US2437589A

US2437589A - Telescoping dispensing nozzle with fluid pressure-operated safety valve

Info

Publication number: US2437589A
Application number: US589744A
Authority: US
Inventors: Arthur R Bink
Original assignee: Individual
Current assignee: Individual
Priority date: 1945-04-23
Filing date: 1945-04-23
Publication date: 1948-03-09
Anticipated expiration: 1965-03-09

Description

A. R. BINK arch 9, 1948.

TELESCOPING DIS?ENSING NOZZLE WITH FLUID PRESSURE-OPERATED SAFETY VALVE Filed April 25, 1945 Patented Mar. 9, 1948 UNITED '.ITELESCOPING DISPEN SING NOZZLE WITH FLUID PRESSURE-OPERATED VSAli'l'llY VALVE Arthur R. Bink, Westfield, N. J,-

Application April 23, 1945, Serial No. 589,744

7 claims, (c1. zzz- 453) The present invention-relates to uid dispensing nozzles and particularly to nozzles Yof the type primarily intended to be used in association with small dispensing cans such as may be held in the hand and conveniently moved about for the purpose of applying one or more drops of uid at any selected point.

Dispensing nozzles of this general type have heretofore been widely employed and, where the iiuid to be dispensed is oil or the like the design of a satisfactorynozzle presents no diiiculty. In certain instances, however, it is necessary to package liquids of volatile or explosive nature in the conventional small dispensing can adapted for hand manipulation and it is highly desirable to provide in association with a can which is designed and intended for use in dispensing liquids of explosive nature a dispensing nozzle which may not only be manipulated manually so as to permit the discharge of measured quantities of liquid fromtime to time as needed, but will also serve as a safety device having the capacity to automatically act when the internal pressure exceeds a predetermined minimum, to vent the can by permitting the discharge into the atmosphere of vapors which, if confined, would cause the building up of excessive pressures, suicient to cause disruption of the container Wall unless relieved.` The ability to readily permit escape of vapor from the can with which it is associated, when the vapor pressure exceeds a predetermined minimum, is a characteristic of the present dispensing nozzle and when it is used the danger of explosion due to excessive internal pressure is wholly eliminated, it being impossible for the improved nozzle to fail to function in this respect.

Y The nozzle which comprises the subject matter of the present application is one of great simplicity, comprising four operating parts only and these being of simple nature, readily fabricated and readily assembled. It is also constructed so as to be operable manually with the greatest ease. The liquid discharge port of the nozzle is at its extreme end so that the user m-ay precisely direct the outflowing liquid onto a chosen area. The

nozzle may be operated by pressure applied manually at any one of a number of different places, the control valve being unseated when the nozzle end is pressed against a part to which liquid is to be applied or unseated when linger pressure is applied at any point along the circumference of an annular flange -which forms part of the movable member of the nozzle and which is particularly designed to be engaged and manipulated by the fingers of the operator.

One embodimentof the invention will be disclosed by way of example but it will be understood that such embodiment, which is'illustrated in the accompanying drawings, may be considerably modiiied without departure from the invention in adapting the nozzle to containers of different types and for the handling of uids having different characteristics.

In the drawings: i v

Figure 1 is an illustration, in perspective, of a container to which the nozzle has been applied, the container being tilted to liquid discharging position and a iinger of the operator being shown to be in contact with the movable or control portion of the nozzle; and

Figures 2, 3 and 4 are axial sections through the improved nozzle showing the operating parts in the positions which they occupy when the nozzle is in normal or closed position; after 'it has of fluid from the can. The telescoping tubular` been opened in the normal manner by externally applied pressure; and after it has been opened as a result of excessive internal pressure, respectively.

The wall of a container, 'which may be a Asmall metal can, is indicated at III and it will be under-- stood that the container with which the improved nozzle is associated may be of any size or shape. The nozzle includes four principal elements, the forwardly and rearwardly disposed telescoping tubular members Il and I2, respectively, comprising the nozzle proper the valve iand valve stem assembly generally indicated at I3, and the helical compression spring indicated at I4. The tubular member comprising the forwardly positioned orificed discharge member II and the rearward socket member I2 are coaxial and the cylindrical outer surface of'the member Il, at one end of such member, makes a close sliding fit with the cylindrical inner surface of the member I2. The member I2 is in eiect a nipple and is adapted to be attached to the can IIJ. In the drawings it will be observed that a reduced annular end portion 12aA of the member l2 is exteriorly threaded so as tohave threaded engagement with the* internally threaded neck of the can I0. The member II is provided with an annular iiange IIa, that surface of the flange which' faces away from the container I0 being adapted to be engaged by the-fingertips when the nozzle is to be operated to permit the discharge sible relative axial movements of these members.

Thus the member I2 is provided at its outer end with a radially extending peripheral flange l2b and the member II is provided with a cylindrical flange IIb the lower cylindrical edge of which is inwardly turned or upset so as to underlie the flange l2b. Tl .e peripheral flange I2b of the member I2 thus acts as a stop preventing movement of the 4member I I relatively to the member in excess of a predetermined distance. A

The valve and valve stem assembly I 3 includes the disc valve lia andthe stem portion rigid therewith, the stem portion including the relatively lengthy stem proper I3b and the terminaly flange I3c, the terminal flange being apertured at several points, as for instanceat i3d, to per-V mit the passage of liquid at all times from the interior of the can outwardly intothe nozzle as far as the valve member Ila. The inner end of the helical spring I4 rests against the outer face of the terminal flange I3c of the valve and stem assembly and its outerend contacts with the inner face of the annular internal flange llc of the movable -member II f the nozzle.

Normally the various parts oi' the nozzle occupy the positions in which they are illustrated in Figure 2, the spring Il acting to force the valve stem assembly flange. I3c inwardly upon the outwardly facing surface of the' internal shoulder I2c of the tubular member I2, and also urging the member I I outwardly so that the members I Ic thereof contact with the peripheral flange I2b of the outer'member. 'Ihe dimensions of the several parts are such that, when the member Il has been projected axially to the limit of its movement away from the can I0 the outer surface of its internal annular flange I'ic is in liquid-tight engagement with the inner or undersurface of valve disc I3a, the outer surface of the annular part IIc thus comprising a valve seat for the valve I3a, When the valve is thu's seated the valve assembly disc I3c may be spaced very slightly away from shoulder I2c.

With the parts so positioned there can b no which has been selected for disclure by way of example.

The terms "forward and rearward" and their derivatives, as applied to themembers II and I2,

when used in the specification and claims, have reference to the relative positions of the members axially of the device in the direction of discharge of the fluid.

Having thus described the invention, what is claimed as new and desired to be secured by Letters Patent is:

l. A fluid dispensing nozzle comprising, incombination, telescoping forward and rearward tubular members relatively movable axially and hav- 'ing mutually cooperating portions which limit to a predetermined distance the relative axial movements ci said members, the forward member having a valve seat facing the discharge end of that member and the rearward member having a stop surface facing in the same direction, a valve and stem assembly disposed axially of the said members and movable independently of said telescoping members, |and a spring acting on the forward member and valve stem assembly to seat the valve escape of liquid due to inversion of the can.

Valve opening may be brought ahout'in either of two ways, i. e., by manually pressing the member il axially toward the can to the position in which it is shown in Figure 3 of the drawings, the valve I3a being thereby unseated and an annular passage for the flow of fluid around the valve stem lbestablished. The valve will remain open so long as pressure is applied to .the

member I I... When the pressure is relieved the I spring immediately acts to thrust the member li outwardly and to interrupt the flow of liquid.

Excessive pressure within the container may. likewise open the valve since an annular area of the undersurface of the valve part |3a, closely i encircling the stem part I3b, will always be exposed tothe action of fluid pressure -within the container. When the pressure becomes sufficiently great to overcome the action of the spring it the valve will open, moving to or toward the position in which it is shown in Figure 4, enabling .a portion `of the volatilized liquid to escape. The strength of the spring Il will be such as t0 permit opening of the valve automatically in this manner long before the container wall becomes overstressed and hence the improvedfdispensing nozzle acts as a. safety valve which under no circumstances can fail in its explosion preventing functions. Naturally the various elements of thev invention may be designed so as to have different shapes in order to meet different conditions and the invention is not limited to that precise form on the valve seat and the stem on the stop surface f of the rearward member, the forward member being at the forward limit of its travel when the valve and vstem are'seated, the parts being so constructed-and arranged that unseating of' the valve results when the forward tubular member is thrust rearwardly or the pressure of fluid behind the valve overcomes the action of the spring.

2. A fluid dispensing nozzle comprising, in combination, telescoping forward and rearward tubular members together comprising an open-ended duct for liquid, said members having mutually cooperating portions which limit to a predeter.

mined distance their relative axial movements, the forward member having a valve seating surface and the rearward member a valve stem seating surface, both such surfaces facing toward the same end of the duct, a valve and stem assembly disposed axially of the said members, a spring 'having its ends engaging the forward member and-valve stem assembly, said spring normally urging the valve'and seat into liquid-tight engagement upon said seating surface and the valve stem against the valve stem seating surface, the forward member being at the forward limit of its travel when the valve and stem are seated, the parts being so constructed and arranged that unseating of t-he valve results when the forward tubular member is thrust axially of thel rearward member or when the pressure of fluid behind the valve overcomes-the action of the spring.

3. The combination set forth in claim 2 in which the valve and stem assembly includes a terminal disc mounted on the stem remote from the valve, said disc being perforated to permit ci) the passage of gas and liquid at all times.

4. A fluid dispensing nozzle comprising telescoping tubular members together comprising an axially extensible and contractible duct, and

`means associated with the duct for'normally maintaining the duct closed, said means being movable to open the duct at all times both by axial contraction of the duct and also by the pressure Aci fluid at the inlet end of theduct whenever it exceeds a predetermined minimum whether the duct is contracted or not.

5. A dispensing container for volatile liquids or the like, having walls, one of which has an opening provided with a tubular nipple member, a forwardly disposed tubular discharge member disposed for limited telescoping movement with respect to said nipple member and retractable rearwardly towards said container, a valve element movable at all times independently of said nipple member and said discharge member and openable forwardly from e. seat on said discharge member, retractive movement of said discharge member serving to move said seat rearwardly relatively to said valve and unseat the same for dispensing, and movement of said valve itself forwardly with respect to said seat on the discharge member, under pressure of the fluid co'ntents of the container, serving to vent the container whatever the position of the telescoping members as a safety measure.

6. A dispensing container for volatile liquids or the like, having relatively rigid non-collapsible walls, one of which has an opening provided with a tubular nipple member, a forwardly disposed tubular discharge member disposed for limited telescoping movement with respect to said nipple member and retractable rearwardly toward said container against spring pressure, a valve element movable at all times independently of said nipple member and said discharge member and openable forwardly from a seat on said discharge member also against spring pressure, means bracing said valve element against said nipple member whereby rearwardly retractive movement of said discharge member serves to move said seat rearwardly relatively to said valve and unseat the same for dispensing, and the movement of said valve itself forwardly with respect to said seat under pressure of the volatile contents of the container, serves to vent the container whatever the position of the telescoping members as a safety measure.

7. A dispensing container for volatile liquids,

6 tubular discharge member disposed for limited telescoping movement with respect to said nipple member and retractable rearwardly toward said container against spring pressure, a valve element movable at all times independently of said nipple member and said discharge member and openable forwardly from a seat on said discharge member also against spring pressure, means bracing said valve element against said nipple member whereby rearward retractive movement ofA said discharge member serves to move said seat rear-l wardly relatively to said valve and unseat the same for dispensing, and the movement of said valve itself forwardly with respect to said seat under pressure of the volatile' contents of the container, serves to vent the container Whatever-the position of the telescoping members as 9, safety measure,V a single spring compressed between a portion of said forward tubular discharge member and a portion of said valve bracing means,

whereby said spring performs the dual function y i of resiliently resisting the retraction of the disi charge member to unseat the valve for dispensing or the like, having relatively rigid non-collapsible walls, one of which has an opening provided with purposesand resiliently resisting the forward unseating of the valve element itself under internal fluid pressure.

' ARTHUR R. BINK.

REFERENCES CITED The following references are of record in the .ille of this patent:

UNITED sra'rns PATENTS Number Name Date 529,221 Wagner Nov. 13, 1894 1,451,899 `Coogan Apr. 17, 1923 1,928,895 JensenA Oct. 3, 19,33 2,183,912 Isler Dec. 19, 1939 2,215,491 Ziegler Septt 24. 1940