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Патент USA US3092587

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June 4, 1963
o. P. SATHER
3,092,577
PRESSURE LIQUID_FILTERING DEVICE
Filed Jan. 27, 1960
2 Sheets-Sheet 1
F/cs- Z
AWE/V701?
5/ 0am AS47215)?
ATM/QNEYS
June 4, 1963
o. P. SATHER
3,092,577
PRESSURE LIQUID FILTERING DEVICE
Filed Jan. 27, 1960
_
2 Sheets-Sheet 2
30/’ l --3/
5/
I
3,092,577.
Patented June 4., 1963
2
hood of such baskets becoming malformed through use.
Such baskets dent easily and soon become deformed to
3,092,577
PRESSURE LIQUID FILTERING DEVICE
Qlaf P. Sather, Duluth, Minn, assignor to Duluth Fiiter
Company, Duluth, Minn, a corporation of Minnesota
Filed Jan. 27, 1960, Ser. No. 4,905
3 Claims. (Cl. 210-232)
such an extent that they cannot be reused.
‘In this con
nection, it will be noted that through the use of such
baskets, it becomes necessary that the baskets and the
central core be washed thoroughly whenever the ?ltering
media is changed. Such washing requires considerable
This invention relates to pressure liquid ?ltering de
vices. More particularly, it relates to ?ltering devices
for ?ltering liquids which are forced through the device
time an effort and, in addition, frequently is the means
whereby such baskets become ‘damaged and deformed.
Still another disadvantage involved in the use of such
baskets is that it is extremely di?icult to remove the ?lter
while under pressure as is the case in diesel engines, etc.,
ing media from therewithin, for such ?ltering media
wherein large quantities of oil or similar ?uids must be
tends to become closely packed as the result of use of
?ltered before being used or reused. This invention re
the ?lter. Even more serious is the fact that the oil be
lates especially to the type of ?lter wherein it is necessary
or at least desirable that the ?lter media be readily dis 15 comes stiif when cold and under such conditions, it is ex
tremely difficult to remove the ?ltering media from the
posable and removable after its useful life span has termi
basket. My invention is designed to obviate each of these
nated.
disadvantages and to provide at the same time a more
In the ?ltering of oil and other ?uids which are used in
e?icient ?lter.
.
connection with the operation of diesel motors and the
‘One disadvantage of packing such a ?lter as described
like, it is conventional for the oil to be forced under pres 20
above with a ?ltering media is that when the media is
sure into a substantially closed container commonly re
placed within the basket in the manner described, it is
ferred to as a shell. Such a shell is provided with an
common for “channeling” to take place. “Channeling”
inlet and one or more outlets which in turn are connected
is a phenomenon commonly referred to when the oil or
to the part of the motor which is to again use the oil after
it has been ?ltered. -It is conventional for such a shell to 25 liquid to be ?ltered establishes one or more very de?nite
channels through which the oil passes without any ?lter
utilize a plurality of separate ?lters, one each for each out
ing taking place, while the bulk of the ?ltering media
let. :It is also conventional for such ?lters to be super
serves no ?ltering purpose whatever as a result of such
imposed on the outlet and connected thereto in such a
way that the oil or other liquid is forced through the ?l-,
by-passing of that portion of the media. My invention
ter by the pressure applied thereto and into a central core
which is connected to the outlet in ?uid-communicating
includes the provision of a ?lter constructed in a novel
manner so as to tend to eliminate or at least substantially
relation. The most commonly used and generally ac
cepted means which has been used heretofore has included
reduce the tendency toward “channeling.”
the utilization of a cylindrical screen or perforated basket
which has a closed top and bottom with an outlet in the
bottom adapted to engage and seat upon one of the shell
and improved pressure liquid ?ltering device which is sim
ple and inexpensive in construction and operation.
It is a general object of my invention to provide a novel
outlets in ?uid-communicating relation. The walls of
A more speci?c object is to provide a novel pressure
liquid ?ltering device which will effect a substantial sav
the cylindrical basket or screen are perforated with
ing
labor, initial cost, and maintenance.
Another object is to provide a novel pressure liquid
thousands of small ori?ces or openings through which the
?ltering device which will ?lter in a more e?icient man
oil may enter the interior of the basket. Such baskets
ner and which is completely and quickly disposable when
are generally provided with an upstanding rod member
the ?lter media is to be discarded.
.
that extends longitudinally of the basket and through the
Another object is to provide a pressure liquid ?ltering
top plate thereof. The upper end of such a rod generally
device which can be produced at a substantial saving in
has a reduced tip which extends into an index opening
in an index member rigidly supported by a plurality of 45 manufacturing cost and’ which will greatly facilitate the
substitution of a new ?ltering media when such substitu~
upstanding rods within the interior of the shell. Such an
tion is required.
index member is commonly in the form of a plate and
Another object is to provide a pressure liquid ?ltering
this plate serves to position the basket and press it down
device so constructed as to obviate the need for washing
wardly upon the outlet of the shell but does not prevent
by passing of the liquids at the upper end of the interior 50 a core and basket member, which will facilitate the re
moval of the ?ltering media, which will eliminate the cost
.of the baskets. Such a central rod or core member ex
tending upwardly through the basket is normally pro
. of replacement of basket members, and which will sub~
vided with openings or oil passageways so that the oil after
stantially reduce the initial cost of installation of the ?l
it has passed through the screen and the ?ltering media
tering media.
within the screen or basket, may pass downwardly into the 55
Another object is to provide a novel pressure liquid
?ltering device which can be readily substituted in pres
outlet of the shell. From this it will be readily appre
lciated that the ?ltering media is packed between the cen
tral rod and the screen or basket so that as the oil passes
inwardly through the screen or basket, it must pass
through the ?ltering media before it reaches the shell out 60
let.
.
-
ently used ?ltering shells in lieu of the conventional equip
ment heretofore used and at a substantial saving there
over, while at the same time providing an improved ?lter
ing function.
I
~
‘
These and other objects and advantages of my inven
tion will more fully appear from the following description
made in connection with the accompanying drawings
of problems and disadvantages. One disadvantage of
‘wherein like reference characters refer to similar parts
such baskets is the intial cost of the same. These baskets
throughout the several views and in which:
must be manufactured of quite costly material, such as 65
FIG. 1 is a side-elevational view of one of my improved
metal, and in view of their perforated nature and rigid
?lters and my indexing plug with portions thereof broken
construction, their cost is far from inexpensive. In addi
away and shown in section to more clearly illustrate the
tion, the use of such baskets involves the cost of replace
construction thereof;
ment, for it has been found through experience that if
FIG. 2 is a vertical sectional View on a reduced scale
such a basket can be used for a period exceeding one
of a conventional ?ltering shell, with its conventional'in
year. the user is indeed fortunate because of the likeli
dex member having one of my improved ?lters substituted
Such cylindrical screens or baskets present a'number
3,092,577
4
.3.
therein in lieu of the conventional basket-type construc- ,
noted that, the portion of the bottom 9 of the shell 5
tion ?lter;
which de?nes the outlet openings 10 is beveled as at ‘1041.
This ‘beveled seat aids in insuring a good seal between
the ?ltering means and the portions which de?ne the out
FIG. 3 is a top elevational view of my ?lter shown in
FIG. 2 with portions thereof broken away‘ to better il1us-'
trate the construction thereof;
> FIG. 4 is a plan view of an alternative form of indexing
plug which maybe used; and
lets 10.
‘
Reference to FIG. 1 shows that the core member 14
is manufactured with each of its ends open. I have pro
FIG. 5 is a vertical sectional view taken along line
S—5 of FIG. 4.
vided an indexing plug indicated generally by the numeral
of the ‘shell 5 in a manner well known in the art but not
in the conventional shell 5 as shown in H6. 1 with the
18 to obviate the need for the substantially solid upstand—
FIG. 2 shows a ?ltering shell indicated generally by the 10 ing central core member heretofore used in the basket
structures hereinbefore described. The plug indexing
numeral 5 having a cover member 6 and an index mem
member 18 has a cyllndrically. shaped imperforate plug
her 7 supported by a plurality of upstanding rods 8 which
portion 19 which is adapted to extend downwardly into the
are disposed within the interior of the shell and are rigidly
upper end of the‘core 14 as best shown in FIG. 2. This
secured to the bottom 9 thereof. It will be noted that
there is formed in the bottom 9 of the shell a plurality 15 plug member 19 precludes the entrance of oil through the
top of the ?lter and thereby vby-passing the ?lter. Secure-d
of oil outlets each indicated by the numeral 10 and it is
to the plugmember 19 at its upper end is an annular
conventionalin such construction to have one ?lter basket
?ange member Z? which extends radially outwardly from
superimposed over each of these outlets. For the sake of
the upper end of the plug portion 19. An upstanding
clarity, a ?ltering device is shown applied to one outlet
10 so that the device may be viewed in elevation. The 20 element 21 extends upwardly from the ?ange 20 and is
provided with a reduced tip~22 at the ‘extreme upper end,
shell 5' is provided with’ an oil inlet '11 through which
the ‘formation of this ‘tip resulting in a shoulder 23- which
oil is forced under pressure by the conventional diesel
is adapted to bear against the plate 7 when this ?ltering
motor (not shown). A master outlet 12~which is con
means'is inserted in the conventional construction.
nected toeach of the outlets 10 is also provided for the
In use, the ?ltering means shown in FIG. 2 is inserted
shell. The master inlet 11 is connected with the interior 25
lower end thereof perfecting a seal against the beveled
portion 10a of the material of the bottom 9 of the shell
Each of the rods 8 is provided with a. tightening screw
which de?nes the opening 10. The plug portion 19 of
13 at its upper end by means of which the index member
7 may be caused to bear and press downwardly upon the 30 the plug indexing ,member 18 is then inserted in the
upper end of the core 14 vand pressed downwardly until
separate ?ltering means which are superimposed upon the
the annular ?ange 2t} bears against theupper end of the
various outlets 10. In this manner, pressure may he apf
bag 16 ‘and the various ?ltering disks 15. The reduced
plied from above to insure that the ?ltering means will be
tip 22 is then inserted into the indexing member 7 in
pressed downwardly upon the portion of the shell 5 which
‘the openings provided within that member for ‘receiving
de?nes the outlet 10 to preclude the oil from ‘by-passing‘
the substantially solid core of the baskets heretofore used.
the ?ltering means and escaping through the outlet 10'.
illustrated in FIG. 1. .
' The construction de?ned above is conventional in the
?ltering of oil in diesel motors.
In addition. to this con
struction, there is generally utilized the basket ?lled with
‘a ?ltering media as described hereinbefore.
I have, dis
coveredhowever, that it ispossible to eliminate the use
or such a ?ltering basket and the substantially solid cen
tral core. which extends upwardly therethrough to engage
The screws 13 are then tightened to cause [the indexing
member 7 to bear against the shoulder 23 and press the
?lteringrmeansgdownwa-rdly in sealed relation to the bev
eled seat Illa. When the cover member 6 is tightened,
the ?ltering device is ready for use.
'
When the ?lter shown in FIG. 2' has been used for
a sui?ciently long period such that it must be replaced,
this replacement is an extremely simple matter. The
I have found that if} construct a
?lter having an elongated central porous core member 14 45 plug indexing member 18 is merely removed from the
index member 7 and from‘ the upper end of the ?lter
of rigid material such as heavy screen wire,. such a core
which is indicated generally by the letter F. This ?lter
, 'mentber will preclude longitudinal compressibility of the
F can be discarded in its entirety withoutrany substan
?lter. To this core member. 141 apply a plurality of
tial loss and a new ?lter F substituted therefor. It will
?lter disks or other ?ltering media 15 ‘which I vform out
of ?ltering media consisting of relatively long wood ?bers 50 be readily appreciated that this change of ?lter can be
and relatively short gun cotton ?bers, These disks 15,1
e?ected at a substantial saving of'time and eltort, for
there is no washing of parts required and, the removal
apply to the rigid core member 14 which, because of the
thereof is an extremely simple matter as compared to
nature of the material from which it is made, ‘is porous or
perforated so that oil, may readily pass therethrough. I
the laborious extractionof ?ltering media from a basket
also apply a .sock or. bag 16 to. the ‘disks, 15 of ?ltering 55 as heretofore practiced. It should be noted that the ?lter
media so as to hold these disks of the ?ltering media
F does not require any metal flanges or spool construc}
in ?ltering positionover the'openings 14a of the central . tion at the ends thereof, so that the ?lters F may be manu
core member14. The bag .16 is preferably-formed of a
Ltactured at a very substantial reduction in cost. The in
porous. fabric ,materialand is applied to the inner sur
dexing plug 18 can, of course, be reused ‘as long as de
faces as ‘well as the outersurfaces of the disks 15.. .Ref 60 sired arid may be merely applied to a new ?lter F when
'erence .to FIG. 2 will show that the bag 16 extends be
the ?ltering mediarnust be changed.
tween the Wire core 14 and the interior surfaces de?ning .
The use of my new pressure liquid ?ltering device sub
the index member 7.
the openings in the disks 15, and also extends outwardly
along the underside of the lower disks 15'and upwardly
stantially reduces the initial cost as well as the cost of
maintenance. In addition, there is a substantial saving
along the outer surfaces of each of the disks 15 and is 65 in the amount of time and labor required‘tto e?ect a
change. of the ?ltering media. I have ‘found that this
tiedwor similarlysecured at the end‘ vof the plurality of
disks so as to insure thatthe sock or ,bagrmember 16 can
type tof‘con-struction is readily accepted and desired by
not become loosened. In other words, a closing ?ap ex‘
tends down over the outside of the-upper disks 15' and
is overlapped on the outside by the upper portion of the
bag to ensure that all the disks v15 are enclosed. I also
provide an oil proof ?ber composition ring member 1'7 at
the bottom of the ?lter to‘ prevent distortion of the lower
end of the cartridge, or ?lter and a resultant poor seal
around the oil outlet 10. "In this connection it willlbe 75
owners of diesel engines.
.
FIGS. 4 and S'show a second form of indexing plug
indicated generally ‘by the numeral 30. It has, as shown,
a cylindrically shaped imperforate plug portion “31 which
is adapted to extend downwardly into the upper end of
the core 14 in :a manner similar to that shown in FIG.
1. This plug member 31 precludes the entrance of oil
through the top of the ?lter ‘and thereby by-passing the
3,092,577
5
?lter. Secured to the plug member 31 at its upper end
is an annular ?ange member 32 which extends radially
outwardly from the upper end of the plug portion 31.
An upstanding element 33 extends upwardly from the
?ange 32 and is provided with a concaved upper sur
with a portion of the bag member disposed in close ?t
ting relationship between said ?ltering media and the
other surface of said core member, one end of said bag
comprising a closing ?ap extending around one end of
the ?ltering media with the other end of said bag over
face 34 surrounded by an annular upwardly extending
shoulder element 35, which de?nes a type of socket which
lapping said closing ?ap and extending radially inwardly
It should also be noted that the ?ltering media which
member and said ?ltering media thereunder whereby the
over the one ,end of the ?ltering media, and an im
may be used to cooperate with a downwardly extending
perforate indexing plug having a cylinder shaped ele
peg on an indexing plate (not shown) to properly index
ment slidably extending in non-threading relation into
‘and hold the ?lter unit in proper position. It is believed 10 the end of said core member which is adjacent said one
readily understandable how the plug 39 may be used in
end of the ?ltering media and having an annular ?ange
lieu of the plug 18 when desired with such a modi?ed
element formed near one end of the cylinder-shaped ele
indexing plate.
ment bearing against said other end of the porous bag
I utilize is in ‘the form of a plurality of disks 15. I have 15 ?ange frictionally holds the ends of the bag against the
found that by forming the ?ltering media in the shape
of disks 15 I can greatly simplify the insertion of the
?ltering media within the vbag 16 and its application to
the core member 14.
In addition, I have found that ‘by
?ltering media, said indexing plug having axially dis
posed engaging means cooperatively engaging the en
gagea-ble means of the indexing member when said core
member is ‘so connected to such outlet to hold said core
so forming the ?ltering media, I have substantially 20 member in ?uid communicating relation with said liquid
eliminated or at least greatly reduced the tendency toward
outlet.
“channeling” which has heretofore been experienced in
2. The structure as de?ned in claim 1 including: an
?lter medias packed within Wire baskets and in prefab~
oil proof ring member concentrically arranged and dis
ricated cartridges.
posed at the end ‘of said core member which is adapted
It will, of course, be understood that various changes 25 to be connected to such liquid outlet, said oil proof ring
may be made in the form, details, arrangement and pro
member having a beveled seat concentrically formed
portions of the parts without departing from the scope
therein in liquid sealing relationship with such liquid
of my invention.
outlet and being enveloped along with said ?ltering media
What is claimed is:
by said porous bag member.
1. In a pressure liquid ?ltering device having a sub 30
3. The structure as de?ned in claim 1, wherein said
stantially closed shell having liquid outlet and a liquid
inlet connected to a source of liquid under pressure and
?ltering media is arranged in the form of a plurality of
radially extending equal diameter disks surrounding said
an indexing member Within the shell extending there
core member.
across and having engageable means for operatively po
sitioning a ?lter element in working relationship, said 35
References Cited in the ?le of this patent
?lter element comprising: an elongated substantially un
compressible hollow core member having open ends, one
UNITED STATES PATENTS
of which is adaptable to be connected to such a liquid
2,301,121
Kamrath ____________ .._ Nov. 3, 1942
outlet in liquid-transmitting relation, said core member
Vokes ______________ __ Sept. 3, 1946
having openings therein bringing the interior of said shell 40 2,407,046
2,507,125
Townsend ____________ __ May 9, 1950
into ?uid-communicating relation with such liquid outlet
2,545,374
Nugent ______________ __ Mar. 13, 1951
when so connected, hollow cincumferentially continuous
?ltering media concentrically surrounding the openings
of said core member; a porous bag member enveloping
said ?ltering media and securing and holding said ?lter 45
ing media in axially abutting and snug-?tting relation
2,654,483
2,731,150
2,731,152.
2,875,901
Ahlijian ______________ __ Oct. 6,
McCann ____________ __ Jan. 17,
Redner ______________ __ Jan. 17,
Bottum ______________ __ Mar. 3,
1953
1956
1956
1959
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