US1222988A - Bolt-anchor. - Google Patents

Description

W.v PLEISTER.

son ANCHOR.l l APPLICATION FMD MAR. 17. 1916.

1,222,988. v Patented Apr. 17, 1917.

*. ff 12 y mi' @Mm ATTORNEY HENRY W. PLEISTER, OF WESTFIELD, NEW JERSEY, .ASSIGNOR T HENRY 1B. NEWHALII.

BOLT-ANCHOR. i'

Specication of Letters Patent.

Patented Apait, 1917.

Original application iled October 16, 1915, Serial No. 56,239. Divided and this application led March 17,

1916. Serial N o. 84,896.

To all whom t may concern:

Be it known that I, HENRY W. PLEISTER, a citizen of the United States, and a resident of Vesteld, in the county of Union and State of New Jersey, have invented cerf I have shown 1n Ithe'acconnpanying drawtain new and useful-Improvements in Bolt- Anchors, of which the following is a speciiication taken in connection with the accompanying drawings, which form a part of the same.

This application is a division vof my copendingapplication Ser. N o. 56,239 led October 16, 1915, for bolt anchorsy and method of making same.

My present invention relates to a newand improved boltanchor in which the `screwthreads of the screw. cut their own coperating female screwthreads in the bolt anchor. In this form my bolt anchor is made out of a comparatively soft metal suchas a lead alloy or similar material, which is s ofter than the metal of the wood screw, or lagvbolt, should the latter be used. In this art relatively soft bolt anchors, in which the wood screw cuts its own coperating female screwthreads, are known as` anchors, lead anchors and Screw anchors. l

More specifically my invention relates to such an anchor, lead anchor orl screwy an.

chor, which can be manufactured `at the minimum expense due to the saving of material. v Y

My invention further relates to a relatively soft rod or bar having a plurality of units, the Vunits having open sides, whereby one or more units may be broken on' to form an anchor, lead anchor or screw anchor of the required holding capacity. Y

ings several illustrative embodiments of my invention, but of course it is to'be understood that my invention is notto be conned simplytothe forms illustrated. In these drawings the same reference numerals refer to similar parts. I Y I lFigure l is aside elevation, partly in vertical section of one of my improved anchors; v

F ig. 2 is a view partly in side elevation andV partly infvertical section of lone of my anchor rods or bars which vmay be used as one anchor, or which may be broken into one or more units, if an anchor of less'holding capacity is required; v

Fig. 3 is a verticalv section of oneductile unit broken from the rod or bar illustrated in Fig. 2;

Fig-t is a side elevation of the preferred form of my anchor, formed of two units, and shown mounted in a hole or support and prior to being expanded, the support being shownfin section;

Fig. 5 is a Vertical section through my improved anchor after it has been expanded by the screw shown, or any kother suitable means, the support and the article supported being shown in section; l

Fig. 6 is an end elevation substantially on the line 6-6 of Fig. 4, looking in the direction of the arrows, showing the units formo ing 'a substantially.cylindrical anchor and 2 and 3, the unit 2 havinganl openiside 4 and the unit 8 having an open side 5, the open sides beingat an angle to each other and preferablyformed staggered. Between each unit and its adjacent unit there is a connecting member formed of'two. arms6, 6. l

The open side 4c is provided with an inclined surface 7, and the open side 5 is provided with an inclined surface 8, the two inclined surfaces being atan angle to each other. These two' inclined surfaces 7 and '8 form an inclined bore 9 which is interrupted or broken opposite the openjsides 4 and `5v of the units.

I preferably, though not necessarily, form the units 2 and 3, so that in their unexpanded position theywill substantially form a cylinder which, 'ofcourse, would not be continuous throughout fthe length of the bolt anchor due to the units 2 and 3 having open sides. Y f I In locating my anchor in a wall or other support l0 the hole l1 is drilled or otherwise formed substantially atV right angles to theA face l2 of the support, the hole being about the same depth as the length of the anchor. The length of the latter is determined by the ico Y the wood screw 14, is passed through the work13 and into engagement with the respective inclined surfaces 7 and 8 of the units 2 and 3. The wood screw will as itis screwed home, cut its own cooperating female screwthreads in the comparatively soft or ductile material of the inclined surfaces 7 and 8, and will cause a tremendous expansion, which in the unit 1 forexample, will begin some little distance back from the outer end 17 and reach its maximum, in that unit, at the point 18. On the other unit 3 the expansion -will progress from the point 19 and reach its maximum at the .point 20. Thisaction will insure a powerful gripping action between the anchor and the support, whether that' Vsupport be brick, masonry, concrete, tile,

stone or any othermaterial.

I preferably, though not necessarily, provide the bolt anchor 1 with one or more lugs 21, which may be bent sufficiently to form a support for the wood screw 14, or other expanding member. These lugs may also hold the wood screw kto the anchor for purposes of shipping or storing. Y

In the expanding action which I have just described, the connecting member formed of arms 6, 6 will ofcourse bend slightly to permit of the expansion. I alsopreferably provide theV exterior of my units with transverse ribs or corrugations 28, 23 to insure that they have stronger frictional hold against the wall of the hole 11 inthe support 10.

It will be clear that with my bolt anchor I obtain a tremendous expansion or holding capacity using only aminimum amountof ductile or relatively soft metal, the saving of which permits me to manufacture my anchor` at minimum expense.

The method of manufacturing my anchor is described inY full in my copending vapplicationsSer. No. 56,239 and Ser. No. 84,895, filed concurrently with this divisional application. Y Inl this application Ser. No. 84,895 the method kis claimed.V

By my invention I may cast a ductile rod or bar 24, Fig. 2, of a plurality of units 25 and 26 which may be of any suitable length. For convenience in handling and shipping these ductile bars or rods 24 maybe shipped direct to the jobber or retailer or user who may use the entire bar as one anchor or may break olf one or more of the ductile units to obtain a smaller anchor and one ofthe par; ticular holding capacity that he may need for the particular work to Vbe supported. He may for example, break od one unit, Fig. 3, or he may break ofi1 two or more units, simply by severing the connecting member 6, 6 between any two units.

It will be seen when my anchor comprises two or -more units, that their expansion is in opposite directions about a point intermediate the lengthof-the. anchor. It will also be seen that my anchor has a plurality of points ofmaximum expansion arranged in different planes.

Having thus described this invention in connection with the illustrative embodiments thereof to the details of which I do not de sire to be limited what is claimed as new and what. it is desired to secure by Letters Patent is set forth in the appended claims.

1. An article of manufacture comprising an expansible ductile anchor 'having a plurality of open sides. Y

2. An article of manufacture comprising an expansible ductile-anchor having a plurality of open sides arranged staggered with relation to eachl other.

3. Anarticle of manufacture comprising anexpansible ductile anchor having a plurality of open sides and a central axial bore.

4. An article of manufactureV comprising an expansible ductile anchor having a plurality of open sides, said sides having inclined surfaces atanangle to leach other.

5. An article l.of manufacture comprising an expansible ductile anchor having a plurality of open sides arranged on different portions of the anchor.

6. AnV article of manufacture comprising an expansible ductile anchor formed of a plurality of units, each unit having an open side and a connecting bendable member between the units.

7. An article of manufacture comprising an expansible ductile anchor :formed of a plurality of units, eachunit having an open side and a yconnecting bendable and breakable member between the units.

8. An articlecf manufacture comprising a substantially cylindrical rductile anchor formed of a plurality of units, each unit having an open side, anda connecting bendable member between the units, said anchor being provided with an internal bore having a plurality of tapers.

9. An'article of Vmanufacture comprising an expansible Yductile anchor having a plurality of open sides and an internal bore having` a plurality ofvtapers.

10. An article'of'manufacture comprising an-expansible ductile anchor rod formed of a plurality of units, each unit having lan open side and bendable and breakable connecting members connecting the units to permit the rod to be used as one anchor, or

to permit an anchor of any required length and of one or more units being broken off from the rod to form a smaller anchor, said rod being provided With an internal bore 5 having a plurality of tapers.

10 one of the open sides.

12. An article of manufacture comprising a substantially cylindrical ductile anchor formed of a plurality of units,l each unit having an open side, and a connecting bendable member between the units and one or more bendable lugs adapted to be bent to partly close one of the open sides.

HENRY W. PLEISTER.

Gopies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patent,

. Washington, D. C.

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