome outer shape with an upper opening for passing the pressing head; a gap being formed between the outer tube of the pressing head and the opening of the pump upper casing so that outer air can pass through the gap to flow into an interior of the pump; an upper inner side of the pump upper casing being an inner upper cylinder and a lower inner part of the pump upper casing being a lower cylinder ( 352 ); a lower inner wall of the lower cylinder of the pump upper casing being formed with threads ( 9 ); the threads serving to screw to outer threads of a bottle; a space between the inner tube and outer tube of the pressing head being communicated to an inner space of the pump upper casing ( 350 ) at a position above threads; in operation, the pump upper casing being slidable along an inner space between the inner tube and outer tube of the pressing head;
- an upper piston ( 400 ) having a multi-stage structure and an upper stage thereof has a smaller diameter than a lower one; the upper piston being opened at an upper side and lower side thereof; the uppermost stage ( 401 ) of the upper piston being protruded into a space between the inner tube ( 102 ) of the pressing head and the net tube ( 300 ) so that the inner space of the upper piston ( 400 ) being communicated to the inner channel of the net tube ( 300 ) and the inner channel of the inner tube ( 102 ); a plurality of through holes ( 405 ) being formed in an annular transversal ring ( 404 ) of the upper piston ( 400 );
- an air valve ( 500 ) having a reduced size which is reduced from an upper side to a lower side thereof; the air valve having a hollow center which is opened at an upper side thereof; the air valve being communicated to the inner space of the net tube ( 300 ); a lowest part of the air valve ( 500 ) having a sealed bottom; by a large suction force, the liquid can flow through the periphery of the air valve in force to flow upwards to be sprayed out from a mouth ( 104 ) of the pressing head ( 100 );
- a lower piston ( 120 ) having a cylindrical structure with a hollow center; an upper hollow center of the lower piston receiving the air valve ( 500 ) so that an upper side of the air valve being tightly engaged to an inner wall of the lower piston ( 120 ); an outer middle part of the lower piston ( 120 ) being protruded with a flange ( 121 ); a plurality of slots ( 122 ) being formed in the flange; a lower side of the lower piston being biforked into an inner ring ( 123 ) and an outer ring ( 124 );
- an elastic sheet ( 600 ) being a round cylinder and being tightly engaged into a recess ( 402 ) in an inner wall of the upper piston ( 400 ); a lower side of the elastic sheet resisting against an upper wall of the flange ( 121 ) of the lower piston ( 120 ); a lower outer wall of the elastic sheet being extended with an elastic outer annular sheet ( 601 ) which shields the plurality of through holes ( 402 ) in an annular transversal ring ( 403 ) of the upper piston from a lower side of the annular transversal ring; a lower inner wall of the elastic sheet ( 600 ) being extended with an elastic inner annular sheet ( 602 ) which shields the plurality of slots ( 122 ) in the flange ( 121 ) from the upper side of the flange;
- a lower post ( 700 ) having a cylindrical structure with a hollow center and a sealed lower bottom; a lower side of the lower post being formed with a tapered head ( 701 ); a tip of the tapered head facing downwards; an upper side of the lower post being tightly engaged with the inner ring ( 123 ) of the lower piston ( 120 );
- a lower casing ( 130 ) being formed by an inner pipe ( 131 ) and an outer pipe ( 132 ); the inner pipe ( 131 ) and the outer pipe ( 132 ) being connected at a lower bottom of the outer pipe ( 132 ); the outer pipe ( 132 ) having a round cylindrical structure and being opened at an upper side thereof and having a seal bottom ( 135 ) enclosing the inner tube ( 131 ); an upper end of the lower casing ( 130 ) expanding transversally to be engaged into an annular slot ( 355 ) in an inner wall of the upper casing ( 350 ) above the thread ( 9 ); the inner pipe being a round cylinder and being opened at an upper side thereof; an outer ring ( 123 ) of the lower piston ( 120 ) being tightly engaged to an inner wall of the inner pipe ( 131 ) of the lower casing; a reduced pipe ( 133 ) being extended from a lower end of the lower pipe and having a reduced diameter smaller than that of the lower pipe; an upper side of the reduced
- a suction tube ( 15 ) having an upper end inserted into an inner space of the reduced pipe ( 133 ) to resist against an inner wall of the reduced pipe ( 133 ) of the lower casing ( 130 );
- FIG. 1 is an exploded perspective view of the foam pump of the present invention.
- FIG. 1-1 is a perspective view about the detailed structure of the elastic sheet of the present invention.
- FIG. 2 shows an assembled outlook of the present invention.
- FIG. 3 is a cross sectional schematic view of the foaming pump of the present invention, wherein the pump is in a static state.
- FIG. 4 is a cross sectional schematic view of the foaming pump of the present invention, wherein the pump is in a pressing state and the flow path is also indicated.
- FIG. 5 is a cross sectional schematic view of the foaming pump of the present invention, wherein the different cavities for filling liquid of the present invention is illustrated.
- a pressing head 100 has a pressing tube 101 at an upper side thereof, an inner tube 102 extending downwards from the pressing tube 101 , and an outer tube 103 enclosing the inner tube 102 .
- a lower part of the inner tube 102 is higher than a lower opening of the outer tube 103 .
- An inner side of the pressing tube 101 is a hollow channel for outputting foams. The hollow channel of the pressing tube 101 is communicated to the inner tube 102 thereof.
- a net tube 300 is installed within the inner tube 102 of the pressing head 100 and is communicated to the inner tube 102 of the pressing tube 1 .
- the net tube 300 has a net-like structure.
- a pump upper casing 350 is extended from a lower side of the outer tube 103 of the pressing head 100 .
- the pump upper casing 359 has a dome outer shape with an upper opening for passing the pressing head 100 .
- a gap is formed between the outer tube 103 of the pressing head and the opening of the pump upper casing 350 so that outer air can pass through the gap to flow into an interior of the pump.
- An upper inner side of the pump upper casing 350 is an inner upper cylinder 351 and a lower inner part of the pump upper casing 350 is a lower cylinder 352 .
- a lower inner wall of the lower cylinder 352 of the pump upper casing 350 is formed with threads 9 .
- the threads 9 serve to screw to outer threads of a bottle (not shown) with packed objects (such as liquid or emulsion).
- a space between the inner tube 102 and outer tube 103 of the pressing head 100 is communicated to an inner space of the pump upper casing 350 at a position above threads 9 .
- the pump upper casing is slidable along an inner space between the inner tube 102 and outer tube 103 of the pressing head 100 .
- An upper piston 400 has a multi-stage structure and an upper stage thereof has a smaller diameter than a lower one; the upper piston 400 is opened at an upper side and lower side thereof.
- the uppermost stage 401 of the upper piston 400 is protruded into a space between the inner tube 102 of the pressing head 100 and the net tube 300 so that the inner space of the upper piston 400 is communicated to the inner channel of the net tube 300 and the inner channel of the inner tube 102 .
- a plurality of through holes 405 are formed in an annular transversal ring 404 of the upper piston 400 .
- An air valve 500 has a reduced size which is reduced from an upper side to a lower side thereof.
- the air valve 500 has a hollow center which is opened at an upper side thereof.
- the air valve 500 is communicated to the inner space of the net tube 300 .
- a lowest part of the air valve 500 has a sealed bottom.
- a lower piston 120 has a cylindrical structure with a hollow center.
- An upper hollow center of the lower piston 120 receives the air valve 500 so that an upper side of the air valve 500 is tightly engaged to an inner wall of the lower piston 120 .
- An outer middle part of the lower piston 120 is protruded with a flange 121 .
- a plurality of slots 122 are formed in the flange 121 .
- a lower side of the lower piston 120 is biforked into an inner ring 123 and an outer ring 124 .
- An elastic sheet 600 is a round cylinder and is tightly engaged into a recess 402 in an inner wall of the upper piston 400 .
- a lower side of the elastic sheet 600 resists against an upper wall of the flange 121 of the lower piston 120 .
- a lower outer wall of the elastic sheet 600 is extended with an elastic outer annular sheet 601 which shields the plurality of through holes 402 in an annular transversal ring 403 of the upper piston 400 from a lower side of the annular transversal ring 403 .
- a lower inner wall of the elastic sheet 600 is extended with an elastic inner annular sheet 602 which shields the plurality of slots 122 in the flange 121 from the upper side of the flange 121 .
- a lower post 700 has a cylindrical structure with a hollow center and a sealed lower bottom.
- a lower side of the lower post 700 is formed with a tapered head 701 .
- a tip of the tapered head 701 faces downwards.
- An upper side of the lower post 700 is tightly engaged with the inner ring 123 of the lower piston 120 .
- a lower casing 130 is formed by an inner pipe 131 and an outer pipe 132 .
- the inner pipe 131 and the outer pipe 132 are connected at a lower bottom of the outer pipe 132 .
- the outer pipe 132 has a round cylindrical structure and is opened at an upper side thereof and has a seal bottom 135 enclosing the inner tube 131 .
- An upper end of the lower casing 130 expands transversally to be engaged into an annular slot 355 in an inner wall of the upper casing 350 above the thread 9 .
- the inner pipe 131 is a round cylinder and is opened at an upper side thereof.
- An outer ring 123 of the lower piston 120 is tightly engaged to an inner wall of the inner pipe 131 of the lower casing 130 .
- a reduced pipe 133 is extended from a lower end of the lower pipe 131 and has a reduced diameter smaller than that of the lower pipe 131 .
- An upper side of the reduced pipe 133 is protruded into an inner space of the lower pipe 131 and is extended as a shoulder portion 134 which resists against an upper surface of the tapered head 701 of the lower post 700 .
- an outer wall of the lowest stage 403 of the upper piston 400 movably resists against an inner wall of the outer pipe 131 of the lower casing 130 .
- a suction tube 15 has an upper end inserted into an inner space of the reduced pipe 133 to resist against an inner wall of the reduced pipe 133 of the lower casing 130 .
- a washer 8 encloses an uppermost outer wall of the outer pipe 131 of the lower casing 130 and resists against an inner wall of the lower cylinder 352 of the pump upper casing 350 .
- a spring 200 winds around the lower piston 120 at a portion below the flange 121 thereof and the inner tube 131 at a portion within the outer tube 132 of the outer casing 130 .
- the spring 200 is a compressible and resilient spring. A lower end of the spring 200 resists against the bottom 135 of the lower casing 130 .
- a further dustproof cover 800 serves to cover upon the pressing head 100 and the pump upper casing 350 so as to prevent dust to flow into the pump of the present invention.
- a path A shows the flow path of the liquid (or emulsion)
- a path B shows the flow path of the air
- a path G shows the flow of the foams which are mixtures of air and liquid (or emulsion).
- the amount of the liquid flows into the space F each time is very little and thus a few times are necessary for pumping liquid into the space F.
- a compressing action of the pressing head 100 cause the liquid in the space F to be compressed to be sucked upwards along the path B shown in FIG. 3 .
- the liquid (or emulsion) enters into the inner space of the net tube 300 to be mixed with the air. Since the pressure to mix air and liquid (or emulsion) is very strong and thus the air and liquid (or emulsion) are mixed sufficiently to form as foams which is sucked out from the spraying mouth 104 of the pressing head 100 along the flow line G as illustrated in FIG. 4 .
- the spring 200 is decompressed until the upper piston 400 resists against an inner wall at the upper inner side of the upper casing 350 .
- the air in the space C will flow through the plurality of through holes 405 in an annular transversal ring 404 of the upper piston 400 and then pull away the elastic outer annular sheet 601 of the elastic sheet 600 to enter into the space D.
- the shoulder portion 134 tightly resists against the upper surface of the tapered head 701 of the lower post 700 so as to isolate the liquid (or emulsion) flow between the bottle (not shown) and the inner pipe 131 of the flow casing 130 .
- the foams from the pump are slender and uniform without any liquid so as to have a preferred effect.
- the liquid (or emulation) flows through the inner channel of the inner tube and thus it does not contact with the spring so that the foams will not be polluted by the spring.
- the preferred effects of the present invention is that the spring is isolated with the foaming flow path so that it is not in the flow of the foams so that the foams are not polluted and thus the packed objects (liquid or foams) therein is retained purely; the liquid (or emulsion) is not chemically reacted with the material of the spring and thus no harmful object generates; the operation of the present invention is convenient and easy with a steady flow and reliable output.
- foam pumps of the present invention are suitable for the packing bottles of cosmetics, drug sundries, medical things, everyday used articles, etc.
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- Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
- Reciprocating Pumps (AREA)
- Closures For Containers (AREA)
Abstract
A foam pump has a spring isolated from a flow path. Due to the arrangement of inner tube and outer tube of the pressing head and a spring installed between the inner tube and the outer tube, in the suction process, the liquid (or emulation) in the bottle flows through the inner channel of the inner tube and thus it does not contact with the outer tube so that the foams will not be polluted by the material spring. The spring is isolated with the foaming flow path so that it does not resist the flow of the foams; the liquid (or emulsion) does not contact the foams so that the foams are not polluted and thus the liquid in a bottle is retained purely; the liquid is not chemically reacted with the material of the spring and thus no harmful object generates.
Description
- The present invention relates to pumps, in particular to a foam pump with a spring isolated from a flow path. The foam pumps of the present invention are suitable for the packing bottles of cosmetics, drug sundries, medical things, everyday used articles, etc.
- Foam pumps are frequently used in the packing bottles of cosmetics, drug sundries, medical things, everyday used articles, etc. All the foaming pumps are installed with springs at inner sides thereof. The liquid or emulsions within the bottles passes through the springs and compressed by the pumps and then are sprayed out. However the springs will provide resist forces to the packing objects so that the liquid or emulsion can not flow out frequently. Moreover, the springs will pollute the packing objects so that the packing objects will react with the material of the springs so as to generate harmful objects to human bodies. Thus this prior way is not matched to the requirement of environmental protection, and is harmful to human bodies.
- Thus there is an eager demand for a novel way to improve the above mentioned defects in the prior art. In this improvement structure, the spring is isolated with the liquid and the emulsion.
- The object of the present invention is to provide a foam pump with a spring isolated from a flow path, wherein the spring is isolated with the foaming flow path so that it does not resist the flow of the foams; the packed object is not in contact with the foams so that the foams are not polluted and thus the packed objects (liquid or foams) therein is retained purely; the packed object is not chemically reacted with the material of the spring and thus no harmful object generates; the operation of the present invention is convenient and easy with a steady flow and reliable output.
- To achieve above object, the present invention provides A foam pump with a spring isolated from a flow path, comprising:
- a pressing head (100) at an upper side thereof, an inner tube extending downwards from the pressing tube, and an outer tube enclosing the inner tube; a lower part of the inner tube being higher than a lower opening of the outer tube; an inner side of the pressing tube being a hollow channel for outputting foams; the hollow channel of the pressing tube being communicated to the inner tube;
- a net tube (300) installed within the inner tube of the pressing head and communicated to the inner tube of the pressing tube; the
net tube 300 having a net-like structure; - a pump upper casing (350) extended from a lower side of the outer tube of the pressing head; the pump upper casing having a dome outer shape with an upper opening for passing the pressing head; a gap being formed between the outer tube of the pressing head and the opening of the pump upper casing so that outer air can pass through the gap to flow into an interior of the pump; an upper inner side of the pump upper casing being an inner upper cylinder and a lower inner part of the pump upper casing being a lower cylinder (352); a lower inner wall of the lower cylinder of the pump upper casing being formed with threads (9); the threads serving to screw to outer threads of a bottle; a space between the inner tube and outer tube of the pressing head being communicated to an inner space of the pump upper casing (350) at a position above threads; in operation, the pump upper casing being slidable along an inner space between the inner tube and outer tube of the pressing head;
- an upper piston (400) having a multi-stage structure and an upper stage thereof has a smaller diameter than a lower one; the upper piston being opened at an upper side and lower side thereof; the uppermost stage (401) of the upper piston being protruded into a space between the inner tube (102) of the pressing head and the net tube (300) so that the inner space of the upper piston (400) being communicated to the inner channel of the net tube (300) and the inner channel of the inner tube (102); a plurality of through holes (405) being formed in an annular transversal ring (404) of the upper piston (400);
- an air valve (500) having a reduced size which is reduced from an upper side to a lower side thereof; the air valve having a hollow center which is opened at an upper side thereof; the air valve being communicated to the inner space of the net tube (300); a lowest part of the air valve (500) having a sealed bottom; by a large suction force, the liquid can flow through the periphery of the air valve in force to flow upwards to be sprayed out from a mouth (104) of the pressing head (100);
- a lower piston (120) having a cylindrical structure with a hollow center; an upper hollow center of the lower piston receiving the air valve (500) so that an upper side of the air valve being tightly engaged to an inner wall of the lower piston (120); an outer middle part of the lower piston (120) being protruded with a flange (121); a plurality of slots (122) being formed in the flange; a lower side of the lower piston being biforked into an inner ring (123) and an outer ring (124);
- an elastic sheet (600) being a round cylinder and being tightly engaged into a recess (402) in an inner wall of the upper piston (400); a lower side of the elastic sheet resisting against an upper wall of the flange (121) of the lower piston (120); a lower outer wall of the elastic sheet being extended with an elastic outer annular sheet (601) which shields the plurality of through holes (402) in an annular transversal ring (403) of the upper piston from a lower side of the annular transversal ring; a lower inner wall of the elastic sheet (600) being extended with an elastic inner annular sheet (602) which shields the plurality of slots (122) in the flange (121) from the upper side of the flange;
- a lower post (700) having a cylindrical structure with a hollow center and a sealed lower bottom; a lower side of the lower post being formed with a tapered head (701); a tip of the tapered head facing downwards; an upper side of the lower post being tightly engaged with the inner ring (123) of the lower piston (120);
- a lower casing (130) being formed by an inner pipe (131) and an outer pipe (132); the inner pipe (131) and the outer pipe (132) being connected at a lower bottom of the outer pipe (132); the outer pipe (132) having a round cylindrical structure and being opened at an upper side thereof and having a seal bottom (135) enclosing the inner tube (131); an upper end of the lower casing (130) expanding transversally to be engaged into an annular slot (355) in an inner wall of the upper casing (350) above the thread (9); the inner pipe being a round cylinder and being opened at an upper side thereof; an outer ring (123) of the lower piston (120) being tightly engaged to an inner wall of the inner pipe (131) of the lower casing; a reduced pipe (133) being extended from a lower end of the lower pipe and having a reduced diameter smaller than that of the lower pipe; an upper side of the reduced pipe (133) being protruded into an inner space of the lower pipe (131) and being extended as a shoulder portion (134) which resists against an upper surface of the tapered head (701) of the lower post (700); an outer wall of the lowest stage (403) of the upper piston (400) movably resisting against an inner wall of the outer pipe of the lower casing; and
- a suction tube (15) having an upper end inserted into an inner space of the reduced pipe (133) to resist against an inner wall of the reduced pipe (133) of the lower casing (130); and
- a spring (200) winding around the lower piston at a portion below the flange (121) thereof and the inner tube (131) at a portion within the outer tube (132) of the outer casing (130); the spring being a compressible and resilient spring; and a lower end of the spring resisting against the bottom (135) of the lower casing.
- The various objects and advantages of the present invention will be more readily understood from the following detailed description when read in conjunction with the appended drawing.
-
FIG. 1 is an exploded perspective view of the foam pump of the present invention. -
FIG. 1-1 is a perspective view about the detailed structure of the elastic sheet of the present invention. -
FIG. 2 shows an assembled outlook of the present invention. -
FIG. 3 is a cross sectional schematic view of the foaming pump of the present invention, wherein the pump is in a static state. -
FIG. 4 is a cross sectional schematic view of the foaming pump of the present invention, wherein the pump is in a pressing state and the flow path is also indicated. -
FIG. 5 is a cross sectional schematic view of the foaming pump of the present invention, wherein the different cavities for filling liquid of the present invention is illustrated. - In order that those skilled in the art can further understand the present invention, a description will be provided in the following in details. However, these descriptions and the appended drawings are only used to cause those skilled in the art to understand the objects, features, and characteristics of the present invention, but not to be used to confine the scope and spirit of the present invention defined in the appended claims. In the following, the foam pump of the present invention is illustrated with reference to
FIGS. 1 , 2 and 3. - A
pressing head 100 has apressing tube 101 at an upper side thereof, aninner tube 102 extending downwards from thepressing tube 101, and anouter tube 103 enclosing theinner tube 102. A lower part of theinner tube 102 is higher than a lower opening of theouter tube 103. An inner side of thepressing tube 101 is a hollow channel for outputting foams. The hollow channel of thepressing tube 101 is communicated to theinner tube 102 thereof. - A
net tube 300 is installed within theinner tube 102 of thepressing head 100 and is communicated to theinner tube 102 of the pressing tube 1. Thenet tube 300 has a net-like structure. - A pump
upper casing 350 is extended from a lower side of theouter tube 103 of thepressing head 100. The pump upper casing 359 has a dome outer shape with an upper opening for passing thepressing head 100. A gap is formed between theouter tube 103 of the pressing head and the opening of the pumpupper casing 350 so that outer air can pass through the gap to flow into an interior of the pump. An upper inner side of the pumpupper casing 350 is an innerupper cylinder 351 and a lower inner part of the pumpupper casing 350 is alower cylinder 352. A lower inner wall of thelower cylinder 352 of the pumpupper casing 350 is formed withthreads 9. Thethreads 9 serve to screw to outer threads of a bottle (not shown) with packed objects (such as liquid or emulsion). A space between theinner tube 102 andouter tube 103 of thepressing head 100 is communicated to an inner space of the pumpupper casing 350 at a position abovethreads 9. In operation, the pump upper casing is slidable along an inner space between theinner tube 102 andouter tube 103 of thepressing head 100. - An
upper piston 400 has a multi-stage structure and an upper stage thereof has a smaller diameter than a lower one; theupper piston 400 is opened at an upper side and lower side thereof. Theuppermost stage 401 of theupper piston 400 is protruded into a space between theinner tube 102 of thepressing head 100 and thenet tube 300 so that the inner space of theupper piston 400 is communicated to the inner channel of thenet tube 300 and the inner channel of theinner tube 102. A plurality of throughholes 405 are formed in an annulartransversal ring 404 of theupper piston 400. - An
air valve 500 has a reduced size which is reduced from an upper side to a lower side thereof. Theair valve 500 has a hollow center which is opened at an upper side thereof. Theair valve 500 is communicated to the inner space of thenet tube 300. A lowest part of theair valve 500 has a sealed bottom. By a large suction force, the liquid can flow through the periphery of the air valve in force to flow upwards to be sprayed out from a mouth 104 of thepressing head 100. - A
lower piston 120 has a cylindrical structure with a hollow center. An upper hollow center of thelower piston 120 receives theair valve 500 so that an upper side of theair valve 500 is tightly engaged to an inner wall of thelower piston 120. An outer middle part of thelower piston 120 is protruded with aflange 121. A plurality ofslots 122 are formed in theflange 121. A lower side of thelower piston 120 is biforked into aninner ring 123 and anouter ring 124. - An
elastic sheet 600 is a round cylinder and is tightly engaged into arecess 402 in an inner wall of theupper piston 400. A lower side of theelastic sheet 600 resists against an upper wall of theflange 121 of thelower piston 120. Referring toFIG. 1-1 , a lower outer wall of theelastic sheet 600 is extended with an elastic outerannular sheet 601 which shields the plurality of throughholes 402 in an annulartransversal ring 403 of theupper piston 400 from a lower side of the annulartransversal ring 403. A lower inner wall of theelastic sheet 600 is extended with an elastic innerannular sheet 602 which shields the plurality ofslots 122 in theflange 121 from the upper side of theflange 121. - A
lower post 700 has a cylindrical structure with a hollow center and a sealed lower bottom. A lower side of thelower post 700 is formed with atapered head 701. A tip of the taperedhead 701 faces downwards. An upper side of thelower post 700 is tightly engaged with theinner ring 123 of thelower piston 120. - A
lower casing 130 is formed by aninner pipe 131 and anouter pipe 132. Theinner pipe 131 and theouter pipe 132 are connected at a lower bottom of theouter pipe 132. Theouter pipe 132 has a round cylindrical structure and is opened at an upper side thereof and has aseal bottom 135 enclosing theinner tube 131. An upper end of thelower casing 130 expands transversally to be engaged into anannular slot 355 in an inner wall of theupper casing 350 above thethread 9. Theinner pipe 131 is a round cylinder and is opened at an upper side thereof. Anouter ring 123 of thelower piston 120 is tightly engaged to an inner wall of theinner pipe 131 of thelower casing 130. A reducedpipe 133 is extended from a lower end of thelower pipe 131 and has a reduced diameter smaller than that of thelower pipe 131. An upper side of the reducedpipe 133 is protruded into an inner space of thelower pipe 131 and is extended as ashoulder portion 134 which resists against an upper surface of the taperedhead 701 of thelower post 700. As illustrated inFIG. 1 , an outer wall of thelowest stage 403 of theupper piston 400 movably resists against an inner wall of theouter pipe 131 of thelower casing 130. - A
suction tube 15 has an upper end inserted into an inner space of the reducedpipe 133 to resist against an inner wall of the reducedpipe 133 of thelower casing 130. - A
washer 8 encloses an uppermost outer wall of theouter pipe 131 of thelower casing 130 and resists against an inner wall of thelower cylinder 352 of the pumpupper casing 350. - A spring 200 winds around the
lower piston 120 at a portion below theflange 121 thereof and theinner tube 131 at a portion within theouter tube 132 of theouter casing 130. The spring 200 is a compressible and resilient spring. A lower end of the spring 200 resists against thebottom 135 of thelower casing 130. - Referring to
FIG. 1 , in the present invention, a furtherdustproof cover 800 serves to cover upon thepressing head 100 and the pumpupper casing 350 so as to prevent dust to flow into the pump of the present invention. - The operation of the present invention will be described herein with reference to
FIGS. 3 and 4 . InFIG. 4 , a path A shows the flow path of the liquid (or emulsion), a path B shows the flow path of the air and a path G shows the flow of the foams which are mixtures of air and liquid (or emulsion). - When the
pressing head 100 is pressed as illustrated inFIGS. 3 and 4 , thelowest stage 403 of theupper piston 400 will move downwards along the inner wall of theouter pipe 132 of the lower casing; and the spring 200 will be compressed until the a lower side of the annulartransversal ring 403 of theupper piston 400 resists against thebottom 135 of theouter casing 130. At this moment, emulsion original in the space I (seeFIG. 3 ) will flow into the space F (seeFIG. 5 ); and air will enter into the space C (seeFIG. 5 ) from the outer side of the foam pump of the present invention and the air originally in the space D (seeFIG. 5 ) will be compressed so as to pass through theslits 122 on theflange 121 of thelower piston 120 and then to eject the innerannular sheet 602 to move upwards and thus the liquid (or emulsion) passes through theslits 122 into the a space between theupper piston 400 and thelower piston 120 and then further enters into the inner space of thenet tube 300. The liquid (or the emulsion) in the bottle (not shown) originally filled in the space F (seeFIG. 5 ) will flow through the space between thelower post 700 and theinner ring 124 of thelower piston 120 and then enter into the interior of thenet tube 300 along the path B indicated inFIG. 5 as thetapered head 701 of thelower post 700 moves downwards. However the amount of the liquid flows into the space F each time is very little and thus a few times are necessary for pumping liquid into the space F. When the liquid in space F is sufficient, a compressing action of thepressing head 100 cause the liquid in the space F to be compressed to be sucked upwards along the path B shown inFIG. 3 . Then the liquid (or emulsion) enters into the inner space of thenet tube 300 to be mixed with the air. Since the pressure to mix air and liquid (or emulsion) is very strong and thus the air and liquid (or emulsion) are mixed sufficiently to form as foams which is sucked out from the spraying mouth 104 of thepressing head 100 along the flow line G as illustrated inFIG. 4 . - Furthermore, when the
pressing head 100 moves upwards, the spring 200 is decompressed until theupper piston 400 resists against an inner wall at the upper inner side of theupper casing 350. The air in the space C will flow through the plurality of throughholes 405 in an annulartransversal ring 404 of theupper piston 400 and then pull away the elastic outerannular sheet 601 of theelastic sheet 600 to enter into the space D. Theshoulder portion 134 tightly resists against the upper surface of the taperedhead 701 of thelower post 700 so as to isolate the liquid (or emulsion) flow between the bottle (not shown) and theinner pipe 131 of theflow casing 130. - The foams from the pump are slender and uniform without any liquid so as to have a preferred effect. In above mentioned process with reference to
FIGS. 2 and 3 , due to the inner tube and outer tube of thepressing head 100 and the spring 200 winds around thelower piston 120 at a portion below theflange 121 thereof and theinner tube 131 at a portion within theouter tube 132 of theouter casing 130, thus, in the suction process, the liquid (or emulation) flows through the inner channel of the inner tube and thus it does not contact with the spring so that the foams will not be polluted by the spring. - The preferred effects of the present invention is that the spring is isolated with the foaming flow path so that it is not in the flow of the foams so that the foams are not polluted and thus the packed objects (liquid or foams) therein is retained purely; the liquid (or emulsion) is not chemically reacted with the material of the spring and thus no harmful object generates; the operation of the present invention is convenient and easy with a steady flow and reliable output.
- It should be noted that the foam pumps of the present invention are suitable for the packing bottles of cosmetics, drug sundries, medical things, everyday used articles, etc.
- The present invention is thus described, it will be obvious that the same may be varied in many ways. Such variations are not to be regarded as a departure from the spirit and scope of the present invention, and all such modifications as would be obvious to one skilled in the art are intended to be included within the scope of the following claims.
Claims (6)
1. A foam pump with a spring isolated from a flow path, comprising:
a pressing head (100) at an upper side thereof, an inner tube extending downwards from the pressing tube, and an outer tube enclosing the inner tube; a lower part of the inner tube being higher than a lower opening of the outer tube; an inner side of the pressing tube being a hollow channel for outputting foams; the hollow channel of the pressing tube being communicated to the inner tube;
a net tube (300) installed within the inner tube of the pressing head and communicated to the inner tube of the pressing tube; the net tube 300 having a net-like structure;
a pump upper casing (350) extended from a lower side of the outer tube of the pressing head; the pump upper casing having a dome outer shape with an upper opening for passing the pressing head; a gap being formed between the outer tube of the pressing head and the opening of the pump upper casing so that outer air can pass through the gap to flow into an interior of the pump; an upper inner side of the pump upper casing being an inner upper cylinder and a lower inner part of the pump upper casing being a lower cylinder (352); a lower inner wall of the lower cylinder of the pump upper casing being formed with threads (9); the threads serving to screw to outer threads of a bottle; a space between the inner tube and outer tube of the pressing head being communicated to an inner space of the pump upper casing (350) at a position above threads; in operation, the pump upper casing being slidable along an inner space between the inner tube and outer tube of the pressing head;
an upper piston (400) having a multi-stage structure and an upper stage thereof has a smaller diameter than a lower one; the upper piston being opened at an upper side and lower side thereof; the uppermost stage (401) of the upper piston being protruded into a space between the inner tube (102) of the pressing head and the net tube (300) so that the inner space of the upper piston (400) being communicated to the inner channel of the net tube (300) and the inner channel of the inner tube (102); a plurality of through holes (405) being formed in an annular transversal ring (404) of the upper piston (400);
an air valve (500) having a reduced size which is reduced from an upper side to a lower side thereof; the air valve having a hollow center which is opened at an upper side thereof; the air valve being communicated to the inner space of the net tube (300); a lowest part of the air valve (500) having a sealed bottom; by a large suction force, the liquid can flow through the periphery of the air valve in force to flow upwards to be sprayed out from a mouth (104) of the pressing head (100);
a lower piston (120) having a cylindrical structure with a hollow center; an upper hollow center of the lower piston receiving the air valve (500) so that an upper side of the air valve being tightly engaged to an inner wall of the lower piston (120); an outer middle part of the lower piston (120) being protruded with a flange (121); a plurality of slots (122) being formed in the flange; a lower side of the lower piston being biforked into an inner ring (123) and an outer ring (124);
an elastic sheet (600) being a round cylinder and being tightly engaged into a recess (402) in an inner wall of the upper piston (400); a lower side of the elastic sheet resisting against an upper wall of the flange (121) of the lower piston (120); a lower outer wall of the elastic sheet being extended with an elastic outer annular sheet (601) which shields the plurality of through holes (402) in an annular transversal ring (403) of the upper piston from a lower side of the annular transversal ring; a lower inner wall of the elastic sheet (600) being extended with an elastic inner annular sheet (602) which shields the plurality of slots (122) in the flange (121) from the upper side of the flange;
a lower post (700) having a cylindrical structure with a hollow center and a sealed lower bottom; a lower side of the lower post being formed with a tapered head (701); a tip of the tapered head facing downwards; an upper side of the lower post being tightly engaged with the inner ring (123) of the lower piston (120);
a lower casing (130) being formed by an inner pipe (131) and an outer pipe (132); the inner pipe (131) and the outer pipe (132) being connected at a lower bottom of the outer pipe (132); the outer pipe (132) having a round cylindrical structure and being opened at an upper side thereof and having a seal bottom (135) enclosing the inner tube (131); an upper end of the lower casing (130) expanding transversally to be engaged into an annular slot (355) in an inner wall of the upper casing (350) above the thread (9); the inner pipe being a round cylinder and being opened at an upper side thereof; an outer ring (123) of the lower piston (120) being tightly engaged to an inner wall of the inner pipe (131) of the lower casing; a reduced pipe (133) being extended from a lower end of the lower pipe and having a reduced diameter smaller than that of the lower pipe; an upper side of the reduced pipe (133) being protruded into an inner space of the lower pipe (131) and being extended as a shoulder portion (134) which resists against an upper surface of the tapered head (701) of the lower post (700); an outer wall of the lowest stage (403) of the upper piston (400) movably resisting against an inner wall of the outer pipe of the lower casing; and
a suction tube (15) having an upper end inserted into an inner space of the reduced pipe (133) to resist against an inner wall of the reduced pipe (133) of the lower casing (130); and
a spring (200) winding around the lower piston at a portion below the flange (121) thereof and the inner tube (131) at a portion within the outer tube (132) of the outer casing (130); the spring being a compressible and resilient spring; and a lower end of the spring resisting against the bottom (135) of the lower casing.
2. The foam pump with a spring isolated from a flow path as claimed in claim 1 , wherein a washer encloses an uppermost outer wall of the outer pipe of the lower casing and resists against an inner wall of the lower cylinder of the pump upper casing.
3. The foam pump with a spring isolated from a flow path as claimed in claim 1 , wherein the upper piston is formed as a several stage structures; each stage of the elastic sheet is a round cylinder and is connected to other stage by a transversal sheets; each lower stage of the elastic sheet has a diameter larger than that of the upper stage.
4. The foam pump with a spring isolated from a flow path as claimed in claim 1 , wherein the foam pump is suitable for the packing bottles of cosmetics, drug sundries, medical things, and everyday used articles.
5. The foam pump with a spring isolated from a flow path as claimed in claim 1 , wherein the pressing head has a round pressing tube.
6. The foam pump with a spring isolated from a flow path as claimed in claim 1 , further comprising dustproof cover (800) serves to cover upon the pressing head 100 and the pump upper casing (350) so as to prevent dust to flow into the pump of the present invention.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/212,189 US20130043283A1 (en) | 2011-08-18 | 2011-08-18 | Efoam pump with spring isolated from flow path |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/212,189 US20130043283A1 (en) | 2011-08-18 | 2011-08-18 | Efoam pump with spring isolated from flow path |
Publications (1)
Publication Number | Publication Date |
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US20130043283A1 true US20130043283A1 (en) | 2013-02-21 |
Family
ID=47711919
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US13/212,189 Abandoned US20130043283A1 (en) | 2011-08-18 | 2011-08-18 | Efoam pump with spring isolated from flow path |
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Country | Link |
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US (1) | US20130043283A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2016055880A (en) * | 2014-09-08 | 2016-04-21 | 大和製罐株式会社 | Pump dispenser |
JP2021504254A (en) * | 2017-11-28 | 2021-02-15 | ヨンウー カンパニー,リミテッド | Powder discharge container |
WO2021073040A1 (en) * | 2019-10-15 | 2021-04-22 | 中山市美捷时包装制品有限公司 | Miniature perfume pump structure with external spring |
-
2011
- 2011-08-18 US US13/212,189 patent/US20130043283A1/en not_active Abandoned
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2016055880A (en) * | 2014-09-08 | 2016-04-21 | 大和製罐株式会社 | Pump dispenser |
JP2021504254A (en) * | 2017-11-28 | 2021-02-15 | ヨンウー カンパニー,リミテッド | Powder discharge container |
WO2021073040A1 (en) * | 2019-10-15 | 2021-04-22 | 中山市美捷时包装制品有限公司 | Miniature perfume pump structure with external spring |
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Legal Events
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Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |