US 2463754 A
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Description (OCR text may contain errors)
March 8, 1949.
E. M. DETERS TANK FOOT i'led April 8, 1946 Patented Mar. 8, 1949 UNITED STATES PATENT OFFICE TANK FOOT Elmer M. Deters, Davenport, Iowa, assignor to Red Jacket Manufacturing Co., Davenport, Iowa, a corporation of Iowa Application April 8, 1946, Serial No. 660,560
`formed thereon, (b) cylindrical members having a series of steps arranged in helical succession, that is, at different levels but at the same distance from the center, and (c) multi-piece members having two or more wedge-shaped elements `slidable upon one another to provide an innite range of adjustment. None of these have been entirely satisfactory for this purpose in that the longitudinal wedge type and the cylindrical type have both been too bulky for the range of height adjustments provided; and the multi-piece type has been expensive due to the manufacturing, assembling, and packaging problems presented in a two-piece construction.
It is, therefore, an object of the present invention to provide a generally circular-shaped tank foot which will take the form of a single piece but which will provide a wide range of support heights approaching that of the multi-piece type above described.
The present invention may be regarded as an improvement over the above-mentioned one-piece cylindrical type in the respect that the steps are arranged in a spiral succession rather than in a helical succession, whereby more than twice the number of steps and hence more than twice the adjustment range is provided in a foot of a given diameter and height.
Other objects and advantages will be apparent from the following description in which reference is made to the accompanying drawing illustrating a preferred embodiment of the invention and wherein similiar reference characters designate similar parts throughout the figures.
In the drawing:
Figure 1 is a tcp View of a tank supported by three of the feet which are the subject of this invention;
Fig. 2 is a sectional elevational view of Figure l taken on the line 2--2;
Fig. 3 is a partial sectional view of Fig. 2 taken 2 on the line 3 3 and shows a top view of one of the tank feet;
Fig. 4 is a side elevational view of the parts shown in Fig. 3;
Fig. 5 is a perspective view of the tank foot or support'showing more clearly the spiral succession of the steps, and
Fig. 6 is a view of a modified form of the invention.
The invention is illustrated as it may be used with a tank generally designated 2| formed of a tubular upstanding portion 22 and an inverted domed bottom 23. Modifications within the scope of this invention are equally applicable to many other types of tanks, for example, square tanks with flat bottoms; such modications are not specifically illustrated in the drawings inasmuch as it is believed that they will be evident to those skilled in the art.
The supporting device or foot generally designated 24 may be formed of a single piece, for example, of cast iron. A series of steps 26 ascend along the top outer surface in a spiral succession, that is, each succeeding step is at a higher level and closer to the center line A-A (Fig. 4) than the preceding step. The steps terminate in a flat topped central axial extension 21 whichY also Amay be used as a supporting surface if desired.
In the Fig. 3 and 4 embodiment the successive steps 26 will be spaced at about 90 around the axis A-A; other embodiments may utilize different angular spacing and in some cases it may be desirable to vary the angular spacing of successive steps at different levels so that all steps may be substantially the same length. For example, it may be found desirable to space the upper steps at approximately and the lower steps at approximately 45, thereby increasing the range of adjustment height available.
The individual steps 26 may be inclined upward and outward `at a suitable angle t0 more postively engage the depending skirt portion 25 of the tank as shown in Fig. 4. Highly satisfactory results have been experienced where the inclination of the step surface with respect to a vertical plane, that is the angle B in Fig. 4, is in the range between 5 and 15. This inclination of the step surface is. not essential however, as satisfactory results have also been experienced with horizontal steps and in some cases, as for instance, with flat bottomed tanks having no equivalent of the skirted portion 25, horizontal steps may even be preferred for flatwise engagement with the tank bottom.
Another modification of this invention is shown in Fig. 6 where the supporting height is made infinitely variable, within limits of the top and bottom of the foot, by providing a single spiral surface 28 in place of the spiral succession of individual steps 2G as shown in the previous gures. And, as previously explained in connection with the Fig. 4 modification, the outer edge of the surface 28 may or may not be higher than the inner edge. Y
It is believed that the use and operation of this device will be apparent from the foregoing. On round tanks, as illustrated, -a group of three tank feet will usually be suicient toprovide the required stability, and on rectangular or -square tanks four or more feet may be required. In use, the tank will be temporarily -supported as by means of blocks or jacks to the level position desired, and the tank feet 24 then inserted beneath the tank edge and rotated until a suitable supporting surface 26 `(or a suitable part of the spira1 surface 28 in the Fig. 6 modification) is level with the correspondingportion of the tank bottom. Then the temporary support will be removed and the full Weight of the tank allowed to rest upon the set of feet. The problem of leveling a tank in this manner is commonly presented when installation ismade on a floor pitched to a drain, as that shown in Fig. 2.
I-claim: l 4 Y" 1. A supporting foot for a tank or the like comprising -a body having formed thereon a series of steps arranged in spiral succession about an axis of the body, said steps being spaced axially of the body anddisposed, at progressively greater radial distances from the axis ofthe body from the top to the bottom, of the body.
2. A supporting foot for a tank or the like comprising avbody having formed thereon a series of steps spiraled around thefcenter of the body and arranged at different levels and different distances from the center-thereof.v
vr3, A supporting .foot for atank or the like cornan vof thewbody, said steps being disposed at progressively greater Vradial distances hfrom the 4 central axis of the body from the top to the bottom of the body.
4. A supporting foot for a tank or the like comprising a solid body having formed thereon a series of steps arranged in spiral succession about the axis of the body, said steps being disposed at progressively greater radial distances from the center axis of the body in a direction extending from the top to the bottom of the body, the outer portion of each of said steps being at a higher level than the inner portion.
5. A supporting foot for a tank or the like comprising a rigid bodyx having formed thereon a series'ofsteps spiraled around the center of the body and progressively arranged at different levels and different distances from the center thereof, each of said steps being pitched upwardly and-outwardly at an angle of 5 to 15 with respect to a horizontal plane.
6.-A supporting foot for a tank or the like comprising a solid rigid body having formed thereon a spirally ascending upwardly facing surf-ace, said surface being progressively radially closer to the axis of said body in a direction from the bottom to the top of the body.`
'7. A supporting foot for a tank or the like comprising a body having formed thereon a spirally extending upwardly facing surface, said surface being at progressively greater radial distances from the central axis of the body from the top to the bottom, said surface being so formed that at a radial cross-section through a vertical plane the outer portion will be at a higher level than the inner portion. i
ELMER M. DETERS.
REFERENCES CITED The following references are of record in the file of this patent:
UNITED STATES PATENTS Number Name Date 338,667 Hornbostet Mar. 23, 1886 1,268,245 Hoiland June 4, 1918 1,725,499A Wetzel Aug'. 20, 1929 1,915,320 Jones June 27, 1933 1,973,948 Fogelstrom Sept. 18, 1934