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Патент USA US3077727

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Feb. 19, 1963
Filed May 25. 1961
E. GRASWICH ET AL
ROTATABLE BAFFLE FOR KITCHEN
RANGE VENTILATORS
3,077,717
2 Sheets-Sheet 1
I8
40
23
INVENTORS
EDWARD GRASWICH
JACK I4.’ CEDA/PQU/ST
BY
7
A T TOl-PNE VS
Feb. 19, 1963
_ E. GRASWICH ETAL
3,077,717
ROTATABLE BAFFLE FOR KITCHEN
RANGE VENTILATORS
Filed May 25, 1961
2 Sheets-Sheet 2
[7b A
INVENTORS
EDWARD GRASW/CH
JACK w CEDAROU/JTJ
B
yaw!
v
ATTOR
VS
United States Patent Oiilice
3
2
3,677,717
RGTATABLE BAFFLE FUR KETCHEN RANGE
i
3,@7?,'il?
Patented Feb. 19, 15.963
VENTHLATQRS
Edward @raswich, Walnut Creek, and lack W. Cedarqnist,
San Francisco, Calif., assiguors5 by mesne assignments,
to Dohrmann Sales Qompany, San Francisco, Caliti, a
corporation of California
'
Filed May 25, 1961, Ser. No. 125,889
4 Claims. ({Zl. 55-4il4)
This invention relates to ventilator apparatus for ex~
hausting cooking gases from cooking surfaces in general.
More particularly this invention relates to ventilator ap~
paratus employing a rotatable baiiie.
con?guration as shown in FIG. 3 and it is provided with
a top wall 18 having a large opening 22 therein and a bot
tom wall 19 in which the opening 21 is provided. Both
the top wall to and the bottom wall ll‘ may be friction
ally held in this enclosure or suitable conventional fasten
ing means may be provided thereto so that either one or
both of these walls may be removed from the enclosure
and the rotatable battle may be removed through the
open top. The member 11% of the ventilator wall struc
10 ture may be made removable so as to provide access to
the rotatable battle enclosure for removal thereof for
cleaning and servicing if necessary.
The rotatable baffle is provided with a frame at} of
generally rectangular con?guration and this frame in
. An object of this invention is to provide an improved 15 cludes a top member dila, side members dill: and Allis,
ventilator structure for use with cooking ranges and the
and bottom member dilll. The side members ‘lilo and
like in which there is provided a rotatable battle adapted
dtlc may be integral with the bottom member 4% and
to rotate at speeds of the order of 500 r.p.m.
may be shaped simply by bending the end portions of the
Another object of this invention is to provide an im-.
bottom member 490.’ into vertical positions. Thereafter
proved ventilatorstructure for use with cooking ranges 20 the end portions of the top member ‘lilo are attached
with a rotatable ba?iestructure constructed so as to be
by welding or the like to the tops of the side members
able to withstand temperatures of the order of 450 de
40b and ‘tile respectively. The ends of the member 4%
grees F. under certain operating conditions.
extend beyond the tops of the side members to engage
v A further object of this invention is to provide an im
the in-turned edge portion of the enclosure 17 as shown
proved ventilator structure for use with cooking ranges 25 in FIG. 2 to support the baffle structure in the enclosure.
with a rotatable ba?'ie structure that isremovable so that
A round shaft 23 is provided to the rotatable bai‘?e and
it may be removed and cleaned in commercial dish
the ends of this shaft are attached to the top member éilla
washing equipment with steam and detergents.
and to the bottom member 46d by means of machine
Another object of this invention is to provide an im
screws 22:: and 21a, respectively, so that this shaft is ?xed
proved ventilator structurefor use with cooking ranges 30 ly held in the frame. The baiile structure is provided with
with a'rotatable baf?e structure which is provided with
a circular plate member 24 and a plurality of vanes 25,
a bearing structure that is adapted to Withstand rela
each of arcuate shape, are attached to the bottom surface
tively high temperatures under certain operating condi~
of this plate member by means of rivets 25:: as shown in
tions and which is adapted to rotate at relatively high
FIG. 3. This circular plate member 24 is provided with
speeds.
‘
35 a central hole for receiving a shoulder of the lower hub
Another object of this invention is to provide an im
27. The upper hub member 26 is positioned over this
hole and the two hub members are riveted against the
from cooking surfaces in which there is provided a rotat
plate member by means of the rivets 28 which hold the
able ba?ie structure that may be used in any desired
hub. members and plate 24 in assembled relation. Bearing
position including vertical, horizontal and other positions. iii) members 29 and 30 which are of carbon, graphite or simi
Other and further objects of this invention will be ap
lar material adapted to withstand relatively high tempera
tures are press-?tted into the central holes provided in hub
parent to those skilled in the art to which it relates from
proved ventilator structure for exhausting cooking gas
the following speci?cation, claims and drawing.
members 26 and 27 respectively. These bearing members
‘ in accordance with this invention, there is provided an
are provided with shoulders which abut the outer surfaces
improved ventilator structure with a rotatable baffle for
use with cooking ranges to exhaust the cooking gases
therefrom. This rotatable bafiie structure has several
advantages over similar structures in that it is constructed
to rotate at relatively high speeds and is adapted to with
of the respective hub members and extend outward be
yond these hub members as shown. Collars 31 and 32 are
?xed to the shaft 23 by means of set screws 33 and 34 re
spectively, and these collars are positioned above and
below the bearing members 29 and 30 respectively. The
stand relatively high temperatures under certain oper 50 faces of these collars facing the bearing members are pro
ating conditions.
Referring to the drawing brie?y:
FIG. '1 is a sectional view showing a ventilator struc
vided with polished surfaces so as to function as thrust
bearing surfaces for the end surfaces of the bearing mem
bers 2% and 3%) whereby this rotatable bai'lie structure may
ture provided with a rotatable baffle of this invention;
FIG. 2 is a detail View of the rotatable bar'lle; and
FIG. 3 is a sectional view taken along the line 3—3 of
be used in its horizontal, vertical or in different angular
positions, depending on the installation in which it is
FIG. 2.
The vanes 25 are of arcuate construction and they are
attached to the plate 2% so that adiacent ones of the vanes
.
'
Referring to the drawing in detail, there is illustrated
employed.
an embodiment of this invention employing a sheet metal
de?ne curved channels there'oetween which expand toward
structure iii‘ de?ning a passage for exhausting cooking 60 the circumference. The cooking gases passing through
gases from a cooking surface located below the structure.
This sheet metal structure is provided with a stack ll ex
tending upward, only a part of which is shown and inside
of which there may be provided a motor driven exhaust
these channels engage these blades or vanes and impart
rotation ‘to the plate member 24 to which they are at
tached. A sulhcient number of these vanes 25 is pro
vided to the plate member 24 to impart relatively high
fan (not shown). The sheet metal structure is also pro 65 speed rotation on the order of 50f) rpm. to the rotatable
vided with a back wall 12, a front wall 13 and an inn/e‘
battle structure, thereby providing a baffle structure having
inclined wall ‘Ir-i which is provided with a lip forming
improved e?iciency for removing grease from the grease
the bottom wall of an opening which is adapted to be
laden cooking gases being exhausted therethrouvh. Also
closed by the lire door 15 and through which opening the
by providing a plurality of these vanes spaced relatively
cooking gases pass toward the opening Ell of the rotatable
close, the resulting rotatable baille structure provides a
ba?ie enclosure l7. This enclosure is of generally square
relatively large surface of contact for the cooking gases
3,077,717
3
4
including a horizontal or vertical position, said support
on which the greases to be deposited and collected from
the cooking gases may be collected.
This rotatable batlle structure may be subject to clean
ing means comprises a frame, means for attaching said
shaft to said frame, said frme having members for slid_
ing in commercial dishwashing equipment which make use
of steam and detergents. The side members 49b and 4B0
of the rotatable bafile structure are slidably positioned in
the slides 17b and 17d, respectively, which are attached
ture is adapted to be removed from said enclosure for
cleaning, said battle structure having a plurality of blades
attached to one side of said substantially ?at member
ably engaging said enclosure whereby said ba?le struc
and extending substantially from the circumference
to the members 17a and 17c. These latter members are
thereof
inward, said blades extending partly over said
attached to the inner side walls of the enclosure 17. Thus
the rotatable baffle structure may be removed from the 10 inlet opening whereby the cooking gases are guided to
slides 17b and 17d by lifting it up out of these slides.
While we have shown a preferred embodiment of the
invention it will be understood that the invention is capa
ble of variation and modi?cation from the form shown so
that its scope should be limited only by the scope of the
claims appended hereto.
What we claim is:
1. In a ventilating structure for extracting grease from
said blades so to impart rotation to said ba?le structure.
3. In a ventilating structure for extracting grease from
the grease-laden gases of a cooking surface, said ventilat
ing structure being adapted for use at relatively high
temperatures, wall structure forming a passage for ex
hausting cooking gases extracted from above said cook
ing surface, rotatable grease collecting 'ba?le structure,
said wall structure having an enclosure for said rotatable
bai'lle structure, means for supporting said rotatable baf
the grease-laden gases of a cooking surface, said ventilat
?e structure in said enclosure, said rotatable baffle struc
ing structure being adapted for use at relatively high tem
ture comprising a substantially ?at circular member hav
peratures, the combination comprising wall structure form
ing a hole substantially in the center thereof, hub means
ing a passage for exhausting cooking gases extracted from
positioned in said hole, said hub means having opposing
above said cooking surface, rotatable grease collecting
members, means for ?xedly attaching said opposing mem
ba?le structure, means for supporting said rotatable baffle
structure in said passage, said rotatable bathe structure 25 bers of said hub means to opposite sides of said substan
tially ?at member so that said substantially ?at member is
comprising a substantially ?at circular member having a
clamped between said opposing members, opposing heat
hole substantially in the center thereof, hub means posi‘
resistant bearing means press-?tted into said opposing
tioned in said hole, said hub means having opposing mem~
members of said hub means, said bearing means extend
bers, means for ?xedly attaching said opposing members
of said hub means to opposite sides of said substantially 30 ing out of saidhub means to form thrust bearing surfaces‘
on the ends thereof, a shaft positioned in said bearing
flat member so that said substantially ?at member is
means for rotatably supporting said bearing means,
clamped between said opposing members, opposing heat
means ?xedly attached to said shaft on each side of said
resistant bearing means press-?tted into said opposing
bearing means having thrust bearing surfaces for co
members of said hub means, said bearing means extending
out of said hub means to form thrust bearing surfaces on 35 operating with the thrust bearing ends of said bearing
the ends thereof, a shaft positioned in said bearing means
for rotatably supporting said bearing means, means ?xedly
attached to said shaft on each side of said bearing means
having thrust bearing surfaces for cooperating with the
means so that said ba?le structure may be positioned for
use in any one of a plurality of positions including a hori
zontal or vertical position, said supporting means com~
prises a frame, means for attaching said shaft to said
thrust bearing ends of said bearing means so that said baf 40 frame, said frame having side members, slides for slid
ably receiving said side members, means for attaching
said slides to said enclosure whereby said baffle structure
is adapted to be removed from said enclosure for clean
ing, said bame structure having a plurality of blades at—
attached to one side of said substantially ?at member and
extending from the circumference thereof inward and 45 tached to one side of said substantially ?at member and
extending substantially from the circumference thereof
means for guiding flow of the cooking gases through said
inward, said wall structure having means for guiding
blades to impart rotation to said ba?le structure.
flow of the cooking gases through said blades to cause
2. In a ventilating structure for extracting grease from
the grease-laden gases of a cooking surface, said ventilat
rotation of said baffle structure.
4. In a ventilating structure for extracting grease from
ing structure being adapted for use at relatively high 50
the grease-laden gases of a cooking surface, said ventilat
temperatures, the combination comprising Wall structure
ing structure being adapted for use at relatively high
forming a passage for exhausting cooking gases extracted
temperatures, the combination comprising wall structure
from above said cooking surface, rotatable grease col
forming a passage for exhausting cooking gases extracted
lecting baf?e structure, said wall structure having an en
from above said cooking surface, rotatable grease col~
closure for said rotatable ba?ie structure, means for
lecting battle structure, means for supporting said rotata
supporting said rotatable ba?ie structure in said enclosure,
ble baffle structure in said passage, said rotatable ba?le
said enclosure having inlet and outlet openings therein on
structure comprising a substantially ?at circular member
opposite sides of said baf?e structure, said rotatable ba?le
having a hole substantially in the center thereof, hub
structure comprising a substantially ?at circular mem
ber having a hole substantially in the center thereof, 60 means positioned in said hole, said hub means having
opposing members, means for ?xedly attaching said op
hub means positioned in said hole, said hub means hav
posing members of said "hub means to opposite sides of
ing opposing members, means for ?xedly attaching said
said substantially ?at member so that said substantially
opposing members of said hub means to opposite sides
flat member is clamped between said opposing members,
of said substantially ?at member so that said substan
opposing heat resistant bearing means press-?tted into
tially flat member is clamped between said opposing mem
said opposing members of said hub means, said bearing
bers, opposing heat resistant bearing means press-?tted
means extending out of said hub means to form thrust
into said opposing members of said hub means, said
bearing surfaces on the ends thereof, a shaft positioned
bearing means extending out of said hub means to form
in said bearing means for rotatably supporting said hear
thrust ‘bearing surfaces on the ends thereof, a shaft posi'
ing means, means ?xedly attached to said shaft on each
tioned in said bearing means for rotatably supporting
side of said bearing means having thrust bearing surfaces
said bearing means, means ?xedly attached to said shaft on
for cooperating with the thrust bearing ends of said
each side of said bearing means having thrust bearing
bearing means so that said ba?le structure may be posi
surfaces for cooperating with the thrust bearing ends of
tioned for use in any one of a plurality of positions in
said bearing means so that said baffle structure may be
positioned for use in any one of a plurality of positions 75 cluding a horizontal or vertical position, said supporting
?e structure may be positioned for use in any one of a
plurality of positions including a horizontal or vertical
position, said battle structure having a plurality of blades
3,077,717
5
means comprises a frame, means ‘for attaching said shaft
ing means for guiding the cooking gases to said channels
to said frame, said frame having members for slidably
engaging said Wall structure whereby vsaid baf?e struc
‘between said Iblades so that rotation is imparted to said
baffle structure.
ture is adapted to be removed from said wall structure
for cleaning, said ba?le structure having a plurality of 5
blades attached to one side of said substantially ?at mem
ber and extending substantially from the circumference
thereof inward, adjacent ones of said blades de?ning
curved and expanding channels therebetween extending
from said hub means substantially to the circumference 10
of ‘said substantially ?at member, said well structure hav
References Cited in the ?le of this patent
UNITED STATES PATENTS
2,008,965
2,781,963
Miller _____________ .._ July 23, 1935
Faber ______________ __ Feb. 19, '1957
2,793,712
2,889,007
Graswieh et a1. ______ __ May 12, 1957
Lande _______________ _- June 2, 1959
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