US 3685783 A
A form in which concrete, or an equivalent moldable material, is poured to provide a finished product. A panel or wall portion of the form or mold is equipped with means for distributively positioning and embedding hollow sleeve-like anchors or fittings. Each means or device embodies a plastic or an equivalent insert or dowel over which the anchor or fitting is sleeved and temporarily held in a manner that it can be embedded at the desired locale in the finished product. After the poured material hardens, adapter means-which constitutes a lower disposable component part of the dowel-is broken off at a frangible or preweakened point. The finished product with the dowel-sealed-anchors is freed for shipment. The adapter stays put in the form until it is subsequently dislodged and discarded.
Description (OCR text may contain errors)
United States Patent Hilson INSERT FOR EMBEDDED FITTINGS Inventor: Eugene R. Hilson, Miami, Fla.
Assignee: Maule Industries, Inc., Miami, Fla.
Filed: May 21, 1970 Appl. No.: 39,207
US. Cl. ..249/94, 85/1, 238/377, 249/86, 249/97 Int. Cl. ..B28b 7/ 16 Field of Search ..238/371., 373, 377; 249/83, 249/96, 97, 86, 205, 41, 94; 18/D1G. 10; 52/585, 704, 699; 25/D1G. 9, BIG. 7, 131 V,
References Cited UNITED STATES PATENTS 1/1971 Kowell ..264/275 1] 1945 Haskell ..'.'.249/91 X 6/ 1965 Dudley ..249/4l 12/1902 Luyben ..249/214 3/1970 Erhart ..249/97 X 10/ 1 969 Bormann ..249/ 86 X 11 1 3,685,783 1 Aug. 22, 1972 3,418,781 12/1968 Penote ..52/699 Primary Examiner-J. Spencer Overholser Assistant Examiner-Ben D. Tobor Attorney-Clarence A. O'Brien and Harvey B. Jacobson 1571 nswer A form in which concrete, or an equivalent moldable material, is poured to provide a finished product. A panel or wall portion of the form or mold is equipped with means for distributively positioning and embedding hollow sleeve-like anchors or fittings. Each means or device embodies a plastic or an equivalent insert or dowel over which the anchor or fitting is sleeved and temporarily held in a manner that it can be embedded at the desired locale in the finished product. After the poured material hardens, adapter meanswhich constitutes a lower disposable component part of the dowel-is broken off at a frangible or preweakened point. The finished product with'the dowel-'sealed-anchors is freed for shipment. The adapter stays put in the form until it is subsequently dislodged and discarded.
' 5 Clains, 5 Drawing Figures Form PATENTED 1972 E ugene R Hi/son INVENTOR.
I 1;)" Wm and Anamqs :j' D/Scarded Adapter INSERT FOR EMBEDDED FITTINGS This invention relates to certain new and useful improvements in molds and forms which are designed and anchors or equivalent fittings and the means which is provided and relied upon to hold the same in place in the mold in which the liquid concrete, or other moldable material, has been pouredto form the transportable ready-to-use product. This dowel has a novelly constructed lower end which is herein designated as adapter means. After the moldable material hardens and sets,'the adapter means, which has a pressure responsive frangible or pre-weakened neck', is broken off and thefinished product with the embedded and dowel-sealed anchors is then readied for handling, shipment and use. a
Another aspect of the invention pertains, also briefly stated, to a mold which is characterized by a form embodying a wall which has spaced parallel flat faces and, for purposes of this disclosure, is implemented with at least one screw-threaded hole which opens through the respective flat faces. A precast slab resides and is supported atop one flat face and has an open-ended internally screw-threaded anchor or fitting embedded therein and aligned with the hole. To achieve the improved result desired, the aforementioned positioning insert or dowel comes into play, that is, the dowel proper is telescopingly screwed or threaded into the anchor in such a manner that the boreof the anchor is plugged and thus protectively sealed. The frangible adapter means is broken off after which the finished product is freed and readied for shipment.
In carrying out the principles of the invention, and as will be hereinafter more fully comprehended, it will be understood that a highly significant feature pertains to positioning of metal anchors or equivalent fittings in the mold and the release of the' embedded anchor or fitting by forcibly breaking the pre-weakened adapter means. Then, too, novelty is predicted on using a new dowel in a manner to replace the fractured disposable part of the old dowel in one operation andalso the idea of sealing and protecting the threads in the anchor or other fitting that has already been embedded in the aforementioned finished product.
These together with other objects and advantages which will become subsequently apparent reside in the details of construction and operation as more fully I hereinafter described and claimed, reference being had to the accompanying drawings forming a part hereof, wherein like numerals refer to like parts throughout, and in which: I
FIG. 1 is a fragmentary view with parts in section and elevation showing a part of the mold or form, the finished product with the flanged anchor or fitting embedded therein and the plastic or equivalent insert or dowel threaded into the anchor and also breakably and separably connected with the form.
FIG. 2 is a view similar to and based on FIG. I and which shows the same combination of parts but with the form and adapter means, the latter being broken off and the finished product readied for shipment.
FIG. 3 is an enlarged sectional view of the novel positioning, setting and retaining insert or dowel in its intact ready-to-function state.
FIG. 4 is a view which shows a fragmentary portion of the form or mold and with a new dowel being screwed into the screw-threaded hole and the old" adapter means being dislodged for disposition.
And FIG. 5 is an exploded perspective view showing the adapter means forming the lower end of a new dowel with the adapter means of the old dowel broken off but fragmentarily shown.
By way of introduction to the detailed description, it should be pointed out that the disclosure, broadly stated, comprehends molding and manufacturing of a finished or ready-to-use concrete or an equivalent block, slab, concrete railroad tie or an equivalent module. It pertains to, as suggested, the form or mold and wherein the part of the form which is involved'is equipped with a plastic or an equivalent insert or dowel over which an anchor or fitting is'sleeved and in this manner held for desired anchorage in the finished 1 product. It will perhaps simplify the presentation to designate the finished product as a precast concrete railroad tie. It follows that in FIGS. 1 and 2 the. finished product or tiev is denoted by the numeral 6. The mold or form is denoted, that is the essential part, by the numeral 8. The form has spaced parallel flat surfaces 10 and 12 and is of requisite material and stability. The surface 10 provides a base or support for the coacting surface of the tie 6, of the finished product 6. The surface which may be here referred to as the bottom surface in FIG. 2, is denoted by the numeral 14 and is separable from the mold surface 10 when the product is readied for. handling, shipment and subsequent use.
More specifically the part 8 of the form is provided, in actual practice, with a plurality of prescribed screwthreaded holes. For simplicity, a single hole is shown at material in any suitable manner. 'Also in actual practice this anchor is internally screw-threaded and, assuming that the finished product 6 takes .the form of a concrete slab or the like, the anchor serves as hold-down means for a bolt-such as is commonly employed to secure a structuralmember atop the concrete base (not illustrated).
In addition to the concrete member 6, the form 8, the flanged anchor or fitting 18 which is embedded in said member 6, the dowel, that is the plastic dowel, is of the utmost in importance in that it is susceptible of use in holding the anchor or fitting in place in the mold in which the liquid concrete, or other moldable material, is poured to form the transportable ready-to-use product. With reference toFIG. 3, the intact positioning, setting and retaining dowel is denotedv by the reference character A and for disclosure purposes here is differentiated from the correspondingly constructed dowel B. Both dowels A and B are the same in construction and like reference characters are employed to designate like parts. The elongated dowel proper is denoted by the numeral 24. and has a flat upper end,
a '38 of proportional dimension the lower end of which is provided with a socket member 40 which in effect serves as a socket wrench when e rnployedj'in the manner illustrated in FIG. 4.
1 In use the adapter 38 is screwed'and plugged into the I screw-threaded hole 16 in the form 8 in the manner illustrated in FIG. 1. The dowel: 24 extends at right angles beyond the surface 10.. -The' fitting or'sleeve-type anchor .18 is sleeved over the dowel 24 after which the i liquidconcrete -is poured and during which time the plastic-dowel is used to positionandset the anchor or other fitting and to hold it in in the mold in which the concreteor other liquid material-6 ispoured and placed to ultimately forrn'thefinished product. After weakened or frangible joint or point 36, that is, when the step in FIG. 2 has been satisfactorily accomplished.
The manner in which the fracture can take place may varyin actual practice. It should be-noted that the adapter means. 32 has an axial. bore passing therethrough and'is accordingly hollow. This bore is conveniently denoted by thenumeral 42 and it is in line with a'sirnilar socket or bore 44 which is formed in the dowel proper, and which serves in actual practice to accommodate a tool (not shown) when it is desired to unscrew and remove the dowel from the anchor or fitting,
that is after dowel has served itsthread-protecting P It is reiterated that after the concrete or other liquid material has hardened the finished product with the anchor or other fitting and the dowel are'removed for shipment. The aforementioned adapter means 32, also designated as the lower portion of the dowel, remains piece plastic unit (designated as-an insert or dowel in FIG. 3) well serves the purposes for which it has been perfected.
, It is to be understood that the length of the anchor is not to-be construed as comparably limited to the depth of the poured concrete in which it isembedded. This is to say, an anchor 2'inches in length could, manifestly,
beembedded in a concrete slabwhich is :3 inches, more or less, in depth or thickness.
The foregoing is considered as illustrative only of the principles of the invention. Further, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the invention to the exact construction and operation shown and described, and accordingly all suitable modifications.
and equivalents maybe resorted to, falling within the scope of theinventionasclaimed. i
What is claimed as new is as follows:
4 Foruse in conjunctionv m an open-ended screwthreaded prescribed hole in a predetermined wall of a t the material is hardened the lower adapter means 32 on the dowel is intentionally. broken off at the pre in the form in the screw-threaded hole 16 in the a manner illustrated in FIG. 2.
As is believed to be evident now from FIGS. 4 and 5, the so-called new dowel B is brought into play and is screwedinto the hole 16 so that the socket member 40 thereof is sleeved or fitted over the neck 34 of the ol dowel which dislodges and causes the same to be ejected in-the manner shown in-full and phantom lines in FIG. 4. This is believed, to be a novel manner orstep of positioning the new plastic dowel B in the mold in a.
timeand labor saving manner. 1 r
A significant aspect of the invention is that which will enable one to expedite the manufacture, for example, of a concrete'railroad tie and which has to do with positioning, setting and retaining a hollow internally screwthreaded fitting, a screw-threaded metal anchor for ex- 7 I ample, in its predetermined embedded position in the finished product. With a view-toward turning out the finished product achieving the improved end result desired,iexperience' has shown that the unique one concretev mold:; a positioning, setting and'retaining device for a hollow internally screw-threadedfitting of a predetermined type designed'and adapted to be embedded in a manner to serve as a bolt-holding anchor, said device comprising, a one'piece plastic unit em- 'bodying an elongated externally screw-threaded dowel closed atone end and having an outstanding in-' tegral wall abutting flange at its other end, said dowel being provided with an elongated axially located non-.
circular bore closed at said one end and open at said other end and providing a readily accessible hand-tool .receiving dowel turning socket'capable of permitting the dowel to be unscrewed and bodily removed from said fitting when necessary or desired, and complemental adapter means integral with said other end and pro-,
jectingaxially beyond other, end and said flange and embodying a reduced externally screw-threaded plug-like adapter which has an axial bore alignedwith said first-named bore and is capable of being aligned with and screwed into the aforementioned screwthreaded hole.
2. The positioning, setting and retaining device defined in and according to claim 1, and wherein said adapter means is provided at said flanged end with a,
reducedhollow. flangible pressure responsive neck, said neck being interposed between said flanged end and plug-like adapter and having a lower end axially aligned I with and integrally united with a contiguous upper end of said plug-like adapter and an upper end united with said flanged end.
3. The positioning, setting and retaining device defined in and according to claim 2, and wherein the bore of said plug-like adapter has its bore axially aligned with the hollow portion of said neck. t
4. The positioning, setting andv retaining device defined in and according to claim 3, andwherein neck and plug-like adapter are cooperatively unified,
said plug-like adapter being cylindrical in cross-section, and said neck being non-circular and of a cross-see tional dimension appreciably smaller than the crosssection of saidplug-like adapter. t
5. The positioning, setting and retaining device defined in andaccording to claim 4,and wherein-said plug-like adapter has a leading end provided with an integral reduced socket member projecting axially beyond said leading end and which, when brought into use, constitutes a conveniently usable socket wrench.