Patent US5622544A successfully refreshed from Google Patents.
US5622544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air dryer cartridge with filter retainer
Assignee: Bendix Commercial Vehicle Systems LLC
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Filing: 1995-07-05
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Granted: 1997-04-22
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Expires: 2015-07-05
Abstract
Abstract A desiccant cartridge for an air dryer of the type used for compressed air supply systems. The desiccant cartridge incorporates an internally disposed particulate filter element which functions to provide particulate filtration for air coming into the desiccant cartridge. The filter element further acts to apply a compressive loading against internal components within the desiccant cartridge insuring that these parts are firmly coupled and providing sealing engagement between components despite manufacturing tolerance variations in the component parts.
Inventors
- 👤 Dennis R. Shamine
- 👤 Larry E. Dienes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:50
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/26; B01D53/261; B60; B60T; B60T17/00; B60T17/002; B60T17/004; Y; Y10; Y10S; Y10S55/00; Y10S55/17
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
214 words
A desiccant cartridge for an air dryer for removing water from air flowing in a compressed air supply system and adapted to be mounted to a mounting surface of an air dryer body assembly, comprising: a load plate forming a mounting surface adapted to mate with said body assembly mounting surface, said load plate forming passageways communicating with said body assembly, a cup-shaped outer shell having an open end defining a perimeter edge engaging said load plate, an inner sleeve disposed within said outer shell having at least one end flange engaging said load plate, said outer shell and said inner sleeve defining a radial clearance space and an end clearance space for air flow through said cartridge, a desiccant material disposed in said inner sleeve, and a filter element disposed between said outer shell and said inner sleeve in at least a portion of said end clearance space wherein said filter element, said outer shell and said inner sleeve cooperate to form a compression zone and a non-compression zone, said filter element being at least partially compressed in said compression zone between said outer shell and said inner sleeve thereby exerting a force urging said inner sleeve into engagement with said load plate and said filter being substantially uncompressed in said non-compression zone.
Claim 2
Dependent Claim
214 words
A desiccant cartridge for an air dryer for removing water from air flowing in a compressed air supply system and adapted to be mounted to a mounting surface of an air dryer body assembly, comprising: a load plate forming a mounting surface adapted to mate with said body assembly mounting surface, said load plate forming passageways communicating with said body assembly, a cup-shaped outer shell having an open end defining a perimeter edge engaging said load plate, an inner sleeve disposed within said outer shell having at least one end flange engaging said load plate, said outer shell and said inner sleeve defining a radial clearance space and an end clearance space for air flow through said cartridge, a desiccant material disposed in said inner sleeve, and a filter element disposed between said outer shell and said inner sleeve in at least a portion of said end clearance space wherein said filter element, said outer shell and said inner sleeve cooperate to form a compression zone and a non-compression zone, said filter element being at least partially compressed in said compression zone between said outer shell and said inner sleeve thereby exerting a force urging said inner sleeve into engagement with said load plate and said filter being substantially uncompressed in said non-compression zone.
Claim 3
Dependent Claim
19 words
A desiccant cartridge according to claim 1 wherein said filter element further being disposed in said radial clearance space.
Claim 4
Dependent Claim
19 words
A desiccant cartridge according to claim 1 wherein said filter element is formed of layers of expanded metal mesh.
Claim 5
Dependent Claim
50 words
A desiccant cartridge according to claim 1 wherein said filter element is in the form of a cylinder having a sidewall with a plurality of local axial projections, said axial projections being compressed in said end clearance space compression zone and said sidewall being disposed in said radial clearance space.
Claim 6
Dependent Claim
22 words
A desiccant cartridge according to claim 4 wherein compression of said filter element is substantially limited to said filter element axial projections.
Claim 7
Dependent Claim
241 words
A desiccant cartridge for an air dryer for removing water from air flowing in a compressed air supply system and adapted to be mounted to a mounting surface of an air dryer body assembly, comprising: a load plate forming a mounting surface adapted to mate with said body assembly mounting surface, said load plate further having a seal surface opposite said mounting surface, said load plate forming passageways communicating with said body assembly, a cup-shaped outer shell having an open end defining a perimeter edge engaging said load plate, an inner sleeve disposed within said outer shell having at least one end flange engaging said load plate seal surface, said outer shell and said inner sleeve defining a radial clearance space and an end clearance space for air flow through said cartridge, a desiccant material disposed in said inner sleeve, and a filter element disposed between said outer shell and said inner sleeve in the form of a cylinder having a sidewall with a plurality of local axial projections, said axial projections being compressed in said end clearance space and said sidewall being disposed in said radial clearance space, wherein compression of said axial projections exerts a force urging said inner sleeve into engagement with said load plate and radially restrains said inner sleeve relative to said outer shell, and wherein air flowing into said radial clearance space passes through said filter sidewall and exits said filter between said axial projections.
Claim 8
Dependent Claim
241 words
A desiccant cartridge for an air dryer for removing water from air flowing in a compressed air supply system and adapted to be mounted to a mounting surface of an air dryer body assembly, comprising: a load plate forming a mounting surface adapted to mate with said body assembly mounting surface, said load plate further having a seal surface opposite said mounting surface, said load plate forming passageways communicating with said body assembly, a cup-shaped outer shell having an open end defining a perimeter edge engaging said load plate, an inner sleeve disposed within said outer shell having at least one end flange engaging said load plate seal surface, said outer shell and said inner sleeve defining a radial clearance space and an end clearance space for air flow through said cartridge, a desiccant material disposed in said inner sleeve, and a filter element disposed between said outer shell and said inner sleeve in the form of a cylinder having a sidewall with a plurality of local axial projections, said axial projections being compressed in said end clearance space and said sidewall being disposed in said radial clearance space, wherein compression of said axial projections exerts a force urging said inner sleeve into engagement with said load plate and radially restrains said inner sleeve relative to said outer shell, and wherein air flowing into said radial clearance space passes through said filter sidewall and exits said filter between said axial projections.
Claim 9
Dependent Claim
18 words
A desiccant cartridge according to claim 6 wherein said filter is formed of layers of expanded metal mesh.
References Cited (Backward Citations)
US1930357A
Cited
US2317816A
Cited
US2505581A
Cited
US2698061A
Cited
US3347387A
Cited
US3475885A
Cited
US3655906A
Cited
US3796025A
Cited
US4015959A
Cited
US4227901A
Cited
US4385913A
Cited
GB2126124A
Cited
US4505727A
Cited
FR2560063A3
Cited
DE3523406A1
Cited
US4713094A
Cited
US4816047A
Cited
US4946485A
Cited
US4908132A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-04-21 | 2000-10-21 | 2001-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-04-21 | 2004-10-21 | 2005-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-04-21 | 2008-10-21 | 2009-04-22 | $7700.00 | Window Closed / Lapsed |