Adhesive cartridge

Abstract

A frangible ampoule can be inserted into a hole in which an object is to be anchored, and contains a first component of a two-component adhesive. A second component of the adhesive is externally adjacent the ampoule and so arranged as to be intermixable with the first component upon breakage of the ampoule.

Description

BACKGROUND OF THE INVENTION

The present invention relates to adhesive cartridges, and more particularly to adhesive cartridges which utilize a two-component adhesive for the purpose of anchoring an object in a hole in a wall or the like.

The basic concept of utilizing a cartridge provided with a two-component adhesive, which can be inserted into a hole of a wall or the like and wherein the adhesive will become active only when the two components of the adhesive are admixed with one another, is already known. Thus it is known from the prior art to utilize an ampoule of frangible material, for instance glass, which contains one component of one of the many well known two-component adhesives. This ampoule is in turn surrounded by another larger ampoule which accommodates the second component of the adhesive. When the two ampoules are inserted into a bore hole or the like, and are broken, the contents become admixed and will then constitute a hardenable adhesive or binder material.

The problem with all of the prior-art constructions of this type which are known to me is that they do not operate satisfactorily with certain types of material. In particular, they do not provide for a sufficiently uniform admixture of the two components when the bore hole into which the ampoules are inserted are formed in material which has voids, is porous, or the like, for instance porous concrete, perforate concrete blocks or the like. If, however, the two components of the adhesive are not properly and uniformly mixed with one another, they will not under all circumstances attain the desired binding capacity.

SUMMARY OF THE INVENTION

It is, accordingly, an object of the invention to overcome the disadvantages of the prior art.

More particularly it is an object of the invention to provide an improved adhesive cartridge utilizing a two-component adhesive, wherein the disadvantages of the prior art are avoided.

Still more specifically it is an object of the present invention to provide such an improved adhesive cartridge wherein a largely uniform admixture of the two components of the adhesive is assured, even under conditions which in the prior art prevent such admixture.

In keeping with these objects and others which will become apparent hereafter, one feature of the invention resides in an adhesive cartridge for anchoring of an object in a hole which cartridge briefly stated comprises a frangible ampoule adapted to be inserted into a hole, and a two-component adhesive. In particular, a first component of the adhesive is accommodated in the ampoule, and a second component of the adhesive is externally adjacent the ampoule and so arranged as to be intermixable with the first component upon breakage of the ampoule.

The arrangement of the second component is such that it is permeable by and/or penetrable by the first component when the ampoule is broken. This assures a good admixture of the two components, because when the breakage occurs--as a result of the insertion into the hole of a special tool or else of the object which is to be anchored in the hole--the adhesive component accommodated in the ampoule will necessarily be pushed from inwardly in outward direction, that is through the second adhesive component, so that a proper and uniform admixture will be obtained.

One of the components may for instance be in the form of a paste, and may be applied to the outer wall of the ampoule in form of a helical strip or the like. Again, the one component, that is the outer one, may be in form of a layer or coating which is provided around the wall of the ampoule. However, it is also possible to use for instance fibrous material which surrounds the outer or second component, or which is partly or completely impregnated with it.

It is important that the one component, that is here the outer component, is applied over a large area of the ampoule containing the other component. This is of great value in assuring proper admixture of the two components when the ampoule is broken.

To prevent drying out, removal, damage or the like of the outer or second component, the cartridge may utilize an outer envelope surrounding the ampoule and accommodating the second component. This arrangement assures that the cartridge can be stored over prolonged periods of time without having to fear any damage or other deleterious influence upon any of its components. It is also desirable that steps be taken to prevent a shifting of the outer or second component relative to the ampoule in the event that the cartridge should be dropped or otherwise impacted. This can be accomplished in an advantageous manner by providing the outer surface of the ampoule, and/or the inner surface of the envelope, with recesses which advantageously are more or less evenly distributed over the entire surface. Such recesses may be depressions, they may be grooves such as helical grooves, or the like. This also facilitates the insertion of the ampoule into the envelope, because the second component is now located in these recesses and cannot be displaced or damaged as the ampoule is inserted into the envelope.

The novel features which are considered characteristic for the invention are set forth in particular in the appended claims. The invention itself, however, both as to its construction and its method of operation, together with additional objects and advantages thereof, will best be understood from the following description of specific embodiments when read in connection with the accompanying drawing.

BRIEF DESCRIPTION OF THE DRAWING

FIG. 1 is a partly sectioned side view of a cartridge according to one embodiment of the invention;

FIG. 1a is an enlarged sectional view in axial direction through a portion of one end of the cartridge in FIG. 1;

FIG. 2 is a partly longitudinally sectioned view of a further embodiment of a cartridge according to the invention, accommodated in a bore hole;

FIG. 3 is a section taken on line III--III of FIG. 2, with the wall having the bore hole therein being omitted;

FIG. 4 is a view of a further embodiment of the invention;

FIG. 5 is a view analogous to FIG. 4 but illustrating an additional embodiment of the invention; and

FIG. 6 is a view of still another embodiment of the invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

Referring firstly to the embodiment in FIGS. 1 and 1a it will be seen that this identifies an adhesive cartridge 1 having an outer envelope 2 which is shown in broken lines and may be made of glass or another suitable frangible material, and an inner ampoule 3 which also may be made of glass or another suitable frangible material and which is shown in broken lines. The ampoule 3 accommodates the first or inner component 5 of a two-component adhesive, which is shown fragmentarily at 4. The inner wall of the outer envelope 2 is provided with the second outer adhesive component 6 in form of a helical strip applied to this inner surface. The spaces 7 between the individual convolutions 12 of the helical strip assure and make possible a proper admixture of the two components 5 and 6 because, when the inner ampoule (and of course the outer envelope) are broken, the component 5 can press outwardly uniformly through the spaces 7 and become admixed with the component 6.

In the embodiment of FIG. 2 the cartridge is identified with reference numeral 1a and has an outer envelope 2 and an inner ampoule 3. The latter again accommodates the adhesive component 5, whereas the adhesive component 6 is accommodated in a helical recess 12 provided in the outer wall of the outer envelope 2. This assures retention of the paste-like component 6 against displacement, especially during storage and transportation of the cartridge where otherwise this would not always be assured. FIG. 2 also shows the cartridge 1a accommodated in a hole 8 formed in a wall or the like, and in which an anchoring member 9 is to be inserted and retained by the adhesive action of the two admixed components 5 and 6. The insertion of the anchor 9, which results at the same time in the breaking of the envelope 2 and the ampoule 3, can be effected by the diagrammatically illustrated tool 10. The fragmentarily shown apertured sleeve 11 facilitates further a uniform admixture and distribution of the two components 5 and 6. It will be appreciated that as the anchor 9 is inserted into the hole, the envelope 2 and the ampoule 3 will be broken, resulting in admixture of the components 5 and 6 and even distribution over the wall bounding the hole 8. This is further facilitated, as pointed out before, by the sleeve 11. This even distribution of the component 6 circumferentially as well as in axial direction of the cartridge 1a guarantees a highly effective admixture of the two components, as well as a highly effective adhesive action once such admixture has taken place. This makes it possible to anchor objects even in material, such as porous concrete or the like, where this was not heretofore possible.

The embodiment of FIG. 4 shows a cartridge 1b utilizing only an ampoule 2 which accommodates the component 5. The outer circumferential surface of the ampoule 2 is coated with the component 6a. This is a particularly simple construction requiring only the ampoule 2.

In FIG. 5 the cartridge is identified with reference numeral 1a. This embodiment is advantageous if not enough of the second component can be applied in form of a coating, as in FIG. 4. In this case, also, a single ampoule or envelope 2a is utilized, but here it is surrounded by a fibrous sliver or material V which can either be wrapped over a coating of the second component 6, or which can be impregnated with the second component. Evidently, the sliver V can be thick enough so that it can accommodate in its pores or interstices enough of the component 6 to make up the required quantity thereof.

FIG. 6, finally, shows in more detail the use of the perforated sleeve 11. The sleeve is here shown fragmentarily in an axial section and the cartridge 1b is shown partially pushed into it. A comparison of FIG. 6 with FIGS. 2 and 3 shows that the outer diameter of the sleeve 11 is accommodated to the inner diameter of the hole 8, and the inner diameter of the sleeve 11 to the outer diameter of the cartridge 1a or 1b. Thus, the sleeve 11 has a multiple purpose, namely on the one hand to protect the wall surrounding the hole 8 from damage and undesired enlargement, which might occur on insertion of the cartridge and/or the anchoring element 9 if the material of the wall is of a readily damagable type, for instance porous concrete or the like. On the other hand, sleeve 11 assures an even distribution and admixture of the components 5 and 6 over the entire circumferential wall bounding the hole 8, as already pointed out earlier. This is particularly advantageous if the wall bounding the hole 8 is not smooth but has voids or the like.

It will be understood that each of the elements described above, or two or more together, may also find a useful application in other types of constructions differing from the types described above.

While the invention has been illustrated and described as embodied in an adhesive cartridge, it is not intended to be limited to the details shown, since various modifications and structural changes may be made without departing in any way from the spirit of the present invention.

Without further analysis the foregoing will so fully reveal the gist of the present invention that others can by applying current knowledge readily adapt it for various applications without omitting features that from the standpoint of prior art fairly constitute essential characteristics of the generic or specific aspects of this invention and, therefore, such adaptations should and are intended to be comprehended within the meaning and range of equivalence of the following claims.

Claims

What is claimed as new and desired to be protected by letters Patent is set forth in the appended claims.

1. An adhesive cartridge for anchoring of an object in a hole, comprising an outer frangible ampoule adapted for insertion into a hole and having an inner circumferential surface; an inner frangible ampoule received in said outer ampoule with radial clearance and having an outer circumferential surface; a first component of a two-component adhesive accommodated in said inner ampoule; and a strip of a second component of said adhesive helically convoluted on one of said surfaces, surrounding said inner ampoule and extending substantially across said clearance towards the other of said surfaces, the convolutions of said strip being spaced from one another so as to facilitate intermixing of said components upon fracturing of said ampoules.

2. A combination as defined in claim 1, wherein said second component is of pasty consistency.

3. A cartridge as defined in claim 1, wherein said second component is applied on said inner circumferential surface.

4. An adhesive cartridge for anchoring an object in a hole, comprising an outer frangible ampoule adapted for insertion into a hole and having an outer circumferential surface formed with substantially uniformly distributed recesses; an inner frangible ampoule received in said outer ampoule with radial clearance a first component of a two-component adhesive accommodated in said inner ampoule; and a strip of a second component having convolutions located in said recesses and spaced apart from one another so as to facilitate intermixing of said components upon fracturing of said ampoules.