Патент USA US2113060код для вставки
April 5, 1938. ' ' R. A. SANDBERG 2,113,060, SPHERICAL RECEiIVER TANK AND METHOD 0F? MAKING S'AME Filed Sept. 2, 1957 ' _ a0 /7 /6 ? /9 / ? ~ � I w \\ l?ffx // /6 Z3 (, A5.? I " i516 / 2/ 6/930 _ '55 , �57 if, ? /3 la // /4a @6 / x 333I /5/ 37'" ( ' Q,3,@II1 " ? 34 Mb . ? /4 T RAY A. SANDBERG .? ? ' Patented Apr. 5, 1938 I 2,113,060 UNITED STATES PATENT OFFICE SPHERICAL AND METH镈 - Q i _ Q OF MAKING SAME Bay A. Sandberg, Waukegan, 111., assignor to Oakes Products? Corporation, North 0mm, 111., a corporation ofMichig Application September z, 1931, Serial N'q. 162,092 9 Claims. (on. 1|13-l20) . This invention relates to stamped metal spher A refrigerant inlet tube or ?tting extends from the tank near the top thereof. ical containers and includes the process of mak- . ing the containers. The entire assembly is brazedv together by a. More speci?cally the invention relates to spher ical receiver tanks-for mechanical refrigeration single brazing operation. systems.? vide strong spherical-tanks formed from sheet \ It is thenan object of this invention to pro ' Mechanical refrigeration systems of the com metal. pressor-condenser-evaporator ' type usually have ? - incorporated therein, between the condenser and ' spherical receiver tanks for refrigerator systems. A further object of this invention is to rein storing condensed refrigerant; The refrigerant force metal surrounding openings for ?ttings is fed from the receiver tank to the evaporator and the like in thin gauge metal receiver tanks. A further object of this invention is to provide a. method of making spherical tanks wherein all of the constituent parts of the tanks. are inte unit. 1 - Since the refrigerant in the receiver tank is '15 usually under pressure it is highly desirable that these receiver tanks be- made sufficiently strong to withstand high internal pressure. At the same time, however, it is desirable to form the ?receiver tanks from as thin gauge metal as pos sible in order to decrease the weight of the unit and also decrease the manufacturing cost. , 5 ? Another object of this invention is to provide 10 the evaporator, a tank or closed receptacle for 20 . 10 grally united by a single brazlngoperation. A further object of this invention is to provide spherical tanks for refrigerator systems having ?ttings integrally secured thereto and ?extending through openings provided in_ the tanks together - N) ? with reinforcing means for strengthening the According to this invention, a spherical or ball shaped tank is formed from a very thin gauge metal and is so assembled as to be able to with-, tank metal around the openings receiving the fittings.v ? I - Other and further objects of this invention will stand high internal pressure. It is known that ' become apparent to those skilled in the art from 25 a spherical tank will withstand higher internal the following detail description of the annexed , pressures without bursting than a tank? of any sheet of drawings which discloses a preferred? other shape since the pressure is uniformly dis embodiment of the invention. tributed in a spherical receptacle. While the invention will hereinafter be de According to this invention, the tank is formed ' i scribed in connection with a refrigerant receiver � from hemispherical stamped metal male and , tank having special ?ttings secured thereto, it female cups.? The rim of the female cup mem ber is provided with an outturned annular ?ange. The open mouth of the male cup member is then 35 readily inserted into the female member since should be understood that the} tanks of this in vention are adapted to wide usage and that different types of ?ttings can be used without departing from the scope of the invention. ' the??ange on the female member facilitates a .. "On the drawing; seating of the male member in the female mem ber. ~ ' ' a concave cup-receiving portion. . Circular openings are formed in'the top and bottom of the tank for receiving bosses or ?t tings therein. The support member for the tank 45 receives the bottom ?tting therethrough and reinforces the tank around the opening through the bottom thereof. The bottom ?tting con nects with the supply line to the evaporator unit ' in' a refrigerator system. , The metal surrounding the opening in the top of the tank is-reinforced by a washer mem ber disposed on the inside of the tank around the top ?tting thereof. The top ?tting receives ' ' ceiver tank according to this invention. v A support is provided for the spherical tank composed of a stamped metal disc formed with , 1 is a side elevational view of a re ' Figure 2 Islam enlarged vertical cross-sectional view taken through a receiver tank assembly, 40 with parts shown in elevation, illustrating the manner in which the parts of the tank are as sembled prior to the brazing operation. Figure 3 is an enlarged detail view shown in vertical cross-section illustrating the manner in which the male and female cup members form-' ing the tank are assembled for the brazing oper ation. ' _ ? Figure 4 is an enlarged fragmentary vertical cross-sectional view illustrating the manner in 50 which the ?ttings for the tank are assembled in the male cup member, prior to. the brazing? operation. -a purge valve for blowing entrapped air and Figure 5 is an enlarged vertical cross-sectional ?other gases from the refrigerant in the tank. \ fragmentary view, with a part in'elevation, illus 55 .2. 2.113.060 " 3 ' . X trating the manner in which 'the support for the _ male member without danger of blowing out the tank and the ?ttingsare assembled to the female - ?tting when the interior of the tank is under A cup member prior to the brazing operation. ? Figure 6 is an enlarged detail cross-sectional view of? thejointbetween the maleland female cup members after the brazing operation. As shown on the drawing: ' " , pressure. The male member Ii is also punched to form an opening ?therethrough-in spaced relation from the opening II. In forming the opening 24 the cup member II is preferably pierced from In Figure 1 the reference numeral Ill desig- . the inside so as to extrude an annular ?ange nates generally a receiver tank according to this. 25 around the opening 24. invention. The tubular fitting 26 is inserted into the opening 24 in contacting relation with the ?ange The tank [0 comprises a hemispher- - ical metal male cup member Ii having the open end thereof seated in a. hemispherical female metal cup member l2. The female cup member l2 has an outturned ?ange l3 formed?aroun'd the rim thereof for a purpose to be hereinafter more fully described. ' . The female member l2 has a support l4 for the tank l0 secured to the bottom portion there of and a ?tting l5 extending through the sup 20 port I4 and through the bottom of the cup mem ber l2. - ? The male cup member I I has secured thereto - 25. The tube 26 serves as a fitting for introduc ing refrigerant from the condenser of a refrig erator system into the tank. - ' A brazing wire 2'! is disposed around the tube 15 26 on top of the ?ange 25. The bottom of the female clip member [2 is pierced from the ?outside to form a circular open ing 28 therein de?ned by an inturned ?ange 29. The ?ange 29 is formed during the piercing op 20 eration. A cylindrical shank portion l5a of the ?tting a top ?tting l5 extending through the top there I5 is inserted through the opening 28 and snugly of and a tube or ?tting 26 extending there engages the inner wall of the ?ange 29. A shoul der l5b is formed between the head of the ?t ting l5 and the shank of the ?tting I5a. This shoulder l5b abuts the cup member l2. A brazing wire 30 is disposed around the ?t through in spaced relation from the top thereof. According to this invention the various con? > stituent parts of the receiver tank III are assem bled so as to be integrally united by a single braz ing operation. For this purpose an assembly 30 such as is shown in Figures 2 to 5 is made prior to the brazing operation. The cup members II and I2 are formed by stamping or drawing thin gauge sheet metal of a type suitable for brazing. Brass sheets, cop 35 per plated steel sheets and the like metals are preferred. As best shown in Figures 2 and 4, a circular opening I?! is punched through the top of the male cup member II. During the stamping op-? 40 eration a ?at portion 18 is formed around the: opening H. The ?tting 15 has a cylindrical shank portion Ilia extending from the bottom thereof. A shoul-? der lGb is formed between the shank portion Ilia and the main head portion of the ?tting I 6. The shank We of the ?tting I6 is inserted through the opening I?! of the metal cup member ll until the shoulder lib of the ?tting rests snugly on top of the ?at portion l8 surrounding the hole l1. ? , _ The ?tting I5 has a bore extending there through (not shown) and may receive therein a plug" member for closing the bore. The fitting l6 serves as a means for'purging the interior ting iiiadjacent theshoulder I517. The support member I4 is then disposed 30 around the ?tting i 5 and seated against? the .cup member l2. . ' The support I 4 can be formed by stamping ?a circular metal disc to provide a raised portion - l4a thereon having a concave face M1) for re ceiving female cup member l2. The central portion of the concave base I4b is pierced to provide a circular opening 3| therethrough de ?ned by a downturned annular ?ange 32. Slots or holes 33 are'punched through the ?at portion of the support member l4 near the outer periphery thereof so that the support can be bolted or screwed to the base plate of a refrig erator apparatus. The support member I4 is slipped over the'?t ting member l5 with the ?ange 32 thereof snug 46 ly engaging the ?tting i5. This provides a ch_amber 34 in which the brazing wire 30 is disposed. As pointed out above, the rim of the female member l2 has an outturned ?ange i 3 formed 50 thereon preferably at right angles to the mouth of the member I2. _ I The male member ll then has the-open end thereof seated into the mouth of the female of the tank from entrapped air and gases. . member l2 as shown at H a in Figures 2 and 3. 55 A wire I!) of a brazing "metal such as brass or? The ?ange l3 forms a support .?for a brazing any other metal capable of alloying with the ?t-_ wire 35. ting l6 and the metal cup II is disposed around _ The entire assembly as shown in Figure 2 is the shank portion Ilia of the ?tting IS. then placed in a brazing furnace and heated to 60 A washer 20, somewhat U-shaped in cross brazing temperature. _ i section, is slipped over the shank i6ya of ?the ?t If brass brazing wires are used the assembl ting with the leg 2| thereof snugly disposed is heated to temperatures around 1800" F. Obvi around the shank I611. The other leg 22 of ?the ously otherwtemperatures for different types of washer abuts the inner surface of the male cup brazing wires can be used without departing 65 member H and is shaped to have an area con from the scope of the invention. tact with the cup member. The washer 20 has a large radius de?ning a cavity 23 in which the wire I9 is located. _ ' ' The washer 20 can be staked into position , The brazing wires I1, 21, 30, and 35, when the assembly is heated to the brazing tempera? tures, alloy with the ?ttings and the cup mem bers to integrally unite the adjacent surfaces. 65 70 as by means of a prick punch so that it will be held'tightly against the metal cup member II at the time the assembly is brazed. The washer of these members and thus form an integral unit. 70 If the brazing wires are heated above their melt ing points the brazing metal will ?ow by capil serves to reinforce the metal surrounding the ? lary action between the contiguous surfaces of opening I?! in the male member and makes pos the cup members and ?ttings to form, upon sible the use of very light gauge metal for the solidifying, a solid solution or alloy 35 as shown 75 9,118,060 _ in Figure 6. Even though the parts are snug ?tted together~ the brazing metal-will ?ow \be , 1 the'female'member- around the male member, and heating the ?parts? to brazing temperature tween the parts due to its'tenacious capillary -_ ror alloying the brazing metal with the parts to a?lnity for the metal. It will, of course, be ap 15 preciated that the accompanying illustrations integrally unite the same. _ _ a 2. In the method of making metal containers are somewhat diagrammatic in so far as they having ?ttings integrally united therewith, the illustrate the brazing wire and the ?ow oi? the? steps which comprise providing ,a segmental same under heat. It is understood, however, spherical metal cup member, forming a hole that the brazing wire should be so positioned in ? through the cup member, inserting a ?tting ' 10 close proximity to the outer extremities of the ' having a cylindrical shank portion through said surfaces to be' brazed as to enable thedesired hole, disposing a brazing metal around the cylin 10 ?ow of the brazing wire. _ - - drical shank portion in the cup member, seating If desired, as when making the larger size re a washer having an outturned ?ange around the ceiver tanks, a second brazing wire 81 (Figure cylindrical shank portion of the ?tting with the 15 2) can be disposed in the space-between the , ?ange of the washer contacting the cup member, female cup member i2 and the upturned portion said brazing metal being between'the cup mem 15 I la. of the support member ll. Usually, how? ber and washer, and' heating the assembly to? ever, the brazing wire 30, as shown in Figure 2, brazing temperature and thereby alloying the is su?icient to unite the support I! with the brazing metal? with the washer, the ?tting and 20 female cup member l2 and also to integrally the cup member. ? . 20' braze the ?tting I! with the cup member. 3. The method of makingyspherical generally The ?ange l3 on the male cup member I! closed light metal containers adapted for use as serves a three-fold purpose of facilitating the insertion of the portion Ha of the male member 25 ll into the,mouth of the female member II, .of forming a support for the brazing wire 35, and of rigidifying and strengthening the ?nal as sembly against distortion. The washer 20 serves a dual function of pro 30 viding a seat for the brazing wire l8 and of re? inforcing the metal of the cup member ll sur rounding the opening H for the ?tting l6. receiver, tanks in refrigeration? systems which comprises providing'two hollow hemispherical metal cup members, forming an outturned ?ange 25_ around the rim of one of the cup members, form ing holes through the closed ends of the cup members,? inserting ?ttings having cylindrical ' shank portions in said ?holes, disposing a stamped metal support-member having a concave face around the ?tting on the ?anged cup member, interposing a brazing wire between the support member and the cup member, said support mem ber receiving the cup member on the concave 30', Likewise the support It serves a three-fold function of providing a support for the tank, 35 hi defining a cavity for the brazing wire 30 and face thereof, said ?tting in the hole of the other " of reinforcing the metal of the cup I! around cup member having a cylindrical shank portion the opening 28 for the ?tting lb. - extending into said cup member, disposing a The provision of reinforcing members around ?anged washer around皌he cylindrical shank por the large openings in the tanks of this invention tion of said ?tting in said- cup member, said ' 40 has made it possible to use very light gauge washer having a ?ange adapted to contact an metal for forming the tanks. For example, the area of said cup member surrounding said hole, cup members II and I! have been made of metal interposing a brazing wire between the washer around .037 inch in thickness and the tank as sembly will withstand hydrostatic internal pres 45 sures between 1,000 to 1,200 lbs. per square inch. When the reinforcing members, such as a washer 20 was not used, the area ?of the cup member ll around the ?tting I5 is distorted and even torn loose at much lower pressures with such light 50 gauge stock metal. , I am aware that many changes may be made "'and"?numerous details of construction? may be varied through a wide range without departing from the principles of this invention, and I, ? and the cup member, seating the open end of said cup member in the ?anged cup member, dispos ing a brazing wire on the ?ange adjacent the seated cup member and heating the assembly to brazing temperature for alloying all of the braz ing wires with the adjoining? parts to integrally _ ~ unite the parts. . 4. A container comprising integrally united male and female cup members, said female cup member having an outturned??ange thereon to rigidify the structure, inlet and outlet secured to said cup members ?and a support sur 55 therefore, do not purpose limiting the patent . rounding one of said ?ttings and united to said granted hereon otherwise, than necessitated by the prior art. I claim as my invention: ' female cup member. 5. A spherical receiver tank comprising male ' 1. The method of making a spherical container ? G0 which comprises providing male and female hemispherical metal cup members, forming an outturned ?ange on the rim of the female cup member, piercing a relatively large hole through 'the base 'of the female cup member to form an (:5 inturned annular ?ange around the hole, provid ing a support member having a concave seat por tion for receiving the bottom of the female cup member, piercing a hole through the center of the support member, inserting a ?tting through 70 the hole of said support member and into the hole at. the base of the cup member, disposing a brazing wire around the ?tting between the sup port and the cup member, inserting the open mouth of the male member into the female 75 member, disposing a brazing wire on the ?ange of and female hollow hemispherical cup members, said female cup member having an outturned ?ange formed around the rim thereof and said male member having the open end thereof seated in said female member and integrally united therewith, a ?tting extending into the male cup member and having a cylindrical shank portion therein, a ?anged washer disposed around said shank portion in said male cup member and having a ?ange integrally united with the metal of the cup member surrounding the opening in which the ?tting is seated, a ?tting extending' through the- bottom of the female cup member having a shank portion extending from the cup member, an annular metal base portion disposed around said shank of the ?tting and having a concave face integrally united with the female cup member. ? . 4 2,113,080 6. A spherical receiver tank for refrigerator assemblies comprising opposed hollow hemi spherical cup members in inter?tting relation and integrally joined together along the over ? lapping margins thereof, I ?ttings extending through the top and bottom of said cup members . , - , brazed to the outer face of?the bottom cup around the opening therein. 8. A spherical pressure retaining tank com prising stamped metal hemispherical male and female cups, and an integral outturned penna 5 nent??ange around the mouth of the female cup and reinforcing metal members including ?anges - only, the mouth of said male cup being inserted snugly surrounding the ?ttings and other ?anges into the mouth of the female cup and extending extending outwardly from the ?ttings, said therein in telescoped relation thereto, the in serted portion of the male cup being integrally 10 10 ?anges being respectively united to the ?ttings and cup members to reinforce the metal of the brazed to the female? cup and said ?ange on the cup members surrounding the ?ttings. female cup remaining as a permanent rigidifying 'Z. A light gauge metal spherical refrigerant means for the tank; receiver tank comprising opposed top and bottom 9. A? pressure retaining vessel comprising op 15 metal hemispherical cups, said bottom cup having posed hollow male and female cup members, an 15 an outturned ?ange around the mouth thereof integral outtumed ?ange around the mouth of and said top cup having the open end thereof seated in the mouth of the bottom cup and brazed thereto to form a closed spherical tank, said tank 20 having circular openings in the top and bottom thereof, metal ?ttings secured to said tank and having cylindrical shank portions extending through said openings, a metal washer in the tank brazed around the top ?tting and having a face thereof brazed to the inner face of the top cup around the opening therein, and a metal disc on the?bottom of the tank brazed around the bottom fitting and having a concave face the female cup member only, the mouth of the male member being inserted in the mouth of the female cup member and extending therein? in spaced relation from. the ?ange thereof, a ?tting 20 extending through one of said cup members, a support for said vessel surrounding said ?tting, the inserted portion of the male cup member being integrally brazed to the female cup mem ber, the ?tting and support surrounding the fitting being integrally'brazed together and to the adja cent cup member and said ?ange on the female cup member rigidifying the vessel. . RAY A. SANDBERG.