US2918221A

US2918221A - Sprayer

Info

Publication number: US2918221A
Application number: US700183A
Authority: US
Inventors: Viard Marcel
Original assignee: Individual
Current assignee: Individual
Priority date: 1957-09-19
Filing date: 1957-12-02
Publication date: 1959-12-22
Anticipated expiration: 1976-12-22

Description

mgm A Dec. 22, X959 M. VIARD 2,918,221

SPRAYER FiledDeC. 2. 1957 nire rates The invention relates to sprayers or vaporizers of the type comprising a fluid-tight liquid container which does not communicate with the atmosphere and which, when in its position of use, creates a liquid head relative to the spray orice.

An object of the invention is to ensure certain operation of this type of sprayer and to prevent any leakage of the liquid, especially when the apparatus is not in use.

To this end, a passageway which is provided in a spray head and places the liquid container in communication with a spray orifice is closed by a valve whose stem is connected to the control knob of an air pump.

It will be understood that in this arrangement when the knob is returned to its normal inoperative position, the valve is applied against its seat and communication be tween the container and the spray orice is precluded.

In a preferred embodiment, the stem of the valve is slidably mounted in a hollow extension of the knob with interposition of an abutment ensuring the return of the valve to its seat at the end o'f the return travel of the knob.

This arrangement limits the travel of the valve to a mere separation of the valve from its seat, thereby ensuring that penetration of its stem in the container does not create in the latter a suction which would expel an excess of liquid.

Further features and advantages of the invention will be apparent from the ensuing description with reference to' the accompanying drawing, to which the invention is in no way restricted.

In the drawing:

Fig. l is a fragmentary, longitudinal sectional View of an embodiment of the sprayer according to the invention in its inoperative position;

Fig. 2 is a view similar to Fig. l, and is illustrative of the sprayer at the end of its travel in position for spraying, and

Fig. 3 is a fragmentary, longitudinal sectional view of a modification of the invention.

With reference to Figs. l and 2, the sprayer or vaporizer comprises a container 1 connectable in a removable manner by an externally threaded neck 2 to a spray head or spraying attachment having a body formed as an elongated, tubular member 3. The member 3 is provided with a spray or vaporization orifice 4 open to the atmosphere communicating with an annular first chamber 5 member 3 which communicates with the interior of the container 1 through an inclined passageway 6 formed in a transverse partition 3 which divides the member 3 into an annular chamber 5 and a second chamber 8 axially spaced therefrom. A second passageway 7 in the partition provides communication between the two' chambers. The chamber 8 forms the cylinder of an air-pump having a reciprocable piston 9 for compressing air therein. The piston is operably connected to a knob 10 slidable internally of chamber 8 and manually depressible to reciprocate the piston 9 which is constantly biased by formed in the head body 3.

resilient means comprising a spring 11 to an inoperative or normal rest position as shown in Fig. l.

Between the neck 2 of the container 1 and the body of the spray head body 3 is disposed a sealing element 12 of plastic material fixed to the body 3 and pro'vided with a screw-thread corresponding to the threads on neck 2 to insure a fluid-tight connection. The sealing element 12 has a portion 12 extending transversely across the body member 3 to close olf the mouth of the container 1 and overlies partition 3 so as to make chamber 5 Huid-tight except for the orifice 4 and the passageway 6. An opening 13 is provided in portion 12 of the sealing element and is defined by raised lip 12a forming a valve seat. The opening is so arranged that passageway 6 can communicate with the interior of the container 1 only through opening 13.

The opening 13 is opened and closed by a valve member 14 provided with a plastic element 15 seatable on the valve seat. The valve member 14 has a stem which passes through a bearing portion 16 of partition 1' This stem comprises an upper stem portion 17 connected to the valve member 14 and screwed into a lower stem portion 18 which terminates in an enlarged end or head 19. The lower portion 18 slides in a hollow, rod-like extension 20 of the knob 10. The extension 20 has at its upper end an abutment or shoulder 21 co-operating with the head 19. After the sprayer is assembled the lower open end of the extension 20 is preferably closed by a plug 22 composed of plastic or like material.

To ensure perfect fluid-tightness and prevent the liquid from the container leaking along the stem portion 17 and entering the chamber 8, resilient means consisting of a flexible diaphragm 23 which has its periphery applied by the spring 11 against a recessed upper transverse face of the chamber 8 formed by portion 16 of partition 3'. The central part of the diaphragm 23 is gripped between the two stem members 17 and 18. The diaphragm 23 is preferably slightly resilient or elastic and arranged in such manner as to tend to raise the valve 14 off its seat. Bosses 24 are arranged on the periphery of the diaphragrn 23 and form bearing surfaces for the spring 11 so as to prevent the coils of this spring fro'm closing the aperture 7.

In the embodiment shown in Figs. l and 2, the piston of the air pump is constituted by a flexible cup or washer 9 of leather or plastic material, whereas in the embodiment shown in Fig. 3 this cup is replaced and the piston has a skirt formed as a deformable bellows 25 fitting internally of chamber 8 bearing against partition 1. It can readily be seen that the stem portions 17, 18 jointly form a connecting rod which, along with guide means 29, form a lost-motion connection operatively connecting piston 9 and valve member 14.

The sprayer operates in the following manner:

In the inoperative position of the sprayer, the spring 11 urges the knob 10 to a terminal rest position and the extension 20 of the latter acts on the stem portion 18 through the medium of the abutment 21 in a direction so as to' maintain the valve 14 applied against the lip forming the seat around the opening 13. As soon as the knob 10 is manually depressed in the direction toward the seat as shown by an arrow F, air is compressed in chamber 8 or internally of bellows 25 and extension Zt) moves axially along portion 18 so that under the joint effect of the resilience around the lip of the opening 13 and of the diaphragm 23, the valve 14 is lifted ott its seat (see Fig. 2) and permits the liquid from container 1 to flow through the passageway 6 into the chamber 5. The liquid is sprayed out through the orifice o'r nozzle 4, by the air expelled through the aperture 7 by the pump. Upon release of the knob 10 the spring 11 Patented Dec. 22, 1959.

returns the piston to its rest position and as abutment 21 engages head 19 on the outward travel of the piston the valve member is seated. It being understood that the atomizer according to the invention is operated with the container 1 in an inverted position.

It will be observed that should the passageway 6 become blocked, its inclined position permits it to be cleaned by introduction of a pin through the orifice 4.

Although specic embodiments of the invention have been described, many modifications and changes may be made therein without departing from the scope of the invention as `defined in the appended claims.

Having now described my invention what I claim as new and desire to secure by Letters Patent is:

1. A spraying attachment for an atomizer attachable to the mouth of a fluid-filled container comprising, in combination, an elongated, tubular body member releasabl'y attachable with a fluid-tight connection to the mouth of said container, means comprising a partition in said tubular member separating it into an annular first chamber and a separate second chamber axially spaced from the first chamber and having a first passageway providing communication between the chambers, means fixed extending transversely of said body member defining said first chamber jointly with said partition and positionable across the mouth of the container when said body member is attached to the container, said last mentioned means having a valve seat exteriorly of the first chamber provided with an opening for providing communication with the interior of the container, said partition having a second passageway providing communication between the first chamber and the valve seat opening, said tubular member having a discharge orifice providing communication between the atmosphere and the interior of said first chamber, a valve member operable to a seated position on said seat closing said opening and an unseated position allowing fluid iiow from the interior of said container into said first chamber, a manually depressible piston reciprocable in said second chamber for selectively compressing air therein when moved in a direction toward said valve seat, lost-motion connection means disposed interiorly of the second chamber including a valve stem extending through said partition into the second chamber connecting the piston and said valve member and including means to allow displacement of the piston and subsequent unseating of the valve member when the pistn is depressed, first resilient means disposed interiorly of the second chamber constantly urging the valve stem in a direction for unseating the valve member, second resilient means disposed interiorly of the second chamber biasing the piston in a direction away from said valve seat to a rest position in which the piston maintains the valve member seated, whereby when the container is in an inverted position and the piston is manually depressed air is compressed in the second chamber and applied to the first chamber to discharge atomized fiuid under pressure from said first chamber upon unseating of the valve member and upon release of the piston the second resil` ient means returns it to said rest position for closing the valve seat opening.

2. A spraying attachment for an atomizer attachable to the mouth of a fluid-filled container comprising, in combination, an elongated, tubular body member releasably attachable with a fluid-tight connection to the mouth of said container, means comprising a partition in said tubular member separating it into an annular first chamber and a separate second chamber axially spaced from the first chamber and having a first passagewy providing communication between the chambers, means fixed extending transversely of said body member defining said rfirst chamber jointly with said partition and positionable across the mouth of the container when said body member is attached to the container, said last mentioned means having a valve seat exteriorly of the first chamber provided with an opening for providing communication with the interior of said container, said partition havng a second passageway providing communcation between the first chamber and the valve seat opening, said tubular member having a discharge orifice providing communication between the atmosphere and the interior of said first chamber, a valve member operable to a seated position on said seat closing said opening and an unseated position for allowing fiuid fiow from the interior of said container into said first chamber, a manually depressible piston reciprocable in said second chamber for selectively compressing air therein when moved in a direction toward said valve seat, lost-motion connection means disposed interiorly of the second chamber including a valve stem extending through said partition into the second chamber connecting the piston and said valve member including means to allow displacement of the piston and subsequent unseating of the valve member when the piston is depressed, a peripherally anchored resilient diaphragm disposed interiorly of said second chamber and circumferentially fixed to said valve stem providing a fluid-tight seal around said stem and constantly urging the valve stem in a direction for unseating the valve member, second resilient means disposed interiorly of the second chamber biasing the piston in a direction away from said valve seat to a rest position in which the piston maintains the valve member seated, whereby when the container is in an inverted position and the piston is manually depressed air is compressed in the second chamber and applied to the first chamber to discharge atomized fiuid under pressure from said first chamber upon unseating of the valve member and upon release of the piston the second resilient means returns it to said rest position for closing the valve seat opening.

References Cited in the file of this patent UNITED STATES PATENTS 2,651,544 Cuadras Sept. 8, 1953 2,760,822 Boris et al. Aug. 28, 1956 FOREIGN PATENTS 519,798 Canada Dec. 20, 1955