EP1836396A2 - Tete de pulverisation actionnee par batterie adaptable sur des contenants de pulverisation a pompe existants et produisant une pulverisation sensiblement continue - Google Patents

Tete de pulverisation actionnee par batterie adaptable sur des contenants de pulverisation a pompe existants et produisant une pulverisation sensiblement continue

Info

Publication number
EP1836396A2
EP1836396A2 EP06717853A EP06717853A EP1836396A2 EP 1836396 A2 EP1836396 A2 EP 1836396A2 EP 06717853 A EP06717853 A EP 06717853A EP 06717853 A EP06717853 A EP 06717853A EP 1836396 A2 EP1836396 A2 EP 1836396A2
Authority
EP
European Patent Office
Prior art keywords
cycle
spray
pump
sprayer according
sprayer
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.)
Withdrawn
Application number
EP06717853A
Other languages
German (de)
English (en)
Inventor
Steve L. Sweeton
Linn D. Wanbaugh
David L. Dejong
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.)
Silgan Dispensing Systems Corp
Original Assignee
MeadWestvaco Calmar Inc
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
Application filed by MeadWestvaco Calmar Inc filed Critical MeadWestvaco Calmar Inc
Publication of EP1836396A2 publication Critical patent/EP1836396A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
    • F04B35/04—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric

Definitions

  • This invention relates broadly to battery operated fluid pumps. More particularly, this invention relates to a battery operated fluid pump contained in a spray head which fits onto existing pump spray containers and which exhibits substantially continuous spray.
  • the propellant can be environmentally unfriendly. While environmentally friendly propellants do exist, generally, they do not charge as well as the unfriendly gases.
  • Still another popular sprayer is the air pump sprayer seen most frequently with insecticides and liquid garden products. The pump sprayer includes a hand operated air pump which is used to charge the container with compressed air. After it is charged, it operates much like an aerosol can. The pump sprayer is environmentally friendly but requires considerable effort to keep charged because air is not as efficient a propellant as environmentally unfriendly gases such as FREON or hydrocarbon gasses.
  • a battery operated spray pump includes a piston pump having a double wave cam which is pushed by a pair of rotating cam pushers coupled to the electric motor via a gear transmission.
  • the double wave cam has an unequal duty cycle, i.e. it uses more time to expel fluid from the piston cylinder than it uses in filling the cylinder.
  • the cam pushers rotate at a speed which, in conjunction with the duty cycle of the cam, produces a low pressure relatively constant stream.
  • the duty cycle of the cam is approximately 270° and the speed of the cam pushers is approximately three rotations per second.
  • Fig. 1 is a partially transparent side elevation view of a sprayer according to the invention
  • Fig. 2 is a partially disassembled perspective view of the sprayer of Fig. 1;
  • Fig. 3 is a further disassembled perspective view of the sprayer of Figs. 1 and 2;
  • Fig. 4 is an exploded perspective view of the motor drive components
  • Fig. 5 is an enlarged side elevation view of the double wave cam
  • Fig. 6 is an enlarged top plan view of the double wave cam
  • Fig. 7 is an enlarged side elevation view of the cam pusher
  • Fig. 8 is an enlarged top plan view of the cam pusher
  • Fig. 9 is an exploded perspective view of the piston pump components.
  • Fig. 10 is a view similar to Fig. 5 but of a presently preferred double wave cam.
  • a batteiy operated spray head 10 includes an ergonomic housing 12 coupled to a threaded bottle coupling 14 and including an adjustable nozzle 16 and a trigger 18.
  • the rear of the housing 12 includes a battery compartment 20 and extends rearward a sufficient amount to rest comfortably on the hand of the user when the user squeezes the trigger.
  • the power source batteries
  • the trigger 18 is arranged so that when it is squeezed, it operates a double valve 30 and an electrical switch 32.
  • One part of the double valve 30 fluidly couples the pump 28 to a tube (not shown) which extends from the valve 30 into the bottle i to wnicn the bottle coupling 14 is attached.
  • the other part of the double valve opens an air path from the atmosphere to the interior of the bottle 1 via a tube 34 which extends from an opening (not shown) in the housing 12 to the valve 30.
  • the double valve 30 and the electrical switch 32 are described in co-owned U.S. Patent Number 6,752,330 to DiMaggio et al., the complete disclosure of which is hereby incorporated by reference herein.
  • Fig. 4 illustrates parts of the motor drive and transmission subsystems. These pieces include a front mounting bracket 40, a rear mounting bracket 42, a pinion gear 44, a reduction gear 46 with associated axle 48, a cam pusher drive gear 50 with associated axle 52 and rear spacer 54, and a double wave cam 56.
  • the motor 24 is coupled to the front mounting bracket 40 with its drive shaft 24a extending rearward (see Fig. 3 as well).
  • the pinion gear 44 is coupled to the motor drive shaft 24a.
  • the reduction gear 46 is mounted between the front bracket 40 and the rear bracket 42 on its axle 48.
  • the large diameter portion 46a of the reduction gear 46 engages the pinion gear 44.
  • the small diameter portion 46b of the reduction gear 46 is engaged by the pusher drive gear 50.
  • the pusher drive gear 50 is mounted between the reduction gear 46 and the rear bracket 42 on the axle 52 which engages both the spacer 54 and the double wave cam 56 which is mounted in the front bracket 40.
  • the double wave cam 56 includes an inner cylinder 56a and an outer cylinder 56b, each being formed to present a cam surface 56c, 56d, respectively, at one end thereof.
  • the cam surfaces 56c, 56d are preferably identical in cam action (though having different diameters) and are offset from each other by 180 degrees.
  • a reduced diameter cylinder 56e extends axially therefrom and a pair of arms 56f, 56g extend radially outward.
  • the cammed end of the double wave cam 56 is designed to interact with the pusher drive gear 50 which is illustrated in detail in Figs. 7 and 8.
  • the pusher drive gear 50 is generally disk shaped having a central mounting hole 50a and an outer plurality of gear teeth 50b arranged along its perimeter.
  • a pair of cam pusher surfaces 50c, 50d are arranged on one side of the drive gear 50. These surfaces follow a circular path having the same center as me gear 50 but have unequal radii. The radii are chosen to match the diameters of the inner and outer cylinders 56a, 56b of the double wave cam 56.
  • the pusher surface 50c is dimensioned to interact with the cam surface 56c of the inner cylinder 56a of the double wave cam 56.
  • the pusher surface 50d is dimensioned to interact with the cam surface 56d of the outer cylinder 56b of the double wave cam 56.
  • the piston pump assembly 28 includes a generally T-shaped valve body 60 having three openings 60a-60c. Piston components 62-68 are fitted into the back opening 60a of the valve body 60. Inlet ball valve components and tube connector 70-78 are fitted in the bottom opening 60b of the valve body 60. Spray nozzle components 80-84 and 16 are fitted to the front opening 60c of the valve body 60.
  • the piston components include a spring 62, a piston 64, a piston rod 66, and a retainer cap 68.
  • the spring 62 is inserted into the rear opening 60a of the valve body 60 and abuts an interior annulus (not shown).
  • the piston 64 is inserted into the valve body 60 behind the spring which biases the piston backwards.
  • the piston rod 66 is inserted behind the piston 64 and the retainer cap 68 is attached by force fitting to the valve body 60.
  • the retainer cap 68 has a central opening through which the piston rod 66 extends.
  • the piston, piston rod, and the interior of the valve body wherein the piston moves are preferably coated with a silicone lubricant (not shown).
  • the inlet ball valve components include a ball cage 70 having interior vanes (not shown), a valve ball 72, a retainer tube 74, a tube connector 76, and an inlet elbow 78.
  • the retainer tube 74, adapter tube 76, and inlet elbow 78 are coupled to each other by epoxy and the retainer tube 74 is force fit into the bottom opening 60b of the valve body 60 capturing the ball 72 and the ball cage 70. It will be appreciated however that some or all of the retainer tube 74, adapter tube 76, and inlet elbow 78 may be integrally formed.
  • the spray nozzle components include a discharge valve 80, a volume reducer 82, spin mechanics 84, and an adjustable nozzle 16.
  • the discharge valve is a circular flapper valve having a post 80a which extends forward into the volume reducer 82.
  • the volume reducer occupies a cylindrical space having a diameter smaller than the diameter of the valve 80.
  • the volume reducer 82 has a forwardly extending post 82a upon which the spin mechanics 84 is mounted. All of those components are inserted into the forward end 60c of the valve Do ⁇ y o ⁇ and the nozzle 16 is snap fit over the forward end of the valve body 60 where it retains the other components but is free to rotate.
  • the transmission assembly 26 is mounted behind the piston pump assembly 28 with the double wave cam 56 mounted in the front bracket 40 by the arms 56f, 56g engaging slots 40a, 40b in the forward extending arms 40c, 4Od of the bracket 40.
  • the cam 56 is arranged so that its cam surfaces 56c, 56d face and engage the pusher surfaces 50c, 50d of the gear 50.
  • the pump assembly 28 is mounted between the arms 40c, 4Od of the bracket 40 with the piston rod 66 abutting the cylinder 56e of the double cam 56.
  • rotation of the motor drive shaft 24a causes rotation of the pinion gear 44 which rotates the reduction gear 48 at a slower rate.
  • the reduction gear 48 causes rotation of the drive gear 50.
  • the pusher surfaces 50c, 50d engage the cam surfaces 56c, 56d and cause the double wave cam 56 to reciprocate back and forth against the piston rod 66.
  • This causes the piston 64 to move back and forth in the valve body 60.
  • the ball 72 is lifted by negative pressure in the valve body 60, allowing liquid to enter the valve body from the container 1 (Figs. 1 and 2).
  • the flapper valve 80 is closed, preventing air from entering the valve body through the nozzle 16.
  • the forward moving duty cycle (the spray duty cycle) of the piston and the rearward moving duty cycle (the fill duty cycle) of the piston are unequal. In particular, this allows the piston to move more quickly during the fill duty cycle than during the spray duty cycle. In other words, the piston spends more time expelling fluid through the nozzle than it spends drawing fluid from the container into the valve body. This helps overcome the "pulsing" nature of certain prior art pumps and results in what appears to be a more continuous spray.
  • a 270° spray duty cycle and a 90° fill duty cycle is utilized. This arrangement is illustrated schematically in Fig. 10 which is similar to Fig. 5 with similar reference numerals
  • the cam surface 156d has a downward sloped portion 156d-l of approximately 90° and an upward sloped portion 156d-2 of approximately 270°.
  • the cam surface 156c has the same configuration as surface 156d, but offset by 180°.
  • the duty cycle can be optimized for different kinds of fluids, optimizing the spray characteristics vs. the perceived pulsation of the spray. For example, if the fill duty cycle is longer than the spray duty cycle, this allows for a higher pressure spray resulting in finer atomization and/or greater spray distance at the cost of perceived pulsation.
  • the transmission 26 is arranged so that the piston 64 cycles between two and ten cycles per second, and most preferably between 2.5 and 4 times per second. This, together with the spray duty cycle discussed above, results in an apparently constant stream at a relatively low pressure (5-200 psi).
  • the spray head of the invention is well balanced, small, and is retrofittable to many existing fluid containers taking the place of a manual spray pump.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Nozzles (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Catching Or Destruction (AREA)
  • Reciprocating Pumps (AREA)

Abstract

La pompe de pulvérisation actionné par batterie selon l'invention comprend une pompe à piston présentant une came à double ondulation qui est poussée par une paire de pousseurs de came rotatifs couplés au moteur électrique via une transmission par engrenages. La came à double ondulation présente un cycle opératoire inégal, c'est-à-dire qu'elle prend davantage de temps à expulser le fluide du cylindre à piston qu'à remplir le cylindre. Les pousseurs de came tournent à une vitesse qui, conjointement au cycle opératoire de la came, produit un jet basse pression presque constant.
EP06717853A 2005-01-13 2006-01-10 Tete de pulverisation actionnee par batterie adaptable sur des contenants de pulverisation a pompe existants et produisant une pulverisation sensiblement continue Withdrawn EP1836396A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11/034,600 US20060153707A1 (en) 2005-01-13 2005-01-13 Battery operated spray head retrofittable onto existing pump spray containers and producing substantially continuous spray
PCT/US2006/000701 WO2006076297A2 (fr) 2005-01-13 2006-01-10 Tete de pulverisation actionnee par batterie adaptable sur des contenants de pulverisation a pompe existants et produisant une pulverisation sensiblement continue

Publications (1)

Publication Number Publication Date
EP1836396A2 true EP1836396A2 (fr) 2007-09-26

Family

ID=36653421

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06717853A Withdrawn EP1836396A2 (fr) 2005-01-13 2006-01-10 Tete de pulverisation actionnee par batterie adaptable sur des contenants de pulverisation a pompe existants et produisant une pulverisation sensiblement continue

Country Status (6)

Country Link
US (1) US20060153707A1 (fr)
EP (1) EP1836396A2 (fr)
CN (1) CN101258326A (fr)
AR (1) AR052456A1 (fr)
TW (1) TW200630164A (fr)
WO (1) WO2006076297A2 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060208005A1 (en) * 2005-03-17 2006-09-21 Sweeton Steve L Compact battery operated spray head fittable onto existing pump spray containers and providing improved balance
US9545643B2 (en) 2008-10-22 2017-01-17 Graco Minnesota Inc. Portable airless sprayer
KR101708104B1 (ko) 2008-10-22 2017-02-17 그라코 미네소타 인크. 휴대용 에어리스 스프레이어
US11007545B2 (en) 2017-01-15 2021-05-18 Graco Minnesota Inc. Handheld airless paint sprayer repair
CN108685543A (zh) * 2018-03-28 2018-10-23 浙江欧琳生活健康科技有限公司 一种脉冲式清洗设备
WO2019199760A1 (fr) 2018-04-10 2019-10-17 Graco Minnesota Inc. Pulvérisateur sans air portatif pour peintures et autres revêtements
EP3976270A1 (fr) 2019-05-31 2022-04-06 Graco Minnesota Inc. Pulvérisateur de fluide portatif
US10968903B1 (en) 2020-06-04 2021-04-06 Graco Minnesota Inc. Handheld sanitary fluid sprayer having resilient polymer pump cylinder
US10926275B1 (en) 2020-06-25 2021-02-23 Graco Minnesota Inc. Electrostatic handheld sprayer
US11877572B2 (en) * 2021-01-06 2024-01-23 David Girag Portable flame propelling device

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Also Published As

Publication number Publication date
WO2006076297A3 (fr) 2008-01-03
AR052456A1 (es) 2007-03-21
WO2006076297A2 (fr) 2006-07-20
CN101258326A (zh) 2008-09-03
US20060153707A1 (en) 2006-07-13
TW200630164A (en) 2006-09-01

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