US1874591A - Expansion joint - Google Patents

Description

Aug. 30, 1932. C, QLDER 1,874,591

EXPANSION JOINT Filed Jan. 17, 1951 2 Sheets-Sheet 1 Aug. 30, 1932. c. OLDER 1,874,591

EXPANSION JOINT Filed Jan. 17, 1931 2 Sheets-Sheet 2 kfidel??? zffon'/ @Idar lintentecl Si@ i3? cnonn onnm, on

non, @minis hppllceton filled January ZLZ, 193i. eriel o., ltllli.

My invention relates to expansion joints and more particularly to metallic expansion joints for concrete doors, paven'ientsQ and the like.

The concrete pavements as shown hy the prior ort ere, as a rule, constructed in a plurality of sections with cracks or spaces between the sections, and with substantially larger spaces located et regular intervals for l@ the purpose of permitting longitudinal expension oi the pavement nndei` changes of temperature of the atmosphere. lhen the sections oi" the pavement expand, there is a graduel sliding of the sections toward the langen expansion joint, but when the sections subsequently contract they do not return to their ormer positions, with the :result that Eelatively vvide expansion space is smaller ond soon dise-ppears9 the spec-e heing divided m among the plurality of smaller cracks on speces ilosmed hetween the adacent sections oi the pavement and itis piaetically impossible to prevent this notion of the pave- W nient sections in closing up the larger enpension space.,

The open expansion spaces hetvveen adjecent sections soon becomes hlled with dust, soil3 door sweepingsor sand paeticles end as this material is generally incompressible 3@ it follows that when expansion again -tnles piece, the joints can not close between the adjacent sections and the whole series of sections is pushed still further toward the larger expansion space until eventually all 35 of the cracks, including the larger expansion space, become filled with hard packed unyielding material.- The purpose oi the original large expansion space is then defeated and further expansion of the concrete sets up compression stresses as great as would he the case had no expansion spaces provided in the rst place.

@ne of the objects of this invention is the elimination o the oregoin disadvantages oi prior constructions y e provision of an improved expansion joint of relatively simple and economical coction, which is adapted to permit relative movement hetween adjacent pavement sections, end to pmvent the f n oi ceacks on speces hetveen the sections with dirt or other oneign legterial.

Another object of this invenon is the provision of an impi'oved expansion joint assembly including a simplihed form of ex- @5 pansible member including a substantially l-shaped laterally expansilole portion and anchoring anges for secuiing the same in place along the adjacent pavement sections.

JAnother object is the provision oi an im- @4B proved expansion joint including en iinproved expansible member in combination with a division plate for supporting the expansihle member and for insuring the dormation of seperate sections oi pavement, and @s ineens ier anchoring the division plates in vertical position during the formation oi the sections.

@ther ohiects and advantages of my invention will appear from the following decg@ scription.

.ln the accompanying drawings,

F ig. l is a vertical sectional view of a portion o a concrete pavement which is provided with an enpansilole joint ci a type in- 7s corporating my invention;

Fig. 2 is a view similar to Fig. l lout shovvingthe adjacent sections of the pavement contracted as in cold weather and drawn avvey trom each other;

f Fig. 3 is a view similar to Eig. l hut disclosing a. slightly modiied form oi my invention;

Fig. 4 is a perspective view oi fragments of my invention shown disassembled' Fig. 5 is a view similar to Fig. 3 showing a slight modification therefrom; Fig. 6 is a view similar to Fig. 1 but illustrating another modification of my invention;

and 90 Fig. 7 is a side elevation of the metal parts shown in Fig. 6.

While in the drawings I have illustrated my invention as applied to a concrete pavement, it will be understood that my invention may ef he utilized in practically all forms of pavement or other monolithic construction which it is desirablek to provide expansion joints hetween portions which are cast or moldedin place for the purpose oi preventing the filling of cracks or spaces therebetween with foreign material.

x In the drawings, numerals 5 and 6 designate adjacent portions of concrete sections of a pavement which abut a division plate 7 extending across the pavement. The expansible member 8 preferably comprises a strip of non-corrosive flexible sheet metal which is `formed with a central portion 9 depressed forming a 'substantially V-shaped corrugation to allow for expansion by partially Hattening as illustrated in Fig. 2. 'lhe member 8 also includes anchoring flanges 11 and 12 extending laterally into the concrete.

Thel V-shaped corrugation or groove 9 expands longitudinally of the flexible strip 8 and is formed with an easy curve 14 at the apex to facilitate repeated bending without cracking of the metal. The diverging sides 15 and 16 of the `V-shaped portion are joined to downwardly extending side members or flanges 17 and 18 at 19 and 20. The lower ends of flanges 17 and 18 are formed integral with the anchoring flanges 11 and 12.

Although the anchoring flanges may be made in various forms, I have illustrated them including return- bent flanges 21 and 22 for engaging the concrete and preventing the withdrawal of the expansion member 8. The division plate 7 not only permits ready separation of the sections of the concrete but supports the expansion strip 8 prior to the pouring of the concrete, it being secured preferably by welding at 25 to the outer side of s aced lugs or flanges 26 struck from the ange 11 and depending from the side flange lor portion 17 best shown in Fig. 4. The upper adjacent corners 27 and 28 of the concrete are preferably rounded 0E to a surface substantially flush with the inner surface of the diverging portions l5 and 16 of the V- shaped groove to protect the corners 19 and 20 and prevent injury to the expansible member by trallic. c

In the normal use of my improved expensibl'e joint, after the concrete has set, a decrease` in temperature causes contraction of the adjacent sections 5 and 6 and they move apart as shown in Fig. 2, making a space 29 which is protected at the top by the V portion 9 in ,which dirt or sand designated at 31 may collect. The bottom portion 14 will rise sulfi- ,ciently to provide for the necessary contraction of the concrete. The space 29 being kelpt clear of foreign matter, it may be again ta en up bythe concrete when the sections again expand and without setting up undue stresses.

In Fig. 3 the division plate extends along the inner side of the portion 17 and is preferably spot welded at 35 above the flange 11. In this construction the depending ilanges 26 of Fig. 1 are eliminated. In Fig. 3 the flanges 11 and 12 have small vertically extending flanges 36 and 37 which help to anchor the ilanges 11 and 12 in the concrete.

In Fig. 5 the division plate also extends upwardly along the inner side of the flange 17 forming a reinforcement for the same, and it is secured at 38 to the depending flanges 26. In this modification the flanges 17 and 18 are shorter than that shown` in Fig. 3, for the purpose of facilitating the welding of the parts together. Theflanges l1 and l2 in this modication are provided with downwardly turned marginal flanges 41 and 42 which are anchored in the concrete sections 5 and 6.

In the modification of my-invention shown in Figs. 6 and 7 the expansible member is substantially like that shown in Fig. 4 and is fixed preferably by welding at 25 to a division plate 43 which has upper and lower vertical portions 44 and 45 and an offset corrugation comprising a vertical portion 46 and inclined portions 47 and 48 connecting it to the vertical portions 44 and 45. The inclined portions or flanges 47 and 48 are provided with apertures through which may be inserted pins 49 for holding the plates in position prior to the pouring of the concrete. The 'pins are placed through the plate 43 only at places adjacent points of attachment of the plate to the flanges 26, to avoid the possibility of the flanges interfering with the driving of the pins.

The plate 43 as illustrated in Fig..7 is arched to conform to the cross contour of a pavement, and the member 8 being flexible is bent to the contour of the upper edge of the plate 43 and welded to the same.

It will be understood by those skilled in the art that modifications may be made without departing from the principle of this invention and I desire to avail myself of such modifications and changes which come Within the scope of the appended claims.

I claim as my invention:

1. A pavement or the like comprising a pair of sections having adjacent edges, means for connecting said sections and preventing filling the spaces between the edges, comprising a flexible sheet metal member having a substantially V-shaped corrugation extending longitudinally of the adjacent edges of the sections, integral anchoring flanges extending into said pavement sections and formed on each side of said V-shaped corrugation, said pavement sections having upper adjacent corners formed with surfaces substantially flush with the inclined surfaces of the V-shaped corrugation, depending flanges on said flexible member, and a division plate fixed thereto and extending downwardly between the adjacent sections of the pavement.

2. A pavement or the like comprising a pair of sections having adjacent edges, means for connecting saidsections and preventing lilling of a space between said edges, comprisso "comprising e enible sheet instel member nevnsveeei ing n llenible sheet motel member including en expsnsible portion end integral anchoring enges termed along each edge endembedded in seid pavement sections, depending Ldsnges on seid exible member 'end e division plete xed thereto end extending downvverdy between the .adjacent sections ot the pevenoent.

3. A pavement or the like comprising e pair of sections heving edjocent edges, ineens tor connecting seid sections and preventing nlling oi e creek between said edges, comprising o enible motel member including en expensible centre-,l portion end laterally extending edges nnchored in seid sections, depending :dnnges on said flexible member, and e division plete permanently lined thereto end enteng downwardly between the edjecent sections of pavement,

Il. A. pavement or the like comprising e poiro sections having adj acent edges, ineens for connecting seid sections and preventing nlling ot e creek between the edges thereof, comprising n ilegible sheet metal member having n substantially lll-sheped depressed corrugation extending longitudinally oi the adjacent edges, integral anchoring ilenges termed lon cach side oi seid corrngetion and extending into seid psvenient sections, end e division plete interposed between seid sections and vbeing permanently Welded to side portion oi seid ilegible member 5. An expensible member ier concrete pavements the lile comprising en integrel sheet motel strip ci enible motorie-l vincluding n substantially l-sheped corrugation extending longitudinally ci seid strip end adopted to expend laterally to permit relative movement between adjacentpoveinent sections, anchoring :dong-es carried by side oi seid corrugated portion be embedded in ediecent concrete sections, end' integral longitudinally spsced lugs carried by one side oi? lll-she eed tion adopted to be secured to e divis I 6. A. pevenient or the lilre comprising ci sections lieving edjecent edges, roes Y ,connecting seid sections end 1oreven'-ng nl;- ing oi n creci-z between the edgfecent ing e substantially V-sheped bend estending longitudinally ci." seid creclr, integredu enchering l ilenges extendingint-o seid pavement sections ond termed on eeclrside cll-shoped bend, and division plete comprising e sheet instel member extending along one side portion of seid. ldenible member seein-ely end permanently lined thereto end depending there'from,a

.A pevenient or the like comprising pair of sections having edjecent edges, ineens for connecting seid sections end preventing tilling or"n e creek between the edjecent edges, eompriscng e @crible sheet instel niereber heving snbstentiedly il-shoped bend extending longitudinally of seid creek, integral anchoring flanges extending into said pavement sections end formed on eech side oiseid l-sheped bend, end e, division plete comprising e sheet instel member extending along one side portion oi said dexible member ond securely end permanently xed thereto end depending therefrom, seid division plete including e longitudinal corrugstion having vertically aligned perioretions therein ier the reception oft anchoring pins.,

8. A peveneent or the like comprising n pair of sections having adjacent edges, mee-ns tor connecting seid sections and preventing lling oi e creclr between the edj scent edges, comprising e iiexible sheet metal member having e substantially V-shoped bend entending longitudinally ot said crack, integral anchoring iienges extending into seid povement sections and formed on each side oi seid ll-shaped bend, end s. division plat/e comprising e sheet metal member including e portion extending vertically from one oi seid anchoring enges to one edge ci seid ll-sheped portion end secured to e side portion oi:a the denible member -:tor reinforcing the seme.

9. A pavement or-the like comprising e peir oi sections having adjacent edges, means for connecting seid sections end preventing filling oi e, creclr between seid edges, coniprising e flexible motel member including en enpensible central portion end laterally entending edges snchored in seid sections, depending den-ges on seid eXibl-e member, and e division plete permanently lined thereto end extending downwardly between the odi ecent sections of the pavement, seid division inclnding e longitudinal corrngetion 'loving vertically aligned perioretions therein for the reception ci? anchoring pins1 lll, el pavementor the like comprising s ci sections heving ecent edges, ineens :tor connecting seid sections and preventing lling ci n crock betvveen edges thereof, coi prising iiercible sheet metal member snbstentielly Yl-sboped depressed coirngetion extending longitndinelly ol the adjacent edges, integral anchoring rlsnges "forme-d on eecli side of seid corrngeticns end extending into seid pavement sections, ond division interposed between, seid sections end permanently welded to e, side portion oi seid crible member, seid division plete including s longitndinnl corrngetion linving vertically sligned perioretions therein for the reception oir anchoring pins A pavement or the lilre comprising e peir oi pavement sections supported upon the snbsoil end lioving edjecent edges, seid sections bein formed ot portions of concrete plsced edyecent each other with en expensible sheet metel member having e derrible central portion .end having o pnir oil enchering pontions embedded lll@ leo

lil@

` www1 in the concrete of bhe sections en@ enehmed therein, said expensible member having downwardly extending Hem es and e division plate welded to .seid 'ownwedy extending flanges and adapted te form a divis'ion between said sections to permit movement between said sections.k

In witness whereof, I hereunto subscribe my name this 24th day of December, 1930.

GLEHFURDGLDER.

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