US3583605A - Liquid dispensing pump - Google Patents

Liquid dispensing pump Download PDF

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Publication number
US3583605A
US3583605A US792099*A US3583605DA US3583605A US 3583605 A US3583605 A US 3583605A US 3583605D A US3583605D A US 3583605DA US 3583605 A US3583605 A US 3583605A
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United States
Prior art keywords
piston
valve
pump
discharge
plunger
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Expired - Lifetime
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US792099*A
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English (en)
Inventor
Douglas F Corsette
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Silgan Dispensing Systems Corp
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Diamond International Corp
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Assigned to CALMAR, INC., 333 SOUTHL TURNBULL CANYON ROAD, CITY OF INDUSTRY, CA A CORP OF DE reassignment CALMAR, INC., 333 SOUTHL TURNBULL CANYON ROAD, CITY OF INDUSTRY, CA A CORP OF DE ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: DIAMOND INTERNATIONAL CORPORATION
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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
    • B05B11/1001—Piston pumps
    • B05B11/1023—Piston pumps having an outlet valve opened by deformation or displacement of the piston relative to its actuating stem
    • 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

Definitions

  • ABSTRACT A liquid dispensing pump for a portable con- Q DISPENSING PUMP :iner in which the pump piston is disposed for lost motion in 6 Chums 5 Drawing Figs. e pump cylinder between the plunger rod and a discharge valve earned by a stem affixed to the plunger rod and extend- [52] US. Cl 222/321, ing through the piston.
  • the piston has upwardly and 2 l7/550 downwardly presented elastomerlc skirts of which the lower [51] Int.
  • the invention relates to improvements in such a pump of the class in which the pump piston performs a valving action, and for this purpose is capable of a limited degree of movement with respect to the plunger rod into and from seating relation with a discharge valve fixed to the plunger rod to control the communication between the pump chamber and a discharge passage leading through the plunger to the atmosphere.
  • a discharge valve fixed to the plunger rod to control the communication between the pump chamber and a discharge passage leading through the plunger to the atmosphere.
  • the piston is provided with outwardly flaring upper and lower piston skirts for operative engagement with the cylinder wall on the upward or suction stroke and the downward or compression stroke of the piston, respectively.
  • the lower piston skirt cooperates with the discharge valve throughout the upward or suction stroke of the plunger, as well as in the raised position of the plunger, to seal of the plunger discharge passage from the pump chamber, while in the raised position of the plunger, the upper piston skirt cooperates with the venting valve to seal the vent passage leading from the container to the atmosphere.
  • the piston is customarily formed of a conventional elastomeric plastic material and such material generally is subject to shrinkage due to aging. Shrinkage of the piston skirts is manifestly undesirable as adversely affecting the sealing and wiping relationship between the piston skirts and the cylinder wall.
  • Further important features consist in facilitating the assembly of such a pump by forming the piston and its associated parts in a manner such that the opposite ends of the piston are symmetrically formed, thereby permitting reversal or inversion of the piston without affecting its operation; and in arranging the plunger discharge valve for engagement with the cylinder wall in advance of the piston, whereby to serve as a combined pilot and protector for the downwardly directed piston skirt during its assembly into the cylinder and thereafter, during use of the pump, to remove from the wall of the cylinder any solid materials which may have been prepicitated or coated thereon from the product being dispensed.
  • the piston though it encircles the valve stem of the discharge valve, is relatively spaced therefrom to permit free flow of liquid upwardly into the plunger discharge passage during the plunger compression stroke and also to permit a free floating action of the piston with respect to the valve stem whereby the piston may readily accommodate itself to positions in which it effectively achieves its valving and scaling functions.
  • FIG. 1 is a vertical cross section through a liquid dispensing pump in accordance with the invention, the pump plunger being shown in its fully raised position in which both the discharge passage through the plunger and the vent passage externally of the plunger are sealed to prevent escape of the contents from the container, (the latter being shown fragmentarily in broken lines).
  • FIG. 2 is a view similar to FIG. I, but with the plunger shown at the start of its downward or discharge stroke in which the vent passage and also the plunger discharge passage are open.
  • FIG. 3 is a view similar to FIG. 2, but with the plunger fully depressed at the end of its discharge stroke.
  • FIG. 4 is a view similar to FIGS. 2 and 3, but with the plunger at the start of its upper or suction stroke with the piston seated on the discharge valve to close the discharge passage while leaving the vent passage open.
  • FIG. 5 is a detailed cross section in the same plane as the other Figures showing a modified arrangement of the discharge valve.
  • the pump of the invention is adapted for application to a portable container such as a bottle, the upper end of which is depicted in broken lines in FIG. 1.
  • the pump structure comprises a pump cylinder 10 which is supported through an opening in the container cap 12 and depends into the container interior.
  • the pump plunger or plunger assembly comprises a tubular plunger rod 14 defining a discharge passage I6 leading to a suitable external discharge head 18 through which the plunger is adapted to be reciprocated by intermittent downward pressure on the plunger head. Return or upward movement of the plunger is produced by the usual plunger spring 20.
  • the plunger includes a combination valve and piston 22 which is in frictional wiping engagement with the cylinder wall and which has a limited degree oflongitudinal movement relative to the plunger rod for movement into and from operative engagement with a discharge valve 24 affixed to the plunger rod 14 and controlling the discharge port 26 through the piston 22.
  • a discharge valve 24 affixed to the plunger rod 14 and controlling the discharge port 26 through the piston 22.
  • the pump cylinder 10 depends into the container through its neck and is encircled by an annular flange 30 through which the cylinder is positioned and supported on the upper end of the neck.
  • the flange 30 is secured against the neck by means of the top wall 32 of the conventional container cap 12 which is threaded on or otherwise applied to the container.
  • a sealing liner or gasket 32 is interposed between the supporting flange and the container neck.
  • the housing also comprises a radially enlarged annular wall 34 which projects upwardly through an opening in the container cap and which has applied thereto a collar 36 defining a centrally located guide opening 38 through which the plunger rod is guided for reciprocation and having sufficient clearance with the plunger rod to avoid binding thereof as well as to permit a flow of air from the atmosphere inwardly into a venting or breather chamber 40 jointly defined by the wall and collar.
  • atmospheric air is admitted through the guide opening 38 and breather chamber 40 and thence through one or more vents 42 in the upper portion of the cylinder wall into the container interior to replace the liquid product which is withdrawn from the container by the pump.
  • the collar 36 in the instant embodiment is provided with a wall 44 encircling and fitted around the upwardly projecting wall 34 of the breather chamber and has an annular rib 46 abutting against and preferably welded or cemented to the upper end of the wall 44.
  • the concentric walls 44, 34 also may be cemented or welded together in fluidtight manner.
  • the venting valve 28 which may also include an auxiliary annular seal 48 which depends into the breather chamber 40 for cooperation with the piston in a manner hereinafter described.
  • the tubular plunger rod 14 as above mentioned is guided for reciprocation through the guide opening 38 with substantial clearance to permit the inflow of air through said opening.
  • the plunger rod 14 defines an internal discharge passage 16 for the product extending from the discharge port 26 through the piston upwardly to the generally conventional discharge head 18 on its upper or exterior end and through which the product is discharged, as by spraying into the atmosphere.
  • the discharge head illustrated in the instant embodiment is a spray head of the type more fully disclosed in the U.S. Pat. to Rex C. Cooprider No.
  • Such a spray head generally is provided with an upwardly presented finger piece 50, conveniently conform to receive intermittent finger pressure, the pressure being alternately applied to depress the plunger and then to permit its upward return projection by virtue of the action of the plunger spring 20.
  • Upward projection of the plunger rod is suitably limited as by means of upwardly presented shoulder 54 around the plunger rod disposed for abutting engagement with a downwardly presented shoulder within the guide opening 38 ofthe plunger.
  • valve stem 56 Affixed to and projecting downwardly from the plunger rod is a valve stem 56 which carries the discharge valve 24 at its lower end in spaced relation from the lower end of the plunger rod M.
  • valve stem 56 is frictionally fitted into the downwardly opening plunger discharge passage into engagement with a positioning shoulder 58 in such passage and the discharge passage, in turn, comprises a series of bypass grooves 60 extending downwardly around the valve stem.
  • the discharge valve 24 is of downwardly diverging frustoconical external configuration and is provided with radially outwardly projecting base 62 in operative sliding engagement with the cylinder wall, but arranged to permit the free flow of product therepast into the piston discharge port 26.
  • the base or pilot portion 62 of the discharge valve is of complete annular configuration and there are provided one or more passages 64' extending upwardly through the interior of the valve and opening radially outwardly into the pump cylinder between the pilot portion 62 and the piston 22.
  • the plunger spring is compressed between the discharge valve 24 and the lower end of the pump cylinder around the intake port 66.
  • the intake port 66 is controlled by a usual check valve 68 and communicates with the bottom of the container by way of a dip tube 70 of which only the upper end portion is illustrated.
  • the lower end of the spring rests on an annular ledge 72 in the cylinder concentric to the inlet port 66 and is provided with a constricted lower end convolution 74 positioned to permit but a limited amount of unseating of the check valve.
  • the discharge port 26 of the piston is defined by a bore therethrough through which the discharge valve stem 56 is received with substantial clearance so as to permit a flow of the product upwardly between the stem and the wall of the bore into the hollow piston rod 141 and to permit a limited amount of floating movement or displacement of the piston relative to the valve stem.
  • the frictional engagement between the piston 22 and cylinder wall causes the piston to lag behind the piston rod at the inception of each stroke, until the lost motion between the piston and piston rod is taken up.
  • the range of relative lost motion between the piston and piston rod is determined and limited by the oppositely axially presented stop shoulders 76 and 78 of the piston, adapted for alternate abutting engagement with the lower end of the plunger rod and the discharge valve, respectively.
  • Sealed communication between the discharge port 26 of the piston and the plunger discharge passage 16 is maintained at all times through a sealed telescoping connection between the piston and plunger rod, and defined in the present instance by an upwardly projecting sleeve 80 carried by the piston around the discharge port 26 and preferably formed with a radially projecting lip which is received in snug fluidtight sliding relation within an enlarged cylindrical socket 82 constituting the lower end of the discharge passage through the plunger rod.
  • the inner sealing rib 28 of the annular venting valve is proportioned for wedging reception within the conically upwardly flaring piston skirt 84 to exert a radial expansive force on this skirt when the skirt is urged upwardly by the discharge valve and plunger spring in the fully raised position of the plunger.
  • the inner surface of the skirt thus is in sealed relation with the annular sealing rib around its entire circumference.
  • the expansive action of the rib on the skirt urges its outer peripheral outer edge portion into sealing engagement with the encircling outer or auxiliary sealing rib 48 of the vent valve.
  • the coaction between the venting valve and the piston therefore, is such as to effect an efficient fluidtight seal preventing communication of the breather chamber 40 and vent 42 with the guide opening 38 through the collar 36.
  • the annular abutment shoulders 76 and 78 within the piston are axially located for alternate axial abutment with the annular lower end of the piston rod and the annular upper end of the discharge valve respectively, to transmit reciprocation from the plunger to the piston with a limited degree of lost motion sufficient to effect the desired valving action of the piston.
  • the respective stop shoulders are located to engage the associated ends in time to prevent direct axial abutment of the outwardly flaring end edges of the piston skirts 84 and 88 with either the collar or the pilot portion 64 of the discharge valve 24, thereby avoiding possible damage to the skirts and impairment of their sealing engagement with the cylinder wall.
  • the upper external end of the plunger including its discharge head will normally be covered by a protective overcap 92 (shown in FIG. 1) removably affixed to the collar in conventional manner to avoid inadvertent depression or reciprocation of the fully projected or raised plunger and to protect same against damage.
  • a protective overcap 92 shown in FIG. 1 removably affixed to the collar in conventional manner to avoid inadvertent depression or reciprocation of the fully projected or raised plunger and to protect same against damage.
  • the pressure of the plunger spring 20 against the discharge valve 24 will have fully projected the discharge valve 24 and plunger rod 14 to the full limit permitted by the stop shoulders 54 of the plunger rod and will thus have axially compressed the piston 22 between and in seated relation with respect to both the discharge valve 24 and the venting valve 28.
  • the discharge valve will thus bar the admission of the liquid product from the pump chamber into the discharge port 26 and passage 16.
  • the seating of the piston 22 with respect to the venting valve 28 will bar the escape of the liquid product from the container upwardly through the vent 42 and breather chamber 40 for escape or leakage through the collar guide opening 38 around the plunger rod.
  • the initial downward movement of the plunger rod 14 and discharge valve 24 will serve first to unseat the discharge valve from the piston 22, the latter remaining stationary within the cylinder until such time as its upper stop shoulder 76 is engaged by the downwardly presented end of the plunger rod, whereupon the upper skirt 84 of the piston is unseated from the vent valve 28 to commence its downward movement with the rest of the plunger assemble. Unseating of the discharge valve 24 will permit upward flow of the produce from the pump chamber (as shown by the arrows in FIG.
  • venting valves 28, 48 will then permit airflow either inwardly through the collar guide opening 38, thence through the chamber 40 and vent 42 to the container interior or vice versa, as necessary for pressure equalizing purposes,
  • the discharge valve 24 will remain unseated throughout the continuation of the downward or compression plunger stroke, until the plunger is in its fully depressed position, substantially as shown in FIG. 3 of the accompanying drawings, to permit discharge of the contents of the pump chamber until the completion of such stroke.
  • the plunger is shown shortly after it has commenced its return or upward stroke under the influence of the plunger spring 20. It will be understood that at the very inception of such stroke, the piston 22 will have remained stationary until the discharge valve 24 has moved upwardly sufficiently to engage the downwardly presented piston stop shoulder 78, following which the piston will be caused to move upwardly together with the rest of the plunger assembly.
  • the discharge port and passage will thus remain closed so that the piston may suck the liquid product upwardly through the dip tube 70 and intake port 66 past the check valve 68 and into the pump chamber, to be expelled on the next downward or compression stroke of the plunger assembly.
  • the upwardly projecting sealing sleeve 80 of the piston cooperates with the enlarged cylindrical socket 82 in the lower end of the piston rod to maintain a telescoping sliding seal effective in all relative positions of the piston and plunger rod to prevent leakage therethrough from the plunger discharge passage 16 into the breather chamber 40,
  • the product is barred from escaping into the annular space then existing between the lower end of the plunger rod and the upper piston skirt 84 to leak upwardly and outwardly through the plunger guide opening 38 of the collar.
  • the outer sealing surface of the discharge valve 24 by virtue of being thrust upwardly by spring pressure into the downwardly converging conical lower piston skirt 88, will tend to resiliently expand the latter until such time as the upper end of the discharge valve is engaged by the downwardly presented stop shoulder 76 of the piston, thereby providing a tight seal and urging the lower edge of the piston skirt 88 outwardly into sealing engagement with the cylinder wall.
  • the annular guide portion 62 or 62 of the discharge valve being of comparatively stiff structure as compared to the wiping edges of the piston skirts, prevents undue buildup of precipitates or coatings on the cylinder wall arising from product aging or instability and, further, such guide or pilot portion serves as a guard and lead-in for the piston during insertion of the plunger into the cylinder incident to assembly of the pump.
  • damage and/or deformation of the comparatively frail lower edge of the piston skirt are avoided during assembly of the pump components.
  • the leading or lower end edge of the plunger skirt will similarly be protected by the pilot portion of the discharge valve during handling and storage of such subassemblies.
  • the lower piston sleeve 90 engage and disengage the conical inner surface of the discharge valve 24 to thus perform its valving function in concert with the piston lower skirt 78, but, in addition, it provides an especially positive seal on the upward or suction stroke of the plunger, at which time the greater pressure above the plunger tends to expand the sleeve radially outwardly into sealing engagement with the valve.
  • the said sleeve will serve efficiently to bar the ingress of atmospheric air from the discharge passage 16 into the container due to increases in barometric pressure or to decreases ofthe internal pressure within the container.
  • a housing defining a pump cylinder, a breather chamber and a vent communicating with said chamber, said cylinder being formed with an inlet port into the lower end thereof and having a check valve operatively associated with said port, a collar defining the upper end of said housing and formed with a plunger guide opening therethrough in axial alignment with the cylinder, an annular venting valve depending from said collar around said opening, a tubular plunger rod guided for reciprocation through said opening and defining a discharge passage for the pump, means for limiting the upward movement of said plunger rod through the collar, a valve stem affixed to and depending axially from the plunger rod, a discharge valve carried by said stem in fixedly spaced relation below the said plunger rod, a spring compressed between said discharge valve and the lower end of the cylinder to resiliently urge the plunger rod and discharge valve to fully raised position, a piston of elastomeric plastic material having a bore therethrough slidably receiving said stem and defining a discharge port for

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Closures For Containers (AREA)
  • Reciprocating Pumps (AREA)
US792099*A 1969-01-17 1969-01-17 Liquid dispensing pump Expired - Lifetime US3583605A (en)

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US79209969A 1969-01-17 1969-01-17

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US792099*A Expired - Lifetime US3583605A (en) 1969-01-17 1969-01-17 Liquid dispensing pump

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JP (1) JPS5016527B1 (xx)
BE (1) BE744514A (xx)
DE (1) DE2001921A1 (xx)
FR (1) FR2028560A1 (xx)
GB (1) GB1265131A (xx)
NL (1) NL145021B (xx)

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US3796375A (en) * 1971-08-19 1974-03-12 Step Soc Tech Pulverisation Liquid spraying devices
US3908870A (en) * 1973-11-15 1975-09-30 Yoshino Kogyosho Co Ltd Manual-type miniature atomizer
DE2605474A1 (de) * 1975-02-12 1976-08-26 Valois Sa Dosierventil fuer aerosole
US4010874A (en) * 1975-06-26 1977-03-08 Wolf Steiman Pump for hand-held dispensers
US4017031A (en) * 1974-09-26 1977-04-12 Yoshino Kogyosho Co., Ltd. Miniature atomizer of manual type
US4023491A (en) * 1973-10-31 1977-05-17 Monarch Marking Systems, Inc. Ink fountain and supply system for a printing press
US4065038A (en) * 1976-04-07 1977-12-27 Realex Corporation Pump sprayer
US4082222A (en) * 1975-08-14 1978-04-04 Michel Boris Atomized liquid dispensing pump
US4173297A (en) * 1978-01-30 1979-11-06 The Risdon Manufacturing Company Non-throttling manually reciprocated plunger pump for consumer-type liquid dispensing containers
DE3111995A1 (de) * 1980-12-29 1982-08-05 Etablissements Valois S.A., 27110 Le Neubourg Behaelter mit abgabekopf fuer dickfluessige stoffe
US4607765A (en) * 1984-04-19 1986-08-26 S.A.R. S.P.A. Manually operated pump for the delivery under pressure of liquid substances
US4728008A (en) * 1985-08-27 1988-03-01 Ing. Erich Pfeiffer Gmbh & Co. Kg Dispenser for flowable media
US4960230A (en) * 1987-07-30 1990-10-02 Elettro Plastica S.R.L. Delivery pump for fluid containers
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US4986453A (en) * 1989-05-15 1991-01-22 The Pittway Corporation Atomizing pump
US4991746A (en) * 1989-07-07 1991-02-12 Emson Research Inc. Modular pump having a locking rotatable sleeve
US5054659A (en) * 1990-09-26 1991-10-08 Leeds And Micallef Double acting pump
US5405057A (en) * 1993-10-21 1995-04-11 Moore; David G. Manually actuated pump
US5439177A (en) * 1990-03-14 1995-08-08 Ing. Erich Pfeiffer Gmbh & Co. Kg Discharge head for discharge apparatuses such as manual pumps for discharging medium therethrough
US5513800A (en) * 1990-10-25 1996-05-07 Contico International, Inc. Low cost trigger sprayer having pump with internal spring means
EP0744217A1 (en) * 1994-12-09 1996-11-27 Yoshino Kogyosho Co., Ltd. Atomizer
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US5655688A (en) * 1994-10-19 1997-08-12 Aptargroup, Inc. Atomizing pump with high stroke speed enhancement and valve system therefor
US5671874A (en) * 1994-10-19 1997-09-30 Sofab Miniature dispenser pump and outlet valve for same
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US5794821A (en) * 1996-05-07 1998-08-18 Contico International, Inc. Reciprocating liquid pump with disc check valve for dispensing lotion and the like
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CN1107553C (zh) * 1997-05-29 2003-05-07 雷克姆斯Sofab股份公司 活节式活塞泵
US6634872B1 (en) * 1999-03-22 2003-10-21 Rexam Sofab Suction pump
US20030197033A1 (en) * 2002-04-17 2003-10-23 Valois S.A. Fluid dispenser pump
US20040217133A1 (en) * 2003-04-11 2004-11-04 L'oreal Pump and receptacle fitted therewith
US6921004B1 (en) * 2000-05-26 2005-07-26 Michael G. Knickerbocker Manually actuated pump assembly
US20050279770A1 (en) * 2004-06-22 2005-12-22 Lumson S.P.A Manually operable pump for dispensing creamy substances
US20060024185A1 (en) * 2002-09-03 2006-02-02 Aakerman Aake Nasal sprays
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US20070045349A1 (en) * 2005-08-25 2007-03-01 Continental Afa Dispensing Company Liquid dispensing pump with shifting liquid piston
US20080210713A1 (en) * 2007-01-23 2008-09-04 Yohann Langlois Pump for Dispensing a Dose of a Fluid Product and Range Comprising Such Pumps
US20100012682A1 (en) * 2006-06-29 2010-01-21 Andrea Marelli Pumps and Methods for Using the Same
CN1565754B (zh) * 2003-07-09 2010-10-20 丁要武 高粘料乳液泵
US20180086521A1 (en) * 2016-09-28 2018-03-29 The Procter & Gamble Company Closure mechanism that prevents accidental initial opening of a container
US10759576B2 (en) 2016-09-28 2020-09-01 The Procter And Gamble Company Closure interlocking mechanism that prevents accidental initial opening of a container
US10836560B2 (en) 2017-11-23 2020-11-17 The Procter And Gamble Company Closure for a container having an asymmetrical protrusion
US10836559B2 (en) 2017-11-23 2020-11-17 The Procter And Gamble Company Closure for a container comprising three positions

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IT1134954B (it) * 1981-01-07 1986-08-20 Sar Spa Pompa ad azionamento manuale per la erogazione sotto pressione di sostanze liquide e/o dense racchiuse in un contenitore sul quale la pompa e' montata
FR2526403A1 (fr) * 1982-05-10 1983-11-10 Ethyl Prod Ensemble a pompe actionne a la main
GB2231096A (en) * 1989-04-26 1990-11-07 Smiley Chien Pumping mechanism for dispensing lotion in bottle/container
US5839617A (en) * 1997-07-29 1998-11-24 Owens-Illinois Closure Inc. Pump dispenser
US6612468B2 (en) 2000-09-15 2003-09-02 Rieke Corporation Dispenser pumps
FR2840888B1 (fr) * 2002-06-18 2004-09-10 Lablabo Dispositif de distribution de plusieurs fluides comportant au moins deux poches souples et deux pompes
ITVI20040169A1 (it) * 2004-07-09 2004-10-09 Taplast Spa Unita' per l'erogazione di fluidi o miscele e relativo dispositivo di erogazione
US7802701B2 (en) 2005-01-14 2010-09-28 Rieke Corporation Up-lock seal for dispenser pump
DE102009022215B4 (de) * 2009-05-20 2011-06-22 LINDAL Dispenser GmbH, 23923 Ventil zur dosierten Abgabe von Flüssigkeiten
DE102009057070B9 (de) 2009-12-04 2012-11-29 Maquet Gmbh & Co. Kg Kolbenmaschine zum Einsatz als Vakuumpumpe für medizinische Zwecke

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US3359917A (en) * 1966-03-01 1967-12-26 Calmar Inc Liquid dispenser
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Also Published As

Publication number Publication date
FR2028560A1 (xx) 1970-10-09
NL145021B (nl) 1975-02-17
DE2001921A1 (de) 1970-07-23
NL7000591A (xx) 1970-07-21
BE744514A (fr) 1970-07-01
JPS5016527B1 (xx) 1975-06-13
GB1265131A (xx) 1972-03-01

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Owner name: CALMAR, INC., 333 SOUTHL TURNBULL CANYON ROAD, CIT

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Effective date: 19831118

Owner name: CALMAR, INC., 333 SOUTHL TURNBULL CANYON ROAD, CIT

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:DIAMOND INTERNATIONAL CORPORATION;REEL/FRAME:004199/0053

Effective date: 19831118