US2242146A - Valve for containers - Google Patents

Description

May 13, 1941. w. L. RUTKowsKl VALVE FOR CONTAINERS Filed Feb. l2, V1940 INVNTOR I /a BY Ziaziz.

ATTORNEY? I Patented May l13, 1941 tiziana VALVE Foa CONTAINERS Walter L. Rutkowsk, Normandy, Mo., assignor to R. C. Can Company, St. Louis, Mo., a corporation of Missouri Application February 12, 1940, Serial No. 318,426

(Cl. iii-14.7)

7 Claims.

My invention relates to combined powder containers and distributors, such as disclosed in applications bearing Serial Numbers 130,826 and 275,960, now Patent Nos. 2,122,230 and 2,215,937 of June 25, 1938, and September 24, 1940, respectively and refers more particularly to a check valve structure for such devices.

In powder containers and distributors designed as a unit for both packaging and spraying insecticides and the like in dry, or powdered form, it is necessary to employ, as a part of the structure,.a'valve equipped plunger element to cause the powder within a container with which the *Y plunger element has telescopic connection, to be emitted in the form of a spray mixed with air under pressure.

To accomplish this in a desired and efficient manner, reciprocating movement of the plunger element allows the entrance of air between the A plunger element and the powder container during the compression stroke of the plunger element, and'will prevent the admission of air between the powder during the opposite stroke of the plunger element, thus emitting powderv in the form of a spray from the device.

It is very desirable that the mixture of powder and air emitted from the device be in the form of a powder spray and that the mixture be of uniform consistency for effective distribution to places to be sprayed with the powder.

Therefore, one of the objects of my present invention is the provision of a check valve structure formed at the lower, or inner end of that part of the device packaging the powder to be sprayed without transfer to an independent spray-gun.

Another object of the invention is a check.-

valve structure of the character described hereinafter, which controls the admittance of air, under pressure, into a check valve chamber for distribution to a powder chamber and an aper.

Referring to the drawing:

Fig. 1 is an enlarged vertical sectional view of the device embodying the features of my invention, the valve being shown in closed position.

Fig. 2 is a fragmentary view similar to Fig. 1, showing the valve in open position to provide an annular air inlet through the bottom head of the valve casing,

Fig. 3 is a View, reduced in size, taken on line 3-3 of Fig. 1.

Fig. 4 is a view, reduced in size, taken on line 4 4 of Fig. 2, showing the upper valve casing head and the valve partly broken away and showing thel valve in open position providing thereby an annular air inlet through the bottom valve casing head.

Fig. 5 is a view partly in side elevation and partly in vertical section of a powder container and distributor includingy the device embodying the features of my invention.

- The powder container proper shown in Fig. 5, comprises a tubular fibrous body member I provided with a powder storage chamber I. A second tubular fibrous member designated 2, which is mounted on the tubular member l and'adhesively secured thereto, is provided with a sheet metal top closure head 3 provided with an air and powder discharge opening 4.

The reference character 5 designates a tubular fibrous plunger member having telescopic connection with the tubular fibrous body member I, and the member 5 is provided at its inner end with a sheet metal closure head 6 having a pair of air inlets 'I closed and opened by means of a pair of suitable flap valves 8 formed by the end portions of a iibrous strip 9 anchored midway its ends to the head 6 by means'of fastening prongs I0 formed from the head material. The plunger member 5 is telescopically connected with the powder container body I for reciprocating movement thereon so as to serve as a plunger element to force air, under pressure, into the device for mixture with powder carried in the container body I and to be emitted in the form of a powder spray, after final' mixture in an apertured discharge tube I I in communication at one end with the discharge opening 4 in the top head closure 3.

In carrying out the present invention, namely, the check valve structure, the lower, or inner end portion of the tubular member I serves as the side wall of the valve casing and is designated I2. The inner end of the tubular member I is provided with a sheet metal outer head designated, generally, as I3 having a central valve opening I4. Spaced inwardly from the container head I3 is an inner flexibly resilient auxiliary head I5. The iiexibly resilient head I5 is shown as provided with a series of air inlet openings I6, leading to the powder chamber I', although these openings may be eliminated, if so desired. The auxiliary head I5 is provided with an opening I I whether the head is provided with air inlet openings I6,` or not. The discharge tube I I, which is provided with side wall apertures or openings I8 for the admission of powder, or powder and air thereintc from the powder chamber I' in the container body I, is projected through the opening II in the flexibly resilient iibrous inner head I5 and rests upon sheet metal closure head I3 adjacent the edge of the central valve opening I4 therein, and the lower edge of the tube is spaced from the remainderI of the head due to the head being formed with a suitable annular air channel I 9 and at annular body portion IS surrounding the opening, and which channel serves to admit air from the air distributing chamber 2l] formed within the side wall I 2 and the heads I3 and I5 forming the valve casing, into the discharge tube II from the lower or inner end thereof.

A suitable sheet metal check valve designated, generally as 2|, is designed to open and close the central opening in the valve casing head I3. The valve 2l is in the form of an inverted frusto-conical member having a closed lower end 22 with its upper, or opposite end open. An outstanding flange 23 terminates from the upper end of the wall at the upper open end of the valve member 2l, and the flange 23 is seated against the iiexibly resilient inner, or auxiliary Valve casing head I5l with the narrow, or lower end projecting through the central opening I4 in the outer sheet metal valve casing head I3. The valve 2| keepsthe central opening I4 in the head I3 normally closed. Upon reciprocating the plunger member 5, movement thereof in one direction compresses air taken therein and forces it under pressure against the valve ZI', causing the inner flexibly resilient head I5 to yield inwardly, thereby allowing sufficient movement of the valve 2I inwardly to provide an annular air inlet opening 24between the valve member 2I and the edge 25 of the central valve opening I 4 in the valve casing head I3 to admit air, under pressure, into the air'distributing chamber 25 within the valve casing to be distributed from there'thr'ough'the opening I'I in the flexibly resilient fibrous valve casing head I5, and into the powder chamber I of the tubular member I, and from there with powder into the apertured discharge tube II. At the same time air is distributed by way of the valve casing head channel I9 into the discharge tube II through the open lower end thereof for iinal mixture therein with the powderand air admitted into the apertured discharge tube II from the powder chamber to be emitted in the form of a powder spray through the discharge opening I! in the head When the inlet openings I6 in the flexibly resilient valve casing head I5 are omitted, the air, under pressure, follows the course described to and through the discharge tube Ii, mixing with powder sifting through the discharge tube openings I8 from the powder chamber I- of the tubular member I.

Movement of the plunger member 5 opposite to the compression stroke thereof, releases pressure against the valve 2I and the flexibly resilient head I5, and the head I5, in returning to normal moves the valve 2I into position Luider suiiicient pressure to close the central opening I4 in the valve casing head I3, thereby closing the annular air inlet 24 formed when the valve 2I is moved, under air pressure, relative to the central valve opening I4.

In a check valve of this character, it is, from a commercial aspect, necessary to produce a device Which may be manufactured at a low cost, as it is ordinarily used for only the period of time necessary to discharge the powder contents of the insecticide package, and yet it must be efcient in its purpose to admit air into a powder container body and a discharge tube.

The many advantages of the herein described invention will readily suggest themselves to those skilled in the art to which it appertains.

Various changes and alternative arrangements without aiecting the device, may be made Within the scope of the appended claims, in which it is my intention to claim all novelty in the invention as broadly as the prior art permits.

What I claim is:

1. A check valve comprising a casing including the side wall of a powder container, a closure head for one end thereof and an auxiliary head of flexibly resilient material spaced from the closure head to form an air distributing chamber therebetween, said closure head having a central opening therein, the closure head being deformed to provide an annular channel concentric with the central opening, an inverted frusto-conical shaped valve projecting through said central opening, said valve being closed at its smaller end and open at its wider end and with the side wall of the valve normally engaging the edge of the central opening, an outstanding flange'at the open end vof the valve seated against the' auxiliary head, said valve adapted to be moved, by means of air pressure, against the auxiliary head' to provide an annular air inlet to the air distributing chamber, said auxiliary head having an opening therein, and a discharge tube projecting through said last mentioned opening and seated on the closure head adjacent the central opening so as to overlie the annular channel.

2. A device as dened in claim 1, including a series of perforations formed in the auxiliary head in circular arrangement opposite the said annular channel.

3. A check valve comprising a casing including the side wall of a container body, a sheet metal head secured to one end of the body, an

auxiliary inner head formed of flexibly resilient fibrous material spaced from the sheet metal head to provide an air distributing chamber therebetween, said sheet metal head having a central opening therein and deformed to provide an annular channel concentric with the central opening, a cup-shaped sheet metal valve projecting through said central opening, an outstanding flange formed at the open end of said valve seat against the ilexibly resilient inner auxiliary head to retain the valve in its normally closed position, and said valve adapted to be moved in the direction of the auxiliary head, under air pressure, to provide an annular air inlet leading to the air distributing chamber, and a discharge tube projecting through the opening in the auxiliary head and seated upon the sheet metal head adjacent the central opening therein so as to overlie the annular channel formed on the sheet metal head.

4. A device as defined in claim 2, including a series of perforations formed in the auxiliary head.

5.'A valve of the class described comprising a portion of the side Wall of a container body, a sheet metal head secured to one end of the body having a central opening, an auxiliary head of flexibly resilient fibrous material having a circular series of perforations spaced from the sheet metal head to provide an air distributing chamber between said heads, ya hollow valve member having a tapered side Wall, an outer closed end, and an open inner end projecting at its narrow end through said central opening to normally close the central opening, an outstanding fiange at the open end of the valve member seated against the auxiliary head to cause the auxiliary head to yield in the direction of air pressure directed against the projecting end of the valve member to provide an annular air inlet between the valve member and the edge of the central opening communicating. with the air distributing chamber, and said flexibly resilient auxiliary head adapted to exert pressure against the flange on the valve member to cause the valve member to close the annular air inlet when airl pressure has been released .against said auxiliary head, and the auxiliary head having an air outlet.

6. A device as dened in claim 5, including an annular channel formed by deforming the sheet metal head concentric with the central opening therethrough, and a discharge tube projecting through the air outlet adapted to rest upon the sheet metal head adjacent the central opening and to overle the annular channel.

'7. A check valve having a casing comprising a body formed with a pair of spaced heads to provide an air chamber therebetween, one of the heads having a series of air perforations, a -central opening formed in the vother head, a normally closed valve member projecting through the central opening and seated against the head having the air perforations, said valve and .the head having the air perforations being movable, under Iair pressure, to open the valve relative to the opening in the said other head to provide an annular air inlet opening leading to the air chamber, the perforated head being formed of flexibly resilient brous material to move the valve to closed position when air pressure is released thereagainst, and an air outlet leading from the air chamber through the flexibly resilient fibrous head.

WALTER L. RUTKOWSKI.

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