US2453434A - Tie for concrete wall forms - Google Patents

Description

Nov. 9, 1948. w. D. HARDER TIE FOR CONCRETE WALL FORMS Filed June 25, 1947 INVENTOR. v w. D. HARDER 2/??? fer to corresponding parts throughout the several views:

Patented Nov. 9, 1948 UNITED STATES PATENT oer- 1cc William D. Harder, Chicago, 111. Application June 25, 1947, Serial No. 756,961

The present invention relates to a tie for concrete wall forms. In the art of building concrete walls, first a pair of spaced wall forms are erected, the latter consisting of a plurality of panels laid in an edge to edge relation. For the purpose of holding a pair of erected wall forms in a proper spaced, rigid relation ties are employed, which by their ends are rigidly afiixed to the opposing panels and in a transverse relation with the space defined by the two wall forms into which cement mixture is poured. When the ocment mixture has solidified the panels are disconnected from the ends of the ties and the former are then removed from the finished concrete wall. Usually such ties areleft in the concrete wall.

The principal object of the present invention is the provision of a tie for the purpose above indicated consisting of a tubular 'body portion with the solid end portions extending therefrom, the latter, on completion of a concrete wall being removable from said tubular body portion, thereby savin material.

Another object of the present invention is the provision of a tie of the type above indicated,

wherein the end portions thereof may be rigidly connected to the tubular portion thereof, and which on completion of a concrete wall and on re moval of the panels aforesaid may be disconnected from said tubular portion of the tie and removed therefrom by an exceedingly simple op--' oration.

A still further object of the present invention is the provision of comparatively simple connecting meansbetween the tubular body portion of the tie of the type hereinabove indicated and the solid end portion thereof, whereby on application of force to said solid end portions of the tie the said connecting means may be rendered inoperative for the pur ose of removing said end por tions from said tubular body portion of the tie.

A still further object of the present invention is the provision of a method ior connecting of an oblong solid piece of material with a tubular holder within which. the former is insertable.

With the above general objects in view and others that will appear as the invention isbetter understood, the same consists in the novel construction, combination and arrangement of parts hereinafter more fully described, illustrated in the accompanying drawing and pointed out in the appended claims.

In the drawing forming a part of this application and in which like designating characters re- 3 Claims. (Cl. 287-409) 2 Fig. 1 is a face elevational view, partly broken away, of the tie constituting the present invention, showing the tubular body portionthereof in an operative position with relation to the end portions thereof;

Fig. 2 is a similar view with the end portions of the tie driven inwardly into the tubular portion thereof, after the rigid connection therebetween has been severed, preparatory to the removal of the end portions from the tubular portion, of the tie;

Fig. 3 is a face elevational view of one end of the tie;

Fig. 4 is a face elevational view of one end portion of the tie; and

Fig. 5 is an enlarged cross-sectional View on line 5-5 of Fig. 3.

Referring in detail to the present drawing there is shown a tie including the tubular portion or sleeve l0 thereof. Said sleeve in is of a fiat formation, including a pair of opposed wider walls, and a pair of narrower edge walls, as is clearly seen in "Fig. 5. Cooperating with each end of sleeve I0 and insertable therewithin, is a solid portion of the tie or tongue H. When tongues H-are in an operative position with relation to sleeve ID, as shown in Fig. 1, the tie is readyfor use in the construction of concrete walls. In such use sleeve it will remain in the space defined by a pair of opposed form walls between which cement mixture is poured, with said sleeve Hi ultimately remaining embedded in the concrete wall when built. Tongues l l extend between the panels outwardly of the space defined by a pair of 4 panel form walls, and are rigidly afilxed to the panels for maintaining the two form walls in a rigid spaced relation. When the concrete 'wall has been made. the panels are thereupon discon-- nected from tongues H and the latter are thereupon disconnected from sleeve ill and removed therefrom.

The outer end of each tongue I i may be arcuate and provided with aperture [2 by means of which the tongue rnay be rigidly affixed to the panels. The inner end of each tongue ii, and

on each edge thereof, is provided with a plurality of opposed teeth l3. These teeth are struck out in tongue ll. Each toothllt has a straight face M, which is in a perpendicular relation with the longitudinal axis of tongue H, and an inclined face E5. the outer end of which in conjunction with said straight face ltdefines sharp point 86 r of the tooth.

The inner end of each inclined face 95 is in the nearest proximity of the longitudinal center of tongue H, and away from the free end of tongue H at which aperture I2 is located. Each pair of adjacent teeth I3 at each edge of tongue H is spaced by straight wall IT. The several walls I! are disposed on a continuing plane in parallelism with the edges of tongue H but removed therefrom towards the center of the tongue. It will be therefore seen that the wider transverse edge of each tooth I3 is nearest to the free end of tongue H, while the narrower portion of each tooth I3 is farthest from the 'free end of'sai'd tongue. Except for spacing walls I! between teeth l3, the latter in all respects are identical with teeth in a ripsaw.

When the toothed end of each tongue II is inserted within the end of sleeve I 0;thereupon by a suitabe machine or tool crimpingis imparted to the opposed. edges of sleeve l0 and adjacent said teeth l3 for efiecting interlockingbetween sleeve Ill and teeth l3. This crimping includes "tearing of sleeve it transversely thereof and along theplan'e of faces Min a pair o'f opposed teeth l3, as at 18. This-action results in an indent I9, which is pressed'towards the longitudinal center of sleeve l0 and tongue l 1, until the same is brought in c'ontact'withinclined face 15 :of each tooth l3, and until the free end of each :indent l9 reposes within the corner defined by fac'e M and wall I1 in each tooth I3. By virtue of this action indents l9 :are interlocked with teeth IS in a rigid manner, with indents l9 forming'ftran'sverseobstructions for teeth 13, so that no reasonable degree or pull upon tongues H in the direction oftheir free ends will be able to disconnect or withdraw tongueH:.from-sleeve H).

The interlockingbetweentongues H andsleeve 10, resulting from teeth l3 and indents "l9, re-

spectively, will be sufficient to withstand all stresses 'upon the tie for maintaininga pair of spaced form walls when under pressure of cement mixture poure'd therebetween-while building a concrete wall.

When aconcrete wall has solidified-and the panels are disconnected from tongues H and removed from a concrete wall builtthe removal of tongues H from'sleeve Ilhis a comparatively simple matter, To accomplish this obiect, all that-is required isapplication of force at the free ends of "tongues H, as by hammer or a like instrument, for driving tongues l i and sliding them 1-.-

iinwardl-y of sleeve it. This action causes inclin-edfaces IE to ride upon the'contactin'g faces :of indents lQ-for-fo'rcing the latter towards the ed'gelines of sleeve Hi and away from teeth l3 to substantially assume the continuing perimeter I of sleeve In, as'is seen in 'Fig. 2. When this was accomplished, with-indents H9 out of the path of teeth l'3or'of their straight faces 14, the entire "tongue H may "then be removed bodily from sleeve l9 'bypulling tongue H in the opposite direction, that is towards its free end. The tongue thus 'rem'ovedmay be reusedmanytimes, or if preferred the sainemay be'completely driven into sleeve H! as is shown at the upper end of the tie in Fig. 2. The removal of tongues H from "S16Ve"| ii is predicated-upon sleeve Hlrernaining permanently embedded "within a concrete wall when the latter has been made. Otherwisawhen sleeve id is wrapped in-apaper lining, the same -may be bodily removed from the-solidified conicrete wall, by exerting pulling force upon one'of tongues H, but in that'lattereven't no preliminary driving of tongue ll into sleevelll should be resortedto, because such driving of tongue ll in-to sleeve it would cause deflection 10f indents H! from teeth I3 and consequent severance of connection between tongues l l and sleeve Ill.

The solidified concrete around indents l9 will be no obstacle for deflectin the same outwardly and away from teeth l3 when tongue I I is driven inwardly of sleeve 18, because force of sufficient degree applied at tongue H to so drive the same will cause compaction of the surrounding concrete for permitting the deflection of said indents While there is described herein a "preferred embodiment of the present invention, it is nevertheless to be understood that minor changes may be made therein without departing from the spirit and scope of the invention as claimed,

What Iclaim as new is:

1. A tie of the class described comprising a hollow member, an extensible member receivable within the end of said hollow member in a longitudinal coaxial relation therewith, said extensible member beingprovided with a transversenotch, and a crimp madein said hollow member, said crimp entering said notch for rigidly retaining saidextensible member within said hollow membenon application of force'for shifting said ex 'tensible member within saidhollow membersaid crimp being adapted for deflection from said notch for severing the engagement betweensaid :hollow member and said extensible member pre- .,paratory'to the withdrawal of thelatter from the ,forrner. I

2,.A tie of the class described oomprisinga hol low member, said hollow member being subzstantially of a rectangular formation on 'transverse cross-section, an oblong fiat tongue fitted withinthe end of said hollow member, a plurality of teeth struck out at the opposed edges of -said-tongue adjacent the inner end thereof, said of force to said extensible member for shifting the same within said hollow member, said 'inadents being deflected by said teeth from within said notches for severing the engagement between .said hollow member and saidextensible member .preparatory to the withdrawal'of the latter from the former.

3. A tie of the class described comprising a hollow member, said hollow member being substantially of "a rectangular formation on transverse cross-section, an oblong fiat tongue receivable within theend of sai d-ho1low member a plurality of teeth struck out'in the opposed edges of said tongue, each of said teeth having a face ion a plane substantially transverse with relation "to said tongue, and a face on an incline withrelation to the longitudinal axis of said tongue, the

first named-face oi -each tooth being=in the nearest proximity to the outer free end of said tongue,

the second named face of each tooth being farther removed from the outer free end of said tongue,

said faces in the pairs ofadjacent teeth defining notches, and a plurality of indents made in'the opposed-edges of "said hollow membensaid indents-entering saidn'otches, said notches bearing against the said firstnamed faces of saidteeth :for preventing the shifting movement of said tongue in the direction away from the center of said hollowmember, on shifting of saidtongue toward .the center of said hollow member "said :second namedfaces-ofsa-id teeth riding upcn said indents for deflecting the latter from within'naid notches preparatory to the withdrawal of said tongue from said hollow member.

UNITED STATES PATENTS WILLIAM D. HARDER. Nu ber Name Date 59,007 Gridley 001;. 23, 1866 E 5 186,675 Hanson Jan, 30, 1877 R FERENCES CITED 1,003,907 Hofiman Sept. 19, 1911 The following references are of record in the 1797691 Mernu 1931 fi of p t t: MacChesney NOV. 28,

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