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Патент USA US2407627

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SePt- 17. 1946
J. H. CHANDLER
- 2,407,627
` PRESSURE COOKER
Filed Aug; 12, 194:5
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Sept. 17, 1946.A
J. H.`cHANDLER
2,407,627>
PRESSURE cooKER
Filed Aug. 12, 1945
m
-2 Sheets-Sheet 2
Patented Sept. 17, 1946
.
2,407,627
UNITED s'm'rEsV PAT-ENT ori-‘NICE
PRESSURE COOKER
James Harvey Chandler, Oak Park, Ill., assignor to
Ekco Products Company, a corporation of Illi
‘
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nois
Application August 12, 1943, Serial No. 498,347
(Cl. 22.0-25)
3 Claims.
l
.
This invention relates to pressure cookersof
the< type wherein an annular portion of the clo
2V
ment of a closure I5 `of this invention may be
effectively used. As illustrated, the vessel is of
cylindrical shape having its side wall terminat
sure or cover extending beyond the area' thereof
corresponding to the area of the closure receiv
ing at its upper limits in an inwardly and down
wardly curled edge I l to deñne a mouth or' open
ing opening is adapted to be confined within the
container through upward pressure of said an
ing at thel top of the vessel through which the
nular portion of the cover against an `internal
contents of the vessel may be introduced or with
drawn. The curled edge II is adapted to re
It is an object of this invention to provide a
ceive a suitable gasket or packing member I2 in
Yclosure for use 'in conjunction with `an internal 10 such a manner that the member I2 thus pro
seating arrangement of this character embodying
vides an annular downwardly facing seat within
the vessel.
features of construction whereby the introduc
The closure i5 is circular in plan so as to pro
tion and removal of the closure are facilitated.
`This invention‘accordingl'y contemplates the
vide an annular portion adapted to underlie the
annular seat around the opening.
‘
Vuse of a closure adapted to be temporarily flexed
seat formed `by the-member I2 surrounding the
closure portion corresponding to the area of the
linto a shape wherein its dimension is sufficiently
reduced to be passed throughthe cooker opening
mouth of the vessel I0.
toward and away from a position below the an
nular seat within the cooker receptacle through
the action of flexing mechanism directly asso
terial which contains suiiicient resiliency to per
20 mitof a certain amount of distortion (under the
ciatedV with the closure.
These and various other objects and advan
tages are attained'with this invention, as Will be
lapparent from the following description, taken
in connection with the accompanying drawings
wherein the invention is shown in its preferred
form, it being evident that other forms of con
struction and modifications may be adopted in
`carrying out the objects and purposes of this
invention.
In the drawings:
The closure is made of
relatively thin sheet metal or other suitable ma
‘
Fig. 1 is a side elevational view with parts of
the cooker receptacle in central vertical section,
`action of flexing means associated with the clo
sure and more fully hereinafter described) where
by it may be temporarily sprung into a shape
inserta-ble through the~mouth of the vessel as
shown in Figs. 4 and 5, during movement toward
and away from a position wherein the `annular
portion of the closure underlies the seating mem
ber I2.
`
`
` Means for temporarily flexing the closure I5
30 are preferably provided through the use `of a,
yoke or bar I3 adapted to extend across the Vclo
sure I5, in the manner sho-wn in Fig. 3, which
yoke has a central aperture or bearing through
’illustrating the arrangement of parts when the
which an axially projecting cylindrical stem or
closure embodying the present invention is in 35 post I4, fastened as at I6 to the center of the
operative relation to the receptacle.
closure l5, may project. The collar I‘I fixed to
the stem I 4 provides a stop against which the
Fig. 2 is a similar view, `with parts omitted
`yoke I3 may bear to prevent withdrawal of the
and a part of the receptacle broken away, illus
stem I4 from the yoke. Movement of the ste-m
trating the device shown in Fig. 1 when turned
through an angle of 90 degrees.
40 I6 relative to the yoke I3 from a position where
in the collar I'.’ is engaged by the yoke I3` as
Fig. 3 is a fragmentary top plan view of the
shown in'Fig. 5 to aV positionwherein the collar
same.
.
`I‘I is` spaced upwardly therefrom accordingly
Fig. 4 is a side elevational view with parts
causes the ends of the yoke to press against dia
rof the cooker receptacle in central vertical sec
tion, wherein the closure is shown in ñexed shape 45 metrically'opposite surface portions of the clo
sure I5 inwardly from the annular portion of the
and prepared for insertion through the closure
receiving opening of the receptacle.
closure normally adapted to engage the seating
member I2 whereby the closure is warped or
Fig. 5 is an enlarged vertical section taken
, iiexed on an axis perpendicular to the longitudi
online 5-5 of Fig. 4, with part of the recep
Reference being had more particularly to the
drawings, the numeral I0 designates a pressure
nal axis of the yoke I3. It will be observed that
sliding movement between the opposite ends of
the yoke I3 and the surface of the closure con~
tiguous thereto incident to flexing of vthe cover
is facilitated by giving a rounded or bulged shape
_vessel of a type with which a preferred embodi- à
Vto said yoke ends. -The yoke I3 is also provided
tacle included to indicate relative width of the
closure and the closure receiving opening when
the Aclosure is ñexed as shown.
‘
‘
2,407,627
4
3
as to provide a more effective leak-proof seal
between the seat member I2 and the surface of
the closure I5. In order to provide a vent through
which steam pressure may be released as desired,
with a lateral extension or support I8 into which
the shank I9 of a handle ZIJ may be fastened.
The handle 20 is preferably of such length as to
overhang the handle 2l secured to the side wall
>of a vessel I0 through a ferrule 22, when the
closure I5 is in operative position as shown in
the stem Iâ is preferably hollow throughout its
length thereby fonming a passage in communi
cation with the interior of vessel Ill. Under this
arrangement the upper end of the stem I4 pro
the drawings.
Pivoted at 23 between the upper ends of a pair
of spaced parallel arms 24 rprojecting upwardly»
from the outer end of the bracket or support I8
for swinging movement in a vertical path in
alignment with the longitudinal axis of the clo
vides a seat for a suitable valve such as a weight
The inwardly projecting end of the lever 25 is
34 as shown in Fig, 5. A safety steam vent in
the form of a rubber plug 35 may also be fitted
on the closure I5. The particular type of fittings
described and shown herein are, however, merely
indicative of any suitable form of fitting adapted
forked as at 26 for the purpose of embracing aA
for use in connection with a pressure cooker as
sure handle 20, is a lever 25.
lportion of the stem I4 between the collar I"I and
contemplated 'by this invention.
a similar collar or projection 21 fixed to stem I4
and spaced upwardly from said collar I‘I. Y The
closure I5 is accordingly forced into a diametri
ple as a circular disc of sheet metal stock of .018
A thin flexible closure member, such for exam
inch to .020 inch thickness, of suitable spring
cally warped shape against the opposite ends of 20 temper, with only the use of a relatively fiat
smooth peripheral face portion in Contact with
the yoke I3 through pulling force exerted on the
the underside of a rigid circular annulus sur
stem I4 upon upward swinging movement of the
rounding the opening in the top ofA a container,
forked end of the lever 25. A thumb-piece 28
such for example as a two-quart capacity drawn
carried at the free outer end of the lever 25 pro
vides a bearing which the user may press with 25 cylindrie vessel of sheet metal stock of .040 inch
thickness, corresponding substantially to the
the thumb of the hand which grasps the closure
shape of vessel I5 as shown in the drawings,
handle 25 whereby the lever 25 is easily operated
including an inwardly curled edge II, is illustra
to cause flexing of the closure. Upon release of
tive of one preferred embodiment of a pressure
V(pressure on the thumb-piece 28,'the resiliency
of the closure will immediately cause it to` spread 30 container as contemplated by the present inven
tion.
or relax into normal shape effective to position
However, it will be apparent that various
changes might be made lin the structure and de
the annular edge portion thereof in a plane effec
tive to engage the seating member I2. Because
sign of the elements involved in said example to
stem Ill provides a bearing or` pivot on which
form a pressure container of the general char
. acter described, all without departing from the
the yoke I3 may turn, the axis on which the
closure> I5 is warped as described herein, may ‘be
varied as the relative angular position of the
yoke I3 is changed with respect tov a selected
spirit of this invention as defined in the annexed
claims.
»
f
This ar
What is claimed is:
l. In a pressure cooker, a vessel having> an
rangement rnakes it possible to avoid a perma
nent “set” or Warped shape in the closure mem
40 opening through which contents of _ the Vessel
_ may be admitted or discharged, a downwardly
diametrical line across the closure.
ber i5 when it is no longer sub-jected toexternal
iiexing stresses by the yoke I3, .which might
otherwise develop where bending or flexing is
facing seat within the vessel `surrounding said
opening, means engageable with said seat to seal
said opening including a flexible closure member
confined to the same axis each time the closure 45 having an annular portion extending peripherally
beyond the area thereof corresponding to the area
is applied to or removed from the seat I2.
of said opening and adapted to betemporarily
After the closure I5 is confined within the ves
flexed into a shape enabling its passage Vthrough
sel and released from pressure of the flexing
mechanismes above described, the closure I5 is
adapted to be lifted into a position against the'- v50
seating member I 2 by rocking the closure handle
20 toward the vessel handle 2l, A suitable ful
said opening toward and awayfrom a position
wherein said closure engagesV said seat, a rigid
yoke member having contact faces presentable
projecting leg 29 provided at the inner end of
the handle 2i] which leg is adapted to pivot in a¿
toward upper surfacel portions ofthe closure in
downwardly advanced position relative tothe
central portion of the yoke against whichvdia
metrically opposite upper surface portions of the
_recess or seat 3i) on the ferrule 22 of the vessel
handle 2 I. The closure is preferably held in place
closure located inwardly from its annular portion
may be drawn upwardly to ñex the closure> into
against the seating member I2 by any suitable
a shape enabling its passage through said vessel
opening when the central portions of said yoke
crufm for this purpose consists of a downwardly
means such, for example, as a latch 3| mounted
for swinging movement on the handle 20 toward
and away from a position in engagement with
the vessel handle |‘2I as shown in Figs. l and 4.
As the closure I5 is moved upwardly toward the
seating member I2 through rocking movement of
the closure handle 25 on its rpivot as aforesaid, '
a pair of ridges 32 and 33 at transversely oppo
site internal sides of the vessel I0 and arranged
vertically below the seat I2 are adapted to be
engaged by the edges of the closure I5 whereby
the closure may be easily guided into a central ~
position with reference to the mouth of the
and closure are in vertical alignment, means for
maintaining said central portion Yof the- yoke and
said central portion of the closure in vertical
alignment including a stem fixed to andproject# Y
ing upwardly from the central portion of the
closure, said yoke and stem being connected for
relative movement axially of >said stem between
an advanced position wherein said closure is
placed under strain by said contact faces of the
yoke to flex the closure into a shape enabling its
passage through the vessel opening and an initial
position wherein said closure is freed from strain
vessel.
to resume its normal uniiexed shape, a handle
tightly pressed against the seat member I2 so
having a forward portion fixed to said yoke and
a rearward portion which projects laterally be
yond the edge of the closure and about which a
As pressure is built up within the vessel I0 it
is apparent that the closure I5 will be more
2,407,627
6
hand may be flexed into operative position to
support the closure, a lever movable about an
axis in fixed relation to said yoke and operatively
engaging said stem for moving said stem from
initial position to advanced position relative to
position relative to said yoke through the agency
said yoke, said lever having a free end operable
in such proximity to the handle throughout', the
travel of the lever between initial and advanced
positions of the stem relative to said yoke as to
be within range of normal movement of the
thumb of the hand operatively flexed about said
handle whereby the lever may be operated to
move said stem from initial position to advanced
with the interior of said vessel when said closure
is in engagement with said seat including a pas
of pressure applied on said free end of` the lever
by said thumb.
2. In a pressure cooker as deñned in claim 1,
means providing a steam vent in communication
sage extending lengthwise through said stem.
3. In a pressure cooker as defined in claim 1
wherein said yoke and stern are connected for
relative pivotal movement about said stem as an
axis.
JAMES HARVEY CHANDLER.
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