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Патент USA US2540926

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f Feb. 6, 1951
Filed March 31, >1947
4 Sheets-Sheet l
Feb. 6, 1951
c. c. YOUNG x-:T AL
Filed March 5l, 1947
4 Sheets-Sheet 5
Cy '/C?a//eâ
i [email protected]
Feb. 6, 1951
Filed March 31, 1947
4 _Sheets-Sheet 4
Patented Feb. 6, 19,51
Cyril Charles Young and Donald F. Troupe, Kan
sas City, Mo., assignors to The Vendo Company,
Kansas City, Mo., a corporation of Missouri
Application March 31, 1947, Serial No. '738,478
4 Claims.
(Cl. 126-20)
This invention relates to food processing ap
pliances of the kind particularly adapted for do
mestic or small operator use and has for its pri
mary aim the provision of cooking equipment
having means for treating food products, and
particularly those requiring moist heat, through
the application of steam.
The most important object of this invention is
to provide a steam cooker having a steam cook
ing compartment and a steam generating boiler
in communication therewith so formed as to move
live steam generated from fresh water in the
steam generating boiler into the cooking compart
provision of a steam cooker having a pressure
valve for automatically venting the cooking com
partments, said valve being also operable by the
aforesaid latching assembly to completely evac
uate theY compartment prior to opening its door.
Other objects of this invention include the
manner in which combustion gases emanating
from the heating burner for the steam generat
ing assembly are directed to a flue in such man
ner as to surround both the reservoirI and the
cooking compartment; the way in which air;
condensed steam, vapors and excess steam are
evacuated from the cooking compartment into a
specially formed condensate pan and thence into
-Another important object of this invention is 15 the flue; and the manner in which the entire as
to provide a steam cooker having means for main
sembly, including not only the Way in which the
taining steam Within a cooking compartment un
said compartment is evacuated but the way in
der pressure and structure for controlling not
which fresh live steam is directed into the com
only the amount of pressure in the compartment
partment, serves to permit cooking of any num
but also the temperature therein.
\ 20 ber of diiîerent types of foods simultaneously
A further object of this invention is to pro
without danger or intermixing of odors and
vide a steam cooker having a cooking compartf
flavors of such foods.
ment provided with an opening in a normally
Many additional objects will be made clear or
bottom wall thereof within which opening is
become apparent during the course of the follow
mounted a steam generating assembly in com
ing speciñcation, reference being had to the ac
munication with the compartment, said assem
companying drawings wherein:
bly comprising a boiler and a reservoir loosely
Figure l is a front elevational view of a steam
disposed within the boiler, the reservoir supply
cooker made in accordance with our present in
ing water to the boiler for conversion into steam.
vention, parts being broken away for clearness.
A still further object of this invention is to 30
Fig. 2 is a cross-sectional view taken on broken
provide in a steam boiler having the aforesaid
line II-II of Fig. 1 looking in the direction of
steamgenerating assembly as a part thereof, a
the arrows.
reservoir of ceramic material mounted within thel
Fig. 3 is a cross-sectional View taken on line
boiler and having its walls spaced from the walls
III-III 0f Fig. 2.
of the boiler to provide a space surrounding the 35
Fig. 4 is a cross-sectional view taken on line
reservoir creating a thin film of water for quick
IV-IV of Fig. 2.
conversion into steam, the boiler and reservoir
Fig.v5 is a cross-sectional view taken on line
being placed into mutual communication by open
V--V of Fig. 2.
ings in the side walls of the said reservoir.
Fig. 6 is a cross-sectional view taken on line
Another object of this invention is the pro 40 VI-VI of Fig. 2 and looking in the direction of
ment under pressure.
vision of a steam cooker having a cooking com
partment and reservoir extending thereinto, said
reservoir having an open top, a number of open
the arrows.
Fig. 7 is a fragmentary detailed cross-sectional
view taken on line VII-»VII of Fig. 2 on an en
ings in that portion thereof extending into the
larged scale.
compartment and closure overlapping said open 45
Fig. 8 is a fragmentary cross-sectional view
ings to avoid exchange of ñavors among the foods
taken on line VIII-VIII of Fig. '7 looking in the
during the cooking process.
direction of the arrows and
A further object of this invention is to pro
Fig. 9 is >an enlarged fragmentary elevational
vide a steam cooker in the nature of that above
described whereinsaid cooking compartment is 50
provided with a swingable door having an unique
latching mechanism operable to vent all steam
from the compartment before the door is opened
and upon manipulation of the said latch.
A still further object of this invention is the
View of the steam generating reservoir per se.
Many devices have heretofore been made
adaptable to process food by the application of
steam but such devices having automatic means
for controlling both temperature and pressure
have been impractical for home use or by small es
tablishments. The steam cooker about to be de»
scribed not only embodies these features but pro
vides an assembly of parts for simplifying cooking
of foods requiring moist heat, which cooker is sim
illustrated in Figs. 2 and 6. Removal of the lid
42 makes it possible for the operator to determine
Whether or not there is sufficient water within
ple to operate, requires little attention, maintains
the reservoir 44 by merely viewing the position
a certainty of uniform results and is adaptable not
only for preparing foods in open containers but
usable as a sterilizer and particularly adaptable
for canning.
Inthe drawings wherein like reference numer
of plate 62.
A fuel consuming burner 64 underlies the boiler
als refer to like parts throughout the drawings,
the numeral [email protected] designates broadly a cabinet hav
where the same is accessible to the operator.
ing framework I2 for supporting all the com
ponent parts of the steam cooker about to be de
scribed. A chamber I4 carried by this frame-V
work I2 has mounted therein a compartment
broadly designated by the numeral I6. This com
partment i6 is somewhat smaller than the cham
ber Ill as clearly illustrated in Figs. 1 to 5 inclu
sive and suitable brackets I6 on the walls of
26 and has a pipe 66 leading to a suitable source
of fuel supply (not shown) and a control valve
66 suitably mounted on thekface of cabinet I6
Wall 22 of compartment I6 is provided with a
second somewhat smaller opening 'I6 within which
is mounted a ñtting 'I2 for receiving a ñltering
cup 'I4 and one end of a conduit T6. This conduit
‘I6 terminates below the boiler 26 and to one side
of the burner lEiland is in communication with
a chamber 18. A bracket 86 within the chamber
'I8 is slotted as at 82 for receiving one end of an
arm 64 which end of arm 84 is off-set as at I86.
chamber Iii and compartment I6 respectively 20 A pair of legs B8 on the arm 84 carries a cap
96 Vfor movement to and from a position closing
serve to removably support the latter. _This com
partment I6 comprises the steam cooking cham
the end of conduit ‘I6 extending into the cham
ber 1B. A weight 92 secured to the arm 84 inter
ber and is provided with a number of horizontally
mediate its ends serves to maintain cap 90 against
disposed racks 26 in the usual manner. The nor
mally bottom wall 22 of the compartment I6 is 25 the open end of conduit 'I6 where the same is
closed. Thus it is clear that as the steam within
provided with an opening 24 near one end thereof
compartment I6 reaches a predetermined pres
within which is mounted a hollow boiler 26. This
sure, the same will pass outwardly through the
boiler 26 has an open top andan annular out
conduit 'I6 and actuate the cap 90 against the ac
wardly extending Ilange 23 overlapping the open
ing 24 in wall 22 when this boiler 26 is mounted 30 tion of the weight 92 whereby the steam is free
within opening 24._
A ring 3E] defines the open top of this boiler
26 and a number of bolts or the like 32 pass up
wardly through bottom wall 22, flange 28 and
to escape. Upon such movement of cap 96 out- _
wardly from the conduit '16, the escaping steam
will pass through an elongated slot 94 formed
in the cap 90 to create a whistling sound and
thereby notify the operator that such steam is
into the ring 36 for securing the boiler 26 to the
compartment I6. A portion of the upper-most
escaping. This cap 60 isy hollow and has a flat
plate covering the open end of conduit ‘I6 and it
edge of this ring 36 has a pair of cut-out portions
34 within which are formed a plurality of open
is in this plate that slot 94 is formed. The op
ings 36 for placing the boiler 26 into direct com
erator may then adjust the burner 64 by ma
munication with a compartment I 6. A closure 38 40 nipulation of valve 68 to lessen the amount of
steam passing ‘from boiler 26 into the compart
for boiler 26 overlies the cavities 34 and the
openings 36 as illustrated in Fig. 9 and this
ment I6.
The small chamberîß is open at its bottom to
closure 38 has an opening 40 therein closed by
communi-cate with an elongated condensate pan
a lid 42.
Loosely disposed within the boiler 26 is a hol
66 slidable on a top plate 98 mounted on the
low reservoir 44 formed preferably from ceramic
frame I2. One end of this condensate _pin 96
material. The cross-sectional area of this reser
opposite to the chamber 'I8 is in communication
with a venting flue m6 for the vapors or `other
voir 44 is less than the inner-most cross-sectional
area of the boiler 26 to present a relatively thin
condensate materials and this ilue I0!) is in turn
space circumscribing the reservoir 44 as at 46.
in communication with a gas flue |02 at its up
per-’most end. A jacket H34 completely sur
This space 46 is maintained and the reservoir
rounds the boiler 26 in spaced relation thereto,
4Q held out of contact with the walls of the boiler
and this jacket |64 depends from and is mountedV
26 by a number of indentations 48 embossed in
the boiler 26. These bosses 48 are also formed
upon the lower-most wall »of the chamber I4.
This jacket H34 is in communication with the
in the bottom wall 50 of boiler 26 to hold the
chamber i4 as at IE6 and extends downwardly
reservoir 44 upwardly out of engagement with
and around the burner 64. Chamber I4 has'an
this bottom wall 56 to the end that the thin
outlet opening |68 into the flue I6'2 and it is
space 467‘completely surrounds the reservoir t4,
clear that the burned gases emanating from the
all as is clear in Figs. 2, 4 and 6. The reservoir
burner 64 will pass upwardly into jacket |64,
44 is placed into communication with a Vboiler
26 by a number of openings 52 formed in the
>chamber I4 and into the flue |62. The A path of
reservoir '44 and near the bottom wall thereof.
travel of thesegases is clearly illustrated by ar- '
’This reservoir 44 is adapted to contain a filling
rows in Figs. 2 and 6 showing the way in which
of water 54 which is free to flow from reservoir
these hot vapors completely surround the boiler
44 through openings 52Y into the space 46 of boiler
26 as well as the compartment I6. This feature
26, thereby creating a thin film of Water sur
serves to fully utilize all the heat from the fuel
rounding the reservoir 44.
An L-shaped arm 56 is swingably . carried
within the reservoir 44 by the closure 38 and a 70
ñoat 5B is mounted upon the free end of this
arm 56. This float 58 carries an upstanding wire
6B having a flat plate 62 on the uppermost end
used by burner 64 in heating not only boiler 26
but compartment I6.
The frame I2 has swingably mounted there
on, through the medium of a suitable hinge as
sembly I I0, a door broadly designated by the nu
meral H2. rIfhis door II2 is sectional and Vhas
mounted therein a latch assembly designed to
thereof and adjacent to the opening 4D in the
closure 33 when the level of the water 5t is as 75 not only hold door IIZ in the closed position- as
2, 540,924
illustrated in Figs.` 1, 2 and 3 butto actuate the
pressure valve above described disposed within
the chamberlS. This latch assembly includes
an exteriorly mounted handle Ile which ek-`
tends into the interior of door ||2 and joins
with _a disc IIB through the medium of a stub
shaft IIB. This disc H6 has a groove IZB formed
on one edge thereof to cooperate with a hook
|22 on frame i2 in holding door H2 in the closed
position. Door ||2 is provided with an opening
|24 >forrreceiving the hook |22 when the door
isclosed whereby the hook |22 is disposed in
the _path of travel of the disc lit. The groove
I 2S of disc I I6 only partially circumscribes the
periphery of member H6 to the end that when
handle ||4 is swung to the “open” position illus
trated in Fig. l, the cam member [email protected] and the
hook |22 are disengaged, permitting opening of
door H2.
|52 respectively. When the'whistling sound, made
by passage of steam into slot 94 and thence into
cap 90, is heard, the operator simply actuates
valve 68 to decrease the amount of heat in burner
After the cooking process has been completed
the operator actuates handle IIll to move the
same from the “cook” position to the “vent” posi
tion. All steam within compartment iii is then
evacuated into condensate pan 96. Upon further
movement of handle Illi to the “open” position,
the door ||2 may be opened and there will'be
no out-rush of steam from compartment I6 to
strike the operator.
Manifestly many changes and modiñcations
may be made in the steam cooker forming the
subject matter of this application, particularly
in the details of construction without departing
The shaft Ilil carries a plate like cam
from the spirit of this invention or scope of the
|25 within which is disposed the disc Iiiì. This 20 appended claims.
cam is substantially circular and is extended as
Having thus described the invention, what is
at |26 to engage and actuate reciprocable rod
claimed as new and desired to be secured by Let
|28 within the door H2 when the handle lili
ters Patent is:
is swung to the “vent” position illustrated in
1. In a steam cooker having a frame provided
Fig. 1. This rod |28 is vertically disposed and 25 with a steam cooking compartment having an ac
slidably mounted in a pair of brackets |35 ñxed
cess opening in one side thereof, a closure for said
within door H2. Rod |28 extends downwardly
opening shiftable to and from the closed position,
through an opening in the bottom wall of door
and steam generating means for the compart
||2 and a spring |32 yieldably maintains rod
ment; a pressure actuated valve for governing the
|28 at the upper-most end of its path of travel.
flow of steam or condensate from the compart
An L-shaped link |3£| is pivotally secured to
ment; a manually operable latch shiftable in one
a plate |52 as at |3ß and this link i3d. has a
direction to a position where the closure is locked
projection |38 extending outwardly through a
in a shut condition; and linkage shiftable to and
slot IM! formed in the face plate M12 of the cab
a position opening the pressure valve, said
inet I0. This projection |38 directly underlies _ . latch having a part engageable with the said link
the lower-most end of rod |23 projecting out
age after the closure is locked shut, and upon
wardly from door H2. A spring Ilifi yieldably
further movement of the latch in said one direc
maintains link |35 in the position illustrated in
tion, to shift the linkage to said position where
Fig. 1 where extension |33 is in contact with
the valve is opened and said compartment is
rod |28 and where one leg of link i3d opposite
‘il evacuated.
to the leg thereof having extension |38 thereon
2. In a steam cooker having a frame provided
rests upon a bracket lst mounted upon the in
with a steam cooking compartment having an
ner-most face of plate |42. An L--shaped link
access opening in one side thereof, a closure for
|48 has one end of one leg thereof pivotally se
said opening shiftable to and from the closed po-cured to the free end of link i3d as at |53. The 45 sition, and steam generating means for the com
other leg of this link |48 extends to overlying
partment; a pressure actuated valve for governing
relationship with the chamber ‘it and a pin |52
the flow of steam or condensate from the com
slidably mounted in an opening läd in chamber
partment; a manually operable latch shiftable in
’|8 passes through an opening in link |33 and
one direction to a position where the closure is
into a slot |56 in arm 8|! to interconnect th 50 locked in a shut condition; linkage shiftable to
and from a position opening the pressure valve,
It is clear therefore that when handle Iiëi is
said latch having a part engageable with the said
in the “vent” position, projection |25 of cam
linkage after the closure is locked shut, and upon
member |25 will contact the rod @28 to actuate
further movement of the latch in said one direc
links [email protected] and |38 and the links will thereby pull
tion, to shift the linkage to said position where
pin |52 upwardly to move cap 9e to the open
the valve is opened and said compartment is
position with respect to the conduit 1S.
evacuated; and yieldable means for holding the
In all other positions of handle ihi, namely
valve in a normally closed condition, said linkage
the “open” or the “cook” position, the projec
being inoperable when said latch is shifted to an
tion |26 of cam |25 will be out of engagement 60 unlocked position.
with the rod |28 and the cap 3|) will thereby
3. In a steam cooker having a frame provided
be free to be actuated by excess steam from corn
with a steam cooking compartment having an ac
partment Iii. This is made possible by the slid
cess opening in one side thereof, a closure for
ing relationship with respect to arm 8d and pin
said opening shiftable to and from the closed po
|52 within slot |56.
sition, and steam generating means for the com
It is clear from the foregoing that the steam
partment; a pressure actuated valve for govern
cooker just described is virtually automatic in
ing the flow of steam or condensate from the
all respects. When the burner Eil is lighted,
compartment; a latch having parts on the closure
steam will be generated quickly within the thin
and parts on the frame, certain of said parts on
chamber ¿iii to pass upwardly under pressure
the closure being manually movable through a
through the openings 36 and into the chamber
path of travel during the ñrst portion 'whereof
I6. Upon a predetermined amount of excess pres
said certain parts on the closure interconnect
sure in compartment it valve 9i) will automatical
with certain of the parts on the frame to hold
ly open and such excess pressure will flow into
the closure shut, said certain parts on the closure
condensate pan 9B and thence into flues |00 and
being formed to engage and actuate other parts
on the closure and frame respectively as the
latch is moved through the last portion of its path
of travel, said other parts on the frame being dis
The following references are of record in the
posed to engage and open the valve to exhaust
the compartment when the former are actuated. 6
4. In a steam cooker, a normally-closed steam
ñle of this patent:
' 692,516
Higgins ____________ __ Feb. 4, 1902
vided with an opening; a steam generating boiler
provided with a top wall in said compartment and
Bruck _____________ __ Aug. 6, 1907
Williams ________ __ June 22, 1920
mounted in said opening in depending relation
ship to said bottom wall, there being a plurality
of steam outlet openings in the sides of said boiler
below said top wall and spaced above said bot
Duncan ___________ __ July 4, 1922
McKenna ________ __ May 17, 1927
’Bryson ___________ __ July 14, 1931
cooking compartment having a bottom wall pro
2,069,693 `
tom wall; and a valved outlet passageway for ex
cess steam and condensate emanating from said
steam compartment, said passageway registering
with said bottom Wall in a plane below the out
let openings of said boiler.
Barrett ___________ __ Feb. 2, 193'?
Great Britain ______ __ May 3,
Austria __________ __ Oct. 10,
Great Britain ____ __ Sept. 19,
Great Britain ______ __ Feb. 3,
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