US3453796A

US3453796A - Carrier for concrete castings

Info

Publication number: US3453796A
Application number: US667603A
Authority: US
Inventors: Siegfried Gutmann
Original assignee: Individual
Current assignee: Individual
Priority date: 1966-09-17
Filing date: 1967-09-13
Publication date: 1969-07-08
Anticipated expiration: 1986-07-08

Description

July 8, 1969 s. GUTMANN CARRIER FOR CONCRETE CASTINGS Filed Sept. 15, 1967 N N A M l U c D E R F G E S INVENTOR. mm

ATTORNE United States Patent 3,453,796 CARRIER FOR CONCRETE CASTINGS Siegfried Gutmann, 45, Schwarzwaldstrasse, 76 Olfenburg, Baden, Germany Filed Sept. 13, 1967, Ser. No. 667,603 Claims priority, applicatigrsl gesrmany, Sept. 17, 1966,

Int. Cl. E04b 1/41; E04c 5/16 US. Cl. 52-704 5 Claims ABSTRACT OF THE DISCLOSURE The present invention relates to a carrier for concrete castings, and particularly to transport pre-cast concrete slabs or blocks to an erection site.

Transport sockets for pre-cast concrete structures are known in which support wires or support rods are welded thereto. The maximum carrying capacity of such carriers is determined by the rods or other parts welded thereon and providing for load distribution. If concrete structures of widely varying loads are to be transported, a large number of such carriers have to be maintained in stock in order to avoid wastage of material and to match the carrying capacity to the weight of the concrete structures to be transported.

It is desirable to provide universally useful transport holders, which can readily be matched to the weight of the articles to be carried. In one construction, a tubular holder is provided which is sufficiently long that a threaded bolt therein will support the heaviest Weight structure to be lifted. Additionally, the tubular structure extends therebeyond and has a cross-hole through which support rods can be inserted, extending transversely to the tubular structure. This additional length is undesirable in many installations, and particularly when flat concrete slabs are to be transported.

It is an object of the present invention to provide a carrier for concrete castings which is" universally useful for widely varying loads, without wastage of material, and which is compact in use.

Subject matter of the present invention A tubular body formed with internal threads for insertion of carrier bolts, holding loops, slings, or sling hooks or the like, has lateral wings secured on the outside thereof, preferably by welding. The lateral wings are formed with openings through which support rods can be passed. These openings are located in a plane which is intermediate the length of the thread, so that the thread can be made long, for support of substantial loads, and the entire structure not be made longer than the length required for the thread to support a load, because the support rods pass laterally of the thread and not coaxially therewith. If three or more wings are used, a greater weight can be supported for a given length of tubular body than previously possible. Preferably, the wings are spaced uniformly around the outside of the tubular body, thus improving the weight distribution when a concrete casting is to be supported.

The structure, organization, and operation of the invention will now be described more specifically with reference to the accompanying drawings, wherein:

FIG. 1 is a cross-sectional, somewhat schematic view of a carrier cast into a concrete structure;

FIG. 2 is a top view of the carrier of FIG. 1;

FIG. 3 is a side view of the carrier of FIG. 1, rotated with respect to FIG. 1; and

FIG. 4 is the top view of another embodiment of the present invention, having three wings.

Referring now to the drawings: A concrete casting 1 has a tubular body, which may be a pipe stub 2 inserted therein. The tube 2 has an internal thread 3 extending throughout its entire length. A hanger bolt, sling, or p having a threaded end can be inserted into the threads 3 of the tube 2. Two plates 4 are welded to the outside of the tube to extend laterally therefrom in the form of wings. Each one of the wings 4 is formed with an opening 5 to pass support rods therethro-ugh. These support rods may, at the same time, form part of the reenforcing of the entire concrete structure and in this case can be cast into the concrete structure 1, the assembly of tube 2, and support rods passed through holes 5 being placed into the casting form before pouring of the concrete. Alternatively, the concrete form may be made so that the upper sides of the holes 5 (with respect to FIG. 1) are just below the bottom of the concrete to be transported, and support rods passed through the holes 5 thereafter for transport only.

Thickness and length of the support rods can readily be chosen in accordance with the Weight of the concrete structure to be transported. If the carrier structure is to support a block, support rods 6 can be looped through the openings 5, as seen particularly in FIG. 3. The carrier can support a very heavy weight, particularly if the support rods 6 are part of reinforcing rods which are ribbed.

In order to prevent damage to the threads 3 within tube 2, plugs 7 which are suitably of a flexible plastic (FIG. 1) are placed over the opening in the tube to prevent entry of concrete.

As can readily be seen, the thread 3 extends throughout the entire length of the supporting or carrier tube, and the length of the entire carrier unit is determined essentially by the carrying and shear capacity of the threads, without any projection therebeyond. Support rods 6, to be passed through openings 5, thus are located at a plane which can be intersected by a hanger, loop or bolt, to be inserted and threaded into thread 3 (and not shown in the drawings for clarity).

FIG. 4 illustrates a carrier having increased load carrying capabilities. Three wings 4, each formed with a hole 5', are welded to the outside circumference of the tube 2, and uniformly spaced thereover. This construction enables the use of three support rods, or bars, and still permits full insertion of a support bolt into the entire length of thread 3. Wings 4 (FIG. 1-3) or 4' (FIG. 4) need not be flat, continuous, and arranged in planes parallel to the vertical or major axis of the tube 2, but rather can be formed with projections or the like, or can be slanted or skewed in order to provide additional holding power in specific directions or to compensate for application of tension or lift in a direction at an angle with respect to the major axis of tube 2. The effective inner length of the threads 3 is not affected by the shape, and arrangements of wings 4 and the load carrying capacity can readily be arranged by suitable selection of the length and number of support rods 6 passing through openings 5. Manufacture of the support is simple. The tubular body can be threaded through and plugged at both ends by plastic plug 7 as seen in FIG. 1.

The carrier can be used not only for transport of the cast concrete structures, but after transport the carrier plugs can be used as supports, for example for structural elements to be attached to the concrete structures which were previously transported; if not desired, they can be plastered over, particularly if placed in a recessed position, as shown in FIG. 1, so that a smooth outside appearance can be presented.

Various structural changes and modifications, as determined by the requirements of particular applications or uses, may be made without departing from the inventive concept.

I claim:

1. Carrier for concrete castings comprising an elongated tubular body adapted to be cast into a concrete structure to be carried, and formed with an internal thread along its axis and substantially throughout its entire length for insertion of a threaded element; and laterally extending wings secured to the outside of said body over a substantial length thereof and extending from said tubular body, said wings being formed with openings for insertion of support bars, said opening being located intermediate the length of said body.

2. Carrier as claimed in claim 1 wherein said laterally extended wings are arranged in planes substantilly parallel to the major axis of said tubular body.

3. Carrier as claimed in claim 1 wherein said support bars are looped through said openings.

4. Carrier as claimed in claim 1 in combination with a concrete casting, said tubular body having an outer end and being located in said casting with its outer end in non-projecting position with respect to the face of said casting, support rods passed through said openings in said wings, the inner end of said body and said wings and said support rods being entirely embedded in said concrete casting.

5. Combination as claimed in claim 4 in combination with a holding bolt screwed into said internal thread, said holding bolt extending into said body at least to intersect and pass beyond a plane passing through said openings.

References Cited UNITED STATES PATENTS 1,052,149 2/1913 Kennedy 52-701 1,405,372 1/1922 White 52701 1,416,433 5/1922 Ackerman 52--701 2,214,756 9/1940 Walsh 52701 BOBBY R. GAY, Primary Examiner.

ANDREW M. CALVERT, A ssislant Examiner.