|Número de publicación||US20060153707 A1|
|Tipo de publicación||Solicitud|
|Número de solicitud||US 11/034,600|
|Fecha de publicación||13 Jul 2006|
|Fecha de presentación||13 Ene 2005|
|Fecha de prioridad||13 Ene 2005|
|También publicado como||CN101258326A, EP1836396A2, WO2006076297A2, WO2006076297A3|
|Número de publicación||034600, 11034600, US 2006/0153707 A1, US 2006/153707 A1, US 20060153707 A1, US 20060153707A1, US 2006153707 A1, US 2006153707A1, US-A1-20060153707, US-A1-2006153707, US2006/0153707A1, US2006/153707A1, US20060153707 A1, US20060153707A1, US2006153707 A1, US2006153707A1|
|Inventores||Steven Sweeton, Linn Wanbaugh, David DeJong|
|Cesionario original||Sweeton Steven L, Wanbaugh Linn D, Dejong David L|
|Exportar cita||BiBTeX, EndNote, RefMan|
|Citas de patentes (29), Citada por (3), Clasificaciones (4), Eventos legales (1)|
|Enlaces externos: USPTO, Cesión de USPTO, Espacenet|
1. Field of the Invention
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.
2. State of the Art
Many household and industrial products are sold in containers that include a sprayer. These products include cleansers, insecticides, polishes, waxes, etc. There are several kinds of sprayers used with these products. Perhaps the most common is the manual push button or trigger operated pump which is seen most frequently on liquid cleansers. It has the advantage of being environmentally friendly (i.e. it does not require a propellant) but the disadvantage of delivering fluid in a series of pulses rather than in a continuous spray. Another well known sprayer is the aerosol can which is sealed and charged with a gas propellant. This sprayer has the advantage that it dispenses fluid in a continuous spray, but has several disadvantages. One disadvantage is that the can cannot be refilled. Another disadvantage is that depending on the gas used to charge the container, 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.
In recent years there has been some experimentation with battery powered pump sprayers. Most of these devices include a spray mechanism which is similar to the ubiquitous push button (or trigger) pump sprayer but which is coupled to a battery powered electric motor by some type of linkage which converts the rotary action of the motor into an oscillatory motion to drive the pump piston. Many of these battery operated pump sprayers are designed to work only with a specially constructed bottle, i.e. they are not retrofittable to existing pump spray bottles. Many also have weight distribution problems, i.e. they are top heavy and cause the bottle to which they are attached to tip over. Many of these battery powered pumps have large priming volumes, thus causing a delay between the time the pump is activated and the time liquid begins to be dispensed. Significantly, these pumps do not really provide a constant spray. They provide a continuous pulsed spray like that obtained by repeatedly squeezing the trigger of pushing the button on a hand operated spray pump.
It is therefore an object of the invention to provide a battery operated spray pump.
It is another object of the invention to provide a battery operated spray pump that is retrofittable to an existing spray bottle.
It is an additional object of the invention to provide a battery operated spray pump which produces a substantially continuous spray rather than a pulsed spray.
In accord with these objects, which will be discussed in detail below, a battery operated spray pump according to the invention 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. According to the presently preferred embodiment, the duty cycle of the cam is approximately 270° and the speed of the cam pushers is approximately three rotations per second.
Additional objects and advantages of the invention will become apparent to those skilled in the art upon reference to the detailed description taken in conjunction with the provided figures.
Turning now to
The motor 24 is coupled to the front mounting bracket 40 with its-drive shaft 24a extending rearward (see
Turning now to
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
Turning now to
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 60 a 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 60 b 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 80 a 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 82 a upon which the spin mechanics 84 is mounted. All of those components are inserted into the forward end 60 c of the valve body 60 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.
Referring back to
From the foregoing, those skilled in the art will appreciate that rotation of the motor drive shaft 24 a 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. As the drive gear 50 rotates, the pusher surfaces 50 c, 50 d engage the cam surfaces 56 c, 56 d 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. When the piston moves backwards, the ball 72 is lifted by negative pressure in the valve body 60, allowing liquid to enter the valve body from the container 1 (
According to the presently preferred embodiment, 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. According to the presently preferred cam arrangement, a 270° spray duty cycle and a 90° fill duty cycle is utilized. This arrangement is illustrated schematically in
Further, according to the presently preferred embodiment, 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.
There have been described and illustrated herein several embodiments of a battery operated spray head retrofittable to existing pump spray containers. While particular embodiments of the invention have been described, it is not intended that the invention be limited thereto, as it is intended that the invention be as broad in scope as the art will allow and that the specification be read likewise. It will therefore be appreciated by those skilled in the art that yet other modifications could be made to the provided invention without deviating from its spirit and scope as claimed.
|Patente citada||Fecha de presentación||Fecha de publicación||Solicitante||Título|
|US3173584 *||15 Nov 1962||16 Mar 1965||Giavasis Steve T||Portable motor driven dispensing devices|
|US3255967 *||18 Mar 1964||14 Jun 1966||Me Hi Entpr Inc||Fog dispenser having a motor for simultaneously operating a pump and impeller|
|US3901449 *||1 Mar 1974||26 Ago 1975||Hudson Mfg Co H D||Cordless electric sprayer|
|US4151375 *||11 May 1977||24 Abr 1979||Societa Italiana Telecomunicazioni Siemens S.P.A.||System for selectively shifting groups of bits for temporary storage in a processor memory of a telephone exchange|
|US4273269 *||30 Jul 1979||16 Jun 1981||Davis George B Jun||Hand held electric caulking gun|
|US4322022 *||19 Mar 1980||30 Mar 1982||Whirlco, Inc.||Quick release for helically-threaded drive unit|
|US4721439 *||15 May 1986||26 Ene 1988||Wiwa Wilhelm Wagner Gmbh & Co. Kg||Piston pump and drive therefor|
|US4750641 *||24 Sep 1986||14 Jun 1988||Chin Fu Hun||Continuous water-ejecting pistol toy with simultaneous sound and red-flash effects|
|US4790454 *||17 Jul 1987||13 Dic 1988||S. C. Johnson & Son, Inc.||Self-contained apparatus for admixing a plurality of liquids|
|US5150841 *||23 May 1991||29 Sep 1992||Dowbrands Inc.||Liquid spray dispenser|
|US5259557 *||10 Mar 1993||9 Nov 1993||Ecolab Inc.||Solution proportioner and dispensing system|
|US5286177 *||10 Dic 1991||15 Feb 1994||Beckman Instruments, Inc.||Fluid pump having floating reciprocating shaft|
|US5310089 *||22 Mar 1993||10 May 1994||Hudgins Richard G||Liquid dispensing system|
|US5397034 *||13 Sep 1993||14 Mar 1995||Wunsch; Eckart||Finely atomizing device for fluids|
|US5465444 *||28 Jul 1993||14 Nov 1995||Bausch & Lomb Incorporated||Electric toothbrush|
|US5716007 *||29 Dic 1995||10 Feb 1998||Nottingham-Spirk Design Associates, Inc.||Battery operated fluid dispenser|
|US5733105 *||19 Mar 1996||31 Mar 1998||Micropump, Inc.||Axial cam driven valve arrangement for an axial cam driven parallel piston pump system|
|US5797722 *||25 Abr 1997||25 Ago 1998||Toyota Jidosha Kabushiki Kaisha||Fluid pump|
|US6092998 *||20 Mar 1998||25 Jul 2000||Devilbiss Air Power Company||Pump for a pressure washer|
|US6502766 *||24 Jul 2000||7 Ene 2003||The Procter & Gamble Company||Liquid sprayers|
|US6554211 *||1 Ago 2002||29 Abr 2003||Saint-Gobain Calmar Inc.||Container vent control for battery operated sprayer|
|US6752330 *||23 Jul 2001||22 Jun 2004||The Procter & Gamble Company||Liquid sprayers|
|US6811099 *||21 Nov 2002||2 Nov 2004||Saint-Gobain Calmar Inc.||Battery pack for battery operated sprayer|
|US6981658 *||28 Oct 2002||3 Ene 2006||The Procter & Gamble Company||Liquid sprayers|
|US7032841 *||27 Abr 2004||25 Abr 2006||Swisher Steven L||Hand-held battery power sprayer|
|US7063240 *||29 Abr 2004||20 Jun 2006||Niswonger John O H||Powered caulking gun|
|US20040211792 *||13 Abr 2004||28 Oct 2004||Nottingham-Spirk Design Associates, Inc., An Ohio Corporation||Pump drive unit for battery operated fluid dispensers|
|US20060076434 *||22 Sep 2005||13 Abr 2006||James Russell Hornsby||Power sprayer|
|US20060076435 *||13 Oct 2004||13 Abr 2006||Hudson William A||Battery-powered pump for liquid sprayer|
|Patente citante||Fecha de presentación||Fecha de publicación||Solicitante||Título|
|US8596555||22 Oct 2009||3 Dic 2013||Graco Minnesota Inc.||Portable airless sprayer|
|US20060208005 *||17 Mar 2005||21 Sep 2006||Sweeton Steve L||Compact battery operated spray head fittable onto existing pump spray containers and providing improved balance|
|WO2006101730A2 *||8 Mar 2006||28 Sep 2006||Saint Gobain Calmar Inc||Compact battery operated spray head fittable onto existing pump spray containers and providing improved balance|
|Clasificación de EE.UU.||417/411|
|11 Abr 2005||AS||Assignment|
Owner name: ST. GOBALN-CALMAR, INC., MISSOURI
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SWEETON, STEVEN L.;WANBAUGH, LINN D.;DEJONG, DAVID L.;REEL/FRAME:016051/0768;SIGNING DATES FROM 20050111 TO 20050112