U.S. patent number 3,632,014 [Application Number 04/849,690] was granted by the patent office on 1972-01-04 for pressure pans.
This patent grant is currently assigned to Lares Produtos Domesticos S.A.. Invention is credited to Salvador Peluso Basile.
United States Patent |
3,632,014 |
Basile |
January 4, 1972 |
PRESSURE PANS
Abstract
A pressure-cooker having a cover provided with an outer
diametrical arm which centrally forms a cylindrical projection
having a threaded axial hole centered with respect to a lower neck
engageable around a central upper projection of the cover. A pin
threadedly engages the axial hole, the upper end of the pin holding
a knob and the lower end terminating in a ball point laterally
received in a slot of the cover projection. A pair of plates,
having an inverted L-shaped hook upper section and a V-shaped
projecting tooth followed by a round outer corner, are affixed to
the outer surface of the cooker body diametrically opposed and
partially projecting beyond the upper edge of the cooker body. Each
end of the diametrical arm having its upper surface provided with a
longitudinally recessed V-shaped central portion for engaging an
associated projecting tooth.
Inventors: |
Basile; Salvador Peluso (Sao
Paulo-SP, BR) |
Assignee: |
Lares Produtos Domesticos S.A.
(Sao Paulo, BR)
|
Family
ID: |
25590900 |
Appl.
No.: |
04/849,690 |
Filed: |
August 13, 1969 |
Foreign Application Priority Data
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Jan 1, 1969 [BR] |
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205,430 |
May 12, 1969 [AR] |
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221,437 |
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Current U.S.
Class: |
220/203.29;
D7/358; 220/325; 220/752 |
Current CPC
Class: |
A47J
27/0808 (20130101) |
Current International
Class: |
A47J
27/08 (20060101); B65d 007/00 (); B65d 007/22 ();
B65d 053/00 () |
Field of
Search: |
;220/55P,55PC,44R,94,57,44B |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
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1,030,792 |
|
Mar 1953 |
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FR |
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649,141 |
|
Aug 1928 |
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FR |
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254,624 |
|
Aug 1927 |
|
IT |
|
Primary Examiner: Schwartz; Raphael H.
Claims
What I claim is:
1. An improved pressure-cooker comprising, in combination:
a cooker body;
a cover which is provided with an exhaust valve and at least one
small orifice disposed along the periphery of said cover;
said cover also being provided with a central upper projection
which is cylindrical in shape and of reduced height and which has a
slotted orifice formed by a transverse bore opening into an upper
diametrical slot;
said cover being provided with an outer diametrical arm which
centrally forms a cylindrical projection having a threaded axial
hole centered with respect to a lower neck engageable around said
central upper projection of said cover;
a threaded pin being adapted for being threadedly engaged in said
axial hole and the upper extremity of said threaded pin holding a
knob and the lower extremity of which terminates in a ball point
laterally received into said slotted orifice of said cover
projection;
a pair of plates affixed to the outer surface of said cooker body
and being diametrically opposed and partially projecting beyond the
upper edge of said cooker body;
each of said plates having an inverted L-shaped hook upper section
and having a V-shaped projecting tooth followed by a round outer
corner; and
each end of said outer diametrical arm being provided in its upper
surface with a longitudinally recessed V-shaped central portion
adapted to engage an associated one of said projecting teeth.
Description
This invention relates to a pressure-cooker of improved design.
Among the various kitchen utensils the pressure-cookers are widely
known as dependable ones for preparing many different alimentary
means, several food substances in a manner which is both more
economic and with more quickness.
The pressure-cookers of conventional design currently in use
nowadays embody undoubtedly many advantageous characteristics due
to their own particular method of construction. However, without
trying to diminish these advantageous features of the existing
pressure-cookers, it must be stressed that otherwise some other
disadvantageous details can be found which seriously and
unquestionably limit their use in a more ample way.
As may be appreciated, among said limiting details there are quite
a few which are inherent to the very own manufacturing process of
said pressure-cookers as is the case, e.g., of the conventional
locking arm attaching means which owing to their particular format
must be casting shaped thus increasing the product cost besides the
fact that if one contemplate their industrial scale production, it
will be apparent that they cannot follow in identical conditions
the pattern set for the manufacture of the remaining components
wherewith the mass production of said pressure-cooker is
prejudicially restrained.
Another disadvantage of the conventional-type pressure-cookers
which does not necessarily originate from its method of
construction and which may accidentally occur relates to the
opening of said utensils when the user inadvertently fails to
follow the strict instructions set by the manufacturer that the
knob or round handle must be slowly rotated so that the steam held
within the pressure-cooker is allowed to escape through the
junction represented by both cover and body of said utensil and the
user therefore proceeds to the opening with a brusque turn of the
handle and almost instantaneously releases the arm ends in relation
to the side locks, this leading to a violent stream burst resulting
in the well-known ruinous consequence or it is the arm itself which
turns loose and escapes its mount in the central hub diametrical
outer slot, also with disastrous results.
In view of the aforementioned circumstances, and in order to
overcome them, improvements are hereby provided (to be described in
detail later on), comprising simple means both ingenious and
practical with which said problems are conveniently solved, this
regarding not only the decreasing of the costs involved or a
quicker assembly line production but also the elimination of any
possibility of disastrous results originated from any oversight or
lack of attention on the part of the user or housewife when using
the pressure-cooker of this invention.
As it will be appreciated and clearly understood through
thefollowing description, other well-known inconveniences of the
conventional pressure-cookers are equally outdone by this
invention.
In fact, one of the most important features of the pressure-cooker
of this invention is essentially based upon the addition, besides
the usual exhaust valve, of four or any other number of
supplementary valves formed by small orifices disposed along the
cover periphery, said valves being adapted to allow the escaping of
a smooth vapor in the event of any built-up pressure inside the
pressure-cooker.
Another feature of the pressure-cooker of this invention pertains
to its novel and improved locking mechanism comprising a locking
arm positioned diametrically and externally with respect to said
cover and rotatively free around a central projection thereto and
being firmly attached to said cover by means of a knob or round
handle journaled on a threaded pin upper and transversally
positioned on said locking arm and attaching thereto through its
lower round end into a diametrical slot with enlarged lower
portion, said arm having its free ends adapted to be applied to and
confined by a pair of locking means with side entrances and fitted
to the pressure-cooker free upper edge.
The invention will be more clearly understood from the following
description of a preferred embodiment, given by way of example and
which does not mean any limiting to the invention, with reference
to the accompanying drawings in which:
FIG. 1 is a perspective view of an improved pressure-cooker
constructed in accordance with the present invention showing its
parts in exploded line taken along lines X--X and Y--Y;
FIG. 2 is also a perspective view of the same assembly, but showing
the cover out of its normal position on the pressure-cooker;
FIG. 3 is similar to FIG. 2, but shows the cover fitted to the
pressure-cooker body; and
FIG. 4 is a cross-sectional view taken along line 4--4 of FIG.
3.
Referring now the the above figures, it may be seen that the
pressure-cooker for which said improvements were specially designed
is of the type which comprises a body 1 of cylindrical, round or
any other format having a cover 2 comprising besides the customary
exhaust valve 3 four or any other number of additional valves
formed by small orifices 4 disposed along the cover periphery, said
cover being also provided with an upper central projection 5 of
cylindrical format and reduced height which has a transversally
bore 6 open into an upper diametrical slot 7.
In addition and as a complement, said cover is provided with an
outer diametrical arm 7' which forms a centrally cylindrical
projection 8 having a threaded axial opening 9 centrally adjusted
in respect to a lower cylindrical neck 10, and secured around the
outer projection 5 of the cover, said axial opening 9 being
trespassed by a threaded pin 11 the end of which houses the driving
knob or handle 12, and having its lower extremity terminated in a
ball point 13 laterally engageable into the slotted orifices 6-7 of
said cover projection 5.
The aforementioned improvements also include for engagement and
fixing purposes of the free arm extremities 7 of cover 2, a pair of
metal plates 14 which are applied and riveted on the outside
surface of the cooker body 1 (or thereto attached by means of pin
19 and the pressure-cooker's own handle 20), diametrically opposite
and partially projecting beyond its free upper edge, each of said
plates forming an inverted "L" 15, its axial portion having an
inner "V"-shaped projecting tooth 16 followed by a round outer
corner 17.
The arm 7', in turn, is formed with extremities each one provided
in its upper surface with a longitudinally recessed central portion
18 also "V" shaped and therefore adapted to substantially engage
under tooth 16 of fitting hook 15 on the corresponding side.
In the improved pressure-cooker of this invention when the arm 7'
and the cover 2 are joined together by means of the central pin 11
with ball end 13 attaching into the slotted orifice 6-7 of
projecting part 5, the closing operation results extremely simple
and practical, the user having only to rotate the arm 7' until its
extremities are engaged under hooks 15 of side plates 14, further
having to proceed to a simple clockwise turn of handle 12 with
which the arm 7' gradually ascends guided by a threaded orifice 9
around pin 11 until its longitudinally recessed extremities 18
tightly engage under the "V"-shaped teeth 16 of hooks 15 with which
a tight closing of the pressure-cooker is achieved.
It must be emphasized in addition that both the tooth 16 and the
recess 18 of the fitting apparatus provide guidance for an
appropriate closing of the pressure-cooker in case it eventually
occurs an oversight or any other negligence--the arm recessed
portions 18 do not fit exactly under the "V"-shaped teeth 16 of
fitting hooks 15-- the closing procedure evidently will cause the
gradual ascending of arm 7' until its extremities meet with the
round corners 17 of said hooks, but escapes laterally through
them.
The pressure-cooker opening operation is also accomplished by
turning handle 12 but in opposite direction, i.e., counterclockwise
with which the arm will gradually descend, this operation obviously
requiring a certain time to be performed until the recessed
extremities 18 of arm 7' are set completely free from the
"V"-shaped teeth 16 of hooks 15, this time being enough for the
gradual vapor escape through the connected pressure-cooker body and
cover portions, therefore making it impossible for the steam to
escape in a more brusque and violent way with its inevitable and
damaging consequences.
The slow opening of the pressure-cooker followed by a gradual
escape of vapor consequently enables to the utensil opening when
still directly over the fire for an eventual inspecting of its
contents or cooking progress and therefore dispenses with the usual
period required for the pressure-cooker to cool-off and also the
immersing under current water.
It is also convenient to point out that in the opening operation
the locking devices only allow for the turning and detaching of the
arm when the latter itself is well under level, i.e., when the
inner central neck 10 already covers a great portion of the
diametrical slot 7 of the cover central projection 5, thus
preventing the lateral disengaging of pin 11 and consequently of
the entire arm 7'.
Finally, the aforementioned improvements make it possible to use
locking plates 14 for the arm 7' made by a stamping process instead
of by casting, the same as with the original assembly engaging
means, with which apart from the resulting economy it becomes
possible to produce them in a quicker manner and in parallel line
with the production in series of the pressure cooker.
* * * * *