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Патент USA US2406177

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Aug. v20, 1946.‘
2,406,177 -
‘ Filed Dec. 21, 1.943"
' 63%
I Altomq :
Patented Aug. 20, 1946
Cecil Gordon Vokes and Edward Arthur Stokes,
London, England; said Stokes assignor to Vokes
Limited, London, England
Application December 21, 194$,‘Serial No. 515,172
In Great Britain December 14, 1942
3 Claims.
(Cl. 183-—-79)
There are numerous types of apparatus some
times employed in conjunction with ?lters, in
which dust particles are removed from air (or
other gas as will be hereinafter understood when
air is mentioned) by centrifugal action. _In many
cases there is a whirling action about the axis of
a circular chamber, by which the dust is thrown
towards the outer wall and a layer of air heavily
charged with dust can be removed; in other cases
a passage of (say) rectangular cross-section is
carried round through perhaps 180° before re
moval of the dust. The present invention pro
vides arrangements in which (from one aspect)
the air ?ows along a passage of annular (includ
ing part of an annulus) cross-section which is
curved round radially and axially to give the cen
, 2
cleaned air will pass up the outlet tube. The
dust de?ected by the lip or trap 5 can be col
lected in a dust box 6 ?tted below the outer bowl.
If the device is to be used inverted, the assem
bly rod can be replaced by a tube to carry thev
dust to a box beneath the cleaner, as will be ap
parent without illustration.
In some cases the ?ow can be reversed and
the lip or trap located at the rim, as will also
be apparent.
It will be noted that the suggested manner
of assembly from two bowls and a. central rod or
tube makes it very simple to arrange for dis
mantling and cleaning.
V‘fe claim:
if the curvature is about 180° the whole will re
1, In an air cleaner of the centrifugal type, a
tube through which air is exhausted upwardly,
the lower end of said tube being ?ared back sub
stantially 189 degrees, said ?ared portion begin
ning and terminating in a common plane normal
to the axis 01” said tube, means forming a wall
spaced along said axis from the ?ared end of
said tube, said wall and ?ared end having their
semble a hollow stalk with a dished and hol- .
outer edges spaced and substantially concentric ’
trifugal action and the walls of which are spaced ,
further apart as it gets nearer to the axis of the
annulus so as to preserve a substantially equal '
cross-sectional area perpendicular to the gas ?ow.
Preferably the inner end of the passage becomes
a circle or nearly so and the ?ow axial, so that '
low circular head terminating in an annular 25 of said axis, said spacing gradually increasing to- .
opening, surrounding the stalk and of the same
ward said axis, said wall terminating inwardly in
cross-sectional area as that of the stalk. The
an aperture within said tube below said plane, a
form of the air passage thus provided is substan
‘de?ector cap positioned above said aperture and
tially that of a vortex caused by a ?uid enter
overlapping the periphery thereof, and a dust
ing a pipe.
receptacle ?tted to said wall and extending be
Other parts of the invention are embodied in
low said aperture.
a typical form shown upon the accompanying
2. A gas cleaner including a support, two an
drawing, the parts of the invention for which a
nularly dished members carried by the support
monopoly is desired being those delimited by the
one within the other, the dished areas of the
members being spaced apart to de?ne a curved
The drawing is a perspective view, partly bro
gas ?ow passage of equal area perpendicular to
ken away and shows a typical form in which
the ?ow throughout, the outer margins of the
the ?ow is (as generally preferred) inward to
members being spaced apart to de?ne an annu
wards the centre. The inner and outer walls I,
lar inlet to such passage, the inner member be
2 of the air passage are formed of annularly 40 ing axially formed to provide an outlet passage
dished bowls of which the outer or larger 2 ter
for the gas flow, and a gas trap in line with such
minates at the centre in a point or a small cir
outlet passage and immediately adjacent the
cle at 2a attached to a central assembly rod 3
dished surface area of outer member, to thereby
and the inner or smaller I merges into a cen
interrupt the gas ?ow in said passage on the
tral cylindrical outlet tube 4. At a suitable dis
‘ outer margin of the curved passage to collect the
tance from the centre of the outer bowl is a
dust directed into such margin.
circular lip or dust trap 5 and the two bowls are
3. A construction as defined in claim 2, where
so shaped and assembled that the cross-sectional
in the member with which the trap co-operates is
area of the annulus perpendicular to the ?ow is
formed with an axial opening to permit discharge
the same as that of the outlet tube. The air 50 beyond the curved ‘gas-?ow passage of the matter
will then enter the passage as indicated by ar
collected by the trap.
rows between the rims of the two bowls and. after
being carried round preferably at least 180°, the
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