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Publication numberUS3680790 A
Publication typeGrant
Publication dateAug 1, 1972
Filing dateMar 24, 1971
Priority dateMar 26, 1970
Also published asCA949511A, CA949511A1, DE2113511A1
Publication numberUS 3680790 A, US 3680790A, US-A-3680790, US3680790 A, US3680790A
InventorsMichel Boris
Original AssigneeStep Soc Tech Pulverisation
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Dipper tube sprayer
US 3680790 A
Abstract
A sprayer wherein the dipper tube dipping into a liquid-carrying container is connected with a tube ending with a spraying nozzle through a sleeve-shaped piston controlled by the depression of last mentioned tube. The valve closing normally the passage through the piston is urged away by said depression of the tube against the action of a spring and its novelty resides in the provision of a thin peripheral lip provided in said valve and frictionally engaging the inner surface of the chamber so as to produce transiently a compression in said chamber when the valve is shifted by the sliding tube, after which the compressed liquid passes past the deformed lip towards the nozzle.
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Description  (OCR text may contain errors)

United States Patent Boris 1 Aug. 1,1972

[54] DIPPER TUBE SPRAYER [72] Inventor: Michel Boris, Paris, France [73] Assignee: Societe Technique de Pulverisation,

Paris, France [22] Filed: March 24, 1971 [21] App1.No.: 127,644

[30] Foreign Application Priority Data March 26, 1970France ..701 1074 1/1966 Green et al. ..239/579 X 7/1971 Green ..239/337 X Primary Examiner-M. Henson Wood, Jr. Assistant Examiner-Edwin D. Grant Attorney-Karl F. Ross [5 7] ABSTRACT A sprayer wherein the dipper tube dipping into a liquid-carrying container is connected with a tube ending with a spraying nozzle through a sleeve-shaped piston controlled by the depression of last mentioned tube. The valve closing normally the passage through the piston is urged away by said depression of the tube against the action of a spring and its novelty resides in the provision of a thin peripheral lip provided in said valve and frictionally engaging the inner surface of the chamber so as to produce transiently a compression in [56] References Cited .said chamber when the valve is shifted by the sliding UNITED STATES PATENTS tube, after which the compressed liquid passes past the deformed lip towards the nozzle. 2,748,985 6/1956 Seymour ..239/573 X I 7 3,187,963 6/1965 Anderson ..239/337 X 1 Claim, 1 Drawing Figure 13 3 -r 1 4 12 17 z a D 9 9 I/ 11 i l d l /\4 1 Li INVENTOR:

ATTORNEY DIPPER TUBE SPRAYER Dipper tube sprayers are known, which include a pumping chamber connected with the dipper tube, a sleeve-shaped delivering piston slidingly fitted inside said chamber, a tube axially slidable inside the sleeveshaped piston and opening into a spraying nozzle, a flap valve at the end of said tube opposed to the nozzle and adapted to engage a seat formed in the sleeve-shaped piston facing the chamber, means urging elastically the flap valve against said seat and consequently causing the sleeve-shaped piston to slide inside the pumping chamber towards the end of the latter facing away from the dipper tube and'hand-operable means shifting the sliding tube in antagonism with said elastic means to shift with a lost motion the sleeve-shaped delivering piston.

When such a sprayer is to be used, the sliding tube is urged downwardly in antagonism with the elastic means; the flap valve moves first off its seat so as to connect the pumping chamber with the nozzle, following which the sleeve-shaped piston is carried along in its turn so that the liquid within the chamber is propelled towards the nozzle and is sprayed by the latter.

If the sliding tube is depressed slowly, the delivering pressure is very low at the start and the liquid is not correctly atomized and it may sometimes pass out of the nozzle as a solid non-atomized jet.

The present invention has for its object improvements in atomizers of the above referred to type with a view to cutting out its drawback.

According to said invention, the flap valve is provided with a thin peripheral lip engaging the wall of the pumping chamber after the manner of a piston.

Thus, when the sliding tube begins moving, no liquid can pass as yet immediately into the atomizing or pumping chamber and is first subjected to a preliminary compression by the flap valve and its thin peripheral lip. Subsequently, when the pressure has reached a predetermined value, the thin lip is deformed by said pressure and allows the liquid to pass beyond it and to reach the nozzle under a pressure which ensures its proper atomization.

There is described hereinafter by way of example and in a non-limited sense an embodiment of a dipper tube atomizer according to the present invention, reference being made to the single figure of the accompanying drawing showing said atomizer in axial crosssectional view.

As illustrated, the atomizer includes a cylindrical body 1 adapted to be secured to a container 2 carrying the liquid to be atomized and to form a stopper for said container; to this end the body 1, made of plastics for instance, is tapped so as to be screwed over the neck of the container 2. An outer sleeve 3 is fitted with a force fit over the body 1.

Inside the body 1, there is provided a pumping chamber within an annular wall 4 the upper end of which carries an outer flange 4a held fast within a shoulder 1a closing partly the upper end of the body 1. The pumping chamber extends at its lower end so as to register with the dipper tube 5 which latter is closed at its upper end by a non-return ball valve 6.

Inside the pumping chamber 4, a sleeve-shaped piston 7 is slidingly fitted and, inside said piston 7, is

again slidingly fitted a tube 8 the lower end of which abuts against the upper tail-end 9a of a flap valve 9. A spring 10 fitted between the flap valve and the lower end of the pumping chamber urges said flap valve against its annular seat 1 1 provided at the lower end of the sleeve-shaped piston 7; the tail end 9a of the flap valve engages then the bore in said sleeve-shaped piston. A clearance 12 is provided within the inner surface of the latter'facing said tail end 9a and the lower end of the tube 8 which latter shows also a radial bore 13.

The upper end of this tube 8 is secured to a pusher member 14 and opens into an atomizing nozzle 15 extending through the side wall of said pusher member.

The sliding tube is provided at a point of its length with an annular shoulder 8a located, when the sprayer is inoperative, a short distance above the sleeve-shaped piston 7. The outer diameter of said annular shoulder is smaller than the inner diameter of a socket l6 fitted in the upper opening of the pumping chamber 4 and provided with an outer flange 16a clamped between the upper shoulder la of the body 1 and the outer flange 4a of the chamber wall.

The sleeve-shaped piston 7 is provided with an outer frustoconical surface 7a which engages, when the sprayer is inoperative, the lower edge of the socket 16.

According to the present invention, the flap valve 9 includes a thin peripheral lip 9b acting as a piston inside the pumping chamber 4 and the concavity of which faces the piston 7 in the case illustrated.

The drawing shows the sprayer in its inoperative condition for which the spring 10 holds the flap valve 9 on be observed.

When the operator depresses the pusher member 14, the flap valve 9 moves off its seat but the sleeve-shaped piston 7 remains transiently in the position illustrated by reason of the friction between it and the wall of the chamber 4. These conditions prevail until the shoulder 80 on the tube 8 impinges against the piston. From this moment onwards and as the operator continues depressing the pusher member 14, the piston 7 moves in unison with the tube 8, so that the liquid carried inside the chamber 4 is urged into the spraying tube 8 through the clearance 12 and the radial bore 13, the liquid being finally atomized through the nozzle 15. Furthermore, the opening 17 which is now uncovered connects the upper end of the container 2 with the atmosphere alongside the tube 8, which prevents said container from being subjected to a reduced pressure.

When the flap valve 9 begins sinking inside the chamber 4, its peripheral lip 9b first compresses the liquid inside said chamber, after which it is deformed by the liquid under pressure, so that it allows then the liquid to flow past it in a compressed condition towards the nozzle 15.

When the operator releases the pusher member, the flap valve 10 rises and engages its seat 1 which cuts the chamber 4 05 the bore in the tube 8 and the atmosphere. At the same time, the piston 7 rises and reduces the pressure in the chamber 4. This leads to a rise of the liquid out of the container 2 through the dipper tube 5. The frustoconical surface 7a of the sleeve 7 impinges then against the lower edge of the socket 16 and closes thus the opening 17 while the piston 7 and the tube 8 stop in the position then reached by them. The different parts of the sprayer have thus returned into their inoperative starting position as illustrated.

What I claim is:

1. In a sprayer including a compression chamber, a dipper tube forming an extension of said chamber, a sleeve-shaped piston slidingly fitted in said chamber and provided with an annular seat facing the chamber,

a tube slidingly adapted to engage the end of the piston opposed to the seat to urge said piston towards the dipper tube, a spraying nozzle at the end of the tube opposed to the piston and hand-operable means adapted to urge the tube downwardly into engagement with the piston, the combination of a flap valve adapted to engage the seat on the piston to close the passage through the latter and to be urged away from said seat by the sliding tube before the latter engages the piston end, said valve being provided with a thin peripheral lip frictionally engaging the inner surface of the chamber and elastic means fitted inside the chamber and urging the flap valve against its seat thereby to shift the piston away from the dipper tube.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2748985 *Jul 3, 1953Jun 5, 1956Seymour Edward HSpray package equipped with a selfcleaning valve
US3187963 *Mar 27, 1963Jun 8, 1965Johnson & Son Inc S CAerosol valve with means to lock same in the open position
US3231153 *Jan 3, 1964Jan 25, 1966GreenMultiple spray rate pressurized package dispenser
US3591088 *Dec 31, 1968Jul 6, 1971Green EdwardAtomizer sprayhead construction
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3724726 *Jan 5, 1972Apr 3, 1973Lion Fat Oil Co LtdPump for spraying
US3761022 *Apr 4, 1972Sep 25, 1973H KondoA spring pressure accumulative spray device
US3949939 *Mar 26, 1975Apr 13, 1976Smithkline CorporationMetered spray device
US4669664 *Nov 26, 1984Jun 2, 1987Waynesboro Textiles, Inc.Hand manipulatable sprayer
US4986453 *May 16, 1989Jan 22, 1991The Pittway CorporationAtomizing pump
US5085347 *Jan 24, 1991Feb 4, 1992Anchor Hocking CorporationPressurized dispenser package
US5655688 *Apr 28, 1995Aug 12, 1997Aptargroup, Inc.Atomizing pump with high stroke speed enhancement and valve system therefor
US5850948 *Sep 13, 1996Dec 22, 1998Valois S.A.Finger-operable pump with piston biasing post
US6016974 *Mar 27, 1998Jan 25, 2000Sar S.P.A.Micropump for the nebulization of fluids with enhanced metering valve
US6024540 *Sep 20, 1996Feb 15, 2000Navarro Bonet; Jose ManuelPump for pumping through a variable volume plunger chamber having a pair of plungers disposed in a stepped cylinder with a slide valve
US6112950 *Oct 24, 1996Sep 5, 2000Glaxo Group LimitedLow-friction valve stem
US6575339 *Feb 2, 2001Jun 10, 2003Gilles JourdinDispenser having a fixing member with peripheral sealing
US6905049 *Jun 3, 2004Jun 14, 2005QualipacDevice and assembly for dispensing a fluid
US20160223103 *Jan 30, 2015Aug 4, 2016Michael E. OsbornePipe Dope Applicator Apparatus
EP0127449A1 *May 24, 1984Dec 5, 1984Yoshino Kogyosho CO., LTD.Manual liquid dispenser
EP0221237A1 *May 24, 1984May 13, 1987Yoshino Kogyosho Co., Ltd.Manual liquid dispenser
Classifications
U.S. Classification239/353, 239/354, 222/402.1, 222/321.2, 239/372, 222/402.13, 239/350
International ClassificationB05B11/00
Cooperative ClassificationB05B11/3023, B05B11/007
European ClassificationB05B11/30C9, B05B11/00B9R