USRE21135E - Liquid storage tank with floating - Google Patents

Description

July 4, 1939.

o. A. BAILEY LIQUID STORAGE TANK WITH FLOATING` ROOF Original Filed Aug. 13, 1952 5 Sheets-Sheet l July 4, 1939. o. A. BAILEY Re. 21,135

LIQUID STORAGE TANK WITH FLOATING ROOF Original Filed Aug. 13, 1932 5 Sheets-Sheet 2 July 4, 1939.

Original Filed Aug. 1 5, 1932 5 Sheets-Sheet Z July 4, 1939. o. A. BAILEY LIQUID STORAGE TANK WITH FLOATING' ROOF Original Filed Aug. 13, 1932 5 Sheets-Sheet 4 July 4, 1939.

O. A. BAILEY Re. 21,135 LIQUID STORAGE TANK WITH FLOATING ROOF Original Filed Aug. 13, 195" 5 sheetssheet 5 Reima mi 4. 1939 Re. 21,135-

cago Bridge & Iron Company, Chicago, Ill., a corporation of Illinois Original No. 1,932,392, dated October 31, 1933, Se-

rial No. 628,753, August 13, 1932. Application for reissue February 15, 1939, Serial No. 256,611

7 Claims. (Cl. 2211-26) 10 rary support can also be used in connection with by the roof .on its underside, the supports of one W or for aiding in the construction and erection of -set being movable to operative position where the tank, roof or parts thereof. they will engage the supports oi the other set The distance above the bottom of the tank that or to inoperative position where they will clear the roof is thus temporarily supported is ordithe supports of the other set. As here shown, the

narily high enough to permit workmento operset of supports carried by the roof on its underl" ate under the same. In the normal operation of side are the movable supports. the roof, however, when the same is iloating on Describing the form shown in Figs. 1 to 5, in-v liquid in the tank, it is desirable to have the roof clusive, more particularly, I4, Il indicates radial descend to a lowest point somewhat closer to the supporting channels on vthe bottom of the tank,

bottom of the tank. To permit this, therefore, the outer ends being supported by bracket mem- 20 the temporary sustaining means must be so conbers I5 attached to the side wall I0 and the inner structed that it can be rendered inoperative or ends by A-frames I6, the feet of which are atpartially inoperative, and vice versa, when liquid tached to the supporting channels Il resting on is in the tank. the tank bottom II. As here shown, there are One of the features of my invention is the pro-` eight oi' these channel supports, one arranged 25 vision of such sustaining means for a roof which substantially under each bulk head I2. will fulfill the requirements above referred to. 'Ihe set of supports carried by the roof on its Other features and advantages of my invention underside include eight swingable gate members will appear more fully as I proceed with my I8 hingedly attached to the underside of the specification. roof by the offset vertical pivot I3. Each of the 30 In those forms of devices embodying the feamembers I8 includes a wide foot Il* adapted to tures oi my invention shown in the accompanyrest on the upper edge ofthe channel I4 and a ing drawings- *Y plate lab adapted to engage the underside of the Figure lis atop plan view; Fig. 2 is aview taken rooiI beneath the bulk head I2 when the gate as indicatedl by the line 2 of Fig. 1; Fig. 3 is a view?v is in operative position, as shown in Fig. 4. 35 in side elevation of one of the sustaining means; The gate may be swung inwardly on the pivot Fig. 4 is a view taken as indicated by the line 4 I9 to inoperative position, as shown by the broken of Fig. 3; Fig. 5 is a view taken as indicated by lines in Fig. 5, in which position all the gates the line 5 of Fig. 3; Fig. 6 is a view similar to Fig. will clear the channel supports Il by passing be- 3 showing a modined form; and Fig. 'I is a view tween them. A depending angle iron 23 attached 4u taken as indicated by the line 1 of Fig. 6. to the underside of the roof is provided to limit As shown in the drawings, III may indicate the the outward swinging of the gate or support I3. cylindrical side wall of a liquid storage tank and The lower end of the pivot is supported by the II, the bottom thereof. I2 indicates, in general, diagonal braces 2i and 22, the latter serving as a iioating roof including a nat centralsheet metal a stop for the gate `when swung to its inopera- 45 portion I2* supported by an annular pontoon I2. tive position. here shown as divided into eight compartments For swinging each gate I provide a shaft 23 exby the bulk head llc. tending through a suitable tube 2l in the pontoon It is to be understood that any suitable means of the floating roof, the upper end of the shaft 5o (not shown) may be employed for sealing the 23 being provided with a crank 25 having an .5o space I3 between the periphery I2d of the floating operating handle 23. The lower end o1' the shaft roof and the shell or side wall I0 of the tank. 23 is provided with a crank 21; the end of which In general, my invention includes a set of supis attached by a connecting rod 2l to the gate I3. ports between the rooi' and bottom of the tank 29 may indicate a notched member on the top movable from operative position, where they will of the pontoon in which the crank 3i may rest 55 oi the tank when the latter is empty. It is frequently necessary or desirable to support the roof temporarily a certain distance above the bottom of.the tank when the same is empty for cleaning, repair and inspection purposes. Such a-temposupportthe roof spaced the desired and predetermined distance above the bottom of the tank, to inoperative* position, where they will permit the roof to descend closer to the bottom of the tank, and vice versa, together 'with means for controlling said supports from above the roof.

In the form shown in Figs. 1 to rinclusive, the supporting means include a set of supports on the bottom of the tank and a set of supports carried to retain the rank in the position shown in Fig. 4. To release the crank from this notch, the

-same may be lifted somewhat, the shalt I3 slid- In the form of support shown in Figs. 6 and 'l I provide a plurality of legs Iii hingedly attached to the root by the horizontal pivots ll near the periphery of the same. Each of these legs is adapted to hang in a vertical operative position. as shown by the solid lines in Fig. 6, or be lifted up into 'inoperative position, as shown by the broken lines in Fig. 6. As here shown, each leg may be lifted by a cable or chain I2 extending through a tube 33 in the pontoon and adapted to be wound upon a winch 3l on top of the roof. The bottom of each leg is preferably provided with an extension l! to help distribute' the load and also to counterweight the leg sd that it will hang substantially vertical. As shown in Fig. '7, each of the legs 3D may be made of considerable width with cross-br gliil in order to lessen the possibility ot circular de sway.

While I have show n and described certain embodiments of my invention, it is to be understood that it is capable of many modifications. Changes therefore, in the construction and arrangement may be made without departing from the spirit arid scope of the invention as disclosed in the appended claims, in which it is my intention to claim all novelty inherentin my inventlon as broadly as permissible, in view of the prior art.

What I regard as new, and desire Letters Patent, is:

1. A liquid storage tank, comprising a bottom and side wall, a iloating roof adapted to normally rest upon liquid in the tank, a set of hinged supports between the root and the bottom of the tank swingable from operative position where they will support the roof spaced a predetermined distance above the bottom ot the tank to inoperative position where they will permit the roof to descend closer to the bottom of the tank, and vice versa, and means for controlling said supports from above the roof.

2. A liquid storage tank, comprising a bottom to secure by and sidewall. a iloating roof adapted to normally rest upon the liquid in the tank, and means for' sustaining the roo! spaced a predetermined distance above the bottom ot the tank when empty, said means including a set ot radial supports on the bottom of the tank and a set of supports carried by the roof on its underside on vertical pivots and swingable on said pivots from operative position where they will engage the radial supports on the bottom of the tank to inoperative positionA where they will clear said radial supports, and vice versa.

3. Apparatus as claimed in claim 2, with means for swinging said supports operable from above the roof.

4. A liquid storage tank, comprising a bottom and side wall, a floating roof adapted to normally rest upon liquid in the tank, and means for sustaining the roof spaced a predetermined distance above the bottom of the tank when empty, said .L

means including a set of supports on the bottom of the tank, and a swingable gate member attached to the underside ot the roof by an odset vertical pivot for each of the supports on the bottom of the tank.

5. Apparatus as claimed in claim 4. with means for swinging the gate members on their vertical pivots from above the root.

6. A liquid storage tank, comprising a bottom and side wall, a oating root adapted to normally rest upon liquid in the tank, and means for sustaining the root spaced a predetermined distance above the bottom of the tank when empty, said means including a set of supports on the bottom of the tank and a set of movable supports attached to the underside of the roof on vertical pivots and swingable on said pivots to operative position where they will engage the supports of the other set or to inoperative position where they will clear said supports of said other set.

'7. Apparatusas claimed in claim 6 with means operable from above the roof for swinging said supports on said pivots.

o'rrnannmanam.

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