US1972002A

US1972002A - Packer head

Info

Publication number: US1972002A
Application number: US497895A
Authority: US
Inventors: Almquist Gus
Original assignee: Individual
Current assignee: Individual
Priority date: 1930-11-24
Filing date: 1930-11-24
Publication date: 1934-08-28
Anticipated expiration: 1951-08-28

Description

G. ALMQUIST PAGKER HEAD Aug. 28, 1934.

Filed NOV. 24, 1930 BY dud 4 NIMII Jase .NVENTOR O ATTORFE,

Patented Aug. 28, 1934 UNITED STATES Per 1 Claim.

This invention relates to a packer head for cement pipe forming machines, the general object of the invention being to so form the head that the concrete forming the pipes will be solidly packed and the pipes will be practically nonporous.

This invention also consists in certain other features of construction and in the combination and arrangement of the several parts, to be hereinafter fully described, illustrated in the accompanying drawing and specifically pointed out in the appended claim.

In describing the invention in detail, reference will be had to the accompanying drawing wherein like characters denote like or corresponding parts throughout the several views, and in which:-

Figure 1 is an elevation of the improved head.

Figure 2 is a view taken at right angles to Figure 1.

Figure 3 is a section on line 3-3 of Figure 1.

Figure 4 is a section on line 4-4 of Figure 2.

Figure 5 is a top plan view.

Figure 6 is a section on line 66 of Figure 1.

As is well known, machines for forming pipes of concrete comprise a cylinder having a packer head therein, with means for rotating the head and gradually raising the same so that the head will press concrete in the cylinder into tubular form to form a pipe. The heads, as now constructed, consist of a cylindrical part having a spider attached thereto which carries at each end a trowel member and wings for causing the concrete placed in the cylinder on top of the head to pass to the sides of the cylinder, where it will be acted on by the trowel members and then by the cylindrical part so that the concrete is pressed into tubular form.

In carrying out the invention, I provide a second set of trowel members and a second cylinder, which are of greater diameter than the first set and which are arranged below the first set so that the second set will pack the concrete and thus make the pipe non-porous as the pipe is troweled twice instead of once.

In the drawing, the numeral 1 indicates the extension shaft which is threaded to the lower end of the main shaft of the machine and the numeral 2 indicates the top spider which is keyed to the shaft and has bolted to its top part the wings 3 which cause the concrete placed in the cylinder on top of the head to pass to the sides so that it will enter the space between the head and cylinder. The trowel members 4 are bolted to the spider and extend over the ends thereof so as to engage the concrete. The cylinder 5 is bolted to the casting 6 which is keyed or otherwise fastened to the shaft 1 under the spider. The second spider is shown at '7 and its trowels at 8. This second spider is also keyed or otherwise fastened to the shaft and is located under the cylinder 5. A second casting 9 is fastened to the shaft under the spider '7. and a cylinder 10 is bolted to this second spider. This second cylinder 19 and the trowels 8 carried by the second spider '7 are of greater diameter than the spiders and cylinder of the first set so that the second set will compress the concrete, shaped into a pipe by the first set, so that the concrete forming the finished pipe is greatly compressed and is non-porous, as the concrete is subjected to two troweling actions instead of one.

As is understood, the parts of the head are similar to the parts used in heads as now constructed, but I use two sets of trowel members and cylinders instead of one, with the lower set of larger diameter than the first set.

A nut 11 is threaded on the lower end of the shaft 1 to hold the parts on the shaft.

It is thought from the foregoing description that the advantages and novel features of the invention will be readily apparent.

It is to be understood that changes may be made in the construction and in the combination and arrangement of the several parts, provided that such changes fall within the scope of the appended claim.

What I claim is:-

In a packer head of the kind described, spaced upper and lower disk-like castings, the upper casting being of slightly less diameter than the lower casting, finishing spiders above and below the upper casting and disposed in crossed relation to each other, said spiders being formed with curved corners at their ends and reversely disposed diametrically opposite one another, trowelers carried by the ends of the spiders and overhanging the curved corners thereof, cylinders fitting the castings, and a rotating shaft connecting the spiders and castings as a unit.

GUS ALMQUIST.