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Патент USA US2408131

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.Sept. 24, 194.6.- Y
a c. G. vOKEs ET AL
1 2,408,130
Filed Sept‘. 1, 1943
2 Sheets-Sheet 1
¢._G.'vo-KEs Em
Filéd Sept, 1, 1945
2 Sheets-Sheet 2
‘ FI/G. 2. .
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Cecil Gordon Vokes and Edward Arthur Stokes,
' ‘ London, England; said Stokes assignor to Vokes
" Limited, London, England
Application September 1,1943, Serial No. 500,872 ,
' j
. ,In Great Britain September 17, 1942
6 Claims. (01. 210-116)‘
The above and ‘other parts of the invention
are embodied in atypical example which will
now' be described with reference to the accom
Filters in which a considerable surface area of
a filtering material is ico‘ntainediin a relatively
small volume are commonly employed.‘ There
are, for example, well known forms of ?lter with
panying drawings as applied to an oil ?lter of
deeply'corrugated orrgr'ooved‘ or pleated screens;
oftenv of p‘orous'textile materials suitably mount
porous ceramic material. The parts of ‘them
vention for which a monopoly is desired are those
set out in the claims.
ed and vpos‘siblyfof ‘star-shaped "cross section or
of 'concertin'a form." ‘
In the drawings:
H The ipresentYinventionprovides a construction
in which discs of rigid (as opposed to de?nitely
?exible)» porousmaterials'are assembled to pro-.
duce "a'?l'ter'unit'having hollow ?ns with deep
material, showing also how the cleaning’ knife
Fig. 3 is a sectional, elevation of the disc in
slightly modi?ed form,
of surface scraping when the pores become
clogged. Moreover any ‘suitable number' of discs
can be assembled together to give ?lter packs of
Fig. 2 is aplan view of a disc of porous ceramic
is arranged,
spacesbetween them. ‘Such a'construction can
utilize effectively porous‘ ceramic or like mate
rials, giving "easy replacement and the possibility
Fig. 1 is a sectional elevation,
Fig.4 is a perspective View of one of the clean
Fig, v5 is a broken perspective view partly in_
section showing two discs of't'he preferred form I
in superimposed ?lter forming relation.
‘ It is preferred to‘ use annular unglazed ceramic
discs with a central 'openingto be superimposed '
in alignment; Each disc; which is‘ of. appreciable
thickness, is formed to provide an outer periph
eral .edge' or' surface and. anfinner peripheral
Q Theimproved ?lter is made up of a plurality
of annular discs 25 of unglazed porous ceramic
material ‘arranged in superimposed contact in
axial alignment;
Each disc is formed on its
opposing upper and lower faces 26 and 21 with‘
edge. or surface. The‘ outer and inner surfaces 25
of the disc as saidv disc ‘ispositioned in ?lter as
senibly, are each formedyinline with the outer
and inner peripheraledges; with ribs extending
from such upper andlower surfaces, and for a,
short distance fromthe inner and outer:periph-‘ 30
eral edges.‘ The ribs at the outer peripheral sur
face are ‘of slightly greater thickness beyond the '
upper and‘lowe'r surfaces of the disc than the
ribs at the inner peripheral surface. _The outer
annular abutment ribs I at the outer margin of
such faces and annular abutment ribs 2 at the
inner margin. Each disc in the form shown in
Figs. :1 and 2 is formed with an annular channel
3 opening‘ through the outerperipheral surface 28
of the disc and terminating short of the inner
peripheral surface "29. The discs‘are each formed
with a central axial opening which when the
discs are assembled, provides a central bore 3a
extending vertically of the superimposed discs
peripheral surface 'of each disc is formed be 35 and de?ned by the inner peripheral surfaces 29.
Thediscs are held in assembled relation between
tween the upper and lower surfaces of that disc
upper and lower plates 4 and 5 and the discs
with a groove or'channel extending completely
are held'by the plates to receive in the central
around the disc, opening at its one end through
bore a tubular element 6 having an exterior
the outer peripheral surface but not extending
to the inner peripheral surface. . The ribs on the 40
diameter less than that of the bore. The upper
upper and lower surfaces at the outer peripheral
edgeof the discs contact with each other when
théidiscs are in filter servicepositions, and thus
separate the upper and lower surfaces of each
disk from that of'the ‘adjacent discs to thus de?ne.
what may be termed as inner channels between
the discs- .Each of such innerchannels are thus
end ‘of the tube 6 is provided with an enlarge
ment 6a having a bore in alignment withthe
bore of the tube and exteriorly threaded to en
gage an annular'wall 60 which communicates
with the outlet l3 of the ?lter. The enlargement
6a and tube S‘may be made as a single element
closed adjacent. the outer peripheral surfaces of
the disc‘ by the contacting outer ribs“ The inner
ribs, either by reason of their adjacent edges
being spacedby forming such inner ribs of less
height than the outer ribs, or by channelling or
buttressing such inner ribs, afford an opening
leading from an inner channel through the inner
and to the upper plate, 4. The lower end of the
tube 6 rests ‘squarely on the lower plate 5 and
is provided with a threaded pin 6b, preferably
peripheral edges of the disc.
or‘ asindicated in Fig. 1, welded to each other
welded or otherwise secured in the tube and pass
ingthrough the plate 5 and secured by a nut ID
to provide a rigid ?ltering assembly which, how
ever, may be easily disconnected for change of
55 discs at will.
The annular channel 3 in each disc provides
at the inner peripheries of the discs being formed
a large material entrance area for ?ltration pur
poses while the annular ribs l and 2 provide
between the discs, an elongated relatively nar
rower channel or hollow 20 by which the mate
to provide free communication between the cen
tral opening formed by the assembled discs and
spaces between the discs de?ned by contacting
abutments at the outer peripheries of the discs,
rial ?ltered through the discs is delivered through
openings 2a, Fig. 5, to the bore 3a of the as
sembled discs and from the bore through open
ings 2b in the wall of the tube 6 and upwardly
through the bore of the tube to the outlet 39.
The inlet Id of the conventional header .de
livers the oil to a space i5 surrounding the wall
providing a channel opening through‘the outer
side wall of the disc to provide entrance areas for
the fluid to be ?ltered, and means arranged in
the central opening'of the assembled discs for
connecting .said discs in assembled stacked rela
tion and for‘ receiving ?uid delivered to that
60 and from the space 15 to an annular space Hid
opening'for discharge,
between the periphery of the disc assembly and a
casing II, or as clearly shown in Fig. 1. A
cranked member i6 passing through a suitable
gland or packing'l‘l at the end of the casing
carries cleaning or scraping blades l8 (prefer
ably of springy metal) extending into the spaces
each disc being formed with an annular recess
.3. A ?lter unit made up of a series of independ
ent discs, supported in relatively superimposed
relation, each disc having an inner peripheral
surface de?ning a central opening, each disc hav
ing an outer peripheral surface de?ning an an
nular outer margin with the said outer margin
3 between the hollow ?ns. The cleaning blades 20 formed with an annular channel de?ning a ?lter
18 .may be welded or otherwise conventionally
entrance channel with the said channel extend
secured to the member 16, or, if preferred and ' ing through the outer peripheral surface of the
as shown in Fig. 4, the membermay be provided
with lateral rods [8’ with which the cleaning
disc, toward, but not through, the outer periph
eral surface of the disc, each disc being formed
blades are connected. By rotating an external 25 in its upper and lower surfaces with elements
handle or knob Hi the blades can thus be caused
providing axially extending ribs adjacent the
to throw out the sludge from between the layers
outer periphery of each disc and further formed
of ?ltering medium and also to‘scrape the outer
with additional axially extending ribs on said
surface of the ?ltering material and preferably
upper and lower surfaces adjacent the inner pe
remove a small clogged layer and expose a new 30 riphery of each disc, with‘suchadditional ribs
having radially extending channels therethrough
Obviously as clearly shown in Fig. 3, the discs
to a?ord communication with said central open
need "not necessarily be made in one integral
ing and the annular space between said ribs, the
piece; other assemblies of discs or various forms
ribs at the outer margins of the superimposed
to give the hollow ?nned construction with the 35 discs abutting when the discs are assembled, to
?ns extending either outwardly or inwardly can
provide a seal at one end of an inner channel
be devised without difficulty within the under
formed between approximate faces of adjacent
lying ideas of the invention, and the ?lter can be
superimposed discs when discs are assembled,
used for various fluids.
means to direct a ?uid to be ?ltered, to the en
Where the discs are made in two parts the 40 trance channels whereby the ,fluid is directed
plane of separation will preferably be as indicated
from the entrance through the .body of the discs
by the line 3a, Fig. 3 whereby the upper and lower
and into the inner channels between adjacent
halves are identical and, when positioned re
discs and to the central openings of the discs
versed upon one another, as shown, coact to form
when assembled, and means extending longitudi
45 nally of the central opening of the discs to receive
the groove or annular channel 3.
We claim:
the ?uid directed into said central opening ‘from
1. A ?lter made up of a plurality of independ
the discs and to direct the same outwardly be
ent elements assembled in superimposed relation,
yond the discs for discharge. ’
each element being of rigid porous material in
4. A construction as de?ned in claim 3 wherein
annular form with a central bore, the meeting 50 the inner margin of the discs forms a receiving
faces of the elements being each formed with
bore for the ?ltered material, and wherein said
abutments adjacent'its inner and outer margins,
means extending longitudinally of said central
the abutments at. the outer margins of adjacent
opening comprises a tube open to said bore for
elements continuously contacting to form a
discharging the ?ltered material to an outlet.
closed space of material area between abutting 55
5. A construction as de?ned in claim 3 wherein
faces of the elements at one end, the abutments
scraping elements are mounted in the entrance
at the inner margins of the elements being trans
channels of the discs, and wherein means are
Versely apertured to provide communication be
provided exterior of the disc assembly for moving
tween said space and the central bores of the
said scrapers throughout the respective channels
elements, the outer margin of each element be
for cleaning the same.
6. A construction as de?ned in claim 3 wherein
the entrance channel of each disc is provided
with a spring scraping blade and an operating
member connecting all such blades for simulta
neous scraping operation in the channels for
tween the faces thereof being formed with an an
nular recess providing an entrance channel for
2. A ?lter unit including a series of superim
posed annular discs of rigid, porous material,
each disc having a central bore with all bores
aligned in a series of discs, the meeting faces of
the discs being formed with abutments adjacent
their inner and outer peripheries, the abutments
cleaning purposes.
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