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Патент USA US2138198

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‘Nov. 29, 1938.
Filed Aug. 17, 1956
Marne. C. Mara
BY mm'ipm/mv A! l/llLlE‘CM
Patented Nov.‘29, 1938
and Edmund H.
Walter G. Weber, Painted Post,
Wellech, Corning, N. ‘1., assignors to Corning
Glass Works, CorninnN. Y., a corporation of
New York '
Application August 17, 1936, Serial No. 96.530
This invention relates to coffee makers and
particularly to the type of coifee makers wherein
water, which has been heated nearly to the boil
ing point, is passed through a con?ned'mass of
5. ?nely ground coffee and a suitable ?lter.
In all past‘cofiee makers of this type with
which we~are familiar, the brewing and} ?ltering
action occurs concurrently, the ?ltering action a
starting substantially immediately after the water
10 has been poured over the ground coffee. The
?ltering action'is, accordingly, made slow so as
to allow the water time to extract as much of
the essence from the co?ee as is practicable.
In order to obtain a brew of superior quality,
15 free from the harmful effects of most coffee, the
coffee should be permitted to brew from'two to
four minutes as desired in accordance with the
taste of the user, after which the brew should
be ?ltered as completely and as quickly as pos
20 sible. So far as we are aware, however, no co?ee
Fig. 3 ‘showing the parts in ?ltering po
Fig. 6 is a perspective view of the combined
valve and ?lter plate,
Referring to the drawing, it will be seen that , 5
our coffee maker comprises a suitable vessel such
as In for receivingv the brew, a combined valve
and ?lter plate supported by the vessel It and
havinga seat II on which a brewing chamberai 2'
13 of its bottom raised so as‘to direct the flow
of ?uid through a series of surrounding holes l4
therein, which are adapted-to at times register
with indentations iii in the combined valve and 15
?lter plate seat II as illustrated in Figs. 1, 3
and 5. Each of the indentations l5 has connected
with it a shallow channel It directed into a largev
annular sediment trough? I‘! the inner wall of
~which serves as a dam l8 over which accumulated 20
?uid ?ows into the vessel It through a funnel-.
the user to exercise his own discretion as to the
like opening l9.
?ltering action.
An object of this invention is the brewing of
The brewing chamber l2 has the central portion
brewing apparatus heretofore devised has allowed
brewing time prior to the commencement of the
sition; and
The brew chamber 12 is aligned concentrically
with seat I l by an upstanding'?ange 20 extending
from the outer periphery of the ?lte plate seat- 25
II; and that bottom surface of bre chamber l2
which rests on seat It is ground against the seat
Another object is a coffee maker which permits to produce a fluid tight ?t between it and the sur
the user to exercise his own discretion as'to the faces surrounding holes Hi to prevent the passage
of ?uid from the brew chamber l2 when the 30
30 brewing time.
Among its features this invention embodies a‘ chamber is so positioned that the holes therein
coffee maker in which the brewing and ?ltering are out of register with indentations vl5, as illus
trated in Figs. 2 and 4. -Such'a condition pre
action can be made to occur consecutively.
Another feature is a coffee maker of simple vails when an arrow 24 (Fig. 1) on the ‘side of
construction, and ‘in which all of the parts which chamber I2 is immediately above an arrow desig-- 35‘
contact with-the ground coffee .and the brew are nated “B” on the outer vertical surface of ?ange
formed of glass so as to avoid contamination of 20 and is termed the brewing position.
a beverage in a manner to obtain a brew. of
superior quality and ?avor.
the brew and to preserve its quality and ?avor. A further feature is a coffee maker composed‘
40 of an upper or brewing chamber, a combined
valve and ?lter plate supporting the upper cham
ber, and a brew receiving vessel on which the
By rotating the chamber l2 slightly clockwise
until the arrow 24 is immediately above an arrow
designated “F” on the ?ange 20, the holes I4 are 40
brought into register with the indentations I5 and
this is termed the ?ltering position.
A nib 2| (Fig. 1), protruding from the inner
wall of vessel i0,- registers with a suitable notch
Fig. 1 is a side elevation, partly in section, of a ~22 (Fig. 6) in the lower edge'of the combined 45
combined valve and ?lter plate rests.
In the drawing:
coifee maker embodying my invent
Y ; g
Fig. 2 is a plan view of Fig. 1 W1 ‘ the brewing
chamber arranged in the brewing?~ osition and
paittly broken away to better show tie respective
50 Pa 5;
Fig. 3 is a view similar to Fig. 2, but with'the
parts in the ?ltering position; _
- >
Fig. 4 is an‘ enlarged vfragmentary view taken on
the lines 4-4 of Fig. 22"
Fig. 5 isa view similar toFig. 4, taken on line
valve and ?lter plate and so prevents rotation of '
the plate .when the brewing chamber is being ro
tated from its brewing to its ?ltering position.
The vessel; It has been illustrated as being of the
‘ same type as that shown in the co-pending ‘said 5-0
application'Ser.» No. 89,183, ?led 'July 6, 1936,; but
it should be understood that any vessel of proper
'sizema'y be. used if desired and the ?lter plate,
manually held while the brew chamber is being
rotated from the brewing to the ?ltering position. 55
In the operation of. the coffee maker, the brew
3. In a coffee brewing apparatus, a combined
valve and ?lter .plate'consisting of a glass ele
described, a suitable. quantity of ground coffee ment having indentations and a sediment trough
placed therein, and water heated to a tempera— '. - therein and also having channels connectingsuch
ture near its boiling point poured thereov'er. The indentations with the sediment trough one wall
water is'allowed to stand in the upper container of which is also the wall of an outlet for accumu
in contact with the ground coffee and brew for lations of ?uid in the trough and a brewing
the desired period of time after which the brew chamber-supported by said plate having holes
chamber is rotated to the second described or passing thru the bottom thereof arranged for
10 ?ltering position. It is to- be understood that
placement in and out of register with such in 10'
chamber is placed‘in the brewing position as ?rst '
during the brewing period the water and ground
coffee may be stirred as frequently as desired at
the discretion of the user, and further, that the
?ltering period maybe lengthened if desired by
15 rotating the brew chamber to an intermediate
point between the brewing and ?ltering positions.
At the ?rst passage of ?uid through the holes
ll, grounds 25 (Fig. 5) which have rested in the
holes will pass to the bottom of the indentations
l5 now‘ below them. However, the grounds di
rectly above the holes form' arches or domes, as
indicated in Fig. 5, which prevent further pas
sage ,of coffee grounds through holes l4, and the.
layer of grounds above such domes acts as a
4. In a coffee maker, a glass brewing cha'mber
having an annular series of holes passing thru~
the bottom thereof, a glass support for said‘
chamber adapted for placement on a-vessel for 15
receiving a brew released from con?nement in
said brewing chamber, said support having its
chamber supporting surfaces ground against
thosepbottom surfaces of said brewing chamber
surrounding said holes and sealing them against 20'
the passage of ?uid and having a series of hori
'zontally disposed channels with which the holes
may be aligned by a slight rotary movement of
the brewing chamber with respect to said sup
?lter for the liquid. ;To eliminate the small par; port.
ticles of grounds 26 that have left the holes l4‘
5. A coffee brewer which consists of a brewing
and passed through the shallow channels l6 at chamber having a perforated bottom, a support
the beginning of the ?ow, the liquid is allowed to for said chamber adapted for placement over a
?rst accumulate in the annular sediment trough vessel for receiving the brew, said support hav
30 I 'l and settle, after which it flows over the wall
ing horizontally disposed channels for directing 30
or dam l8 and through hole l9 into the vessel Hi. ?uid released from said chamber into such ves
When ?ltering action has been completed, the sel, said brewing chamber and support having
combined valve and ?lter plate and the brew cooperating surfaces which when arranged in one
chamber are removed from the vessel.
manner with respect to each other seal the per--_
It will be seen that a co?‘ee maker such as we 'forations against the passage of ?uid into such 35
have described is ideally suited to the brewing channels and when shifted to an alternative
of coffee in what is believed to be the preferred position with respect to one another bring the
manner, and is of simple construction requiring perforations into register with such channels.
few steps in its manufactin'e.
6. In a coffee making apparatus, a brewing
Although we have shown and described but one I chamber for receiving a brewing mixture having
embodiment of our invention, it is to be under—
stood that we do not wish to be restricted
tom thereof, a chamber supporting plate having
‘thereto except‘as de?ned by the appended claims.
’ a central aperture, an annular series of inden- ~
What we claim is:
1. In a coffee making apparatus, a brewing
chamber for receiving a quantity of ground coifee
and hot water, a receiving vessel for the brew,
a combined valve and ?lter plate intermediate to
said chamber and vessel initially preventing the
50 passage of ?uid through holes in the bottom of
said chamber into said receiving vessel, said
plate having a. plurality of- restricted ?uid pas
sageways therein brought into alignment with
such holes‘ by slight movement of said brewing
55 chamber with respect to said plate, and a trough
- into which the ?ow of ?uidentering said pas
sageways is directed and one wall of which forms
an over?ow outlet into said receiving vessel.
2. In an apparatus for making drip coffee, a
60 brewing chamber, said element having holes
thru the bottom thereof of a greater diameter
than the cross-section of individual granules of
_ ground co?ee used; and‘ a cooperating element,
on which said: brew chamber rests, having sur
65 faces cooperating with bottom surfaces of said
an annular series of perforations thru the bot
tations and channels establishing communication
between the indentations and the aperture, the 45
supporting surface of the plate cooperating with
the bottom surface of said brewing chamber to
close the opéh sides of the channels and pro
duce restricted passageways, and the walls of
the indentations cooperating with the walls of 50
the apertures to control the ?ow of ?uid thru
the channels.
7. An apparatus employed in brewing "a bev
erage by allowing a mixture of ?uid and dry in
gredients to brew for a selectel period of time 55
and then ?ltering the brew from the dregs, con-_ .
sisting of a brewing chamber for receiving the
mixture having an annularly arranged series of
‘perforations thru the-bottom thereof; in com
bination with a supporting plate having an an 60
nular row of indentations adapted to register
with the perforations in the chamber, the sur
faces of the plate-surrounding the indentations
cooperating with the bottom surfaces of said
brewing chamber to prevent the passage of ?uid
.from said chamber, said plate having‘ an aper-‘
brewing chamber for preventing the passage of
?uid or ground coffee thru said holes, said ele ' ture therethru. and having indentations and
ment also having indentations therein each for channels in its supporting surface in communi
receiving such co?ee grounds as may pass thru cation with each other, said indentations being
70 one of such holes with which it may be brought - so spaced that the perforations may be brought 70
into register and each‘indentation having a com
paratively shallow channel connecting it with
a trough in constant communication. with a‘bot
tom outlet in said element arranged over a vessel
75 for receiving the brew.
into register therewl -h'to provide a path for the
?ow of ?uid through the channels.
»8'.-In an apparatus for making drip coffee, a
brewing chamber having-a perforated bottom,’ a
plate upon which said chamber rests in rotatable 75
relation [with respect to said plate, said plate
having surfaces. which are cooperative with the
adjacent bottom surfaces of the brewing. cham
ber surrounding the perforations to seal them
' against the ?ow of ?uid therefrom, said plate
also having channels cooperative with bottom
surfaces of said brewing chamber and terminat
ing in indentations alternately disposed with re
spect to its sealing surfaces to 'a?ord restricted
outlet passages for ?uid by rotation of said brew
ing chamber until such vperforations and in
dentations are brought in register with each
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