US2474937A - Self-cleaning grid tamper for concrete - Google Patents

Description

July 9- v J. -r. FEELEY ET AL r 2,474,937

SELFTCLEANING GRID TAMPER FOR CONCRETE Filed July 31 1946 I8 22 h'f ilf'k 922822101 Patented July 5, 1949 SELF-CLEANING GRID TAMPER FOR CONCRETE John T. Feeley and Wells P. Goodenough, Palo Alto, Calif.

Application July 31, 1946, Serial No. 687,310

3 Claims.

This invention relates to improvements in concrete self -cleaning grid tampers.

An object of the invention is to provide an improved self-cleaning grid tamper for concrete for tamping and settling concrete when first put down to pack and settle the same. Y

Another object of the invention is to provide a one man operated self-cleaning grid tamper for concrete comprising an inverted U-shaped handle having main parallel cross-frame members secured to its lower ends and suitably braced, and a plurality of interconnected spaced tamping rods secured between said main cross members.

A further object of the invention is to provide an improved self-cleaning grid tamper for concrete including an offset inverted U-shaped handle having spaced tamping grid bars supported thereon by welding or by bolts, as desired.

Another object of the invention is to provide an improved self-cleaning grid tamper for concrete including an inverted U-shaped handle suitably connected by parallel extending grid rods, and adapted to detachably support a grid frame having attaching hook fasteners, whereby newly poured concrete may be tamped without interfering with the materials of the concrete mixture.

Another object of the invention is to provide an improved self-cleaning grid tamper for concrete which will be highly efiicient in operation, and relatively inexpensive to manufacture and produce.

Other objects will appear as the description proceeds.

In the accompanying drawings which form a part of this application,

Figure 1 is a perspective view of the improved self-cleaning grid tamper for concrete;

Figure 2 is an end view of the improved selfcleaning grid tamper for concrete Showing the ofi-set handle therefor;

Figure 3 is a view taken on the line 33 of Figure 2;

Figure 4 is a perspective view of the detachable grid frame for the tamper and,

Figure 5 is an enlarged detailed view of the mesh construction forming the detachable grid frame.

Like characters of reference are used throughout the following specification and the accompanying drawings to designate corresponding parts.

In carrying out the invention, there is provided an improved inverted U-shaped handle having an upper centrally disposed grasping portion I and integral depending downwardly and outwardly flared side portions 2 and 3, which are bent adjacent their lower ends to form the vertical portions 4 and 5.

Relatively heavy parallel extending cross-frame members 6 and l are welded or bolted at 8 to the lower ends of the handle portions 2 and 3 and are suitably braced by the inverted U-shaped bracing arms 9 and I0 welded or bolted at H to said handle portions 2 and 3, and welded at I2 to the opposite inner ends of said cross-frame members 6 and I.

A plurality of spaced parallel extending selfcleaning tamping bars l3 are disposed between the frame members 6 and l and are welded or bolted to their lower edges at M.

A pair of spaced bracing rods l5 are welded or bolted at It to the upper edges of said tamping bars l3 to reinforce the same.

A detachable tamping grid is provided with the longitudinally extending parallel frame arms I! and I8 formed with the arcuate attaching hooks l9 at their opposite ends for securing about the opposite cross-frame members 6 and 1. The end frame arms 20 and 2| are welded or bolted to the arms I! and I8 to provide a substantially rigid frame in which the heavy mesh 22 is secured in any desired manner.

In operation, the concrete when first poured will be tamped with the self-cleaning grid tamper having the tamper bars only. After the concrete has been settled and packed, the removable grid tamper frame will be hooked over the tamper, and the concrete tamped to evenly settle the uppermost portions thereof.

It will be understood that the improved tamper may be used for any form of concrete work, and may be made in larger sizes for two man operation for making concrete roads and for large operation.

While the preferred embodiment of the instant invention has been illustrated and described, it will be understood that it is not intended to limit the scope of the invention thereto, as many minor changes in detail of construction may be resorted to without departure from the spirit of the invention.

Having thus described our invention what we claim as new and desire to secure by Letters Patent of the United States is:

1. A self-cleaning grid tamper for concrete comprising an inverted oiT-set U-shaped handle, transversely extending spaced parallel frame members secured thereto, inverted U-shaped bracing members secured to said handle and to Said parallel frame members, a plurality of spaced self-cleaning longitudinally extending tamping bars secured to the lower edges of said parallel frame members, spaced reinforcing bars secured transversely to the upper surfaces of said tamping bars, and a grid frame having hooked attaching arms at its corners for removably supporting the same on saidtamper -be1ow:safl d;tampingiba.1fs.

2. A self-cleaning 'g-r id tamper for concrete comprising a plurality of spaced self-cleaning longitudinally extending tamping bars, meanssecuring said bars in spaced relation s gri-dsframe I having hooked attaching arms at its corners tor removably supporting the same on said tamper below said tamping bars, and a handle secured,

to said tamping bars.

3. A self-cleaning grid tamper for concrete comprising an inverted U-shaped handle-"spaced"- parallel frame members secured thereto, a plu- 20 2,333,855

REFERENCES CITED 'The following referemces are of record in the file of, vthispatent:

UNITED STATES PATENTS Number .Name Date 1,659,,024 Hamilton Feb. 14, 1928 2,291,891 Glymph Aug. 4, 1942 Gascoigne Nov. 9, 1943

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