US1392703A - Expansion-shell - Google Patents

Description

J. H. PHILLIPS.

EXPANSION SHELL. APPLlcAioN man 1uNE1s. 1920.

1,392,703., Patented oet. 4, 1921.

6g t i :l All.,

@fifa/617%? ZM 'J JOHN H. PHILLIPS, OF-CHIGAGO, ILLINOIS.

EXPANSION-SHELL.

vSpecification of Letters Patent.

Patented @et 4l, 192i.,

Application filed Enne 18, 1320. Serial No. 389,891.

To all whom t may concern Be it known that l, JOHN H. PHILLIPS, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Expansion-Shells, of which the following is a description.

My invention belongs to that general class of devices known as expansion shells, and relates particularly to a shell which may be employed to drill its own hole in concrete, brick, stone, or like material, and then be utilized for fastening and holding various devices and mechanisms to said material.

Anchor or expansion shells are largely used on walls, ceilings and iloors of concrete, brick or stone, for the support of pipe and wire systems and mechanical, electrical and other equipment, etc. My invention has among its objects the production of an expansion shell of the kind describedithat is simple, convenient, efficient, reliable, Vdurable, inexpensive and suitable for use wherever found applicable. It has particularly among its further objects a shell which may be placed in a suitable chuck of a percussion or rotary type tool, and employed to drill the hole in which the shell is placed, and the chuck be :then removed and the shell expanded so that it is securely and firmly and to all intents and purposes permanently retained in place for the purpose of carrying such devices or equipment vas may be found desirable. It has particularly as anobject the production of a shell which being employed to drill the hole in which it is to be seated insures the securing of a hole of the right size and depth into which the shell will iit perfectly and in a most workmanlike manner.

To this end my invention consists in the novel construction, varrangement and combiiivation of parts herein shown and described and more particularly pointed out in the claims.

In the drawings, wherein like reference characters indicate like or corresponding parts,

Figure l is a sectional view through one form of my improved shell;

Fig. 2 is a similar-.view of another form;

Fig. 3 is a similar view of another form;

Fig. 4 is a sectional view taken substantially on line 4 4 of Fig. l;

Fig. 5 is a sectional view taken substantially on line 5 5 of Fig. 2;

Fig. 6 is a sectional view taken'substantially on line 6 6 of Fig. 3;

Fig. is a sectional view similar to Fig. 1, illustrating anotherform of the device;

Fig. 8 is a similar view illustrating another form Fig. 9 is a similar view illustrating another form of the device; and

Fig. l0 is a similar view illustrating still another orm.-

*Referring to the drawings, particularly Figs. l and 4, l represents a tubular shell of the desired number of parts, as shown, one part of which may be slit as indicated at 2, so that the same may be expanded in its proper hole. The shell is provided with cutting faces or teeth 3 at the inner end, and constructed at the opposite end to engage in asuitable chuck. As shown, the same is tapered as at 4 so as to tit into the coperating chuck part, and the same may also be provided with a hole 5 in which a tool may be inserted to assist in releasing the same from the chuck, as well as to provide means for attaching a coperating part. After the shell has been employed as a drill to drill its own hole, the chuck is removed and a plug 6 preferably of soft metal, for example, lead or the equivalent, is driven into the shell, and the same being upset, causes the shell to be expanded, so that the same engages the walls of the hole and is retained in place.

rlhe upsetting of the plug expands the inner Y end of the shell, so that it is wedged or locked in place. After the same has been placed, the hanger may be inserted in the shell or about the same, and a pin or equivalent member inserted through the hole 5 and the hole in the hanger so that the hanger will be supported or the hanger may be constructed to engage in a pass through the holes. Any device to be supported may be so attached to the shell.

The type of shell shown in Fig. 2, as well as Fig. 5, is the equivalent, except that in this case the same is made 'in two or more parts 1l. As shown, the same consists of two parts divided as indicated at 12, 13 begil ico

ing the cutting end of suitable form. In this particular case a slightly different style chuck may be employed which will engage and abut against the end 14n/of the shell and drive the same into the material.

In this type I have shown holes or openings l5 and cut out portions,- as indicated at 17.l This device is particularly suitable for a flat hanger, it being understood, however, that the types of shells shown may be constructed in a similar manner in so far as the cut out portion 17, so as to make them adaptedto a fiat hanger.

In the construction shown in Figs. 3 and 6the shell is constructed of one part 21, but the same may be preferably slotted as at 22, or in an equivalent manner, on the inner end, so as to permit the expansion thereat.

The same has the teeth 23. I have shown the outer end threaded as at 24, so that a hanger or the like may be attached thereto without any additional fastening means. This device may be expanded by means of a plug similar to 6, as previously described. The construction shown in Fig. 7 is substantially similar, except that in this case the shell 25., which is slotted as at 26 and formed with cutting edges or faces 27, is internally threaded as at 28, in this case the hanger or the equivalent engaging on the interior. An expanded plug similar to that 'described may be employed.

In the construction shown in Fig. 8, 31 represents the shell of one or more parts, 32 the plug, and 33 the cutting face or edges. In this case an elongated opening 34 is provided through which a wire tie or the equivalent may be inserted. Figs. 9 and 10 illustrate what may be termed a iiush pattern, the construction being suchthat the outer end is flush with the face of the material when the shell is in place. Referring to Fig. 9, 35 represents the shell constructed similar to any of the shells previously described, and provided with a cutting end 36 of suitable form. The same may be internally threaded aS at 37 for engagement with a hanger or the equivelent. The plug 38 mav be driven in place as previously described. In Fig. 10, 39 represents a shell preferably similar to that shown in Fig. 7, with one or more slots 40, cutting end 4l and thread 42. This parti'cular form is also a iiush type. Obviously the outer surface of the shell may be corrugated or roughened if desired.

It will be obvious that thevarious different features combined in the several figures may be combined as desired. I have not considered it necessary to illustrate the chuck, by means of which the device is seated, this being described in my application, Serial Number 361,903, filed February 7 1920. It will be noted -that the device is substantially a self-drilling expansion shell,which is especially applicable for fastening 'variouls devices' to concrete ceilings and the like, requiring the use of round and flat hangers, wire ties, bolt and screw connections, etc. In usingy the device, the shell is placed in the chuck and held firmly against the material to be drilled. The cutting edges or teeth may be brought to different points in the work by a slight back and forth rotary motion while the hammer or tool is operating, thus altering the position of the cutting edges for each blow. The slight rotary movement is more desirable in the case of the larger sizes, where the pitch ofthe teeth is greater. In the smaller size having finer pitch, the jump or vibration from the blow of the hammer is suiiicient to break olf thev material between the cutting points, permitting the shell to be driven straight in, under repeated blows of the hammer. As the work progresses the center or core corresponding to the bore of the shell breaks 0EV into short pieces, and together with the cuttings, falls down through the shell and out of the chuck. When the hole is drilled to the desired depth, the'chuck is removed, leaving the shell in the hole. A plug is then inserted in the shell the same as previously mentioned, being preferably of a fairly soft material, for example, lead or the like, and the same driven in. The driving in of the plug causes the same to be upset, expanding it and at the same time expanding the inner end of the shell in thehole, thereby causing the same to be.firmly and securely locked in place. To all intents and purposes the same becomes substantially a permanent part of the wall, ceiling or the like to which the various devices, or other equipment, may be secured by means of bars, hangers, pins, bolts, nuts, or the equivalent. The device has many advantages in that it is not necessary to provide extra drills, as 'each shell may be employed to drill its own hole. The

shells may be manufactured at comparaserve the purpose. They may be constructed in any suitable manner, of one or more parts as described, and after forming may be case-hardened or otherwise treated so as to increase' their durability. Among the decided advantages of the self-drilling expansion shell over the non-drilling shell is the perfect fit of the shell in its own hole, thereby requiring less expansion and permitting more acute taper of the wedging member, and correspondingly more powerful eXpansion than is possible with cast shells requiring greater expansion in order to accommodate the various variations in the size of the holes resulting from the use of separate drills.

Having thus described my invention, it is obvious .that various immaterial modifica-- lll anaemia What I claim as new and desire to secure vby Letters Patent is:

1. An expansion shell of the kind described comprising a tubular body arranged forexpansion at one end, and an expandlng plug of ductile material of a size to enter the bore of the body.

2. An expansion shell of the kind described comprising a tubular body arranged for expansion at one end and having cutting faces at said end, and constructed at the opposite end to enga e a coperating chuck, and an expanding p terial of a size to enter the bore of the body.

3. In a' device of the k'md described and in combination, an expansion shell consisting of atubular body constructed at one end for expansion, and arranged at the other end for engagement with a suitable chuck, `and having an opening through the body extending from end to end and a plug of ductile material arrangedin the shell, said plug of a size to be inserted in the otubular opening through the shell whereby the same may be upset to expand the inner end of the shell.

4. A combined expansion shell and drill consisting of a tubular body open from end to end, one end arranged to engage a suitable chuck and they other end arranged for expansion and provided with cutting .means at spirit of my invention;`

ug of ductile masaid last mentioned end whereby the shell may be employed to drill its own hole and be expanded therein without the removal of lthe shell from the hole, and an expanding plug of a size to fit said said last mentioned end.

5. A combined expansion shell and drill consisting of a tubular body open from end to end, one end arranged to engage a suitable chuck and the other end arranged for expansion and provided with cutting means at said last mentioned end whereby the shell may be employed to drill its own hole and be expanded therein without the removal of the shell, and a plug of ductile material of a -size to fit said tubular bore.

6. An expansion shell of the kind described comprising a tubular body arran ed for expansion at one end, and an expansion- 'plu of ductile material thegb ore of the body and of a length to be completely inserted therein.

An expansion shell of the kind described comprising a tubular body arran ed for expansion at one end, and an expanslon plug of ductile material of a size to enter the bore of the body, said shell being arranged for engagement with coperating fastening devices.

In testimonyv whereof, I have hereunto signed my name in the presence of two subscribing witnesses.

JOHN H. PHILLIPS. Witnesses:

ROY W. HILL,

BERTHA HARTMANN.

tubular bore at of a size to enter

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