US1762349A - Anchoring apparatus - Google Patents

Description

June 10, 1930'. 1 H, PHILLIPS 1,762,349

ANCHORING APPARATUS Filed May 29, 1925 Patented `lune 10,

'PT'ENT ePrice A:onu ii. ieHiLtIrs, or cHioAeo, ILLINOIS Aircnnine irannriis incanta met nay 29,

: may be employed to drill a relatively large number 'of holes in concrete, stone or the like and may be readily expanded in one 'of the holes to fscrve `as an anchor bolt. Another particular 'object of the 'invention' is to 'provide' an expansible self-drilling anchoring devicewhich Will firmly engage the Walls of a haie throughout the entire length of the hole after it 'has been expanded thereinp Many other objects-'and advantages of the construction herein shown and described will be obvious to th'oseskilled in the 'art from the disclosure herein given. f

To this end my invention consists in the novel construction, arrangement and combi- 5 nation of parts herein shown and described, `'and more particularlyfpointed out in the claims. l

In the drawings, wherein likereference characters `indicate like or corresponding opartsa y i y Fig. 1 is an elevation of an anchoring deviceiem'loodying the novel features of my invention, the anchoring device being shown in connection with a chuck whereby it may be 35. secured in afspring hammer orthe like; s

. .Figl 2 is a longitudinal section taken through my improved anchoring device, the

\ anchoring device being shown in its expand ed condition; s 0l .Figi 3 is an `enlarged fragmentary section `takensubstantially on the'same line as Fig. `2, but A"showing certain features 'of construcy'tion in vmore detail;

Fig. 4 is `a section taken on line 4-``4 of .Fi-g1; .1 Y i Fig. 5 is a section taken on Yline 5-25 of Fig. All;l l. y s

Fig. 6 is `an end elevation of the improved anchoring device; v Figs. 7 and `8 are sections taken on lines itat. sriai iid. aejwe.

7-7 and 8-8, respectively, of Fig. 6; and

Fig. 9 is a fragmentary elevation of an anchoring device embodying another form of the invention.

In the drawings, 10 is a tubular shell 55 formed of any V"suitable metal, such as forexs `ample case-hardened steel. The shell 10 is rprovided at one end with drill teeth 16 and 17 and "at its other end is collapsed to provide a tongue 19 which comprises superimposed 60 layers of metal. The tongue 19 may be inserted in a chuck 2O secured in a spring hammer or 'any other suitable device adapted to impart a reciprocatory motion to the shell. An aperture 21 is formed in the tongue v19 65 and aligned apertures 22 are formed in the chuck 20 so that the shell may be attached to the chuck by a pin or bolt (not shown) passed through the `apertures 21 and 22 if the drill tends to stick in a hole when it is to he withdrawn therefrom.

Intermediate the ends of the shell 10 are provided `a plurality of annular teeth 25 which have large diameters substantially equaling the largest diameter of the drilling end of the shell. In the drillingoperation the teeth 25 are adapted to assist the teeth 16 and 17 in removing material from the sides of the hole drilled into a ceiling 28 of concrete or drilled into any other wall or article. This negatives the necessity of allowing the clearance which is usually allowed on drill 'Shanks and the like and insures that the shell will snugly fit the hole' if it is subsequently expanded therein. The

`shell 10 is preferably provided with a plurality of slots 30 forming weakened portions 31 adjacent the teeth 16 and 17 and forming passages whereby material removed from the bottom of the hole may pass from the shell.

In practice, after the shell 41() has been employedto `drill a substantially cylindrical hdle 27 ina ivall 'or Ian object, it is removed therefrom, `and if `it is to be secured in this hole, 95 `a tapered plug 33 is seated in its drilling end, the plug being preferably formed of casehardened steel -or the equivalent.` The shell 10 is again driven :in the hole 27 by any suitable means and during this second drill- `wling member and through the aperture 21 in the tongue. f

ing operation the plug 33 causes the drilling end of the shell to expand in the manner illustrated in Fig. 2, the weakened portions 31 being fractured. The teeth 25 and the teeth 16 and 17 enlarge the inner end of the hole 27 as indicated at 35 and the shell 1() becomesiirmly fixed in the hole, as at the end of the second drilling each of the annular teeth 25 are imbedded in the Wall of the hole and each forms a head of greater diameter than the diameter of the hole just back 0f it. As explained above, the shell 10 will snugly lit the hole throughout 'the entire length thereof. Another featureof my invention is that some of the material removed by the teeth 25 when the shell is driven into the hole for thesecond time packs in between the teeth 25 and wedges the shell in the hole.

After the shell 10 has been expanded and seated in the hole 27 the apparatus or article which is to be carried by the shell may be secured thereto by any suitable means. Obviously, anysuitable coupling member (not shown) could be secured to the tongue 19 by passing a bolt (not shown) through the coup- In the preferred embodiment of the invention, the teeth 16 are primarily designed to remove material from the bottom of the hole during the drilling. operation and the teeth 17 are so designed'that they crowd the material intothe interiorof the shell so that it may pass out through the slots 30.' Of course,

both the teeth 16 and the teeth 17 removematerial from the sides of the hole.

f It will be readily understoodthatl the shell 10 can be employed to drill a plurality of holes 27. This will permit cheaper eXpansion shells i to be driven into the holes to serve as anchor devices, the shell 10 being expanded in one of the holes when it becomes worn. The cheaper expansion shells may be of the type shown in my co-pending applicaplurality of annular teethL so formed thaty tion Serial No. 33,775, filed May 29, 1925.

In a preferred embodiment of the invention, the tapered plug 38 is provided with a they do not tend to seize and bite into the shell when the plug is driven thereinto, but so formed that they will resist Withdrawal `of the plug from the shell or withdrawal of the shell .from the plug. This insures that the. shell will remain irmly seated in the hole.

As hereinbefore set forth, both the shell and plug are preferably hardened, as this constructiony permits rapid driving of the shell into the hole and prevents the teeth 16 and 17 from biting into the plug. Hardening the shell throughout its entire length stid'ens it and permits it to be used a maximum num-V ber of times as a'drill,fas well as insuring a minimum Vof distortion. thereof during the initial drilling operation.v 4

In Fig. 9, I have .shown another Vforni of the invention embodied in a shell 10a which in any suitable hammer device to drive the shellinto concrete or the like, the shell being preferably rotated or oscillated during the drilling operation. Of course, the shell 10a may also be employed to drill a plurality of holes and be expanded in one of them in the manner described above. c

Shells embodying the invention may be formed from pipe, tubing, or plates, or may lbe cast if it is so preferred. In some instances,

the shells may consist ofl aplurality of complementary sections embodying the invention.

Having thus described my invention,it is obvious that various immaterial modifications maybe madein the same without departing from the spirit of my invention; hence I do not wish to be understood as limiting myself to the exact form, construction, arrangement and combination of parts herein shownand described, or uses mentioned.

What I claim as new anddesire to secure by Letters Patent is: Y

1. A tubularanchor shell embodying drilling teeth at one of its ends, frangible members adjacent said end permitting expansion of said shell when broken, a chuck engaging portion at the other Vof its ends, means whereby cooperating parts may be attached directly to the shell after removal of the chuck, and cutting means intermediate the ends of the shell. Y

2. An expansible tubular anchor shell embodying drilling teeth at one of its ends, frangible means adjacent said end, an externally tapered portion at the other of its ends Whereby it maybe secured in a chuck, the tapered portion being providedl with internal Vscrew threads, and cutting means formed intermediateits ends. Y

3. An eXpansible tubular anchor shell embodying drilling teeth at one of its ends, frangible means adjacent said end, an externally tapered portion at the other of its ends, whereby Vit may be secured in a chuck, the tapered portion having means for operatively engaging apparatus to be carried by the shell,

intermediving means at the. other end, and a plurality of annular cutting teeth of equal diameters formed intermediate the ends of the shell.

5. A cylindrical anchoring device having a central bore therethrough and comprising drill teeth at one end thereof, frangible memhers adjacent said end and permitting expansion of said device when broken, said drill teeth having faces converging toward the longitudinal axis of the device to crowd drilled material into said bore.

6. A cylindrical anchoring device having a central bore therethrough and comprising drill teeth at one end thereof, frangible mem bers adjacent said end and permitting expansion off said device when broken, said drill teeth each having faces converging toward the longitudinal axis of the device to crowd drilled material into said bore, and drill teeth interposed between the rst-mentioned drill teeth and differing therefrom in form. In testimony whereof, I have hereunto signed my name.

JOHN H. PHILLIPS.

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