Anchor stud holding assembly for concrete forms

March 31, 1970 a. f. erhart etal 3,503,584

ANCHOR STUD HOLDING ASSEMBLY FOR CONCRETE FORMS

<img file="US3503584A_D0001.tif" />

FIG. 3

FIG. 4

INVENTOR.

AUGUSTUS F. ERHART

V ATTORNEY

March 31, 1970 a. f. erhart et al 3,503,584

ANCHOR STUD HOLDING ASSEMBLY FOR CONCRETE FORMS

<img file="US3503584A_D0002.tif" />

FIG.

<img file="US3503584A_D0003.tif" />

<img file="US3503584A_D0004.tif" />

3,503,584

Patented Mar. 31, 1970

United States Patent Office

3,503,584 ANCHOR STUD HOLDING ASSEMBLY FOR CONCRETE FORMS

Allan F. Erhart, Rte. 4, Box 193, Port Orchard, Wash. 98366, and Augustus F. Erhart, deceased, late of Port- 5 land, Oreg., by Anina G. Erhart, administratrix, 5715 N. Maryland, Portland, Oreg. 97217 Continuation-in-part of application Ser. No. 445,099,

Apr. 2, 1965. This application May 1, 1967, Ser.

No. 648,178

Int. Cl. E04g 21/12; B28b 23/00; F16b 37/04 1»

U.S. Cl. 249—205 9 Claims

ABSTRACT OF THE DISCLOSURE

Ths invention includes an anchor stud holding assembly designed to be attached to concrete forms for holding an anchor stud in place while the concrete wall is being formed. The assembly has a holder arranged to be frictionally but removably engaged in an aperture in the ₂θ concrete form and having a central bore frictionally holding an anchor stud therein. The portion of the anchor stud to be embedded in the concrete projects from the holder. The assembly also includes a plug for filling the hole in the form after the holder has been removed, and further includes a wrench for installing and removing the holder.

This application comprises a continuation-in-part of application Ser. No. 445,099 filed Apr. 2, 1965 for Con- 30 crete Form Stud Holding Device.

This invention relates to new and novel anchor stud holding assemblies for concrete forms.

It is the practice when pouring foundations or walls to embed anchor studs therein, such as stud bolts, and 35 allow a portion of the anchor stud to project out of the concrete for anchoring frame pieces to the foundation or wall. Forms now in use are mostly constructed of lumber or wood sheets such as plywood, and no satisfactory holding devices for the anchor studs, as far as 40 east and simplicity of use and economy of manufacture are concerned, have heretofore been devices. In some cases, anchor studs are attached to concrete walls by drilling holes in the wall after the concrete has set up, but such manner of installation often leads to fracture 45 of the concrete and obviously cannot achieve the fixed positioning accomplished by embedding the anchor stud in the concrete at the time the latter is poured.

Accordingly, objectives of the present invention are to provide an anchor stud holding assembly which is sim- ₅₀pie in construction, economical to manufacture, and easy to use; which is removably attachable to a wooden form and arranged to frictionally hold an anchor stud in a position such that a portion of the stud is capable of being embedded in the concrete; which has novel means 55 for engaging the forms for rapid attachment and detachment; which includes a plug for filling a hole in the forms originally made for removably receiving the holder; and which includes a novel wrench structure associated with the holder for inserting and removing said holder from θθ the forms.

FIGURE 1 is a longitudinal, sectional view taken centrally through a first form of anchor stud holder of the present invention and showing such holder in an installed position in a concrete form; g5

FIGURE 2 is a side elevational view of the holder of FIGURE 1;

FIGURE 3 is an end view taken on the line 3—3 of FIGURE 2;

FIGURE 4 is a cross sectional view taken on the line „ 4—4 of FIGURE 2;

FIGURE 5 is a longitudinal, sectional view of a sec- ond form of anchor stud holder, taken on the line 5—5 of FIGURE 8;

FIGURE 6 is a fragmentary, longitudinal sectional view of one end portion of the holder of FIGURE 5 and showing anchor stud holding means at such end portion;

FIGURE 7 is a side elevational view of the holder of FIGURE 5;

FIGURE 8 is an end elevational view of the holder of FIGURE 5; taken on the line 8—8 of said latter figure;

FIGURE 9 is a foreshortened, elevational view, partly broken away, of a wrench for installing and removing the holder of FIGURE 5;

FIGURE 10 is an end elevational view of the wrench, taken on the line 10—10 of FIGURE 9; and

FIGURE 11 is a side elevational view of a plug member used to seal a hole in the forms formerly used by the holder to set an anchor stud.

Referring first to FIGURE 1, there is shown in fragmentary section a sheet-type form 10 which is in common use to confine concrete in the formation of walls 12 or the like. In the formation of such concrete structures, anchor studs 14, such as stud bolts, are embedded in the concrete with a shank portion 16, usually threaded, projecting from the surface of the wall 12 for anchoring structural members thereto.

According to the present invention there is provided an assembly which includes a holder as one part thereof adapted to hold an anchor stud in place on the form while the concrete wall is being formed. A first embodiment of the holder is shown in FIGURES 1-4, and comprises generally a 'body member 18 having opposite end portions 20 and 22 and an annular flange 23 intermediate these end portions. The body member 18 has a central, longitudinal bore or opening 24 to receive the shank portion 16 of the anchor stud 14. It is desired that the shank portion have a substantially tight frictional grip in a portion of the bore 24, and for this purpose the bore at the end portion 20 of the body member has longitudinally extending ribs or projections 26 for accomplishing the said frictional grip on the stud. Any number of ribs 26 may be provided, such as four as illustrated in FIGURE 3. The ribs of course may extend the full length of the bore 24 but such may not be necessary since it is only required that a sufficient grip be obtained on the stud 14 in the end portion 20 to hold it securely in place while the concrete is being poured and worked.

The end portion 20 of the body member 18 is adapted to be removably fitted in an aperture 27 provided in the form 10, and when installed, the inner end thereof acts as a substantially continuous molding surface with the molding surface of the forms. The aperture 27 has a selected diameter so as to tightly receive this end portion of the body member in a frictional engagement and insure a positive, set position of the body member in the form Preferably, the outer surface of the end portion 20 has annular serrations or teeth 28 to provide the grip desired on the inner surface of the aperture 27. These serrations are angled away from the concrete area to provide a locking grip in the one direction.

The end portion 22 of the mounting device has external, longitudinally extending reinforcing ribs 30. This end portion also has a longitudinal slot 32, and marked on the outer surface of this end portion adjacent the slot are reference means 34 such as recesses, projections, or the like. These reference means are identified by indicia 34α which indicates the distance between the end edge of portion 20 and the reference means 34, whereby to designate the distance that the stud will project from the concrete. As an example, if the stud is inserted a distance in the body member such that its inner end edge is located at the projection designated as 1 it is

3,503,584 then known that the stud will project one inch from the face of the poured concrete wall when the forms are removed.

In a preferred construction the end portion 20 of body member 18 is cut longitudinally along a diametral line 36, best seen in FIGURE 3, such cut extending from the snd of the body portion 20 to the far side of the annular lange 23. By means of this split construction it is apparent that the end portion 20 can open up or expand slightly to freely receive the shank end of the anchor stud prior to installation in the form. This end portion tf the body member will contract when forced into the tiole 27 to tightly grip the stud.

In the use of the present holder, apertures 27 are first provided in the form 10 at those places where anchor studs are to be located. These apertures have a diameter slightly less than the overall diameter of the serrated por:ion 28 so that the serrated portions of the holders will tave a substantially tight fit in the apertures 27. Before hserting the body portion 20 into an aperture 27, a stud 14 is inserted in the bore 24 to the selected depth and then the body member is forced into the apertures 27 to a point where the flange 23 abuts against the front surface of the form. It is necessary that the holder have a good frictional grip in the aperture 27, such being iccomplished by the dimensional relationships of the apertures 27 and the end portions 20. It is desired that the beads of studs 14 be smaller than the apertures 27 so ihat the studs can be installed in the holders prior to installation of the latter in the forms.

After the wall has been poured, the forms 10' are removed, and as these forms are removed the holders 18 nove therewith and disengage themselves from the proecting ends of the studs, the studs remaining set in the :oncrete. If it is necessary to remove the stud mounting levices 18 from the forms, such can be accomplished by manipulating them back and forth laterally while at the same time pulling them outwardly from the face of the :orm.

The device is preferably constructed of a semi-resilient material, such as polyethylene plastic to obtain a good ’rictional grip on the forms as well as on the anchor ituds. The holder is sufficiently rigid, however, to adeluately support the anchor stud while the concrete is jeing poured.

FIGURES 5 through 8 show a second form of the lolder. This embodiment includes a body member 18α laving opposite end portions 20α and 22α. It has an innular flange 23α and a central longitudinal bore 24α. inch bore is reduced in diameter in the end portion 20α, iesignated by the numeral 38, and furthermore has an innular sharpened projection 40 adjacent the other end &gt;f the holder which is adapted to grip an end of the mchor stud, provided of course that the stud is of sufficient ength to project that far into the holder. The projection 10 is angled toward the outer end of the holder to provide a lock-type grip on the anchor stud in the one direcion. The diameter of the portion 38 is substantially the ame as the anchor stud or slightly smaller, and the proection 40 has an internal diameter slightly smaller than he portion 38, so that it is expanded somewhat by the inchor stud. Thus, the anchor stud is frictionally gripped ly the bore portion 38 and if long enough by the harpened projection 40. FIGURE 5 illustrates an anchor tud mounted in the holder and FIGURE 6 illustrates the lormal condition of the projection 40, with the anchor tud being shown in phantom lines. The end portion 20α s provided with at least two diametrally aligned slots or uts 36α which allow expansion of such end portion and onsequently easy insertion of the anchor studs into the (older. When the holder is installed in the form, howver, the end portion contracts to firmly grip the anchor tud.

The outer peripheral surface of end portion 20α is pro'ided with screw threads 28α which provide a good grip between the holder and the form and which also serve the improved function that the holder can be inserted in or removed from the aperture 27 by rotation.

The end portion 22α adjacent the flange 23α has a head 42 for receiving a wrench to turn the holder. For purposes of illustration, the head 42 is shown as having a square shape, FIGURE 8. Leading rearwardly from the head 42 at its corners are external, longitudinally extending reinforcing ribs 30α. The holder is further reinforced at its outer end by a thickened ring or band 44.

Also associated with the present assembly, FIGURES 9 and 10, is a wrench 48 intended for use with the holder of FIGURE 5 to install and remove such holder. This wrench comprises a hollow socket-like structure having a wall 50 at one end provided with an outer projection or boss 52. This boss has a non-round aperture or socket 54 for receiving the drive spindle of a turning handle. The opposite end of the wrench from the wall 50 has an opening 56 the shape and dimension of which corresponds to the shape and dimension of the head 42. The wrench is adapted to be fitted over the end portion 22α of the holder 18α, as seen in phantom in FIGURE 7, for engagement of the opening 56 with the head 42. For installing the holder in an aperture 27, it can either be forced directly into the aperture by first fitting the wrench 48 thereon and then applying hammer blows to the boss 52 or it can be rotated into the aperture also by using such wrench. The holder is removed from the forms by retracting rotation.

Also forming a part of the present invention, FIGURE 11, is a plug 58 dimensioned to be received in an aperture 27 in the form for the purpose of plugging the holes originally made for the holders in order that the form can be reused. This plug has annular serrations 60 to provide a locking grip in the apertures 27.

The forms of the invention herein shown and described are to be taken as preferred examples of the invention and it is to be understood that the invention may take still other forms. Although the invention is illustrated and described in connection with the formation of concrete walls, it may be used in any case where an anchor stud is to be held in a fixed position for embedding a portion thereof in a wall to be poured.