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Publication numberUS1469666 A
Publication typeGrant
Publication dateOct 2, 1923
Filing dateJun 17, 1922
Priority dateJun 17, 1922
Publication numberUS 1469666 A, US 1469666A, US-A-1469666, US1469666 A, US1469666A
InventorsJohn Karitzky, Pleister Henry W
Original AssigneeHenry B Newhall
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Bolt anchor
US 1469666 A
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Description  (OCR text may contain errors)

oct. 2,1923. f 1,469,666

H. W. PLEISTER ET AL BOLT ANCHOR Filed June 17. 1922 2 Sheets-Sheet 1 oct. 2, 1923. 1,469,666

H. W. PLEISTER ET AL BOLT ANCHOR 2 sheets-sheet 2 Filed June 17. 1922 ,Ary

* NHTE s'rr PATEN I ,HENRY WrLEIsTER, or WEsTrIELn, AND JOHNKARITZKY, F 'cinr'wto013,.;Niliwim'n7 y sEY; SAID rLnIsTER AssIGNon- To HENRY 13.A NEWHALL YAND SAID KA- RrTZKY As-v f. l

` Vin connection with the accompanying drawy Patented Oct. 2, 1923.



Application laviunei i922. j seiialno. 569,129. j

To alliez/#hom t may concern: i

Beit known'that we, HENRY yW.1I LnIs' 1fiiR, a citizen of the United States, residinV at' Westfield, in the county of UnionV and tate of New Jersey, and JOHN KARITZKY, a lcitizenj fof the United States,fresiding at Garwood, inthe county of Union'and (State of New Jersey, .have made certain' new and useful Improvements in' Bolt Anchors,` of' which the following is a specication taken ings.

' roL'r Arterien;

. 'Our invention lrelates to ybolt anchors."

Y portion undercompression so-that'the metal More particularly it relates to la'. .ductile shield! adapted to haveja portion of the shield plafced under tension, .and another of the shield will "iow into thelvo'ids and irregularities of the surface of the hole within which the shield. is'mounted.Vv

Our inventionffurther relates to a 'ductile Y shield provided 'with a vtapered and-aconnected cylindrical bore there being a stop'or Vshoulder between the two bores.

O ur invention furtherrelates to such 'a bolt anchor in which' the shield and cone, o'r expanding member, are 'formed of materials of different strength, the expanding cone beingof greaterrhardness and less ductility than the shield.

'- jfOur invention `furtherv relates to Vforming the shieldjo't some' ductilematerialyas aluywhen it is expanded 'themetal willl How,

' more or less, intothe irregularities and voids of. the wall or' the hole.H The expandingcone isformed of'some hardermaterial, as for example, `1ron,'wh1ch 'may Ior may not 'he` galvanized.

Our invention i' fnrther relates to certain combinations, 'details of constructions, and

articles of manufacture, which willfbemore. fully hereinafter described and pointed out.- Q Yin the claims. Y'

Ourinventlon may be applied to different 'forms of ductile shields. vWe have shown the 'drawings several vdii'erent forms ofisuch shields,althou-h it is to be particularly uni i derstood that t ese are shown by way of 'exi v ample and 'that our invention is lnot vto be limited thereto. inthe accompanying drawings the saline the shield and expanding member shownlin '95e refereneefnumerals' refer to similar parts-` in i 0f our bolt anchor located therein andtprior to being expanded,V Y

Figa@ is a view slmilar Vto showing the duetile shield after ithasbeen expanded Fig. 3 is a horizontal section through theVl shield :and expanding memberfshown-jin Fig. 1;' f Fig". ele-is an end elevation of theshield show-n in'Fig. l; *l

formV of ductile Shield;


Asection on the' line 8 0.

l Figli isa. vertical section through a'wall o r other suitable support showinglgthe ductileshield of Fig." 9^inits operative'or expanded position; f l: f "l -"Fig, 12 isa side elevation ofstilllanotlier modification in' which two expanding meml bers are used';`:v i Fig.`l3 is a vertical section on the linef Wallo'r'otherlsnitable support showing'the ur 'invention broadly covers afdu'ctile` Y shield which is adapted yto beeXpande'dby;

placing aportion of theshield-nnder tension f 1 101)- H and another portionunder compression.`

"Our invention also broadly .covers ,af 'duce l' tile shield havingf'a taperedbore anda cylindricalfb'ore, there being a 'stop or. shoulder or Y other member. stoppingtle enpandingniem- Y j bei' operating in the tapered bore, from cooperating withrtlie Vcylindrical bore eze cept under certain conditions. This insures that there will be'iirst a tension of' the metal andan expansion at the end of the ductile -shield in whichthe taperedbore islocated.

This is usually et the inner end removed from the face of the wall or other suitable After a portion of the ductileTV supportrl. shield has been expanded by the expanding member Cooperating with the tapered bore, the ductile shield is then further expanded by yplacing4 another portion of the` ductile shield under compression, which will/ cause the shield torbe shortened in length but ini creased: in diameter. This results-in two separate and distinct expansions of the duc;

tile metal both of which add tothe yhold or gri-.p of the bolt anchor or shieldrwithin the hole 2 of the wall or other suitable support 1'.-

It is well known that in drilling` a hole 2,

. in a wall or other suitable support 1,of manufactured stone or brick, cenientor natural stone, there is a certain dislodgnient of pebbles oilsand andhnrd particles. constl y ing the mass. ln oiir` invention we ins e that` the vinner Vend V5 Soft the shield 1l iwillfill up all these inequalities or voids .in the-surface of the hole 2 thatilie adjacent thexeiidV The expansion at ythe i-iliner end maybe made inenyjsuitable mzinneigsiich as by the threaded cone 5 cooperatingwith the screwthreads upon the bolt or screw 6.V 4llfiis/cone cooperates with a tapered bore 7 and with a screwY orbolt 6 which passes ,throughthe cylindrical bore 8, afterhaving beenglii'st tation,.fof-the'bolt or screw. G. pleces thatY portion ofthe metal of theshieldd between the stop or-shoulderv12 and the end 13,;Fig; 3,.- under compression, which servesf. to slightly shorten the length of the .shield t sind at the saine time increases .its diameter,

sot-hat throughout practically the cntirecir` cumference ofrtheshield, first by exerting tension and then compression, themetal 4will iowradially and i'ill up the voids and irregularities in the` wallsV of the hole. 2.. By

forcing-the metal of; the diictile l,shieldvtiov flow... into these inequalitiesor irregularities or voids ...we obtain particularly strong` union or 'hold Vwith the ywallorcther suitabe support, our bolt anchor making a much holt. `G, in

stronger union or hold than bolt anchorsv of the saine size now on the market. 1n Fig. 2, and' inv some ofthe other. figures, the

expansion or i'iowing of the metal of the X shield into the inequalities orV voids of the.

wall 2 has been purposely cicaigerated to more clearly illustrate the invention. i A

rl`he particular contour andshape of the ductile shield may vary. le have shown in the drawings several different forms of ductile shields. For example in Figs. Y1 to 5, the ductile shield.' 4l is provided with a plurality of integral members or tines 15, 16,`r

connected together byv integral webs 17, 17 of less thickness thanthe ti'n'es 15 andy 16 forming' grooves 18,18. 1.5: I

lWhen the hole 2 is. correctly drilled so that the ductile shield 4` will jnst iituthehole 2, the expansion shield Vmay he expanded `by simply stretching the webs 17, 17 ftoex'pand theintegral tines 15 and 16. ln other. cases,

when the hole 2 is a littlelarge, or the riiallsy orother supportsl are soft, and. fiillvfrir;

regularities or voids then, thel web 17 will be fractured orl broken when thetinesl andl-1 are .expanded as shown in Fig. 2.

ln Figs, 7r and 8,'- we haves'lidlwif Inother modification of the forni ofthe cliifctile shield. ln this' modiiricetion :the` du'cpi e shielde18. is provided 1witlitwo sepA rate and distinct tines 19 and 20,'havingwslot`s bore8-7- ln` this Vfo'rm o f ourinvention', the separate,and` distinct: tii'ies V19aii` d, 20` vnre connected togetherpbydmeans of a dovetail 22y on one tine, ,connectingfwith a dovetail 215 2.1" Xteiiding from the periphery totli'e'axial sioteainiiis @therese Tirsosrsees 0i expandingtlie diictile'shield 1 8 thefsaine as that previously de cribechex ept th this ,form the expanding ineinbenor cf movingvdo-ivnthe tapered boire/.7, `will ex@Y pand the ends of the tinesv 19fei1d20; unless the .hole 2 isY perfectly ='d iilled willV breal: or .fl'actu 4the,dovetail .ioiiitw22f and. 2,3,fes'Y shownI in Fig. Asso'on astl'ieeiid of thecone i1 reaches the stop` or Asliblilei' l2, the rest of the iiietal ofthe duetileslii/eld 1,8is putuiClrcOllPression and willshorten the shield .and .increase its diameter .the manner fully described in vconnection Ywith" the first Vforni. Y `Y ln Figs. 9,.,1Qrand111 we Ihave.y'slioii/ n a still inrther niodicatidiiofoiir invention, inwh iclh theY ductileshielyd 2li is formed Oris Single.iitesrel,niiiibelxtlleinetl lf th' shield being siich as vto permit the YeXpansion of ,the end 25,;and. the Yincrease.A'iii diaiietei of "the,Y yshield, :froinfabout-.the 4point 26 to .the end 27.` without having tines. or other parte.

Y connected byV webs ethenbrealrable .'mein bers. in this formofour invention -tli'ecoiie 5 will place the yinstal inthe end 25 ifii'i'cfler` tension to expand it'until cojiie Vreaches the stop orlshouldeiz12', fromy which'. point the cone will place the nietel of 'the shield,

between the points 26 ryand27, under com-' pression and expand itz radially Vinto the;

voids and inequalities ofthev surface of the -hole2V as shown in Figi" 11; l

. In,Figs."12,l13 and laws havev shown another moditicationof our invention, in which Y the Yductile shield 28 is Vformed; with two tapered bores 7, Y endingIi'n stops or l.shoulders 1'2, 12, the two tapered bores being connected by a single cylindrical bore-29. Within the inner taperedbore 7 we mount the'V same conical screw-threaded cone 5. Within the other tapered bore 7 we mount an unthreaded cone 30. In this form ofV our invention, the bolt or screw 6 is passed through the worlr 9, thence through the unthreaded cone 30, cylindrical bore 29V and into the screw-threads of thecone 5. .B y

rotating the head 10 of the bolt or nut 6,

the cone 5 is caused lto move down its tapered bore 7, which at the same time .causes the ductile shield 28 to move up the cone 30,v

.the work being held between `the 'cone 30 andthe head of the nut or screw 10. yThe effect is to cause the conel 30 to also move down or cooperate with Vits tapered bore 7 lWhen -the end l1 of the `cone 5 reaches its shoulder or stop 12, and When the end 31 of the unthreaded cone 30 reaches the shoul-v der Vor. stop 12 on the right of'Fig.- 12, further movement along the different tapered bores 7, 7 is arrested. Further rotation ot the nut or bolt 6 willthen cause the metal of the shield between' the stops Vor Yshoulders 12, 12 to be compressed,'which.will tend to shorten the length of the shield 2 8 and at the same timeincrease its diameter, permitting. Ythe ductile metal to fill up all the voids and inequalities within the surface ofthe 2 in the wall 1.

Infthis particular form yoif shield 28,`we have shown it provided with a groove 32 and a 'breakable web 33, the same as shown hole in Figs. 1 .andv 2.0i? the drawings, though' of course it is to fbe understood that the particular formof shield may be varied.

In Figure 15 we have shown a vertical section of Figure 2, in vwhich the end yof the.


conical nut 5 is 'shown forced past' the 12' and into the cylindrical bore 8.

In all formsY of our invention illustrated, the ductile shields are so formed lthat the expanding member Vor conef5, or cones 5 and 30 of Fig. 12, can be securely held within the ductile shield by friction, by. simply giving them a slight tap or blow, which insures that the cones or expanding members and shields will not become. discon-A nected from vibrations in transportation 'or through rough handling, thereby obviating A the necessity of the lpurchaser or jobber going vover the shipment to see whether or not all the bolt anchors are properly assembled and held together and to reassemble such as have come separated `during transit.

While ywe preferably-.use my. invention witl'i such shields, it is of course to be .understood that other forms of shields maybe .usedland I.

those illustrated *and` described. f.

that ourinventionis not tozbe 'limited to;7 'n

if 0 Y Having thus; described this; invention" .ini

connection with illustrative 'embodiments thereof, to the A"details of which we do-,notl desireto be. limited, what i-s claimed as newv and what is `desired to securey by Letters Patent is set forth'. in the appended claims. Whatwe claimis:-. Y 1. A'new article of manufacture comprise ing a ductile shield having' a plurality of separated parts connected together andl provided with a tapered bore and a cylindrical ,bore there being a shoulder between lthe two bores.

2. A new article of manufacture compris ing a ductile shield having a pluralityv ofV soV 'separated parts connected together by break'- able means and provided with` a'tapeied bore and a cylindrical bore `there being a shoulder between theY two bores. 1

3. A new article of manufacture comprisand Yan interposed cylindrical"` bore there beingr shoulders between thetapered bores Y and the cylindrical bore.

4. A boltganchor comprising" a ductile" eo iing a ductile shield'havingH Va plurality of. Y .Y p Ytapered .boresone at cachend ofthefshield shield having'V a 4tapered `and `cylindrical bore, a'conical nut. adapted to enter theA f tapered bore, .means to retardY the conicalnut :from enteringgthe cylindrical. bore V1ooexcept on excessive expanding pressure, and

means to cooperate with. the screwthreadsffz of the nut to `operate thepbolt anchor.

cooperatevWith thescrewthreads lofthe nut to operate the bolt anchor. v

6. A bolt anchor comprising 'a ductileA Atapered' n bore, anv expanding member adapted to enter both shield 'f having both an expanding' bore andan expanding cylindrica the tapered and cylindrical expanding bores, 5

when the maximum holding effect is desired.

u 7. bolt anchor comprising a ductile vshield having both an .expanding tapered V bore andan expanding cylindrical bore, an,`

expanding member adapted lto enter both the tapered and cylindrical expanding bores, and a stop to retard said expanding memberk from entering the cylindrical bore except land means to retard said expanding member 1 from entering Vthe cylindrical bore excepty when the maximumholding effect is desired; Y

connected .expansible' parts fandv Vprovided i 8.1 A boltA anchor comprising a ductile i i Shield having a Pluralityof Separated-and"13e` with: wtalpeed ad cylindrical bore havingdrca-l bore, and twoexpzmdngmembers;

a;lstepybefwveenzfthgz-twp bores, and-'an -exf adapted to cooperate'wth the tapered bores pandingimxmberf aadaptedtorcooperate' with and W-ththetwo stops of shoulders.

' 'the tapered bore-andewth; midst-op. HENRY W. PLEISTER.

5 9, A bolt andorvcomprfsng; a duetle.- VJOHN KARITZKY,

sheldzhwvn-g a: pluralityY ofexpansble parts Ttnesses Y andi` having-tw@ taipelzedboresf 011e1=a=t each: Y MARY R. RYAN' and; o'thfeishelrclg-.a cylndrcah bor-e1 connect- H. LWLVILLIAMS, Y in'gvzsaifd 'tapered bol-esgshouders 011 stops be- Y L HESSLET, 10'l tweef.thtwu'tzvpened bares-'and thf cylin-l EMIL BETZ;

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US6729821 *Feb 28, 2002May 4, 2004Karl GuthrieExpansion bolt
US7011281 *Dec 30, 2003Mar 14, 2006Karl GuthrieExpansion bolt
US7357363 *Mar 13, 2006Apr 15, 2008Karl GuthrieExpansion bolt
WO2013173216A2 *May 13, 2013Nov 21, 2013Climb Tech, LlcConcrete anchor point system
U.S. Classification411/24
International ClassificationF16B13/06
Cooperative ClassificationF16B13/068
European ClassificationF16B13/06D4B