U.S. patent number RE34,031 [Application Number 07/532,224] was granted by the patent office on 1992-08-18 for filtering system.
This patent grant is currently assigned to Everpure, Inc.. Invention is credited to John W. Tadlock, Jack W. Thomsen.
United States Patent |
RE34,031 |
Thomsen , et al. |
August 18, 1992 |
Filtering system
Abstract
A filtering system for water treatment including a head member
having fluid inlet and outlet ports, a bracket member adapted to be
secured to stationary support means, the head member being secured
to the bracket member, a disposable filter cartridge closed at one
end and being equipped at its other end with a closure member, the
closure member having inlet and outlet passages formed therein to
communicate with the interior of said filter cartridge, the closure
member portion of the filter cartridge being insertable into the
head member, its inlet and outlet passages formed so as to
communicate with the inlet and outlet ports in the head member, and
coacting locking means formed on the head member and the bracket
member to secure the filter cartridge in place during operation of
the filter system and also permit easy insertion of the closure
member into and withdrawal of the closure member from the head
member.
Inventors: |
Thomsen; Jack W. (LaGrange
Park, IL), Tadlock; John W. (West Chicago, IL) |
Assignee: |
Everpure, Inc. (Westmont,
IL)
|
Family
ID: |
25174658 |
Appl.
No.: |
07/532,224 |
Filed: |
March 22, 1989 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
Issue Date |
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327305 |
Mar 22, 1989 |
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Reissue of: |
798948 |
Nov 18, 1985 |
04654142 |
Mar 31, 1987 |
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Current U.S.
Class: |
210/232; 210/249;
210/440; 210/282; 210/444 |
Current CPC
Class: |
B01D
24/14 (20130101); B01D 27/02 (20130101); B01D
27/08 (20130101); B01D 29/21 (20130101); B01D
29/27 (20130101); C02F 1/003 (20130101); B01D
27/06 (20130101); B01D 35/04 (20130101); C02F
2201/006 (20130101) |
Current International
Class: |
B01D
29/21 (20060101); B01D 29/13 (20060101); B01D
35/00 (20060101); B01D 35/04 (20060101); B01D
27/02 (20060101); B01D 27/00 (20060101); B01D
24/14 (20060101); B01D 24/02 (20060101); C02F
1/00 (20060101); B01D 027/02 (); B01D 027/08 () |
Field of
Search: |
;210/232,234,235,238,249,250,282,440,443,444,450,472 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
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1047171 |
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Dec 1958 |
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DE |
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1943946 |
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Mar 1976 |
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DE |
|
965328 |
|
Jul 1964 |
|
GB |
|
1028100 |
|
May 1966 |
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GB |
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Other References
AP500 Gold Published by AMF as Form B-18 pp. 1-4, Mar.
1979..
|
Primary Examiner: Therkorn; Ernest G.
Attorney, Agent or Firm: Thienpont; Frank R.
Parent Case Text
.Iadd.This is a continuation of copending application Ser. No.
07/327,305 filed on Mar. 22, 1989, now abandoned, which, in turn,
is a reissue of U.S. Ser. No. 798,948, filed Nov. 18, 1985, now
U.S. Pat. No. 4,654,142. .Iaddend.
Claims
What is claimed is:
1. A filter assembly comprising:
(a) a plate-like bracket member adapted to be supported on a
supporting wall structure, said bracket member including annular
opening means for receiving a closure member of a filter cartridge
therethrough, said opening means including a pair of oppositely
disposed bayonet openings,
(b) a head member attached to said bracket member for receiving a
filter cartridge therein, said head member comprising an inverted
cup-like structure having inlet and outlet ports in the wall
thereof and adapted to have a filter cartridge secured therein,
(c) a filter cartridge including
(1) a pressure vessel closed at one end,
(2) a closure member sealingly disposed in the open end of said
pressure vessel, said closure member including,
(a) an annular base portion which is fitted into and secured into
the open end of said pressure vessel,
(b) an elongated cylindrical portion formed integrally with said
base portion and adapted to be inserted into said head member in
sealing engagement therewith,
(c) a pair of axially extending inlet and outlet passages formed in
said elongated cylindrical portion,
(1) one of said passages being formed with a first communicating
port in the wall of said cylindrical portion,
(2) the other of said passages being formed with a second
communicating port in the wall of said cylindrical portion,
(3) said first and second communicating ports being in fluid
communication with the inlet and outlet ports of said head
member,
(d) a pair of radially extending bayonet locking lugs formed on the
outer surface of said closure member and adapted to be aligned with
said bayonet openings in said bracket member when the filter
cartridge is inserted into or removed from the head member,
(3) filter means disposed within said pressure vessel between the
inlet and outlet from said pressure vessel,
(4) said filter cartridge being positionable in said head member
and rotatable to a secured position wherein the bayonet locking
lugs coact with said plate-like bracket member and said head member
to secure the filter cartridge in place against the fluid pressure
of the system in which the filter assembly is disposed.
2. The filter assembly of claim 1 including
O-ring seal means disposed on the cylindrical wall of said closure
member in such manner as to separate the inlet port with its
associated inlet passage from the outlet port with its associated
outlet passage when the closure member is inserted into said head
member.
3. The filter assembly of claim 1 wherein
said head member includes circumferentially spaced stop means for
coacting with said bayonet lugs to limit the rotation of said
filter cartridge in said head member and thereby properly align at
least one of said fluid passages in said closure member with a
corresponding port in said head member.
4. The filter assembly of claim 1 wherein
said filter means includes a filter septum disposed in said
pressure vessel, said filter septum being connected with the outlet
passage in said closure member, and further including a filter
media disposed in said pressure vessel and surrounding said filter
septum.
5. The filter assembly of claim 4 wherein
said filter media is a granular activated carbon.
6. The filter assembly of claim 4 wherein
said filter media is a finely powdered material.
7. The filter assembly of claim 4 wherein
said filter media is a mixture of more than one type of powdered
materials, at least one of them being powdered activated
carbon.
8. The filter assembly of claim 1 wherein
said filter means includes a cylindrical filter cartridge disposed
in said pressure vessel, said cartridge being connected to the
outlet passage in said closure member.
9. The filter assembly of claim 1 wherein
at least one of said axially extending inlet and outlet passages
formed in the cylindrical portion of said closure member is offset
from the centerline of said cylindrical portion.
10. The filter assembly of claim 1 wherein
said bayonet locking lugs are of different sizes and said bayonet
openings are of correspondingly different sizes for effecting
proper alignment of passage means in said closure member with port
means in said head member.
11. A filter assembly comprising:
(a) a plate-like bracket member adapted to be supported on a
supporting wall structure,
(b) a head member attached to said bracket member for receiving a
filter cartridge therein, said head member comprising
an inverted cup-like structure having inlet and outlet ports in the
wall thereof and adapted to have a filter cartridge secured
therein,
(c) a filter cartridge including
(1) a pressure vessel closed at one end,
(2) a closure member sealingly disposed in the open end of said
pressure vessel, said closure member including,
(a) an annular base portion which is fitted onto and secured onto
the open end of said pressure vessel,
(b) an elongated cylindrical portion formed integrally with said
base portion and adpated to be inserted into said head member in
sealing engagement therewith,
(c) a pair of axially extending inlet and outlet passages formed in
said elongated cylindrical portion,
(1) one of said passages being formed with a first communicating
port in the wall of said cylindrical portion,
(2) the other of said passages being formed with a second
communicating port in the wall of said cylindrical portion,
(3) said first and second communicating ports being in fluid
communication with the inlet and outlet ports of said head
member,
(d) a pair of radially extending bayonet locking lugs oppositely
disposed on the outer surface of said closure member,
(3) filter means disposed within said pressure vessel between the
inlet to and outlet from said pressure vessel,
(4) means associated with said head member for coacting with said
radially extending bayonet locking lugs for securing said filter
cartridge in place in said head member against the fluid pressure
of the system in which the filter assembly is disposed.
12. The filter assembly of claim 11 including
a pair of O-ring seals disposed on the cylindrical wall of said
closure member in such manner as to separate the inlet port with
its associated inlet passage from the outlet port with its
associated outlet passage and further to seal the internal pressure
from the surrounding atmosphere when the closure member is inserted
into said head member.
13. The filter assembly of claim 11 wherein
said head member includes circumferentially spaced stop means for
coacting with said bayonet lugs to limit the rotation of said
filter cartridge in said head member.
14. In a filter assembly the combination comprising:
(a) a head member adapted to be disposed in a fluid conduit and
adapted to have a filter cartridge inserted thereinto, said head
member comprising
a cup-like structure having an annular bore formed therein and
inlet and outlet ports formed in the wall portion and communicating
with said bore, and
circumferentially spaced stop means associated with said head
member,
(b) a filter cartridge including
(1) a pressure vessel closed at one end,
(2) a closure member sealingly disposed in the open end of said
pressure vessel, said closure member including,
(a) an annular base portion which is fitted onto and secured onto
the open end of said pressure vessel,
(b) an elongated cylindrical portion formed integrally with said
base portion and adapted to be inserted into said head member in
sealing engagement therewith,
(c) a pair of substantially axially extending inlet and outlet
passages formed in said elongated cylindrical portion
(1) one of said passages being formed with a first communicating
port in the wall of said cylindrical portion,
(2) the other of said passages being formed with a second
communicating port in the wall of said cylindrical portion,
(3) said first and second communicating ports being in fluid
communication with the inlet and outlet ports of said head
member,
(d) cooperating means on said head member and said closure member
for aligning at least one of said ports in said head member and a
corresponding port in said closure member, and wherein said
cooperating means includes bayonnet locking lug means formed on
said closure member which coacts with said stop means.
15. The combination of claim 14 wherein
said cooperating means include a pair of radially extending
oppositely disposed bayonet locking lugs formed on said closure
member which coact with said stop means.
16. The combination of claim 14 wherein
at least one of said communicating ports in said elongated
cylindrical portion of said closure member is formed in the side
wall of said closure member.
17. The combination of claim 14 wherein
one of said communicating ports in said elongated cylindrical
portion of said closure member is formed in the end wall of said
closure member.
18. The combination of claim 14 including
a pair of O-ring seals disposed on the cylindrical wall of said
closure member in such manner as to separate the inlet port with
its associated inlet passage from the outlet port with its
associated outlet passage and further to seal the internal pressure
from the surrounding atmosphere when the closure member is inserted
into said head member.
19. The combination of claim 14 wherein
said head member includes an abutment with which said bayonet lugs
coact to allow the closure member of the filter cartridge to extend
into said head member a predetermined distance which is less than
the full depth of the cavity of the head member so as to create a
fluid well which establishes a fluid conduit between a port in the
wall of said head member and one of said communicating ports in
said closure member.
20. A filter assembly comprising:
(a) a plate-like bracket member adapted to be supported on a
supporting wall structure, said bracket member including annular
opening means for receiving a closure member of a filter cartridge
therethrough, said opening means including a pair of oppositely
disposed bayonet openings,
(b) a head member attached to said bracket member for receiving a
filter cartridge therein, said head member comprising
an inverted cup-like structure having inlet and outlet ports formed
therein and adapted to have a filter cartridge secured therein,
(c) a filter cartridge including
(1) a pressure vessel closed at one end,
(2) a closure member sealingly disposed in the open end of said
pressure vessel, said closure member including,
(a) an annular base portion which is fitted into and secured into
the open end of said pressure vessel,
(b) an elongated cylindrical portion formed integrally with said
base portion and adapted to be inserted into said head member in
sealing engagement therewith,
(c) a pair of axially extending inlet and outlet passages formed in
said elongated cylindrical portion amd adapted for fluid
communication with the inlet and outlet ports of said head
member,
(d) a pair of radially extending bayonet locking lugs formed on the
outer surface of said closure member and adapted to be aligned with
said bayonet openings in said bracket member when the filter
cartridge is inserted into or removed from the head member,
(3) filter means disposed within said pressure vessel between the
inlet and outlet from said pressure vessel,
(4) said filter cartridge being positionable in said head member
and rotatable to a secured position wherein the bayonet locking
lugs coact with said plate-like bracket member and said head member
to secure the filter cartridge in place against the fluid pressure
of the system in which the filter assembly is disposed.
21. The filter assembly of claim 20 including
O-ring seal means disposed on said closure member in such manner as
to separate the inlet passage from the outlet passage when the
closure member is inserted into said head member.
22. The filter assembly of claim 20 wherein
said head member includes circumferentially spaced stop means for
coacting with said bayonet lugs to limit the rotation of said
filter cartridge in said head member and thereby properly align at
least one of said fluid passages in said closure member with a
corresponding port in said head member.
23. The filter assembly of claim 20 wherein
said filter means includes a filter septum disposed in said
pressure vessel, said filter septum being connected with the outlet
passage in said closure member, and further including a filter
media disposed in said pressure vessel and surrounding said filter
septum.
24. The filter assembly of claim 23 wherein
said filter media is a granular activated carbon.
25. The filter assembly of claim 23 wherein
said filter media is a finely powdered material.
26. The filter assembly of claim 23 wherein
said filter media is a mixture of more than one type of powdered
materials, at least one of them being powdered activated
carbon.
27. The filter assembly of claim 20 wherein
said filter means includes a cylindrical filter cartridge disposed
in said pressure vessel, said cartridge being connected to the
outlet passage in said closure member.
28. A filter assembly comprising:
a bracket member for supporting a head member, said bracket member
being formed with an annular opening for receiving therethrough one
end of a filter cartridge and including a pair of circumferentially
spaced bayonet openings connected to said annular opening,
a head member formed with an inlet and outlet and attached to said
bracket member for receiving a filter cartridge therein,
a filter cartridge including a pressure vessel, a closure member
secured in the open end of said pressure vessel and containing or
adapted to contain a filter and further including an inlet and
outlet for communicating with the inlet and outlet of said head,
and
a pair of radially extending bayonet lugs formed on the outer
surface of said closure member which extends through said annular
opening means, said bayonet lugs, when the filter cartridge is
assembled in the head member in an operable position, coacting with
said bracket member to support the filter cartridge in such
operable position in said head member.
29. The filter assembly of claim 28 wherein
said bayonet lugs and the corresponding openings are of different
sizes so that the filter cartridge can be inserted into the head
member in a predetermined position.
30. The filter assembly of claim 28 wherein
counterbore means are formed in the head member, and
stop means are formed in said counterbore means for coacting with
said bayonet lugs to provide proper alignment of the inlet and
outlet ports in the filter cartridge and head member. .Iadd.
31. A filter assembly comprising
(a) a plate-like bracket member adapted to be supported on a
supporting wall structure, said bracket member, including annular
opening means for receiving a closure member of a filter cartridge
therethrough, said opening means including a pair of oppositely
disposed bayonet openings,
(b) a head member attached to said bracket member for receiving a
filter cartridge therein, said head member having inlet and outlet
ports formed therein,
(c) a filter cartridge including
(1) a pressure vessel closed at one end,
(2) a closure member sealingly disposed in the open end of said
pressure vessel, said closure member including,
(a) an annular base portion which is fitted into and secured into
the open end of said pressure vessel,
(b) a centrally disposed projecting portion formed integrally with
said base portion and adapted to be inserted into said head member
in sealing engagement therewith,
(c) a pair of axially extending inlet and outlet passages formed in
said projecting portion and adapted for fluid communication with
the inlet and outlet ports of said head member,
(d) a pair of radially extending bayonet locking lugs formed on the
outer surface of said closure member and adapted to be aligned with
said bayonet openings in said bracket member when the filter
cartridge is inserted into or removed from the head member,
(3) filter means disposed within said pressure vessel between the
inlet and outlet from said pressure vessel,
(4) said filter cartridge being positionable in said head member
and rotatable to a secured position wherein the bayonet locking
lugs coact with said plate-like bracket member and said head member
to secure the filter cartridge in place against the fluid pressure
of the system in which the filter assembly is disposed. .Iaddend.
.Iadd.
32. The filter assembly of claim 31 including
a shut-off valve associated with the inlet port in said head.
.Iaddend. .Iadd.33. The filter assembly of claim 31 including
O-ring seal means disposed on said closure member in such manner as
to separate the inlet passage from the outlet passage when the
closure member is inserted into said head member. .Iaddend.
.Iadd.34. The filter assembly of claim 31 wherein
said filter means includes a filter septum disposed in said
pressure vessel, said filter septum being connected with the outlet
passage in said closure member, and further including a filter
media disposed in said pressure vessel and surrounding said filter
septum. .Iaddend. .Iadd.35. The filter assembly of claim 34
wherein
said filter media is a granular activated carbon. .Iaddend.
.Iadd.36. The filter assembly of claim 34 wherein
said filter media is a finely powdered material. .Iaddend.
.Iadd.37. The filter assembly of claim 34 wherein
said filter media is a mixture of more than one type of powdered
materials, at least one of them being powdered activated carbon.
.Iaddend. .Iadd.38. The filter assembly of claim 31 wherein
said filter means includes a cylindrical filter cartridge disposed
in said pressure vessel, said cartridge being connected to the
outlet passage in
said closure member. .Iaddend. .Iadd.39. A filter assembly
comprising:
(a) a pressure vessel closed at one end and having filtering means
disposed therein,
(b) a closure member sealingly disposed in the open end of said
pressure vessel, said closure member including,
(1) an elongated cylindrical portion adapted to be inserted into a
head member in sealing engagement therewith,
(2) inlet and outlet passages formed in closure member, said inlet
and outlet passages being eccentrically disposed with respect to
the axis of said closure member,
(c) first and second axially spaced O-ring seals disposed on the
cylindrical wall of said closure member,
(d) a pair of radially extending bayonet locking lugs formed on the
outer surface of said closure member for securing the filter
cartridge in a filter assembly of which the filter cartridge is
adapted to be a part,
(e) a head member for receiving the filter cartridge therein and
having inlet and outlet ports which are adapted for fluid
communication with corresponding ports formed in said closure
member, and
(f) cooperative means on said locking lugs and said head member for
limiting the rotation of the cartridge with respect to said head
member to properly align at least one of the fluid passages in said
closure member
with a corresponding port in said head member. .Iaddend. .Iadd.40.
The filter assembly of claim 39 further including
a plate-like member adapted to be attached to a supporting
structure, said plate-like member including annular opening means
for receiving said closure member therethrough, said opening means
being formed with a pair of oppositely disposed bayonet openings
connected thereto for accommodating the passage therethrough of
bayonet lugs formed on said closure member, and
said filter cartridge being positionable in said head member and
rotatable to a secured position wherein the bayonet locking lugs
coact with said plate-like member and said head member to secure
the filter cartridge in place against the fluid pressure of the
system in which the filter
assembly is disposed. .Iaddend. .Iadd.41. A filter cartridge
comprising:
(a) a pressure vessel closed at one end,
(b) a closure member sealingly disposed in the open end of said
pressure vessel, said closure member including
(1) an annular base portion which is secured in the open end of
said pressure vessel,
(2) an elongated cylindrical portion formed integrally with said
base portion and adapted to be inserted into a head member in
sealing engagement therewith;
(3) a pair of substantially axially extending inlet and outlet
passages formed in said elongated cylindrical portion, said pair of
substantially axially extending inlet and outlet passages being
eccentrically disposed with respect to the axis of said closure
member,
(i) one of said passages being formed with a first communicating
port in the wall of said cylindrical portion,
(ii) the other of said passages being formed with a second
communicating port in the wall of said cylindrical portion,
(iii) said first and second communicating ports being adapted for
fluid communication with the inlet and outlet ports of a head
member with which said filter cartridge is adapted to be
associated,
(c) first and second axially spaced O-ring seals disposed on the
outer periphery of the cylindrical wall of said closure member,
(1) said first of said O-ring seals being axially spaced from and
disposed between said first and second communicating ports, and
(2) said second of said O-ring seals being axially spaced from and
disposed between one of said communicating ports and the atmosphere
for sealing the internal pressure from the surrounding atmosphere
when the closure member is inserted into a head member with which
the member is adapted to be associated,
(d) a pair of radially extending bayonet lugs formed on the outer
surface of said closure member for securing the filter cartridge in
a filter assembly of which the filter cartridge is adapted to be a
part, and
(e) filter means disposed within said pressure vessel between the
inlet and outlet from said pressure vessel, said filter means
including
(1) a filter septum disposed in the pressure vessel, said filter
septum being connected with the outlet passage in said closure
member, and
(2) filter media disposed in said pressure vessel and surrounding
said filter septum, the filter media being a granulated activated
carbon.
.Iaddend. .Iadd.42. A filter cartridge comprising:
(a) a pressure vessel closed at one end,
(b) a closure member sealingly disposed in the open end of said
pressure vessel, said closure member including
(1) an annular base portion which is secured in the open end of
said pressure vessel;
(2) an elongated cylindrical portion formed integrally with said
base portion and adapted to be inserted into a head member in
sealing engagement therewith;
(3) a pair of substantially axially extending inlet and outlet
passages formed in said elongated cylindrical portion, said pair of
substantially axially extending inlet and outlet passages being
eccentrically disposed with respect to the axis of said closure
member,
(i) one of said passages being formed with a first communicating
port in the wall of said cylindrical portion,
(ii) the other of said passages being formed with a second
communicating port in the wall of said cylindrical portion,
(iii) said first and second communicating ports being adapted for
fluid communication with the inlet and outlet ports of a head
member with which said filter cartridge is adapted to be
associated,
(c) first and second axially spaced O-ring seals disposed on the
outer periphery of the cylindrical wall of said closure member,
(1) said first of said O-ring seals being axially spaced from and
disposed between said first and second communicating ports, and
(2) said second of said O-ring seals being axially spaced from and
disposed between one of said communicating ports and the atmosphere
for sealing the internal pressure from the surrounding atmosphere
when the closure member is inserted into a head member with which
the member is adapted to be associated,
(d) a pair of radially extending bayonet lugs formed on the outer
surface of said closure member for securing the filter cartridge in
a filter assembly of which the filter cartridge is adapted to be a
part, and
(e) filter means disposed within said pressure vessel between the
inlet and outlet from said pressure vessel, said filter means
including
(1) a filter septum disposed in the pressure vessel, said filter
septum being connected with the outlet passage in said closure
member, and
(2) filter media disposed in said pressure vessel and surrounding
said filter septum, said filter media being a finely powdered
material.
.Iaddend. .Iadd.43. A filter cartridge comprising:
(a) a pressure vessel closed at one end,
(b) a closure member sealingly disposed in the open end of said
pressure vessel, said closure member including
(1) an annular base portion which is secured in the open end of
said pressure vessel;
(2) an elongated cylindrical portion formed integrally with said
base portion and adapted to be inserted into a head member in
sealing engagement therewith;
(3) a pair of substantially axially extending inlet and outlet
passages formed in said elongated cylindrical portion, said pair of
substantially axially extending inlet and outlet passages being
eccentrically disposed with respect to the axis of said closure
member,
(i) one of said passages being formed with a first communicating
port in the wall of said cylindrical portion,
(ii) the other of said passages being formed with a second
communicating port in the wall of said cylindrical portion,
(iii) said first and second communicating ports being adapted for
fluid communication with the inlet and outlet ports of a head
member with which said filter cartridge is adapted to be
associated,
(c) first and second axially spaced O-ring seals disposed on the
outer periphery of the cylindrical wall of said closure member,
(1) said first of said O-ring seals being axially spaced from and
disposed between said first and second communicating ports, and
(2) said second of said O-ring seals being axially spaced from and
disposed between one of said communicating ports and the atmosphere
for sealing the internal pressure from the surrounding atmosphere
when the closure member is inserted into a head member with which
the member is adapted to be associated,
(d) a pair of radially exending bayonet lugs formed on the outer
surface of said closure member for securing the filter cartridge in
a filter assembly of which the filter cartridge is adapted to be a
part, and
(e) filter means disposed within said pressure vessel between the
inlet and outlet from said pressure vessel, said filter means
including
(1) a filter septum disposed in the pressure vessel, said filter
septum being connected with the outlet passage in said closure
member, and
(2) filter media disposed in said pressure vessel and surrounding
said filter septum, said filter media being a mixture of more than
one type of powdered materials, at least one of them being powdered
activated carbon. .Iaddend.
Description
BACKGROUND OF THE INVENTION
This invention relates to a filtering system and more particularly
to a system in which a disposable filter cartridge can be quickly
inserted into and removed from a head member which is permanently
mounted in a fluid conduit.
SUMMARY OF THE INVENTION
An object of the invention is to provide in a water treatment
system a convenient economical filter assembly wherein a disposable
filter cartridge can easily be installed in the line by hand
without the user of cumbersome extra tools.
Another object is to provide a low cost filter assembly in which
the filter cartridge is easily locked and held in place under line
pressure conditions.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a sectional view in elevation taken along line 1--1 of
FIG. 2 of the filter assembly embodying the invention herein in an
assembled position;
FIG. 2 is a plan view of the bracket member and head member in
which the filter cartridge is mounted;
FIG. 3 is a plan view of the bracket member used for supporting the
filter cartridge and head member;
FIG. 4 is a front view of the bracket member of FIG. 3;
FIG. 5 is a sectional view in elevation of the closure member
fitted in the upper open end of the pressure vessel;
FIG. 6 is a top sectional view taken at line 6--6 of FIG. 5 showing
the shape of inlet and outlet passages at designated points in the
closure member;
FIG. 7 is a top sectional view taken at line 7--7 of FIG. 5 showing
the shape of inlet and outlet passages at other designated points
in the closure member;
FIG. 8 is a bottom plan view of the head member taken along line
8--8 of FIG. 1;
FIG. 9 is a sectional view in elevation of another embodiment of a
filter assembly embodying the invention;
FIG. 10 is a sectional view in elevation of still another
embodiment of a filter assembly embodying the invention;
FIG. 11 is a sectional view in elevation of a shut-off valve which
may be associated with the inlet to the filter assembly; and
FIG. 12 is a plan view taken along line 12--12 of FIG. 9.
DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring now to the drawings wherein like reference characters
refer to like parts the filter assembly 10 includes a bracket
member 12 for supporting a head member and a filter cartridge, a
head member 14 secured to the bracket member and a filter cartridge
16 which is inserted into and supported in the head member.
The bracket member 12 includes a generally laterally extending
plate-like portion 20 with a substantially vertically extending
integral portion 22. A pair of openings 26 are formed in vertical
portion 22 for mounting on a supporting structure. A reinforcing
plate 28 as seen in FIGS. 1, 3 and 4 adds strength to the bracket
member. The bracket member 12 may be mounted against the inside
wall of a tank or other supporting structure.
A circular opening 34 is formed in the laterally extending portion
20 for receiving therethrough the upper end of the filter
cartridge. A pair of oppositely disposed bayonet openings 36a and
36b are connected to the opening 34. The width A of opening 36 a is
narrower than width B of opening 36b for reasons to be subsequently
explained.
The head member 14 preferably of a molded plastic is an inverted
cylindrical cup-like structure formed with two oppositely disposed
flanges 38a and 38b by which it is secured to the bracket member. A
bore 40 is formed in the head member 14 for receiving the upper end
of a filter cartridge therein. A pair of ports 42 and 44, one and
inlet and the other an outlet, and formed in the cylindrical wall
46 of the head member. In the embodiment shown in FIG. 1 42 is the
inlet port and 44 is the outlet port although these may be reversed
depending on the type of filter arrangement within the pressure
vessel as will be subsequently described in connection with the
embodiment of FIG. 9. Appropriate connections made to these ports
42 and 44 is what incorporates the filter assembly into a fluid
conduit which provides the water to the unit or device which
ultimately uses the filtered or treated water.
The bore 40 is enlarged at its lower end in the form of a
counterbore 41. A pair of circumferentially spaced stops 48a and
48b are formed at the lower enlarged end of bore 40 to limit the
rotation of the filter cartridge 16 in the head member 14 as
hereinafter more fully explained.
The filter cartridge 16 of FIG. 1 includes a pressure vessel 50, a
closure member 52 a filter septum 54 and a filter media 56. The
filter cartridge is designed to be a disposable unit which may be
easily inserted into the head member 14 and removed therefrom by
hand all without the use of special tools.
The pressure vessel 50 which may be of metal or plastic is closed
at its lower end as shown in FIG. 1, and the closure member 52 is
sealingly fitted into the open end of the pressure vessel by
appropriate means.
The closure member 52 which preferably is made of a plastic
material includes an annular base portion 58, which is the portion
fitted into the open end of the pressure vessel, and an elongated
generally cylindrical portion 60 formed integrally with the base
portion. The cylindrical portion 60 is inserted into the head
member 14 in the filter assembly.
A pair of substantially axially extending fluid inlet and outlet
passages 62 and 64 are formed in the elongated cylindrical portion
60 of the closure member and as shown in FIGS. 1 and 5, 62 is the
inlet passage and 64 is the outlet passage. The passages 62 and 64
are both disposed slightly off center from the axis of the closure
member. A fluid port 66 is formed in the sidewall of the
cylindrical portion 60 in communication with passage 62. A fluid
port 68 is formed in the upper end of cylindrical portion 60 in
communication with passage 64. In the assembly of FIG. 1 fluid port
66 communicates with inlet port 42 formed in head member 14, and
fluid port 68 communicates with outlet port 44 formed in head
member 14. As will be noted from FIG. 1 when the closure member of
the filter cartridge is in place in the head member, the closure
member does not extend to the very top of the head member thus
leaving a well 70 at the upper end of the head member which
communicates with the fluid port 68, outlet passage 64 and outlet
port 44.
O-ring seals 72 and 74 are disposed on the outer surface of the
closure member. It will be observed that O-ring seal 72 is disposed
at the upper end of the closure member so that in the assembly,
inlet fluid entering the filter assembly by way of inlet port 42
will be sealed off from outlet fluid exiting through port 44.
O-ring seal 74 is positioned at a point on the closure member to
prevent leakage of inlet fluid to the outside.
A pair of oppositely extending bayonet lugs 76 and 78 are formed on
the exterior of cylindrical portion 60 of the closure member 52.
When the filter cartridge is inserted into the head member, the
cylindrical portion 60 of the closure member with its attached
bayonet lugs must first pass through opening 34 and bayonet
openings 36a and 36b in the bracket member 12. As previously
mentioned the bayonet openings 36a and 36b are of different sizes,
one being narrower than the other. Likewise the bayonet lugs are of
correspondingly different sizes one being narrower than the other
so that the filter cartridge can be inserted into the head member
in only one position. A counterbore 41 of predetermined depth in
the lower end of the head member 14--substantially the same depth
as the thickness of the bayonet lugs--limits the depth to which the
filter cartridge can be inserted into the head member.
After insertion into the head member the filter cartridge is then
rotated a quarter turn until the one side of each of the bayonet
lugs 76 and 78 come to rest against stops 48a and 48b. Rotation of
the filter cartridge to this position aligns the fluid inlet port
66 in the side wall of cylindrical portion of the closure member
with inlet port 42 in the head member. The filter cartridge now
also is clamped in position ready to withstand fluid pressure in
the fluid system which might tend to disengage the filter cartridge
from the head member, because the bayonet lugs 76 and 78 are
secured between the bracket member and the bottom of counterbore
41. Thus the bayonet lugs are effective through coaction with the
stop means to align the fluid port means and are further effective
through coaction with the bracket member to secure the filter
cartridge against being blown out of the head member.
A tubular screen strainer 80 is associated with the fluid inlet
passage 62, the upper end of the strainer 80 being attached to the
closure member by some appropriate well-known means.
One type of filter means that may be used in the filter cartridge
includes the filter septum 54 as shown in FIG. 1. It may be made,
for example, of a woven material. It is disposed near the bottom of
the pressure vessel and attached to the outlet passage 64 by a tube
82 which in turn is attached to the closure member and forms part
of the outlet passage 64. The filter means also may include a
filter media 56 which may fill up as much as 2/3 or more of the
pressure vessel. The filter media preferably is a granular
activated carbon. Therefore, when influent enters the inlet 42 and
proceeds through inlet passage 62 it moves through the filter media
56, then through the collector or filter septum 54, into tube 82
and out through the outlet passage 64 and outlet port 44.
The insertion and removal of the disposable filter cartridge from
the system is a simple task. Since influent, usually water, is
supplied to the system under pressure, a shut-off valve (not shown)
usually will be provided in the inlet line somewhere upstream from
inlet port 42. This valve is shut off during installation or
replacement of a filter cartridge into the system. With the
shut-off valve closed the filter cartridge is inserted into the
head member by lining up the bayonet lugs 76 and 78 with the
appropriate size bayonet openings 36a and 36b. Once properly lined
up the filter cartridge is inserted into the head member until the
bayonet lugs contact the shoulder 84 and then turned a quarter turn
until the bayonet lugs contact the tops 48a and 48b. Opening the
shut-off valve again places the system in operation.
Two additional embodiments are shown in FIGS. 9 and 10. The
embodiments of FIGS. 9 and 10 differ from that of FIG. 1
principally in the use of a different type of filter within the
pressure vessel. In the embodiment of FIG. 10, for example, a
cylindrical filter unit 90 is used. It is formed with a central
passage 92 closed at its lower end which is aligned with outlet
passage 64 in the closure member. The unit 90 may be a string wound
filter unit or a spun bonded unit. A spirally wound cartridge also
may be used. In each case the influent water enters through inlet
port 42, fills the pressure vessel and passes radially inwardly
through the filter unit 90 to the center thereof into central
passage 92 and out through outlet passage 64 and outlet port
44.
In the embodiment of FIG. 9 the use of a folded or pleated filter
septum 94 is illustrated. Powdered filter media 96 also at least
partially fills the pressure vessel 50. The filter media could be
finely powdered carbon and/or other well known powdered filter
media, such, for example, as diatomaceous earth or powdered silver
cellulose. The septum 94 is connected to and supported on a septum
support tube 95 which is connected to passage 62. The tube 95 thus
functions both as a septum support tube and as an outlet tube from
the septum 94 to carry filtered liquid from the septum 94 through
inlet 97 in support tube 95 and then to passage 62. In this
embodiment the inlet and outlet ports and passages are
reversed--port 44 becomes the inlet port and port 42 becomes the
outlet port. An inlet tube 98 is connected to passage 64 of the
closure member and extends down through the filter septum 94 to the
bottom of the pressure vessel.
A check valve 100, which may be of the flapper type, is connected
to the lower end of tube 98. Inlet fluid, therefore, passes
downwardly through tube 98, check valve 100 and the powdered filter
media 96, through the filter septum 94, through tube 95 and out
through passage 62 and outlet port 42.
In this particular embodiment of FIG. 9 a shutoff valve 104 as
shown, for example, in FIG. 11 may be mounted in the upper end of
head member 14 to control the inlet of fluid into the filter
cartridge through the inlet port. As shown in FIG. 11 the head
member 14 can be slightly modified by adding thereto an elongated
boss 106 into which an elongated stem 108 of the shut-off valve
extends. The lower end of the stem 108 controls the inlet of fluid
through port 44a. When the filter cartridge is to be replaced the
shut-off valve 104 is closed so that the cartridge can be removed
and replaced without being subject to fluid pressure at the
inlet.
While a preferred embodiment of the invention has been disclosed,
it will be appreciated that this is shown by way of example only,
and the invention is not to be limited thereto as other variations
will be apparent to those skilled in the art and the invention is
to be given its fullest interpretation within the terms of the
following claims.
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