US2119884A - Liquid sprayer - Google Patents

Description

June 7, 1938. F. w. LoHsE LIQUID SPRAYER Filed June 22, 193s 12106176024 TW by a Lied /fwl/wormg www,

W////// Q\\ w Patented June 7, 1938 UNITED s'rii'rlss LIQUID SPBAYEB Frederlek w. Lome, Attleboro, Mese., einer to T. J. Holmes Company, Inc., a corporation of Massachusetts Application June 22,'

1 Claim.

This invention relates toliquid sprayers of the Y general type used for spraying liquids upon windows, house plants, clothing and for other purposes and is intended to provide simple and eiiective means for economically performing its Afunctions while also making provisionfor convement and safe transportation when filled, or partly lled, with liquid without danger of leakage of the contents.

With the objects in view the invention comprises a bottle closure removably attachableto a bottle or other container and provided with a movable plunger piston and a liquidchamber, the closure being provided with removable sealing means which serves both to prevent leakage of the liquidcontent to the outside and to retain the plunger in a depressed position to avoid the filling of the outlet conduit which forms a hollowl stem for the piston.

In the accompanying drawing I have illustrated embodiments of the invention to dierent forms of sprayer devices, in which- Fig'. 1 is a vertical sectionillustrating a container provided with my improvement, the sealing cap being removed and the plunger standing in its normal raised position.

Fig. 2 is a central sectiorron a plane at right angles to Fig. 1 showing the upper part ci `the container with the plungerdepressed by engagement with the leak-prooi.' sealing cap.

Fig. 3 illustrates a modified form of piston chamber construction in which the coiled spring is placed outside of the piston chamber and above it, instead of inside and beneath the piston. TheV diameters oi the piston stem and its bore are, for the sake of clear illustration, much exaggerated in comparison with actual practice.

In the practice o f my invention according to` the illustration in the drawing, A indicates a bottle or similar container having' an externally threaded neck portion for the reception of an internally threaded closure or cap pl, which is provided with interior washer 2 and an exterior washer 3 around a central opening through which 45 1s inserted e'. eentrslneaded thread 4, whose head is externally threaded and whose inwardly DIO- jeting shank portion is threaded to receive a clamping nut i.

, l 'I'he threaded plug l is providedwith a smooth rcylindrical axial bore 'and in fthis bore 0r PES- sage is sliding'l'y mounted agclse tting hollow plunger stem 6. .lTofthe top of theplunger stem l6 n is -secured a spraying' block having, in this case, a transversely bored passage for the reception of a hollow nomle member 8. in which is inserted Norton, Hall.,

193s, semi Ne. sessi- (cl. ce1-ss) an externally threaded plug toassist the spraying of the liquid but restricting its escape and giving it a whirling motion before it passes out `through the-very small nozzle openingy I0. The

sprayer block 'I is' also provided with a diametri- 5 cal groove or recess extending inthe vertical plane of the spray nozzle, so that when the nger is pressedfinto this groove the spray points in the direction of the finger.

' To render the sprayer safe for transportation 10 in a trunk or container with other articles, which would be injured by leakage of the liquid, I provide a cup-shaped sealing cap I2 dimensioned'to cover and overlap the sprayer head 1, the bottom or open end of the cap being vinternally` threaded 15 to screw upon the threads l* of thel central member 4 of the closure cap. While a few drops of liquid may leak out of the nozzle under certain conditions, nevertheless it can not escapeto the outside because the sealing cap, when screwed -down tightly against the washer I, forms a positive and reliable seal wholly preventing any possible escape oi' the liquid,either through the nozzle or through the joint between the central plug 4 and the closure.

-A cylindrical piston I3 is secured to the lower end of the plunger stem 8 and, as shown, is provided with an internal vvalve chamber in which is mounted a check valve II in the form` of a ball closing the central passage in the lower end oi the piston when the piston moves to the top of the surrounding piston chamber I8 after the liquid has been expelled by the downward stroke. The object of the Ovalve is to prevent weakening the partial vacuum in the piston chamber l'created by the upward stroke of the pump and means is providedto prevent the check valve member I5 from closing the liquid outlet passage formed through the stem` 6 in any suitable manner, as by means oi.' an in-turned lip Il at the lower end of the piston stem.

It will-be observed that the piston or pump chamber is closed at the bottom and is surrounded by an elongated shell annularly spaced'irom the outside of thepiston chamber. The piston y chamber is also provided with inlet holes I8* immediately below the levell of the bottom of the piston when the piston is in raised position'. A helical spring I8 is seated upon the closed bottom ofI the'pump chamber and exerts an upward pressure or thrust against the bottom of the piston.l The outer shell I1 has itsI upper portion contracted to t snugly, around the open or upper end of the piston chamber I6 and has its upper portion iii-turned tov form -an annular flange I1", which closelynts around the piston stem and serves as a stop for the upward stroke of the piston.

When the piston is depressed by pressure of the ngers upon the spray block 1 after its bottom 'has passed below the level of the liquid inlet opening I6, the only escape -for the liquid .1S through the hollow piston stem to the sprayer head, as it will be seen that the piston itself acts as a valve preventing the escape of liquid through the passages IS during the remainder of the down stroke after it has passed belowV said passages. Upon the release of pressure on the spray head the piston is rapidly returned to its uppermost position creating a partialvacuum,so that s the liquid in the bottle, so long as the lower end .a suction for the purpose of supplying theplston chamber with more liquid.-

In Fig. 3 is shown a pump chamber in which thevpiston I3 does not act as a valve and a check valve 20 is provided at the bottom inlet passage resting upon a centrally bored seat member' 2|,v

the bottom of the piston chamber being provided with a Valve-controlled inlet opening; The

object of extending the exterior skirt or shell` .I 1 down almost to the bottom of the pump chamber, to which it is secured, is to permit the removal of liquid until the bottle is practically emptied. l

While thel return spring is shown in Fig. 1 as inserted in-the piston chamber itself, in the form shown in Fig. 3 I have shown the return spring 22 surrounding the piston stem and interposed between the top of the piston chamber andv a stop member 23 secured to the piston stem 8 at a suitable distance above the piston I3 to permit the piston to have its full stroke downward and upward.

'I'he closure parts are shown in the drawing as composed of rubber or bakelite,'so that the device may be used for liquids which are likely to attack metal, but obviously they may be made of any suitable material.v

What I claim is:

In a spraying device for liquids, a bottle having a threaded neck, a reciprocating pump mounted withinthe bottle, a hollow pump rod connected to the pump for reciprocation thereof and extending outwardly through the bottle neck, a cap for the bottle having a flat upper face and a threaded bore in which the bottle neck. is re"- ceived, an enlarged washer applied to the upper face of the cap, a washer appliedv to the bottom of the `cap bore and' engaging the endv of the bottle neck, a hollow plug for supporting the pump rod, said plug having an enlarged externally threaded head of less diameter than the washers seated` against the upper washer, and a A

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