US 3433393 A
Description (OCR text may contain errors)
March 18, 1969 v. P. M. BALLU 3,433,393
ATOMIZING OR SPRAYING APPARATUS Filed Aug. ll, 1967 United States Patent M 3,433,393 ATOMIZING OR SPRAYING APPARATUS Vincent P. M. Ballu, Epernay, France, assignor to Tecnoma, Epernay, Marne, France, a company of France Filed Aug. 11, 1967, Ser. No. 660,092 Claims priority, application France, Aug. 30, 1966, 7 7
us. (:1. 222-402 1m. (:1. B0511 9/04 4 Claims ABSTRACT OF THE DISCLOSURE This invention relates to atomizing or spraying apparatus into which liquid to be atomized is placed under pressure by means of a hand pump associated with the apparatus and is emitted from the apparatus by said pressure.
According to the invention, a spraying or atomizing apparatus comprises a liquid reservoir provided with an air pump extending through the reservoir to engage opposed walls thereof and provide a tension bracing member for said walls thus diminishing the stresses to which the said walls are subjected under the influence of the pressure within the reservoir.
Furthermore, advantageously, the securing of the pump is effected in such manner that when the said pump is dismantled from the reservoir any pressure air which may remain in the reservoir can escape before the body of the pump is freed from the reservoir.
The description which follows hereinbelow, with reference to the accompanying drawing which is given purely by way of nonlimitative example, will show how the invention may be carried into effect.
In the drawing:
FIGURE 1 is a view in longitudinal section of an atomizing or spraying apparatus according to the invention, and
FIGURES 2 and 3 are magnified sections, along the lines IIII and III-III respectively of FIGURE 1, showing details of that apparatus.
In the embodiment shown in the drawing, the atomizing apparatus comprises a reservoir 1, which is made for example from welded and crimped stainless sheet steel, and the terminal walls 2 and 3 of which are concave. The upper wall 2 is formed with a large central aperture 4 having a turned-down edge towards which the surrounding region of the said wall slopes gently, in such manner as i to constitute a funnel serving for the filling of the reservoir.
Towards one side, the wall 2 is also formed with an aperture 5 serving for the fitting of a connecting member 6 from which extends, internally, a dip-tube 7 to a point near the bottom wall 3 of the reservoir and, externally, a tube 8 to which there may be connected a flexible tube serving for dispensing the product to be atomized.
Engaged in the aperture 4 is the pressurizing air pump of the atomizing apparatus, which comprises a cylindrical casing 9 to the upper end of which is secured, (for example by injection molding) a head 10. The head 10 has a skirt 11 the diameter of which is smaller than that 3,433,393 Patented Mar. 18, 1969 of the aperture 4 in which it is to be engaged. The skirt 11 has longitudinal centering ribs 12. It is joined by a shallow groove 13 (intended to receive a fluid-tight packing 14) with a collar 15 which, when the pump is fully inserted in the reservoir, bears against the wall 2 (FIG- URE 1).
Formed in the end face of the head are air passage apertures 16 and also a bore 17 through which extends rod 18 of the pump piston 19.
The rod 18 is provided with a hollow handle 20, part of which is shown in section in FIGURE 3 and which has under its lower face a hook 21 of sector-shape which is adapted to be engaged under a retaining bead 22, provided on the head 10, from either end of the bead, for the purpose of locking the handle on the head when the pump is not in use. Disposed in the center of the bead 22 is a projection 23 which forms an end stop for the sector hook. When it is desired to utilise the pump, the handle is turned in the required direction to disengage the sector hook from the bead.
At its lower portion (the edge of which is slightly flared) the cylindrical casing 9 of the pump contains an end piece 24 which is maintained in place by one or more lateral screws 25 and the fluid-tightness of which is provided by means of a peripheral packing 26 lodged in a groove 27 formed in the said end piece.
The end piece 24 is hollow and its upper end face 28 is formed with apertures 29 under which is provided a small conical valve 30, which is centrally held by means of a mushroom pin 31 in a small central aperture in the end face.
The said valve uncovers and blocks the aperatures 29 in accordance with the functioning rhythm of the pump.
In FIGURE 1, in the conventional manner, the valve portion to the left of the pin 31 has been shown open and that to the right of the pin has been shown closed. Internally, the end piece 24 is tapped and engages a screwthreaded base member 32 to which it is screwed in such manner as to leave the valve 30* sufiicient space for its displacement. The base member 32 is furthermore formed 'with conduits 33 the purpose of which is to allow the passage of the air delivered by the pump to the main interior space of the reservoir, the conduits opening below the end piece 24 which does not reach the bottom wall 3 of the reservoir.
The base member 32 bears on the bottom 3 through a sealing ring 34. It is fast with a scre wthreaded securing pin 35 extending through the bottom wall 3 and receiving a hearing or support washer 36 and a nut 37 lodged in the outer hollow of the bottom wall.
The pump piston is provided with a dished packing 38, the inner periphery of which is engaged in a groove 39 formed in the rod 18.
The mode of'functioning of the pump is the same as in conventional reciprocating Ipurnps of this type.
In order to fill the reservoir, the pump is dismantled, by turning the handle 20 so that it bears on the stop 23 and rotates the head 10 with the casing 9, so that the end piece 24 is unscrewed fromthe base member 32 which remains fixed to the bottom of the reservoir by means of its nut 37. The pump is displaced upwards during this unscrewing operation and, as soon as the packing 14 of the head moves out of contact with the wall 2, pressure air in the reservoir can escape between the head and the edge of the aperature 4 due to the shaping (designed for this purpose) of the skirt 11 and of the ribs 12. Thus, pressure equilibrium is established with the exterior before the pump becomes detached from the bottom of the reservoir, and in this way uncontrolled displacement of the pump by air pressure in the reservoir is avoided.
It is self-evident that modifications may be made in 3 the embodiment just described, notably by substituting equivalent technical means, without thereby exceeding the scope of the present invention as defined in the appended claims.
What I claim and desire to secure by Letters Patent is:
1. A spraying or atomizing apparatus comprising, in combination, a liquid reservoir, an air pump, a body of said pump extending through said reservoir, opposed end walls of the reservoir having engagement means rtor mutually spaced parts of said pump body whereby the body provides a tension bracing member for said walls, a head at one end of said pump body being arranged to engage one of said reservoir walls by abutment with the external face thereof, a skirt extending from the head towards the other of said reservoir walls, an aperture in said one wall receiving said skirt, said skirt and aperture defining between them a fluid passage space and a packing ring on the head being provided to seal against said one wall to seal the exit from said space, said head being displaceable for disengagement of the packing ring to permit the escape of pressure fluid from the reservoir through said passage space.
2. Apparatus according to claim '1 further characterized on that said engagement means securing the head to the reservoir are arranged to remain in engagement with the head during the initial displacement of the packing ring opening said passage space to the exterior.
3. Apparatus according to claim '1 wherein an aperture in one of said opposed walls receives the pump body, a connecting arrangement fixed to the other opposed wall being engageable with an end of the body inserted through said aperture to secure the body in the reservoir, a valve of said pump and passages communicating between one side of said valve and the reservoir main interior space being carried by said connecting arrangement.
4. Apparatus according to claim 3 wherein an element of said connecting arrangement is tfixed to the reservoir end wall opposite said apertured wall and a screwthreaded engagement is provided between said element and the pump body whereby the body may be removed from the reservoir.
References Cited UNITED STATES PATENTS 644,971 3/ 1900 Dull 222-401 775,065 11/ 1904 Lawless 222-401 1,228,746 6/ 1917 Charles 222-402 1,461,5 46 7/ 1923 Robertson 222-402 X 1,528,021 5/ 1925 Brandt 222-402 1,878,472 9/ 1932 Dodelin 222-402 X FOREIGN PATENTS 263,679 3/ 1929 Italy.
ROBERT B. REEVES, Primary Examiner.