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Патент USA US2113060

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April 5, 1938.
Filed Sept. 2, 1957 '
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Patented Apr. 5, 1938
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.
vide strong spherical-tanks formed from sheet
It is thenan object of this invention to pro
Mechanical refrigeration systems of the com
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
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.
? Another object of this invention is to provide
10 the evaporator, a tank or closed receptacle for
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
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
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.
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
? 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?
-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
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.
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
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
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
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
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
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.
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
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.
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
_ in Figure 6. Even though the parts are snug
?tted together~ the brazing metal-will ?ow \be
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.
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. ?
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
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
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.
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
thereof, I ?ttings
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.
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