US1908160A

US1908160A - Bolt anchor

Info

Publication number: US1908160A
Application number: US486919A
Authority: US
Inventors: Roy E Mcintosh
Original assignee: EDWARD OGDEN Co Inc J
Current assignee: EDWARD OGDEN Co Inc J; J EDWARD OGDEN COMPANY Inc
Priority date: 1930-10-07
Filing date: 1930-10-07
Publication date: 1933-05-09
Anticipated expiration: 1950-05-09

Description

Patented May 9, 1933 UNITED STATES PATENT OFFICE nor a. ncmrosn, or new roax, 1r. Y., assrenoa 'ro J. Enwaan comm comm,-

me, or new omen, new men, a conroaa'rron or mzw'masar m: ancnoza Application aim October 1, 1980. Serial No. 488,919.

' invention relates to bolt anchors adapted for forming anchorages in material such as brick, stone or cementltious material not ada ted to directly receive and retain a thread element.

The invention has for its salient object to provide an anchor that is simple and practical in construction, comprises a minimum number of parts, and will form an eflicient anchorage. v

Another object of the invention is to provide an anchor that can be easily and quickly expanded to anchoring position and 1s particularl efiective in oversized holes.

Anot er object of the invention is to provide a simple and inexpensive method of making an anchor constructed in accordance with the invention.

Further objects of the invention will appear from the following specification taken in connection with the drawing, which forms a art of this application, and in whlch ig. 1 is a sectional elevation showing an anchor constructed in accordance with the invention disposed in a wall opening prior to expansion;

anchor in expan ed position;

Fig. 3 is an elevational view showing a plurality of washers and a web retaining the washers in spaced relation to each other;

Fig. 4 is an end elevation ofthe construction shown in Fig. 3;

Fig. 5 is a sectional elevation of the anchor; Fig. 6 is an end elevation of the expanded anchor r Fig. is an elevational view showing onehalf of a two part mold and one method of forming the anchor; V

Fig. 8 is an end elevation of the mold shown in Fig. 7;

Fig. 9 is a view similar to Fi 7 butshowing one-half of a two part mol and another method of forming the mold;

Fig. 10 is a top plan view of the construction shown in Fig. 9; and

Fig. 11 is an elevational view showing the anchor as it is taken out of the mold shown in Figs. 9 and 10,

The invention briefly described consists of a bolt anchor comprising a plurality of washers formed of relativel hard metal, preferably frangible, and a ody portion of rela-' tively soft or ductile metal which forms a bond for holding the washers in spaced relation and is adapted to be expanded by pressure exerted longitudinally of the ax s of the anchor. tapered in cross section, being thicker at the The washers are preferably.

inner periphery than at the outer periphery a we thereof. When the washers are cast, connects them and holds them in spaced relation to each other.

- The'washers and connecting web are placed in a mold and a core is placed in the central opening of the washers. At their inner peripheries the washers are recessed or notched,

the recesses being disposed in ahnement to.

permit the relatively soft metal to flow longitudinally of the axis of the washers. Two difierentmethods of forming the anchor are shown. In one method the washers are supported with their axis horizontal and the connecting web extends into the pouring spout. As the soft metal is poured into the mold, the spaces between the washers are filled and the washers are bonded together by one or more longitudinally extending webs of soft metal, these webs being-formed in the recesses. After the metal has been poured and the mold sections have been separated, the soft metal sprue is broken oil? and the web which connected the washers will be broken off with the sprue.

In another form of the invention the washers are supported with their axis vertical, as shown in Figs. 9, 10 and 11.

Further detalls of the invention will appear from the following description.

In the particular form of the inventionfrom the inner periphe' and in the form of the invention shown in i 4 two sets of r cesses are illustrated atdlametrically opposite points.

Fi 7 and 8 illustrate one method of forming t e anchorage. In these figures there is shown a mold comprising two sections and 26. The washers -and connecting web 20 are placed in the mold as shown in Fig. 8, with the connectin web into the pourmg spout 28. A core extends through the mold and through the openings in the washers, as shown in ig. 7.

The softmetal is melted and poured into the pouring spout 28 and fills the spaces between the washers and flows longitudinally in the mold, forming a pair of bonding or connecting portions 31 and 32.

When the anchor is removed from the mold, the soft metal sprue 33. which is formed in i the gate opening andweb 20 are broken off,

leaving. the anchorin the form shown in fn the method illustrated in Figs. 9, 10 and 11, the washers-and web are supported vertically between a pair 'ofmold

sections

35 and 36 and a central core 37 extends through the washers. Th'e melted soft metal is vpoured through

openingls

40 and 41 and fills the spaces between t e washers and also the re-' cesses 21. The anchor as itis removed from the mold is shown in Fig. 11. The sprue 42 is then broken off and the web 20 is also broken off leaving the anchor in the form shown in ig. 5.

The anchor is expanded in the manner shown in Figs. 1 and 2.; A headed bolt is passed through the anchor and the anchor and bolt are inserted in the wall opening or hole in the manner shown in Fi 1. A pipe or tubular member 52 is place around the shank of the bolt and is tamped with a hammer or other suitable tool, thus forcing the soft or ductile metal body portion of the anchor to be expanded laterally into gripping engagement with the wall opening. The hard metal of the washers 1s preferably frangible and breaks into fragments under the pressure exerted by the expanding tool. As the hard metal washers are broken, the soft metal fills the spaces between the fragments and since the washers are tapered the soft metal will be forced laterally and outwardly. As a matter of fact, the broken fragments of the'hard metal washers function in a manner similar to the aggregate in concrete and reinforce the anchor.

Anchors such as that described may be used singly or, if desired, a plurality of such anchors may be used and in this case they are expanded successively.

Although certain specificembodiments of the invention have been particularly shown and described, it will be understood that the invention is capable of modification and that 20 extending upwardly changes in the'construction and in the tr-f rangement of the various cooperating parts may be made without departing from the 1 spirit or scope of the invention, as expressed l 7 v a o in the following claims.

What I claim is:

1. A bolt anchor comprising a bodyportion of relatively soft metal having a central opening therethrough, and a plurality of spaced washers of relatively hard metal surrounding said opening and embedded in said 4 soft metal body portion, said washers having openings coaxial with the opening in the soft metal and being held in spaced relation by said soft metal. p 7 p 2. A bolt anchor comprisin a 'body portion of relatively soft metal, an a plurality of spaced washers of relatively hard metal embedded in said soft metal body portion, said washers being wedge-shaped in section and held in spaced relation by said soft metal.

3. A bolt anchor comprising a body portion of relatively soft metal having a central opening therethrough, and a plurality of spaced washers of relatively hard frangible metal surrounding said openingand embedded in said soft metal body portion, said washers having openings coaxial with the opening in the soft metal and being held in spaced relation by said soft metal.

4. A bolt anchor comprising a plurali axes coincident and dis osed in spaced relation to each other, an a body ortion of relatively soft metal embedding said washers and bonding the washers in spaced relation to each other.

5. A bolt anchor comprising a plurality of alternately arranged, successive transverse sections of elements of relatively hard metal and of relatively soft metal, said sections being bonded together into an integral unit.

6. A bolt anchor comprising a pluarlity of" layers being bonded together into an integral unit, said anchor having a central bore or opening therethrough formed by said apertures. v

8. A bolt anchor comprising a plurality of apertured washers of relatively ard metal of relatively hard metal washers having t eir.

arranged in spaced relation with their axes coinciding an the openings therein in substantial alinement, and a body portion ofductile metal filling thespaces between the washers and forming a bond to hold .the washers.

9. A molded bolt anchor unit comprising a structure having spaced oppositely facing outwardly tapered portions of relatively hard metal, and a sleeve of relatively soft material disposed between said tapered portions and filling the space therebetween prior to expansion of the anchor.

10. A molded bolt anchor unit comprising a structure having 0 positely facing portions inclined relative to t e axis of the anchor and away from each other and formed of relatively hard metal, the parts of said portions remote from the axis being farther apart than the parts nearer the axis, and a sleeve of relatively soft material disposed between said portions and filling the space therebetween prior to expansion of the anchor.

11. A molded bolt anchor unit comprising a structure having oppositely facing portions inclined relative to the axis of the anchor and away from each other and formed of relatively hard metal, and a sleeve of relatively soft material disposed between said portions and filling the space therebetween prior to expansion of the anchor.

12. A molded unit for a bolt anchor comprising a structure having a plurality of oppositely facing portions held in spaced relation by an integral member, said portions and member being formed of .relatively hard material, and a sleeve of relatively soft material disposed between and filling the space between the oppositely facing portions.

13. A molded bolt anchor unit comprising a structure having spaced oppositely facin tapered portions of relatively hard metal, an a sleeve of relatively soft material disposed between said tapered portions and filling the space therebetween prior to expansion of the anchor.

14. A bolt anchor unit comprising a body portion of relatively soft metal and a plurality of spaced washers of relatively hard frangible metal, said washers surrounding the bolt and being held in spaced relation by said soft metal and the spaces between the washers being filled thereby.

ROY E. McINTOSH.