US2781956A

US2781956A - Non-drip calking gun nozzle

Info

Publication number: US2781956A
Application number: US506903A
Authority: US
Inventors: William A Sherbondy
Original assignee: Individual
Current assignee: Individual
Priority date: 1955-05-09
Filing date: 1955-05-09
Publication date: 1957-02-19
Anticipated expiration: 1974-02-19

Description

1957 w. A. SHERBONDY NON-DRIP CALKING cum NOZZLE,

Filed May 9, 1955 INVENTOR.

W/LL/AM A. SHEQBONDY Ma i/n v {mm/L A 7'7UENEYS United States Patent NON-DRIP CALKING GUN NOZZLE William A. Sherbondy, Cleveland, Ohio Application May 9, 1955, Serial No. 506,903

6 Claims. (Cl. 222491) The present invention relates generally as indicated to a non-drip calking gun nozzle, and more particularly to a nozzle assembly which may be operated just before the calking gun is set aside after use to prevent oozing or dripping of the calking compound as it gradually expands upon release of pressure.

The present invention is also concerned with, but not limited to, improvements in a plastic material-containing cartridge which is adapted to be installed in a holder or calking gun, said gun being operative to dispense the contents of the cartridge through a discharge spout or nozzle at one end of the latter or at one end of the gun.

As is well known, calking compounds and other similar plastic materials are compressible to some degree when forced under pressure from a cartridge or receptacle therefor, and, as a result, when the calking gun is laid aside after use, the compressed material slowly expands and thus oozes or drips from the end of the spout.

At the present time, calking compounds are marketed, to large extent, in the form of scaled cylindrical cartridges having a closure member at one end which constitutes a piston adapted to be moved in the cylinder body or receptacle of the cartridge to discharge the plastic material under pressure through a spout at the other end. Often, the spout end of the cartridge has a frangible sealing disc or the like thereacross which is punctured as by a nail or other pointed implement or solely by the pressure exerted on the material.

In some instances, the spout is a part of the calking gun proper in which the cartridge is inserted, and usually the gun is provided with an operating lever or trigger which operates a ratchet feed mechanism for incrementally forcing the head of a ratchet bar into engagement with the aforesaid piston of the cartridge.

It is one object of this invention to provide a novel form of dispensing nozzle for calking guns or for calking gun cartridges which eliminates such problem of oozing of the calking compound when the use of the calking gun is discontinued.

Another object of this invention is to provide a valved spout or nozzle having a valve which is opened under the influence of the pressure of the calking material and which is adapted to be closed by actuation of the spout.

Another object of this invention is to provide a simple form of valved spout assembly in which the valve element is an integral part of the assembly, and said valve element is operated by the flexing of the spout either by finger or by means of a suitable mechanism on the gun or cartridge holder.

Other objects and advantages of the present invention will become apparent as the fol-lowing description proceeds.

To the accomplishment of the foregoing and related ends, the invention, then, comprises the features hereinafter fully described and particularly pointed out in the claims, the following description and the annexed drawing setting forth in detail a certain illustrative embodiment of the invention, this being indicative, however, of

but one of a few of the various ways in which the principle of the invention may be employed.

In said annexed drawing:

Fig. l is a fragmentary longitudinal cross-section view of the spout and of a calking gun cartridge and its holder, the cartridge being provided with a non-drip nozzle;

Fig. 2 is a transverse cross-section view taken substantially along the line 2-2, Fig. 1;

Fig. 3 is a cross-section view showing how the spout is adapted to be flexed to operate the valve to closed position; and

Fig. 4 is a fragmentary side elevation view of a cartridge holder provided with a mechanism which may be operated to axially retract the spout of the cartridge rather than tilting the same as in Fig. 3.

Referring now more particularly to the drawing, the calking gun cartridge herein comprises a cylindrical receptacle 1 made of any desired material, that is, metal, plastic, or the like, but preferably of paper or cardboard which has an inner lining impervious to the oils in the calking compound. Essentially, the cylindrical receptacle 1 may comprise a length of mailing tube which has an internal plastic film or layer which prevents penetration of the calking compound and also prevents access of air to the calking material therein.

One end of the receptacle 1 is closed by a close fitting metal stamping 2 which, as hereinafter explained, constitutes a piston or plunger, movable longitudinally in the receptacle to discharge the calking compound from the other end.

The other end of the cylindrical receptacle is equipped with a dispensing spout or nozzle assembly which includes complementary, interfitting

metal stampings

3 and 4 provided with radially spaced axial flanges between which the end of the receptacle 1 is gripped by crimping or rolling over the outer axial flange of ring 4, and further provided with axially spaced radial flanges between which the flexible flange 5 of a plastic spout 6 is securely gripped.

The central portion of the stamping 3 and said flexible flange 5 are formed so as to define a chamber 7, and the former is sheared along the part-circular line 8 to provide a hinged valve 9 which is an integral part of the stamping 3. I

The inner surface of the closure member 3 may have applied thereto sealing film of varnish, lacquer, or the like, or a separate paper disc adhered thereto.

The flange S terminates in a central tubular spout 6 which preferably is cut on a bias as shown at its front end and which is provided with an annular rib 10 at its rear end axially spaced from the valve element 9.

Said annular rib 10 is preferably of smaller diameter than the valve 9 so as to be effective to move said valve from its open position as shown in dotted lines in Fig. l, to closed position of Figs. 1 and 3 when the spout 6 is tilted as shown in Fig. 3.

The holder 12 for the cartridge 1 is exemplarily shown herein as comprising a flanged ring 14 secured at one end of a saddle or cartridge support 15. At the other end of said saddle 15 is secured the customary gun handle (not shown) to which a trigger is pivotally connected. When the trigger is actuated, a ratchet mechanism in the gun incrementally advances the ratchet bar 16 and its head 17 toward the left.

When it is desired to load a cartridge 1 into the gun 12, the ratchet bar 16 with its head 17 may be withdrawn to the right to allow insertion of the cartridge spout 6 through the opening in ring 14 and positioning of the cartridge in the saddle 15. As evident, when the bar 16 and head 17 is incrementally advanced to the left, the head 17 will engage plunger 2, and as the pressure on the calking compound in the receptacle 1 builds up, the seal around valve 9 will be broken thereby and the valve 3 9 will be swung to the Fig. 1 dotted position, whereupon the calking material may flow around said valve 9, through the chamber 7, and out through the end of the spout 6.

When it is desired to set the gun aside, or when the use of the gun is discontinued, all that the operator has to do is to tilt the spout 6, as with his thumb for example, as is shown in Fig. 3. The rib 10 engages the valve 9 and forces the same to closed position. It is to be noted that, when the spout 6 is flexed as in Fig. 3, the volume of the chamber 7 between the spout flange and the member 3 is much less than it is in the normal operating position.

Therefore, the tilting of the spout 6 and flexing of flange 5 displaces calking material from the chamber 7, whereupon, when the thumb pressure is released and the spout 6 assumes its normal position, a void will be created in such chamber 7.

Moreover, since the valve 9 is now in closed position, it will effectively hold any slight pressure remaining on the material in the cartridge receptacle 1. However, even if the material in the receptacle 1 should gradually leak through the valve 9, such leaking material will be effective to first fill the void in the chamber 7; and, therefore, will not cause oozing or dripping from the end of the nozzle or spout 6.

Instead of tilting the spout 6, the closing action on the valve 9 may be effected as by means of the valveactuating mechanism shown in Fig. 4 wherein the spout 6 will be axially withdrawn toward the handle of the gun to press the valve 9 to closed condition. And, as fully disclosed in my copending applications Serial Nos. 451,755 and 471,207, filed August 24 and November 26, 1954, respectively, the spout 6 may be held in this retracted position during the periods of non-use of the gun, whereupon the valve 9 is positively held in its passageclosing position.

The mechanism shown in Fig. 4 comprises a plate 20 hinged to the end ring 21 of the gun and provided with cars 23 adapted to engage the inner portion of flange 5 when plate 20 is swung by retraction of rod 24.

With respect to the tilting of the spout 6, it is to be noted that, because the rib is of smaller diameter than the valve 9, it will press against the valve at a point spaced from the hinge regardless of the direction of tilting of the spout 6. Likewise, because the hinge is of substantial length between the ends of the shear line, pressure applied by rib 10 at any point of the valve 9 will cause a closing of the same without twisting.

Other modes of applying the principles of the invention may be employed, change being made as regards the de tails described, provided the features stated in any of 4 the following claims, or the equivalent of such, be employed.

I therefore particularly point out and distinctly claim as my invention:

1. In a dispensing device for plastic material, the combination of a receptacle for plastic material provided with a central opening at one end thereof, a hinged valve member for opening and closing such opening, and a tubular dispensing spout having a flexible, radially outwardly extending flange which is peripherally secured at such receptacle end to form a chamber therewith,, said valve member being swung into such chamber under the influence of pressure on the material in said receptacle for flow through said spout, said flange being laterally flexible for flexing toward such receptacle end to displace through said spout some of the material in such chamber and to engage and move said valve member to a position closing such opening.

2. The device of claim 1 wherein said flange terminates in an annular rib which engages and moves said valve member as aforesaid.

3. The device of claim 1 wherein said flange is thus flexed by tilting said spout.

4. In a non-drip calking gun nozzle, the combination of a sheet metal disc integrally formed with a hinged valve member for opening and closing a central opening in said disc; and a tubular spout having a flexible, radially outwardly extending flange which is peripherally secured to said disc to form a chamber therewith; said valve member being adapted to be swung into such chamber for flow of calking material through such opening, such chamber, and said spout; said flange being laterally flexible for flexing toward said disc to displace through said spout some of the material in such chamber and to engage and move said valve member to a position closing such opening.

5. The nozzle of claim 4 wherein said flange terminates in an annular rib which engages and moves said valve member as aforesaid.

6. The nozzle of claim 4 wherein said flange is thus flexed by tilting said spout.

References Cited in the file of this patent UNITED STATES PATENTS 1,879,205 Gunn Sept. 27, 1932 1,933,646 Witt et a1. Nov. 7, 1933 2,441,704 Jackson May 18, 1948 2,565,699 Rieke Aug. 28, 1951 2,575,040 Batzler- Nov. 13, 1951 2,657,832 Rose et al., Nov. 3, 1953