CA1175081A - Ledge sealing gasket - Google Patents
Ledge sealing gasketInfo
- Publication number
- CA1175081A CA1175081A CA000399235A CA399235A CA1175081A CA 1175081 A CA1175081 A CA 1175081A CA 000399235 A CA000399235 A CA 000399235A CA 399235 A CA399235 A CA 399235A CA 1175081 A CA1175081 A CA 1175081A
- Authority
- CA
- Canada
- Prior art keywords
- annular
- seal portion
- filter element
- retainer plate
- walls
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Abstract
LEDGE GASKET
ABSTRACT
A filter element has a filter medium positioned between concentrically spaced cylindrical walls. A semi-flexible, urethane ledge gasket has an annular seal portion that sealingly engages ends of the walls, a generally circular retainer plate, and filter medium adjacent to the wall ends. An annular gripper surface extends inwardly from the seal portion and is spaced above the upper surface of the retainer plate. An annular lip extends outwardly from the seal portion.
ABSTRACT
A filter element has a filter medium positioned between concentrically spaced cylindrical walls. A semi-flexible, urethane ledge gasket has an annular seal portion that sealingly engages ends of the walls, a generally circular retainer plate, and filter medium adjacent to the wall ends. An annular gripper surface extends inwardly from the seal portion and is spaced above the upper surface of the retainer plate. An annular lip extends outwardly from the seal portion.
Description
~ BACKGROUND OF THE INVENTXOM ~175~81 This invention relates generally to gaskets and more particularly as reference to a ledge gasket adapted for use in a filter element.
Pertinent United S~ates and foreign patents are ~ound in Class 55, subclasses 492, 493, 498, 502, 509 and 510 and Class 210, subclasses 450, 454 and 459 of the oficia-l classifications of patents in the Uni~ed States Patent and Trademark Of~ice.
Examples of pertinent patents are United States Patent Nos. 4,128,251; 4,056,876; 3,877,910; 3,399,516; 2,871,976 and
Pertinent United S~ates and foreign patents are ~ound in Class 55, subclasses 492, 493, 498, 502, 509 and 510 and Class 210, subclasses 450, 454 and 459 of the oficia-l classifications of patents in the Uni~ed States Patent and Trademark Of~ice.
Examples of pertinent patents are United States Patent Nos. 4,128,251; 4,056,876; 3,877,910; 3,399,516; 2,871,976 and
2,732,031.
U.S. Patent No. 4,128,251 discloses a sealing gasket for an air filter. The gasket, preferably made of plastisol, has a soft base portion that provides a seal between the gasket and the filter medium.
In U.S. Patent No. 4,056,876, a hot-melt adhesive is used to attach a rim to a filter element. A tight seal is formed when the adhesive is cured.
U.S. Patent No. 3,877,910 discloses an air cleaner designed to withstand the impact of an automobile collision.
The cleaner has inner and outer casings. The outer casing gives upon impact,but the inner casing, formed of stronger material,resists. The retainer does not form a filter medium seal.
U.S. Patent 3,399,516 discloses two molded vinyl gaskets used to form a seal between the filter element and metal re-taining piece.
U.S. Patent 2,871j976 discloses a filter element used in an air-cleaner intake silencer. Two end caps, preferably formed of thermoplastic material, are molded to the ends of a filter medium. These caps form an air~tight seal with the filter medium and thus act as gaskets.
~ ~i ~'7~
U.S. Patent 2 t 732,031 discloses a sea,l and yasket combination used in an air'filter. ~ molded piece is heat~
treated and then allowed to cool while in contact with the paper element. The cooled piece acts as a seal and a gasket.
The prior art gaskets and seals proved generally adequate in sealing the end of the filter element itself, However, a second gasket was needed to provide a water seal between the filter element and the housing into which the çlement was inserted. That gasket was often fixed to the outer surface of a metal end retainer used to secure the filter element in'the housing.
, Means was also needed for facilitating removal of a used filter element from the housing. Generally, a metal plate or rim was welded to the metal end retainer for that, purpose, The plate or rim had-no sealing funation, The need for ~he three separate pieces, i,e,, a filter element seal, an element-to-housing water seal, and a finger grip for removal, resulted in high manuacturing costs and an unreliable and unwieldy prodùct, An object of the invention is , -therefore, to provide an improved seal for a filter elemen-t, Another object of the invention is to provide an improved filter element seal capable of performing several different and distinct ~unctions. Yet another object of the invention is to provide a filter element seal which eliminates the need for a separate element-to-housing water seal and a separate finger grip in a filter assembly.
According to the present invention there is provided a gasket adapted for use in a filter element having an end retainer plate, an inner wall defining an axial cavity, an outer wall concentrically spaced about the inner wall, and a filter medium positioned betwee~ th,e inner and ~uter walls ~7S08~
comprislng: an annular seal portion configured to extend across the open.space between the lnner and outer walls and sealingly engage ends of the walls and retainer plate r an annular llp extending outwardly from the seal portion tQ
prevent seepage rom the filter element, and an annular gripper portion extending inwardly from the seal portion, the lower surface of the gripper port~on being spaced above the upper surface of the retainer plate.
. The annular seal portion, the annular lip portion, and the annular grlpper portions of the gasket may be formed integrally of semi-flexible urethane.
These and other and further objects and features of the invention are apparent in the disclosure which includes the above and below specification and claims and drawings.
_ ...... . .. .. .. . _ .. .. . .. __ . . .. . . _ _ . . . . ..
~75 O ~
~ BRIEF DESCRIPTION OF T~IE DRAWINGS
. . . _ . _ . .
Figure l is a side elevational view, partly in section, of a filter elemen~ incorporating the features of the present invention.
Figure 2 is a sectional detail of a portion of the ~ilter element shown in Figure l.
Fig~xe 3 is a top plan view of the filter element shown in Figure l.
Figure 4 is a side elevational view, partly in section, of a filter assembly incorporating the features of the present invention.
Figure 5 is a sectional detail of a portion of the filter assembly shown in Figure 4.
DETAILED DESCRIPTION OF THE DRAWINGS
. . _ _ - A filter element embodying the features of the present invention is indicated generally by the numeral lO.
The filter element l0 has an inner cylindrical wall 12 which defines an axial cavity 14. An outer cylindrical wall 16 is concentrically spaced about the inner cylindrical wall 12. Both walls 12 and 16 are provided with openings which allow the filtrate to pass through the space between the walls 12 and 16. Preferably, the inner wall 12 is an expanded metal cylinder and the outer wall 16 is a perforated metal cylinder.
A filter medium 18 is positioned in the space between walls 12 and 16. The fllter medium 18 can be any of the conventional filter materials known in the art. Preferably, the filter medium l8 is paper.
~ s -The space between the walls 12 a~d 16 is sealed at both ends of the filter element 10. A conventional plastisol seal 20 is used at one end. The ledge gasket of the present invention, indicated generally by the numeral 22, is used at the opposite end.
The ledge gasket 22 has an annular seal portion 24 which sealingly engages the ends of the walls 12 and 16.
Filter medium 18 adjacen~ to those wall ends is also sealingly engaged by the seal portion 24. That configuration prevents unwanted matter from entering the space between the walls 12 and 16.
An annular lip 26 projects outwardly from the seal portion 24. The space 28 formed between the inner surface of the lip 26 and outer surface o~ the seal portion 24 is designed to receive the end of a filter element housing 30.
The relatlonship between the lip 26 and the filter element housing 30 is best shown in Figure 5. The lip 26 prevents water and other undesirable elements from seeping into the space between tke filter element 10 and the filter element housing 30.
An annular finger grip 32 extends lnwardly ~rom the seal portion 24. The finger grip 32 has a lower surface 34 which is spaced above the upper surface of a metal end retainer 36. The space 38 between the finger grip 32 and the retainer 36 is large enough to accommodate a finger tip . Wi th this arrangement, a user can easily remove the filter element 10 from its housing 30 by placing his finger on the lower surface 34 of the finger grip 32 and pulling ~he filter element 10 toward hims elf.
-6- ~g 7s~8~
The ledge gasket 22 is preerably a molded unltary elt ent. It can be formed of semi-~lexible urethane.
The metal end retainer 36 is a generally circular plate used to secure the filter element 10 in the filter element housing 30. The outer edge of the retainer 36 is embedded in the ledge gasket 22. Preferably, the outer edge of the retalner 36 has an axial portlon 40 which is spaced inwardly from the inner wall 12 and which extends into the ledge gasket 22 and a radial portion 42 which is spaced axially from the ends of ~he walls 12 and I6 and which terminates outwardly about midway between the walls 12 and 16.
I~hen in use, the filter element 10 is customarily seeured within a housing 30. A filter element and housing assembly incorporating the features of the present invention is best shown in Figure 4. The housing 30 is a cylindrical case designed to accommodate the ~ilter element 10, A threaded spindle 44 mounted in the housing 30 projects through an opening 46 in the retainer 36 when the filter element 10 is placed in the housing 30. A wing nut 46 is screwed onto the spindle 44 to secure the filter element 10. A user can withdraw the filter element 10 from the housing 30 by removing the wing nut 46 rom the spindle 44, placing his finger tip under the lower surface 34 of the inger grip 32, and pul~ing the filter element 10 toward himsel.
While the invention has been described with reference to a specific embodiment~ the exact nature and scope of the invention is defined in the followlng claims.
U.S. Patent No. 4,128,251 discloses a sealing gasket for an air filter. The gasket, preferably made of plastisol, has a soft base portion that provides a seal between the gasket and the filter medium.
In U.S. Patent No. 4,056,876, a hot-melt adhesive is used to attach a rim to a filter element. A tight seal is formed when the adhesive is cured.
U.S. Patent No. 3,877,910 discloses an air cleaner designed to withstand the impact of an automobile collision.
The cleaner has inner and outer casings. The outer casing gives upon impact,but the inner casing, formed of stronger material,resists. The retainer does not form a filter medium seal.
U.S. Patent 3,399,516 discloses two molded vinyl gaskets used to form a seal between the filter element and metal re-taining piece.
U.S. Patent 2,871j976 discloses a filter element used in an air-cleaner intake silencer. Two end caps, preferably formed of thermoplastic material, are molded to the ends of a filter medium. These caps form an air~tight seal with the filter medium and thus act as gaskets.
~ ~i ~'7~
U.S. Patent 2 t 732,031 discloses a sea,l and yasket combination used in an air'filter. ~ molded piece is heat~
treated and then allowed to cool while in contact with the paper element. The cooled piece acts as a seal and a gasket.
The prior art gaskets and seals proved generally adequate in sealing the end of the filter element itself, However, a second gasket was needed to provide a water seal between the filter element and the housing into which the çlement was inserted. That gasket was often fixed to the outer surface of a metal end retainer used to secure the filter element in'the housing.
, Means was also needed for facilitating removal of a used filter element from the housing. Generally, a metal plate or rim was welded to the metal end retainer for that, purpose, The plate or rim had-no sealing funation, The need for ~he three separate pieces, i,e,, a filter element seal, an element-to-housing water seal, and a finger grip for removal, resulted in high manuacturing costs and an unreliable and unwieldy prodùct, An object of the invention is , -therefore, to provide an improved seal for a filter elemen-t, Another object of the invention is to provide an improved filter element seal capable of performing several different and distinct ~unctions. Yet another object of the invention is to provide a filter element seal which eliminates the need for a separate element-to-housing water seal and a separate finger grip in a filter assembly.
According to the present invention there is provided a gasket adapted for use in a filter element having an end retainer plate, an inner wall defining an axial cavity, an outer wall concentrically spaced about the inner wall, and a filter medium positioned betwee~ th,e inner and ~uter walls ~7S08~
comprislng: an annular seal portion configured to extend across the open.space between the lnner and outer walls and sealingly engage ends of the walls and retainer plate r an annular llp extending outwardly from the seal portion tQ
prevent seepage rom the filter element, and an annular gripper portion extending inwardly from the seal portion, the lower surface of the gripper port~on being spaced above the upper surface of the retainer plate.
. The annular seal portion, the annular lip portion, and the annular grlpper portions of the gasket may be formed integrally of semi-flexible urethane.
These and other and further objects and features of the invention are apparent in the disclosure which includes the above and below specification and claims and drawings.
_ ...... . .. .. .. . _ .. .. . .. __ . . .. . . _ _ . . . . ..
~75 O ~
~ BRIEF DESCRIPTION OF T~IE DRAWINGS
. . . _ . _ . .
Figure l is a side elevational view, partly in section, of a filter elemen~ incorporating the features of the present invention.
Figure 2 is a sectional detail of a portion of the ~ilter element shown in Figure l.
Fig~xe 3 is a top plan view of the filter element shown in Figure l.
Figure 4 is a side elevational view, partly in section, of a filter assembly incorporating the features of the present invention.
Figure 5 is a sectional detail of a portion of the filter assembly shown in Figure 4.
DETAILED DESCRIPTION OF THE DRAWINGS
. . _ _ - A filter element embodying the features of the present invention is indicated generally by the numeral lO.
The filter element l0 has an inner cylindrical wall 12 which defines an axial cavity 14. An outer cylindrical wall 16 is concentrically spaced about the inner cylindrical wall 12. Both walls 12 and 16 are provided with openings which allow the filtrate to pass through the space between the walls 12 and 16. Preferably, the inner wall 12 is an expanded metal cylinder and the outer wall 16 is a perforated metal cylinder.
A filter medium 18 is positioned in the space between walls 12 and 16. The fllter medium 18 can be any of the conventional filter materials known in the art. Preferably, the filter medium l8 is paper.
~ s -The space between the walls 12 a~d 16 is sealed at both ends of the filter element 10. A conventional plastisol seal 20 is used at one end. The ledge gasket of the present invention, indicated generally by the numeral 22, is used at the opposite end.
The ledge gasket 22 has an annular seal portion 24 which sealingly engages the ends of the walls 12 and 16.
Filter medium 18 adjacen~ to those wall ends is also sealingly engaged by the seal portion 24. That configuration prevents unwanted matter from entering the space between the walls 12 and 16.
An annular lip 26 projects outwardly from the seal portion 24. The space 28 formed between the inner surface of the lip 26 and outer surface o~ the seal portion 24 is designed to receive the end of a filter element housing 30.
The relatlonship between the lip 26 and the filter element housing 30 is best shown in Figure 5. The lip 26 prevents water and other undesirable elements from seeping into the space between tke filter element 10 and the filter element housing 30.
An annular finger grip 32 extends lnwardly ~rom the seal portion 24. The finger grip 32 has a lower surface 34 which is spaced above the upper surface of a metal end retainer 36. The space 38 between the finger grip 32 and the retainer 36 is large enough to accommodate a finger tip . Wi th this arrangement, a user can easily remove the filter element 10 from its housing 30 by placing his finger on the lower surface 34 of the finger grip 32 and pulling ~he filter element 10 toward hims elf.
-6- ~g 7s~8~
The ledge gasket 22 is preerably a molded unltary elt ent. It can be formed of semi-~lexible urethane.
The metal end retainer 36 is a generally circular plate used to secure the filter element 10 in the filter element housing 30. The outer edge of the retainer 36 is embedded in the ledge gasket 22. Preferably, the outer edge of the retalner 36 has an axial portlon 40 which is spaced inwardly from the inner wall 12 and which extends into the ledge gasket 22 and a radial portion 42 which is spaced axially from the ends of ~he walls 12 and I6 and which terminates outwardly about midway between the walls 12 and 16.
I~hen in use, the filter element 10 is customarily seeured within a housing 30. A filter element and housing assembly incorporating the features of the present invention is best shown in Figure 4. The housing 30 is a cylindrical case designed to accommodate the ~ilter element 10, A threaded spindle 44 mounted in the housing 30 projects through an opening 46 in the retainer 36 when the filter element 10 is placed in the housing 30. A wing nut 46 is screwed onto the spindle 44 to secure the filter element 10. A user can withdraw the filter element 10 from the housing 30 by removing the wing nut 46 rom the spindle 44, placing his finger tip under the lower surface 34 of the inger grip 32, and pul~ing the filter element 10 toward himsel.
While the invention has been described with reference to a specific embodiment~ the exact nature and scope of the invention is defined in the followlng claims.
Claims (17)
1. A gasket adapted for use in a filter element having an end retainer plate, an inner wall defining an axial cavity, an outer wall concentrically spaced about the inner wall, and a filter medium positioned between the inner and outer walls comprising:
an annular seal portion configured to extend across the open space between the inner and outer walls and sealingly engage ends of the walls and retainer plate, an annular lip extending outwardly from the seal portion to prevent seepage from the filter element, and an annular gripper portion extending inwardly from the seal portion, the lower surface of the gripper portion being spaced above the upper surface of the retainer plate.
an annular seal portion configured to extend across the open space between the inner and outer walls and sealingly engage ends of the walls and retainer plate, an annular lip extending outwardly from the seal portion to prevent seepage from the filter element, and an annular gripper portion extending inwardly from the seal portion, the lower surface of the gripper portion being spaced above the upper surface of the retainer plate.
2. The apparatus of claim 1, wherein the annular seal portion, the annular lip, and the annular gripper portion are formed of semi-flexible urethane.
3. The apparatus claim 1, wherein the annular seal portion, the annular lip, and the annular gripper portions are formed integrally.
4. The apparatus of claim 1, wherein the annular seal portion, the annular lip, and the annular gripper portion are formed integrally of semi-flexible urethane.
5. The apparatus of claim 1, wherein the annular seal portion is further configured to sealingly engage filter medium adjacent ends of the walls.
6. In a filter element having an end retainer plate, an inner wall defining an axial cavity, an outer wall concentrically spaced about the inner wall, and a filter medium positioned between the inner and outer walls, the improvement comprising a gasket, said gasket comprising an annular seal portion configured to extend across the space between the inner and outer walls and sealingly engage ends of the walls and retainer plate, an annular lip extending outwardly from the seal portion and having an axially inward surface configurated to sealingly engage an edge of a housing receiving the filter element, and an annular gripper portion extending inwardly from the seal portion and being spaced axially from the outer surface of the retainer plate to form a space between said gripper portion and the retainer plate sufficient to accommodate a fingertip.
7. The filter element of claim 6, wherein the annular seal portion, the annular lip, and the annular gripper portion are formed of semi-flexible urethane.
8. The filter element of claim 6, wherein the annular seal portion, the annular lip, and the annular gripper portion are formed integrally.
9. The filter element of claim 6, wherein the annular seal portion, the annular lip, and the annular gripper portion are formed integrally of semi flexible urethane.
10. The filter element of claim 6, wherein the annular seal portion is further configured to sealingly engage an end of said filter-medium adjacent ends of the walls.
11. The filter element of claim 6, wherein the annular lip extends radially outwardly and axially inwardly.
12. The filter element of claim 6, wherein the annular lip extends radially outwardly and axially inwardly from the axially outward end of the seal portion to form a space between the inner surface of the lip and the outer surface of the seal portion for receiving said edge of the housing.
13. In a filter element having an end retainer plate, an inner wall defining an axial cavity, an outer wall concentrically spaced about the inner wall, and a filter medium positioned between the inner and outer walls, the improvement comprising a gasket, said gasket comprising an annular seal portion configured to extend across the space between the inner and outer walls and sealingly engage ends of the walls and retainer plate, an annular lip extending outwardly from the seal portion to prevent seepage from the filter element, and an annular gripper portion extending inwardly from the seal portion and being spaced axially from the outer surface of the retainer plate, wherein the end of the retainer plate has a radial portion which is embedded in the seal portion and which extends at least partially across the space between the inner and outer walls.
14. The filter element of claim 13, wherein the radial portion of the retainer plate terminates outwardly about midway between the inner and outer walls.
15. The filter element of claim 13, wherein the radial portion of the retainer plate is spaced axially from the ends of the inner and outer walls.
16. The filter element of claim 13, wherein the end of the retainer plate further has an axial portion which is at least partially embedded in the annular seal portion.
17. The filter element of claim 16, wherein the axial portion is spaced inwardly from the inner wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000399235A CA1175081A (en) | 1982-03-24 | 1982-03-24 | Ledge sealing gasket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000399235A CA1175081A (en) | 1982-03-24 | 1982-03-24 | Ledge sealing gasket |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1175081A true CA1175081A (en) | 1984-09-25 |
Family
ID=4122388
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000399235A Expired CA1175081A (en) | 1982-03-24 | 1982-03-24 | Ledge sealing gasket |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1175081A (en) |
-
1982
- 1982-03-24 CA CA000399235A patent/CA1175081A/en not_active Expired
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4349363A (en) | Filter element ledge gasket | |
| US5693109A (en) | Cylindrical air filter with radially directed seal | |
| US5730769A (en) | Air filter with scaling bead freely movable in the radial direction | |
| US7267706B2 (en) | Air filter | |
| AU752471B2 (en) | Dual filter assembly for a vacuum cleaner | |
| US5015375A (en) | Rechargeable filter assembly | |
| US5730766A (en) | Non-round unitary filter cartridge | |
| JP2605072B2 (en) | Air filter device | |
| US5984127A (en) | Resealable can cover | |
| US4243397A (en) | Air cleaner with replaceable filter element | |
| US4211543A (en) | Air cleaner with replaceable filter element | |
| AU669069B2 (en) | Compressible differential pressure energized seals for filter elements and the like | |
| US4304580A (en) | Air cleaner with suspended cartridge | |
| CA2069299C (en) | Filter bag seal | |
| EP1913855B1 (en) | Vacuum cleaner filter | |
| US3369666A (en) | Filter unit with anti-drain back valve means | |
| EP0377907B1 (en) | Filter and installation means for dry material filter for electric vacuum cleaner | |
| US4460468A (en) | Liquid filter with combined filtration bag and lid sealing gasket | |
| US5376271A (en) | Liquid filtration unit | |
| EP0518865B1 (en) | Heavy duty air filter with multipurpose end seal | |
| CA2597294A1 (en) | A filter cartridge having a filter element key | |
| US5964909A (en) | Filter cartridge sealing method | |
| CA2077279A1 (en) | Manhole Rim and Cover Assembly | |
| SK280167B6 (en) | Fuel filter and/or lubricating oil filter | |
| DE3363083D1 (en) | Bag filter device with pressure air cleaning |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEC | Expiry (correction) | ||
| MKEX | Expiry |