Document 374688

April 28, 1953
w. J. DURIN'G, SR., ErAL
Filed Aug. 20, 1947
3 Sheets-Sheet 1
April 28, 1953
w. J. DURING, SR., Erm.
Filed Aug. 20, 1947
5 Sheets-Sheet 2
April 28, 1953
Filed' Aug. 2o, 1947
w. J. DURING, SR., Erm.
3 sheets-sheet 5
Patented Apr. 28, 1953
'PRESSURE ’co'oKoR-f ionosmm
William J. During, sri, and WilliamJ;nuring,g1r.,
Fayetteville, NÄYL.
‘ Application Aug-ust 20, 71,947;l SerialiNoffïßßdäW
`2. Claims.
(Cl. 220440));
cookersfoñ` theikin'd‘. eomprisingf a cooking re‘cep~
tacl‘e’vorf vessely anda> detachableV closure` or ycoter
Whichgfwhen the cooker is1in` use, are held: «inra
` sure responsive: valvel operative, to` prei/ent.l pres
sure; ‘ini >t'heß‘xoooker1frorrrexceeding; a selected`
tight“ sealed' engagement-.r in'` which theyr ptovide‘fa 5
pressure tight-cooking- chamber;
1 'Blier principal»objectV of the'. invention is to.v pro*um
Other objects and advantages of the inventionv
\ willi` animanÁ from. the; fol1owing;.description in de
vidr‘ffa‘.;@pressureV cooker of the, aforesaid `kind
whi'chß‘willï functiomeiiîciently, is `of simple con
tail ofathe two; .illustrativeI` enibodiment’s`A of- the,
inventionA illustrated: thee; accompanying. draw
struction,` `an‘clJomy"be' used. with ‘ ease and safety; 10
~A further object of' tlîi’e` invention is toV pro
vid’eia pressure. cooker off thevaforesaidlkind loav-l
iinprove'di means; for „releasably‘ securing` 'the
vaiveswone? oñaiwhich
a.A thermallyr> responsive
safetyfvalve and the other-oneof:whicnis apres
»Thea »invention - relatesv "primarily'y tol ‘ «pressureY
«ini the,l drawings, like: `reference l characters.
‘ designate correspondingiparts..
Figurer l isi a side elevation-,ot apressurevcookf
er, embodying; theinvention;
furthert object fof the rirmention is`V to provide f 15
Figure 2'J isz as; topîfplan ViewI for. said.. cooker;
aipressurezcookeriof’ 'the aforesaidll‘kind wherein
Figure: «3` .is fragmentary-f sectional; View taken
theïfcl‘osureë and receptacleportionsot the cooker
areispiiovided with meansy Whi'chl‘are- engageable‘
Rigore. esista. fragmentary. sectional View: taken
byi rel'ai'flwe;rotationooñl said1 portions to seatv the
omtheilines=âf~4i~4i---4 ofzFigunezZi;
closureA portionl tightlyJ on vthe receptacle portion!
aaviewzf-:taken ‘onathez line `5,---5 of
and securely» interlockfsaidf portionsiof the cooker;
and;xrflflrereinf1 one ofiv said portions off the cooker
hfasrmanuallyf* movable means'- mounted? thereon
anden'gageable Witlrftl'le` otherfportion of'tlïie`
Figure 'Irwisrawiew takenronythexlinei 1`--~1r of
cookerl for relatively.` rotatingA said portions ofl 25 Figur-e153;
tlievcooker into and out» of' interlocked? relation»
«Eiguref'ßi israriperspeetive Viewa'ot a part: of'ïone
of; the L means fot "ßeiîeetingi relative ' Arotation " of
A further object of tlïie invention isv ’to-‘provide
aL-"pressure` cooker ofïthe` aforesaid kind ‘which
‘[email protected] is"` a: detail viewffshowingf a feature of
is readily»l portable and inß‘whi‘ch‘ithe'rec'eptacle 30 theacookeryandi
andra«closure` `are relatively-rotative into and
Figures-windt l-lf; area views: similark respective
u 1y i toì Figures:94;;> amil 6'.“- and showing ai `modiñed
out’` Lof cooking" chamber form-ing interlocked'" en
form ¿of J cooker‘iembodying: thel invention; Figure
gagement “by two ‘driving means" which 'are ‘ar
11` being assectional’iïView»` takers or:1 the line ifi-_l1 I
rangedL at" opposite `"sides ofthe cooker‘to'be 1o
cat'ed externallyu of. the cooking "chamber, ` andA 35 o? Figure 11m
`'Thefco‘olteit-r\slïiovimini Figures; to; g‘iwill be first
each, of.` which, driving .means comprises a lift»
ing„.lia.ndle„located et the upper side of. the, clo~
The-icookeif' includes:Y ian‘fopen` top»v receptacle
sure and heldto the closure for‘rotationot said;
|101; .preferably formed?rot‘ cast" metalll said: \
handleu mea-ns rotative,` by` said handle;` and; fixed
receptacl'eibeing tormediwi‘tl’r a cylindrical- upper
meansonf‘the receptacle with which said rota
portion and?preferablyï'being substantiaily cylin
tine; means ist` ~coactiva toil effect.relative;l rotation
dri‘ca'lîy throughoutìitsvdepthl rvThe receptacle» is
between‘xthe closure andlfreceptacle wifi-enl the
seata‘ble iiiran» kupright?position`-` `and has extend
handle'ri'sxrotated in'v eachdirection.
ingl 4radially1 'outwardßltherefromí »at~ ldiametrically
9A: iìurthen object of» the invention" is Yto provide» 45 "opposite:rpoilits‘ttwo-‘fprojections- l if' `Which are
a- pressurev coolserf li'avin‘g‘~ a receptacle and cl`o-sure relatively rotative into and out `oiîïan‘ intere
lockedzrelationlin: wiiiel‘ii` they »form sea-led cook
ingfclîiamber, and means ‘responsive to pressure*
‘fixedl'yeï lfie'liirtofthereceptacleandp preferably are
' integral therewith.
The projections lli 'are 1o"
catedîl' as snortf` distancei‘belowf- the» top' of the re~
cept-‘acle andi form -tlie‘ inner'parts of*V twohandles
in'l `.thel` cooker: to» look the closure" andL receptacle 50 for ' the receptacl
ag‘ainst . rotation: oiit‘f of " said inter-locked relationy
'f-Eacli' »handle>vv` has la' second
orfiiandigripfpart» I’Ifßlvvliibl’rextends> out fromy be-l
While: pressure. in the.; cooking chamber equals or
neatnr part H‘» thereof'f‘radi’allfy'of" the“ receptacle
exceeds a selected low pressurev `at Which-‘it `is
andt is-"ñ'netll‘yilïie-ldï‘to-itsf‘associated part `H by
su‘itableffastening-means I’Ib,“>‘said" parts; l I'a of
»A fuit/hen obj eictsof“ the invent-,ioni is to> yprox/ide \ 55 tlïieïf` handles# preferably' being formed’ of heat in'
a-ipressure: Afcoolieia ¿thaw-ing
improved' co-~
ordinated'rt-arrangementl et" two «pressure relief?
‘Thefßcoolierl‘ineliidesea ‘detachable closure or `
cover adapted to seal the receptacle when inter
locked therewith, said closure having a top wall
i2 which is preferably formed of cast metal and
is formed with an integral pendent annular
flange i3, the top wall being preferably of dome
like forro. rThe closure flange is recessed part
way up `from its lower edge at the inner side
of the flange to loosely receive in the recess the
cylindrical upper portion of the receptacle and to
scribed permits them to be easily wedged into
a tight-holding frictional engagement which will
securely hold the closure and receptacle inter
locked against accidental relative rotation in
closure releasing direction.
The sets of lugs or
locking wedges will positively interlock the clo
sure and receptacle against direct axial separa
tion while the lugs i5 are engaged under lugs i6
and, by reason of their aforesaid Wedge shape,
provide on said flange a downwardly facing an 10 will securely hold the closure and receptacle
against accidental rotation out of interlccked
nular shoulder ite adapted to overlie the top
relation even while the lugs l5 and it are only
edge of said upper portion of the receptacle.
slightly overlapped. The wide sloping faces of
ri‘he closure preferably also includes an annular
the lugs also afford a relatively wide range of
sealing gasket is which is preferably formed ~of
wedging action to insure tight sealing of the
compressible material, such as rubber, and has
its outer portion confined in an annular groove
The sizes and spacing of the lugs of the two
which is formed in the recessed portion of the
sets of lugs are such that the lugs iii may be
closure flange along the shoulder ita. The inner
passed vertically between the lugs it when the
portion of the gasket abuts shoulder lita and is
seatable at its bottom face on the top edge of the 20 closure is rotated slightly counterclockwise as
viewed in Figure 2 from the position thereof
receptacle for compression of the gasket between
said shoulder and receptacle edge to form a pres
shown in` the drawings.
sure-tight joint between the receptacle and clo
closure and the lugs IE on the receptacle serve
to approximately center the closure on the re
The lugs i5. on the
The receptacle and closure are provided with 25 ceptacle for relative rotation of the closure about
a common axis which is normal-to the seating
means whereby, while the closure is fitted on
plane of the receptacle. Preferably the recep
the upper portion of the receptacle, relative rota
tacle is provided adjacent each projection il
tion between the closure and receptacle in one
with an arcuate projection lee to assist in so
direction about the vertical axis of the cooker
will draw the closure and receptacle together 30 centering the closure on the receptacle.v The
closure and receptacle preferably are provided
into tight sealing engagement and will positively
with arrow-shaped indicia il and i8 at the ex
interlock them against direct axial separating
terior thereof which, when in -vertical register,
movement and securely frictionally lock them
position the lugs l5 for verticalpassage thereof
against accidental reverse rotation, said means
being releasable, upon relative rotation between 35 past or between lugs i6 with the thinner edges
the closure and receptacle in the opposite direc
of the two sets of lugs closely adjacent. When
the closure is fitted on the receptacle with the
tion, to free the closure for lifting thereof on of
indicia ll and i3 in register, the closure and
the receptacle. Said means comprises a plu
receptacle may be interloeked and released vby
rality of substantially flat lugs or projections l5
which are formed on and extend radially inward 40 relative rotating movements of small amplitude.
The cooker is provided with means whereby
from the closure iiange iii adjacent the lower
a user may handle the closure with ease and
edge of the flange and are arranged to lie flat
safety and may effect relative rotation of the
wise in a common horizontal plane parallel to
closure and receptacle into and out of inter
the seating plane of the receptacle when the
closure is applied to the receptacle. The lugs l5 45 locked relation with ease and dispatch, which
means will now be described.
1. , „
are of wedge form and have their top faces slop
The closure is provided with two projections
the same direction circumferentially of
2li which extend` radially and horizontally out
the cooker entirely across each lug at'an angle
ward from the flange i3 of the closure at dia
to said common plane which is within the angle
of repose or friction. Six of the lugs l5 are pro 50 metrically opposite points and which preferably,
as shown, are of approximately the same shape
vided in the construction of cooker shown in the
and size in plan as the projections ll on the re
drawings. A corresponding number of corre
ceptacle. _ The projections [email protected] arel ñxedly held to
spondingly spaced substantially flat lugs or pro
and preferably are formed integrally with the
jections iii are` formed on and extend radially
outward from the receptacle adjacent the top of 55 closure andare adapted to overlie projections ll
without contacting the latter when the closure
thereceptacle and above the level of the recep
is in sealed position on the receptacle` Above
tacle handles. The lugs it are of wedge form
each projection 2li, and abutting a flat upper sur
and are arranged iiatwise in a common hori
face portion of the projection, is one of two knobs
zontal plane parallel to the seating plane of the
receptacle and have their bottom faces all slop 60 or handles 2l each of which preferably is formed
ing relatively to said plane circumferentially of
the cooker entirely across each lug atthe same
angle to said
at which the `top faces of
lugs i5 are sloped relatively tothe plane 'of the
set of lugs l5.
lThe two sets of lugs i5 and lb are so arranged
on the closure and receptacle that lugs I5 are
wedgeable under lugs le (as shown in Figure 9)
of heat insulating material. Each such knob or
handle is fixed by a pin 23 to the upper end of a
.different one of two vertically disposed handle
' shafts 22, each of which is journaled in a differ
65 ent one of the closure projections 2B. Each shaft
22 has ñxed on its lower end coaxially With the
shaft a disk 2c which is seated in a downwardly
.facing recess in a flat bottom face of the projec
tion 2i! in which the shaft isjcurnaled. lEach
to draw the closure down on the receptacle and
compress the gasket lli between the aforesaid 70 shaft is held against axial movement by the knob
and disk nxed thereto.
closure shoulder its and the upper edge of the
Each disk 2li is formed with a depending ver
receptacle with the lowerl edge of the closure
tically disposed crank or wristpin 25 which is
flange i3 out of contact with the receptacle and
the receptacle handles, as shown._ The shapes of
eccentric to the axis of the associated disk and »
the, lugs of the> two l_sets of wedge-like _lugs de 75 shaft.'` The recess in the bottom of each closure»
In Figures 10 and 11, the parts are shown in
or partly melt sufficiently to be blown out of
sleeve 66 by pressure in the cooker.
the relation thereof which exists while the clo
When so
blown out of the sleeve, the plug will strike the
pivoted end of arm 43 and be arrested thereby,
or its velocity substantially spent, so that li
ability of the plug doing damage or injury when
blown out is avoided. The boss 45 and valve
casing 40 also assist in trapping a blown plug
The cooker also may be provided with a latch
or lock which, when the closure and receptacle
sure and receptacle are interlocked in tight sealed
are interlocked, is responsive to pressure in the
forms of cooker are of like construction.
relation. Upon simultaneous turning of the han
dles and pinions in the direction indicated by
the arrows ‘H (Figure> 11), the pinion teeth
will act on the rack teeth as drivers and cam
the closure into non-interlocked relation with
the receptacle and contrarotation of the pinion
will cause interlocking of the closure and re
ceptacle. Except as pointed out above, the two
We claim:
l. A pressure cooker comprising a receptacle
cooker to positively prevent manual. relative turn
ing of the closure and receptacle out of interlocked relation so long as such pressure exceeds
having two radial projections located at opposite
a selected value at which it is safe to release
the closure.
For this purpose, there is threaded upward into
radial projections located at opposite sides of its
rim, said receptacle and cover being releasably
sides of its rim, a detachable cover having two
a recess in one of the closure projections 29 a
engageable with said projections substantially
small piston cylinder 58 which is open at its
upper end. Slidable vertically in this cylinder
coinciding and being relatively rotatable about
is a piston 5l having a stein or latch pin por»
out of an interlocked relation in which they
form a sealed cooking chamber, an upwardly
facing cam groove in each of said receptacle pro
a common vertical axis while so engaged into and
tion 56 pendent therefrom and extending slid
ably through an aperture in a bottom end wall
of cylinder 58. An expansion spring 59 normally
holds the piston lifted with the lower end of
the pin or stern 56 slightly above the top or”
the underlying receptacle projection i l while
the cooker is assembled and there is insuiiicient
pressure in the cooker to depress the piston :l
against the resistance of spring 59. A passage 92
extends from the inner side of closure iiange
i 3 into projection 29 to a point over piston 5l.
With the cooker assembled for use, the piston
51 is depressible by pressure of a selected small
jections, two handles having shafts journaled in
and extending down through said cover projec
tions, and a pin eccentrically ñxed to the lower
end of each handle shaft and rotatable there
with in engagement with one of said cam grooves
to e?fectrelative rotation of the cover and re
ceptacle by rotation of said handles While the
cover and receptacle are engaged.
2. A pressure cooker comprising a receptacle
having two radial projections located at opposite
sides of its rim, a detachable cover having two
radial projections located at opposite sides of its
down into
in the
a recess
cooker 99
to formed
drive the
in stem
the underlying
or pin
rim, said receptacle and cover being releasably
engageable with said projections substantially
coinciding and being relatively rotatable about
receptacle projection il and prevent sufficient
relative rotation of the closure and receptacle
a common vertical axis while so engaged into
to release the closure. Pœcess itil
elongated across projection ii as shown, so that
and out of an interlocked relation in which they
form a sealed cooking chamber, two handles
pin 56 can engage therein in diilerent interk
having shafts journaled in and extending down
locked 'relations of-the closure and receptacle.
through said cover projections, a pendent wrist
When the pressure operated latch is in latching
pin eccentrically fixed to the lower end of each
position, it may be. released bythe user lifting
handle shaft, and an upwardly facing cam groove
arm 43 to permit steam in the cooker to lift
in each of said receptacle projections forv receiv
valve 4l and vent from the c-ooker.
ing a dirîerent one of said wrist pins, each of said
The modified cooker shown in Figures 10 and
cam grooves extending outwardly from the body
l1 diiîers from that shown in Figures 1 to 9
only in the respects shown and now to be de 50. of the receptacle toward the outer end of its pro
jection, whereby relative rotation of the cover
and receptacle is effected by rotation of said'
~ The disk 24, crank pin 25 and the handle re
handles while the cover and receptacle are en»
turn spring 33 associated with each handle 2i
are omitted inthe modified construction as are
also the recesses in the closure projections 29. 55
The modified closure projections 29m of this form
of cooker have flat horizontal bot‘torn faces.
Each handle shaft 22 journaled in each projec
tion 20m has ñxed on its lower end a pinion 69
which is coaxial with the shaft and the upper 60
face of which pinion abuts the horizontal nat
bottom face of the projection 29m.
In themodiñed cooker, the cam slot or groove
30 yin each receptacle projection ii is omitted.
The modiñed receptacle projections Hm of the
modiñed form of cooker have each formed there
on a short arcuate rack lil which is concentric
with the vertical axis of the cooker receptacle
and has teeth projecting from its outer edge
radially of the receptacle for meshing of each 70
rack 'I9 with a diilerent one of the pinions 69
when the closure is applied as described in con
nection with the cooker shown in Figures 1 to 9.
References Cited in the ñle of this patent
Whitaker ________ __ Dec. 14, 1920
Deniuth __________ __ May 4, 1926
Auchincloss ______ __ Mar. 19, 1929
LeRoy __________ __ Oct. 10, 1933
Ludington ______ __ Dec. 21, 1937
Rocio ____________ __ July 23, 1940 .
Wittenberg ______ __ Oct. 15, 1940
Sheridan ________ __ Nov. 16, 1943
The two racks l0 are located in diametrically
oppositeposìtions. ,
Great Britain .... .__ Aug. 19, 1940