US2956509A - Fluid dispensing pumps - Google Patents

Fluid dispensing pumps Download PDF

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Publication number
US2956509A
US2956509A US760042A US76004258A US2956509A US 2956509 A US2956509 A US 2956509A US 760042 A US760042 A US 760042A US 76004258 A US76004258 A US 76004258A US 2956509 A US2956509 A US 2956509A
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United States
Prior art keywords
plunger
cap
barrel
collar
pump
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.)
Expired - Lifetime
Application number
US760042A
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English (en)
Inventor
Rex C Cooprider
Douglas F Corsette
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Drackett Co
Original Assignee
Drackett Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to NL243140D priority Critical patent/NL243140A/xx
Priority to NL106608D priority patent/NL106608C/xx
Application filed by Drackett Co filed Critical Drackett Co
Priority to US760042A priority patent/US2956509A/en
Priority to GB29468/59A priority patent/GB906875A/en
Priority to DED31447A priority patent/DE1266647B/de
Priority to ES0251955A priority patent/ES251955A1/es
Priority to FR804627A priority patent/FR1236720A/fr
Priority to BE582489A priority patent/BE582489A/fr
Priority to CH362033D priority patent/CH362033A/fr
Application granted granted Critical
Publication of US2956509A publication Critical patent/US2956509A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • B05B11/1059—Means for locking a pump or its actuation means in a fixed position
    • B05B11/106—Means for locking a pump or its actuation means in a fixed position in a retracted position, e.g. in an end-of-dispensing-stroke position
    • 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
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/10—Valves; Arrangement of valves
    • F04B53/12—Valves; Arrangement of valves arranged in or on pistons
    • F04B53/121—Valves; Arrangement of valves arranged in or on pistons the valve being an annular ring surrounding the piston, e.g. an O-ring
    • 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

Definitions

  • This invention relates to new and improved fluid dispensing pumps of the class in which the pump plunger is immobilized in a predetermined position for packing and shipping purposes to avoid inadvertent actuation and discharge of the liquid contents of a container to which such a pump may be applied.
  • the liquid may escape either through the usual liquid discharge passage of the plunger and the plunger head or between the plunger and the barrel in which it works.
  • a primary object of the present invention to provide an improved form of fluid dispensing pump having means for retaining the plunger in immobilized position and including additional means rendered operative by immobilization of the plunger for closing oif the plunger discharge passage and at the same time providing a fluid seal or block preventing egress of the liquid between the pump plunger and its associated barrel.
  • the preferred means for retaining the plunger thus immobilized is a protective hold-down cap which is threaded or otherwise secured to the container over the plunger head to depress the plunger to its immobilized position against spring pressure.
  • the invention further contemplates that the discharge opening or orifice of the plunger head will be surrounded by a frusto-conical sealing surface for cooperation with a similar frusto-conical interior surface of the protective cap whereby to prevent discharge of fluid from the plunger head into the cap incident to application of the cap and depression of the plunger to its immobilized position, as will as subsequent thereto.
  • a still further object of the invention is to provide the cap and the threaded collar or other portion on which it is received with cooperating sealing means.
  • sealing means may comprise an upwardly axially opening annular groove in the threaded collar and an integral sealing ring guided by the cap for jamming reception in said groove.
  • the cap may be formed of a somewhat flexible 2,956,509 Patented Oct. 18, 1960 resilient plastic, such as polyethylene, to attain an improved sealing function by its said sealing ring and such ring will further function to resist radial stretching of the cap skirt with consequent slippage of the threads during application of the cap by automatic machinery.
  • this well-recognized difficulty inherent in threaded resilient caps is overcome by the present invention.
  • Figure 1 represents an axial sectional view through a liquid dispensing pump of the invention and the threaded container cap to which it is applied, the intake or suction tube of the pump being shown but fragmentarily.
  • the pump is shown with the plunger in its immobilized position and with the protective cap applied;
  • Figure 2 is a view of the pump structure shown in Figure 1, but with the protective cap removed and the pump plunger raised to operative position;
  • FIGS 3 and 4 respectively are fragmentary sectional views taken in the same plane as Figures 1 and 2 and showing modified forms of plunger seals;
  • Figure 5 is a view similar to Figure 1, showing a slightly modified form of pump structure
  • Figure 6 is a detail elevational view of the upper end portion of the pump plunger and plunger head as seen from the right in Figure 2;
  • Figure 7 is a section on the line 77 of Figure 5.
  • Figure 8 is a section on the line 8-8 of Figure 5.
  • FIG. 1 illustrates a liquid dispensing pump, which in this instance is mounted in a usual threaded metal container cap for application to a bottle, can or other container to dispense the liquid contents thereof in a known manner.
  • the pump comprises a stationary pump barrel 10, which may conveniently be molded or cast from a substantially rigid material such as vinyl plastic.
  • the pump barrel 10 is of hollow tubular construction so that its interior defines a pump cylinder 11 and it will be seen that the barrel at its upper end is centered in and opens through a circular central opening 13 within the container cap 12. The particular manner in which the barrel is so mounte will be more fully described hereinafter.
  • a suction tube 14 which may be of plastic or other usual material. It will be understood that the lower end of such tube, which is broken away in the present drawings, will depend into the liquid within the container to a point closely adjacent to the bottom of the container whereby the liquid contents may be withdrawn and dispensed through the pump structure of the invention.
  • the upper end of the tube 14 is received and frictionally or otherwise retained in a depending sleeve portion 16 integral with the pump barrel.
  • a foot valve cage or housing 1 8 formed with an inclined annular valve seat 20 for cooperation with a foot valve element exemplified by the ball valve 22.
  • the inwardly projecting valve seat portion 20 has a lower surface abutting against and thereby serving to position the upper end of the suction tube 14.
  • the ball valve 22 may, if desired, be guided in its seating and unseating movement by a plurality of guide ribs 24 and its unseating movement is preferably limited by overlying inwardly projecting retainers ordetents 26. These retainers have their inner ends disposed about a circle of very slightly smaller diameter than that of the ball valve 22. How
  • the plastic vinyl or other material from which the pump barrel is formed has sufiicient inherent resiliency so that it may be expanded sufiiciently to permit forcing the ball 22 downwardly past these retainers into the valve cage 18, during assembly of these parts.
  • a generally tubular plunger 28 Disposed for reciprocation within the pump barrel is a generally tubular plunger 28, which also may be formed of vinyl or other plastic material. It will be noted that the upper end of this plunger projects upwardly through the open upper end of the barrel 11 and above the container cap 12, where it carries a cap-like plunger discharge head 29.
  • the plunger At its lower end the plunger carries a piston consisting essentially of an inverted cup having downwardly and outwardly flaring skirt 30 in snug sliding engagement with the inner cylinder wall 11 of the pump barrel.
  • the piston 30 includes an upper sleeve extension 32 which is press-fitted into the lower end of the plunger or otherwise retained therein.
  • the several parts of the piston are integrally constructed of resilient material such as polyethylene plastic, whereby the lower edges of the piston skirt 30 may tend to resiliently expand into fluid-tight engagement with the inner wall 11 of the barrel and thereby function more efficiently.
  • the piston 32 carries a downward extension or probe 34, which, in this embodiment, is of downwardly opening tubular construction, the arrangement being such that a passage 36 extends completely through the piston from the lower end of the probe upwardly into communication with the tubular interior of the plunger 28 to provide a discharge passage portion connecting with the tube 14 through the intermediary of the foot valve 18.
  • a downward extension or probe 34 which, in this embodiment, is of downwardly opening tubular construction, the arrangement being such that a passage 36 extends completely through the piston from the lower end of the probe upwardly into communication with the tubular interior of the plunger 28 to provide a discharge passage portion connecting with the tube 14 through the intermediary of the foot valve 18.
  • a coil spring 38 disposed concentrically about the probe 34 under compression between the piston and the lower end of the cylinder within the pump barrel.
  • An upwardly presented annular shoulder 39 on the plunger is disposed for abutting engagement with the wiper ring 73, more fully described hereinafter, to limit the upward stroke of the plunger.
  • a breather passage or passages 40 through the side of the barrel just below the horizontal web of the container cap 12 and its associated sealing structure.
  • Such port or ports 40 establish communication between the interior of the container and the interior of the pump barrel above the piston to permit return flow of the fluid, and also permit air from the container to flow into and from the barrel above piston 30, thus preventing an air lock such as might interfere with the plunger reciprocation.
  • the plunger 28 Adjacent its upper end, the plunger 28 is provided with an additional valve seat 41 on which is seated a ball check valve 42 arranged to permit upward flow of fluid from the plunger head.
  • the plunger discharge head 29 is shown as being in form of an inverted cup-like member having its depending skirt receiving and enclosing the open upper end of the plunger tube 28.
  • the closed upper end 46 of the plunger discharge head is formed as a finger piece of suitable shape to permit actuation of the pump by repeatedly depressing it against the resilient force of its spring 38 and subsequently removing the finger pressure to permit the spring to return the plunger to its raised position.
  • the plunger head Internally the plunger head is formed with a depending stop 52 to limit unseating movement of ball 42.
  • the lower end of the plunger head 29 terminates externally of the plunger tube 28 in an annular stealing ring or skirt 48, the lower outer periphery or lip of which constitutes a sealing surface which is adapted for engagement and cooperation with an annular sealing surface 76 concentrically surrounding and spaced from the upper end of the pump barrel for preventing escape of fluid upwardly between the pump barrel and plunger, such as might otherwise occur, for instance, in the event the pump and its container are inverted or partially inverted, and the fluid contents of the container thus permitted to flow through the breather ports 40 into the space between the plunger and pump barrel.
  • the sealing surface or periphery 49a of the plunger skirt may be formed parallel to the conical sealing surface 76, as in the modification of Figure 3, for flush wedging engagement between said surfaces.
  • the peripheral sealing surface 49b may be formed as a knife edge for yielding line engagement with the surface 76.
  • the ball valve 42 will remain seated to apply suction, drawing liquid upwardly through the tube 14, the ball valve 22 being thereby unscated to permit passage of such liquid into the plunger tube 28. Then, as the plunger and plunger head are depressed, the wall valve 22 will reseat to prevent return flow of the liquid and the ball valve 42 will be opened to permit upward flow of the liquid into the plunger head 29 and thence outwardly through the discharge port or opening 54 in the side wall of the plunger head. While the discharge port 54 may communicate directly with the atmosphere, in the present embodiment it is shown as delivering the fluid into a spray nozzle structure for ejection in the form of a spray.
  • annular recess 56 around the outer end of this discharge opening or port, said recess being defined by an annular radiallyprojecting wall 57, having its radially projected periphery 57' disposed on the surface of an imaginary cone to provide a sealing surface for cooperation with the conical interior of the protective cap as hereinafter described.
  • a spray disc 58 Pressed into and frictionally retained or cemented within the annular recess 56 is a spray disc 58 having a spray discharge orifice 62, which receives fluid from the discharge passage 54 through usual tangential whirl passages 59 and an annular distributing passage 60.
  • connection is defined in the preferred embodiment by an annular plastic member 64 cemented or otherwise secured around the upper end of the pump barrel for disposition beneath the horizontal web of the container cap and for clamping between said cap and the upper end or lip of the container neck on which the cap is to be applied.
  • a suitable gasket 66 may be applied over the under-face of the member 64- for sealing engagement with the bottleneck or lip.
  • annular wall 68 Formed integrally with the member 64 is an upstanding annular wall 68 which projects upwardly through the central cap opening 13 for connection to the annular collar or adapter member 70, being preferably received and frictionally retained or cemented in a downwardly pre sented annular groove 72 in the collar 70, so that the cap 12 is effectively clamped between members 70 and 64.
  • the lower end of the collar may conveniently support the wiper ring 73 hereinbcfore referred to for sliding wiping engagement with the plunger tube 28 and for abutting engagement with the shoulder 39 of the plunger tube to limit the upward movement of the plunger.
  • the inner wall 76 of the collar above the wiper ring 73 preferably converges downwardly in the form of a conical sealing surface spaced from the plunger tube for reception of and sealing engagement with the depending annular sealing skirt 48 of the plunger head.
  • the skirt 48 and plunger head areboth preferably formed. integrally of a. resilient plastic such as polyethylene and the collar 70 is preferably formed of a substantially rigid material such as vinyl plastic.
  • the annular outer wall 80 of the collar is formed externally with screw threads 82 for cooperation with internal screw threads 84 on the depending inner wall portion of the protective cap 86.
  • cap 86 is disposed over the upper end of the plunger and plunger head and that its upper end engages the finger piece 46 to depress the plunger head and plunger to immobilized position as shown in Figure 1 when the cap 86 is threaded tightly onto the collar 70.
  • the collar is formed with an upwardly presented groove 88 inwardly of its threaded outer wall 80 for reception of a depending annular sealing ring 90 on the cap.
  • the dimensions of the groove and sealing ring are so related that the sealing ring 90 preferably makes a jamming fit into the groove 88.
  • the cap 86 be of resilient material in order that its conical interior sealing surface 92 may form a fluid tight sealing engagement with the conical peripheral surface 57' of the spray head and also so that its sealing ring 90 may form a yielding fluid tight fit within the groove 88.
  • the cap is thus formed of resilient plastic, however, it is subject to the usual and known difliculty that excessive tightening of the cap, as by automatic capping mechanism, may tend to expand the lower edge of the cap skirt so that the threads 84 of the cap will override and become disengaged from the threads 82 on the collar.
  • the depending ring or skirt 90 in addition to performing its sealing function, will resist such expansion tendency and thus adapt the resilient material caps for eflicient application by automatic capping mechanism.
  • the plunger head For the purpose of automatically centering the protective cap 86 and guiding its threaded skirt accurately onto the threads of the collar 70, there is provided on the plunger head a radially projected boss 94, the radially outer end of which lies on a common cone with sealing surface 57' and cooperates with the projecting conical periphery 57 to engage the conical inner surface of the cap and center same coaxially with respect to the plunger and the collar.
  • the plunger and plunger head are both rotatable together with respect to the barrel and container cap 12 and will thus facilitate threading of the protective cap 86 onto the collar 70.
  • container cap 12 and the protective cap 86 may be preassembled as a unit as in Figure 1 and thereafter applied to a bottle or other liquid container in obvious manner.
  • the ball 22 of the foot valve will be seated by engagement with the lower end of the tubular probe 34 and thus will prevent upward movement of any of the container contents past the valve seat or into the plunger.
  • While possibly liquid may be permitted to enter the space between the plunger and its barrel through port or ports After the pump has been used, it will be seen that a certain amount of residual liquid will tend to remain in the hollow plunger barrel, and when this plunger is then depressed incident to application of the protective cap 86, this will tend to expel such residual liquid outwardly from the discharge head 29.
  • the conical surface 57' and the boss 94 will coact with the conical inner surface 92 of the cap tocenter the latter, and therotatably disposed plunger accurately guides the threaded skirt of the cap onto the threaded collar 70, while permitting free rotation of the cap during its application to the collar.
  • sealing surface 76 Because ofthe axial disposition of sealing surface 76, it will be apparent that this surface will coact with the skirt or ring 48 to provide an effective seal for preventing leakage between the pump plunger and barrel throughout a substantial range of axial positioning of these parts, thereby permitting substantial manufacturing tolerances.
  • seals 4876 and the seal provided by cooperation between the plunger and foot valve 18, will effectively prevent leakage, both between the plunger and barrel and through the plunger, in the depressed and immobilized position of the plunger. Moreover, such position may be maintained either through the protective cap 86 or through the frictional action of the seals 48-76 as heretofore mentioned.
  • the plunger piston'30' consists basically of the downwardly flaring skirt of resilient plastic material, as heretofore, and includes an annular collar 36' by which it is supported in the lower end of the plunger tube 28.
  • the probe 34 is closed at its lower end and is surrounded by and includes a flaring resilient piston skirt 33 for snug fluid tight reception in the upper portion of the valve cage -18' in the depressed position of the valve plunger.
  • the probe 34 is hollow and is provided with one or more outwardly opening ports 35, so that when the piston skirt or plug 33 is withdrawn upwardly from the valve cage and into the relatively greater diameter pump barrel, the fluid is free to pass upwardly around the plug 33 and into the plunger barrel through the ports 35 incident to reciprocation of the plunger.
  • the probes 34-34 coact with the foot valve, though in somewhat different manners, to arrest the upward flow of the fluid from the tube 14 when the valve plunger is fully depressed.
  • the probes 34 and 34' may be used during assembly of the foot valve to force the valve element or ball 22 downwardly into its cage past the detainers or detents 26 or 26'.
  • a liquid dispensing pump comprising a generally vertical cylindrical barrel, an annular collar secured concentrically around the upper end of said barrel, a plunger reciprocally disposed in said barrel and projecting from the upper end of said barrel, the upper end of said plunger constituting a discharge head and having a liquid passage opening therethrough to define a discharge port, spring means coacting between said barrel and said plunger for urging the plunger upwardly from the barrel, a foot valve in the lower end of said barrel for permitting upward flow of liquid into said barrel, while preventing downward flow of said liquid and a probe carried at the lower end of said plunger for closing said valve in a predetermined position at the lowermost extremity of the reciprocating movement of said plunger, in combination with annular sealing surfaces formed on said collar and said plunger respectively, externally of the plunger for operative sealing engagement in said predetermined position of the plunger, to prevent upward leakage of liquid between the barrel and plunger, said liquid passage extending from said discharge port downwardly through said plunger and its said probe for normal communication with and control by said foot
  • liquid dispensing pump of claim 1 wherein said foot valve comprises a valve ball and a cylindrical valve cage confining said valve ball and of smaller diameter than the interior of said pump barrel and said plunger, and normally communicating at its upper end with the interior of said barrel, said plunger including a piston snugly reciprocally received in said pump barrel above said probe, said probe carrying a plug at its lower end for reception in said valve cage, said passage extending downwardly through said piston and opening between said piston and said plug.
  • a fluid dispensing pump the combination with a generally vertical cylindrical pump barrel having at its upper end a collar having threads thereon, of a plunger reciprocally disposed in said barrel and having at its upper end and above said collar .-a discharge head having a discharge orifice for fluid, spring means acting between said barrel and plunger for urging said plunger upwardly in said barrel, a check valve associated with said barrel to prevent downward movement of fluid therein, said plunger being forced to provide a discharge passage extending therethrough and communicating with said discharge orifice, a protective cap dimensioned to embrace said discharge head, said cap having a skirt for engagement with the threads on said collar to hold said plunger in a depressed and immobilized position against the action of said spring means, coacting sealing surfaces on said plunger and collar, said sealing surfaces being engaged when said cap is threaded on said collar to seal said barrel to prevent leakage externally of said plunger, means operable when said plunger is depressed and immobilized to seal said discharge passage to prevent leakage internally of said plunger
  • a fluid dispensing pump the combination with a generally vertical cylindrical pump barrel having at its upper end a collar having threads thereon, of a plunger reciprocally disposed in said barrel and having at its upper end and above said collar a discharge head having a discharge orifice for fluid, spring means acting between said barrel and plunger for urging said plunger upwardly in said barrel, a check valve associated with said barrel to prevent downward movement of fluid therein, said plunger being formed to provide a discharge passage extending therethrough and communicating with said discharge orifice, a protective cap dimensioned to embrace said discharge head, said cap having a skirt threaded for engagement with the'threads on said collar to hold said plunger in a depressed and immobilized position against the action of said spring means, coacting sealing surfaces on said plunger and collar, said sealing surfaces being engaged when said cap is threaded on said collar to seal said barrel to prevent leakage externally of said plunger, means operable when said plunger is depressed and immobilized to seal said discharge passage to prevent leakage internally of
  • a fluid dispensing pump the combination with a generally vertical cylindrical pump barrel having at its upper end a collar having threads thereon, of a plunger reciprocally disposed in said barrel and having at its upper end and above said collar a discharge head, spring means acting between said barrel and plunger for urging said plunger upwardly in said barrel, valve means associated with said barrel and plunger to prevent downward movement of fluid therein, said plunger being formed to provide a discharge passage extending therethrough and communicating with said discharge head, a protective cap dimensioned to embrace saidd-ischarge head, said cap having a skirt threaded for engagement with the threads on said collar to hold said plunger in a depressed and immobilized position against the action of said spring means, coacting sealing surfaces on said plunger and collar, said sealing surfaces being engaged when said cap is threaded on said collar to prevent-leakage from surrounding said discharge orifice and having a contour conforming with the contour of the interior surface of said cap and-positioned for sealing engagement with said cap in the depressed and immobilized position of
  • a fluid dispensing pump the combination with a generally vertical cylindrical pump barrel having at its upper end a collar having threads thereon, of a plunger reciprocally disposed in said barrel and having at its upper end and above said collar a discharge head, spring means acting between said barrel and plunger for urging said plunger upwardly in said barrel, valve means associated with said barrel and plunger to prevent downward movement of fluid therein, said plunger being formed to provide a discharge passage extending therethrough and communicating with said discharge head, a protective cap dimensioned to embrace said discharge head, said cap having a skirt threaded for engagement with the threads on said collar to hold said plunger in a depressed and immobilized position against the action of said spring means, coacting sealing surfaces on said plunger and collar, said sealing surfaces being engaged when said cap is threaded on said collar to seal said barrel to prevent leakage externally of said plunger, means operable when said plunger is depressed and immobilized to seal said discharge passage to prevent leakage internally of said plunger, and coacting sealing surfaces on said
  • a fluid dispensing pump the combination with a generally vertical cylindrical pump barrel having at its upper end a collar having threads thereon, of a plunger reciprocally disposed in said barrel and having at its upper end and above said collar a discharge head, spring means acting between said barrel and plunger for urging said plunger upwardly in said barrel, valve means associated with said barrel and plunger to prevent downward movement of fluid therein, said plunger being formed to provide a discharge passage extending therethrough and communieating with said discharge head, a protective cap dimensioned to embrace said discharge head, said cap having a skirt threaded for engagement with the threads on said collar to hold said plunger in a depressed and immobilized position against the action of said spring means, said discharge passage opening radially through said discharge head, said head beingformed to provide a sealing surface defining a portion of a downwardly diverging cone surrounding said opening, the conical axis of said sealing surface being coincident with the axis of the threads on said collar, said cap being formed internally with a sealing surface
  • a fluid dispensing pump comprising a generally vertical cylindrical pump barrel having at one end thereof a collar having threads thereon, a plunger reciprocally disposed in said barrel and having at its upper end and above said collar a discharge head, spring means acting between said barrel and plunger for urging said plunger upwardly in said barrel, valve means seating in said barrel below said plunger to prevent downward movement of fluid in said barrel, said plunger being formed to pro vide a discharge passage extending therethrough and communicating with said discharge head, a protective cap dimensioned to embrace said discharge head, said cap having a skirt threaded for engagement with the threads on said collar to hold said plunger in a depressed and immobilized position against the action of said spring means, coac,tin g sealing surfaces on said plunger and collar, said sealingsurfaces being engaged when said cap is threaded on said collar to prevent leakage from said barrel externally of saidplunger, means operable when said plunger is depressed and immobilized to seal said discharge passage to prevent leakage from saidbarrel intern-allyof said plunge
  • a fluid dispensing pump comprising a generally vertical cylindrical pump barrel, a plunger reciprocally disposed in said barrel and having at its upper end a discharge head, spring means acting between said barrel and plunger for urging said plunger upwardly in said barrel, valve means seating in said barrel below said plunger to prevent downward movement of fluid in said barrel, said plunger being formed to provide a discharge passage extending therethrough and communicating with said discharge head, means acting between said plunger and said barrel to hold said plunger in a depressed and immobilized position against the action of said spring means, means operable when said plunger is depressed and immobilized to seal said discharge passage to prevent leakage from said barrel internally of said plunger, said last named means including a probe at the lower end of said plunger forming a continuation of said discharge passage, said probe being formed to provide a seat engaging said valve means to hold the latter in the seated position in said barrel when said plunger is depressed and immobilized, whereby said valve means blocks both said barrel and said discharge passage, and coacting sealing surfaces on said cap and collar to
  • a fluid dispensing pump the combination with a generally vertical cylindrical pump barrel having at its upper end a collar having threads thereon, of a plunger reciprocally disposed in said barrel and having at its upper end and above said collar a discharge head having a dis charge orifice for fluid, spring means acting between said barrel and plunger for urging said plunger upwardly in said barrel, a check valve associated with said barrel to prevent downward movement of fluid therein, said plunger being formed to provide a discharge passage extending 11 therethrough and communicating with said discharge orifice, a protective cap dimensioned to embrace said discharge head, said cap having a skirt'threaded for engagement with, the threads on said collar to hold said plunger in a depressed and immobilized position against the action of said.
  • a fluid dispensing pump as claimed in claim 18 in which said means operable to seal said discharge passage comprises a probe carried by said plunger and engaging said check valve on depression of said plunger to hold said valve in seated position.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Closures For Containers (AREA)
  • Reciprocating Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)
US760042A 1958-09-09 1958-09-09 Fluid dispensing pumps Expired - Lifetime US2956509A (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
NL243140D NL243140A (ko) 1958-09-09
NL106608D NL106608C (ko) 1958-09-09
US760042A US2956509A (en) 1958-09-09 1958-09-09 Fluid dispensing pumps
GB29468/59A GB906875A (en) 1958-09-09 1959-08-28 Liquid dispensing pumps
DED31447A DE1266647B (de) 1958-09-09 1959-09-07 Kolbenpumpe
ES0251955A ES251955A1 (es) 1958-09-09 1959-09-08 Una bomba de distribuciën de fluidos
FR804627A FR1236720A (fr) 1958-09-09 1959-09-08 Pompe de distribution de liquides
BE582489A BE582489A (fr) 1958-09-09 1959-09-09 Pompes distributrices de fluides.
CH362033D CH362033A (fr) 1958-09-09 1959-09-09 Dispositif pour distribuer le liquide contenu dans un récipient

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US760042A US2956509A (en) 1958-09-09 1958-09-09 Fluid dispensing pumps

Publications (1)

Publication Number Publication Date
US2956509A true US2956509A (en) 1960-10-18

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ID=25057900

Family Applications (1)

Application Number Title Priority Date Filing Date
US760042A Expired - Lifetime US2956509A (en) 1958-09-09 1958-09-09 Fluid dispensing pumps

Country Status (8)

Country Link
US (1) US2956509A (ko)
BE (1) BE582489A (ko)
CH (1) CH362033A (ko)
DE (1) DE1266647B (ko)
ES (1) ES251955A1 (ko)
FR (1) FR1236720A (ko)
GB (1) GB906875A (ko)
NL (2) NL106608C (ko)

Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3064865A (en) * 1959-08-24 1962-11-20 Cook Chemical Company Sprayer head having improved sealing and discharging means
US3128718A (en) * 1961-05-08 1964-04-14 Stanley J Rhodes High pressure pump
US3185355A (en) * 1963-06-04 1965-05-25 Valve Corp Of America Pump for liquid containers
US3247849A (en) * 1963-03-28 1966-04-26 Calmar Inc Pump-type sprayer for liquids having a dual-purpose protective cap for pump sealing and directional spray control
US3248021A (en) * 1962-11-26 1966-04-26 Calmar Inc Liquid dispenser
US3361078A (en) * 1965-12-15 1968-01-02 Diamond Int Corp Liquid dispenser
DE1294298B (de) * 1963-10-08 1969-04-30 Cook Chemical Company Fluessigkeitszerstaeuber mit fingerbetaetigter Fluessigkeitskolbenpumpe
US3500761A (en) * 1968-07-01 1970-03-17 Cook Chem Co Control valve for hand pumps
US3531224A (en) * 1969-04-07 1970-09-29 Cook Chem Co Hand pump having free floating valve
US3608788A (en) * 1967-12-15 1971-09-28 Mitani Valve Co Ltd Fluid-dispensing pump
US4218198A (en) * 1978-11-02 1980-08-19 Security Plastics, Inc. Pump having non-throttling peripheral valve
US4286736A (en) * 1980-02-20 1981-09-01 Diamond International Corporation Liquid Dispenser
US4375266A (en) * 1980-11-18 1983-03-01 Realex Corporation Down-locking dispensing pump with side-orificed, product-mixing ball hold-down
US4410107A (en) * 1981-12-18 1983-10-18 Corsette Douglas Frank Liquid dispensing pump
US4512501A (en) * 1982-08-23 1985-04-23 Realex Corporatrion Down-locking dispensing pump with guided check valve hold-down structure
JPS62114672U (ko) * 1986-01-13 1987-07-21
US4895499A (en) * 1986-09-22 1990-01-23 The Wooster Brush Company Outlet valve assembly for paint sprayer
US6308865B1 (en) * 2000-10-24 2001-10-30 Hui-Yu Lin Container-mounted pump means with external restoring spring
DE10151781A1 (de) * 2001-10-19 2003-05-08 Steven Padar Abgabevorrichtung für Fluide
US20050067437A1 (en) * 2003-09-30 2005-03-31 Lewis Richard Paul Viscous liquid dispenser having leak prevention device
US20050133526A1 (en) * 2003-12-23 2005-06-23 Lewis Richard P. Mounting structure for viscous liquid dispenser
US20050133525A1 (en) * 2003-12-23 2005-06-23 Lewis Richard P. Lockout device for viscous liquid dispenser
US20060005389A1 (en) * 2002-12-26 2006-01-12 Jean-Louis Bougamont Process for integrating a ball valve in a pump body
US7114639B2 (en) 2003-12-23 2006-10-03 Kimberly-Clark Worldwide, Inc. Vent plug for self-contained viscous liquid dispenser
US20060280621A1 (en) * 2001-10-24 2006-12-14 Shigehisa Kinugawa Reciprocating pump and check valve
EP1803937A1 (en) * 2002-10-09 2007-07-04 Tacmina Corporation Reciprocating diaphragm pump and check valve
US20100219209A1 (en) * 2006-06-09 2010-09-02 Yaowu Ding Lotion pump
CN102713044A (zh) * 2010-01-12 2012-10-03 大宇电子株式会社 用于供应液体清洁剂的装置
US8783523B2 (en) * 2011-06-08 2014-07-22 Rexam Dispensing Systems S.A.S. Bottle for dispensing a fluid product
EP3754195A4 (en) * 2018-02-12 2021-09-29 Huizhou Hydro Caresys Medical Co. Ltd ELASTIC PISTON AND HIGH PRESSURE PUMP SYSTEM

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3333549A (en) * 1965-06-23 1967-08-01 Calmar Inc Liquid dispenser
IT8221773V0 (it) * 1982-05-04 1982-05-04 Sar Spa Pompetta a mano con cappuccio erogatore vincolabile in posizione abbassata, per l'erogazione di sostanze fluide.
IT1260302B (it) * 1993-03-12 1996-04-03 Taplast Srl Pompa dosatrice in plastica per l'erogazione di liquidi da contenitori
US5673824A (en) * 1995-05-31 1997-10-07 Taplast Srl Plastic dosing pump for dispensing liquids from containers
FR2781463B1 (fr) * 1998-07-24 2000-09-15 Oreal Pompe a reprise d'air
FR2781464B1 (fr) * 1998-07-24 2000-09-15 Oreal Pompe a clapet de refoulement comportant une bille
DE69812621T2 (de) * 1998-09-30 2004-02-05 Novares S.P.A. In Öffnungs- sowie Schliessstellung abgedichter, handbetätigter Spender
FR2823845B1 (fr) * 2001-04-20 2003-10-31 Rexam Sofab Dispositif pour le dosage de produits liquides ou en gel

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US1486600A (en) * 1921-10-18 1924-03-11 Nuhring Charles Pump fire extinguisher
US2024570A (en) * 1934-01-09 1935-12-17 Edward S Sheinberg Dispenser for perfume and the like
US2119884A (en) * 1936-06-22 1938-06-07 T J Holmes Company Inc Liquid sprayer
CH256416A (fr) * 1947-05-02 1948-08-31 Neuwerth Jules Pompe à piston à double effet.
US2586687A (en) * 1950-05-27 1952-02-19 Mellon Russell Closure cap for liquid spray containers
US2657834A (en) * 1948-10-12 1953-11-03 Pump It Inc Hand actuated dispenser pump
US2684182A (en) * 1952-03-29 1954-07-20 Pauline H Strauss Cigarette lighter fuel filler
US2870943A (en) * 1957-03-04 1959-01-27 Cook Chemical Company Pump-type liquid sprayer having hold-down cap

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US2593591A (en) * 1949-01-14 1952-04-22 Menkin Benjamin David Adjustable automatic fluid dispenser
FR1028776A (fr) * 1950-07-04 1953-05-27 Vaporisateur, à récipient élastique, perfectionné
CH304560A (de) * 1952-08-07 1955-01-15 Hussein Pascha S E Ilhamy Taschenzerstäuber.

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Publication number Priority date Publication date Assignee Title
US1486600A (en) * 1921-10-18 1924-03-11 Nuhring Charles Pump fire extinguisher
US2024570A (en) * 1934-01-09 1935-12-17 Edward S Sheinberg Dispenser for perfume and the like
US2119884A (en) * 1936-06-22 1938-06-07 T J Holmes Company Inc Liquid sprayer
CH256416A (fr) * 1947-05-02 1948-08-31 Neuwerth Jules Pompe à piston à double effet.
US2657834A (en) * 1948-10-12 1953-11-03 Pump It Inc Hand actuated dispenser pump
US2586687A (en) * 1950-05-27 1952-02-19 Mellon Russell Closure cap for liquid spray containers
US2684182A (en) * 1952-03-29 1954-07-20 Pauline H Strauss Cigarette lighter fuel filler
US2870943A (en) * 1957-03-04 1959-01-27 Cook Chemical Company Pump-type liquid sprayer having hold-down cap

Cited By (38)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3064865A (en) * 1959-08-24 1962-11-20 Cook Chemical Company Sprayer head having improved sealing and discharging means
US3128718A (en) * 1961-05-08 1964-04-14 Stanley J Rhodes High pressure pump
US3248021A (en) * 1962-11-26 1966-04-26 Calmar Inc Liquid dispenser
US3247849A (en) * 1963-03-28 1966-04-26 Calmar Inc Pump-type sprayer for liquids having a dual-purpose protective cap for pump sealing and directional spray control
US3185355A (en) * 1963-06-04 1965-05-25 Valve Corp Of America Pump for liquid containers
DE1294298B (de) * 1963-10-08 1969-04-30 Cook Chemical Company Fluessigkeitszerstaeuber mit fingerbetaetigter Fluessigkeitskolbenpumpe
US3361078A (en) * 1965-12-15 1968-01-02 Diamond Int Corp Liquid dispenser
US3608788A (en) * 1967-12-15 1971-09-28 Mitani Valve Co Ltd Fluid-dispensing pump
US3500761A (en) * 1968-07-01 1970-03-17 Cook Chem Co Control valve for hand pumps
US3531224A (en) * 1969-04-07 1970-09-29 Cook Chem Co Hand pump having free floating valve
US4218198A (en) * 1978-11-02 1980-08-19 Security Plastics, Inc. Pump having non-throttling peripheral valve
US4286736A (en) * 1980-02-20 1981-09-01 Diamond International Corporation Liquid Dispenser
DE3106190A1 (de) * 1980-02-20 1982-06-16 Diamond International Corp., New York, N.Y. Vorrichtung zur ausgabe von fluessigkeiten
US4375266A (en) * 1980-11-18 1983-03-01 Realex Corporation Down-locking dispensing pump with side-orificed, product-mixing ball hold-down
US4410107A (en) * 1981-12-18 1983-10-18 Corsette Douglas Frank Liquid dispensing pump
US4512501A (en) * 1982-08-23 1985-04-23 Realex Corporatrion Down-locking dispensing pump with guided check valve hold-down structure
JPH0639807Y2 (ja) 1986-01-13 1994-10-19 株式会社吉野工業所 液体射出器
JPS62114672U (ko) * 1986-01-13 1987-07-21
US4895499A (en) * 1986-09-22 1990-01-23 The Wooster Brush Company Outlet valve assembly for paint sprayer
US6308865B1 (en) * 2000-10-24 2001-10-30 Hui-Yu Lin Container-mounted pump means with external restoring spring
DE10151781A1 (de) * 2001-10-19 2003-05-08 Steven Padar Abgabevorrichtung für Fluide
US20060280621A1 (en) * 2001-10-24 2006-12-14 Shigehisa Kinugawa Reciprocating pump and check valve
US7566205B2 (en) 2001-10-24 2009-07-28 Tacmina Corporation Reciprocating pump and check valve
EP1803937A1 (en) * 2002-10-09 2007-07-04 Tacmina Corporation Reciprocating diaphragm pump and check valve
US20060005389A1 (en) * 2002-12-26 2006-01-12 Jean-Louis Bougamont Process for integrating a ball valve in a pump body
US20050067437A1 (en) * 2003-09-30 2005-03-31 Lewis Richard Paul Viscous liquid dispenser having leak prevention device
WO2005035140A1 (en) * 2003-09-30 2005-04-21 Kimberly-Clark Worldwide, Inc. Viscous liquid dispenser having leak prevention device
US7051903B2 (en) * 2003-09-30 2006-05-30 Kimberly-Clark Worldwide, Inc. Viscous liquid dispenser having leak prevention device
US7114639B2 (en) 2003-12-23 2006-10-03 Kimberly-Clark Worldwide, Inc. Vent plug for self-contained viscous liquid dispenser
US20050133525A1 (en) * 2003-12-23 2005-06-23 Lewis Richard P. Lockout device for viscous liquid dispenser
US20050133526A1 (en) * 2003-12-23 2005-06-23 Lewis Richard P. Mounting structure for viscous liquid dispenser
KR101127735B1 (ko) 2003-12-23 2012-03-23 킴벌리-클라크 월드와이드, 인크. 자체 수용형 점성 액체 분배기용 통기 플러그
US20100219209A1 (en) * 2006-06-09 2010-09-02 Yaowu Ding Lotion pump
US8573448B2 (en) * 2006-06-09 2013-11-05 Yaowu Ding Lotion pump
CN102713044A (zh) * 2010-01-12 2012-10-03 大宇电子株式会社 用于供应液体清洁剂的装置
CN102713044B (zh) * 2010-01-12 2016-04-06 大宇电子株式会社 用于供应液体清洁剂的装置
US8783523B2 (en) * 2011-06-08 2014-07-22 Rexam Dispensing Systems S.A.S. Bottle for dispensing a fluid product
EP3754195A4 (en) * 2018-02-12 2021-09-29 Huizhou Hydro Caresys Medical Co. Ltd ELASTIC PISTON AND HIGH PRESSURE PUMP SYSTEM

Also Published As

Publication number Publication date
GB906875A (en) 1962-09-26
NL106608C (ko)
FR1236720A (fr) 1960-07-22
CH362033A (fr) 1962-05-15
DE1266647B (de) 1968-04-18
ES251955A1 (es) 1960-03-16
NL243140A (ko)
BE582489A (fr) 1959-12-31

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