US3669268A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid filter device
Assignee: Parker Hannifin Corp
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Filing: 1970-04-27
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Granted: 1972-06-13
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Expires: 1990-04-27
Abstract
Abstract A fluid filter device having a housing defining a fluid chamber with first and second inlet portions connected to a fluid inlet and an intermediate portion connected to a fluid outlet. A cylindrical filter element is disposed in the intermediate portion and is so arranged that fluid flows from the inlet portions into the interior of the filter element, radially through its walls and into the intermediate portion. Pressure responsive means are provided to move the filter element in response to a predetermined pressure increase in the inlet portions to simultaneously open fluid communication between both inlet portions and the intermediate portion, whereby fluid flows from the fluid inlet to the fluid outlet bypassing the filter element at opposite ends thereof.
Inventors
- 👤 Carl A Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:40
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/06; B01D35/14; B01D35/143; B01D35/147
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
299 words
A device for filtering fluid, comprising: a housing having an inlet and an outlet, the interior of said housing having a chamber including first and second inlet portions; means for fluidly connecting said first inlet portion with said inlet; an intermediate portion disposed between said first and second inlet portions and in fluid communication with said outlet; a filter assembly including a cylindrical filter element slidably carried in said housing chamber and normally disposed within said intermediate portion, first and second axially spaced sealing means associated with the opposite ends of the filter assembly, said sealing means being disposed between said filter assembly and said housing to normally preclude direct fluid communication between said inlet portions and said intermediate portion, the opposite ends of said filter element respectively registering with said first and second inlet portions such that the fluid in said first inlet portion flows axially through the interior of said filter element, into said second inlet portion, and then radially through the walls of said filter element and into said intermediate portion when said filter element is in said normal position; and pressure responsive means having one side exposed to the pressure of the fluid in one of said inlet portions and having a side opposite to said first side exposed to the pressure of the fluid in said intermediate portion, said filter element being movable in response to a predetermined increase in the pressure differential across said pressure responsive means to simultaneously open fluid communication between said first inlet portion and said intermediate portion proximate one end of said filter element, and open fluid communication between said second inlet portion and said intermediate portion proximate the other end of said filter element whereby the fluid flows from said inlet to said outlet, bypassing said filter element.
Claim 2
Independent Claim
299 words
A device for filtering fluid, comprising: a housing having an inlet and an outlet, the interior of said housing having a chamber including first and second inlet portions; means for fluidly connecting said first inlet portion with said inlet; an intermediate portion disposed between said first and second inlet portions and in fluid communication with said outlet; a filter assembly including a cylindrical filter element slidably carried in said housing chamber and normally disposed within said intermediate portion, first and second axially spaced sealing means associated with the opposite ends of the filter assembly, said sealing means being disposed between said filter assembly and said housing to normally preclude direct fluid communication between said inlet portions and said intermediate portion, the opposite ends of said filter element respectively registering with said first and second inlet portions such that the fluid in said first inlet portion flows axially through the interior of said filter element, into said second inlet portion, and then radially through the walls of said filter element and into said intermediate portion when said filter element is in said normal position; and pressure responsive means having one side exposed to the pressure of the fluid in one of said inlet portions and having a side opposite to said first side exposed to the pressure of the fluid in said intermediate portion, said filter element being movable in response to a predetermined increase in the pressure differential across said pressure responsive means to simultaneously open fluid communication between said first inlet portion and said intermediate portion proximate one end of said filter element, and open fluid communication between said second inlet portion and said intermediate portion proximate the other end of said filter element whereby the fluid flows from said inlet to said outlet, bypassing said filter element.
Claim 3
Dependent Claim
111 words
The filtering device defined in claim 1 wherein said sealing means comprises a first sealing element carried at the end of said filter element associated with said first inlet portion and slidably engaging the wall of said chamber in a fluid sealing relationship; a flange carried at the end of said filter element associated with said second inlet portion, said flange having a second sealing element carried thereon and slidably engaging the wall of said chamber in a fluid sealing relationship, said first and second sealing elements being concentric with their associated chamber walls such that said filter element is movable with respect to said chamber walls in an axial direction.
Claim 4
Dependent Claim
77 words
The filtering device defined in claim 2, including first and second openings respectively in the walls of said first inlet portion and said intermediate portion, said inteRmediate portion being in fluid communication with said first inlet portion via said first opening when said first mentioned sealing element traverses said first opening; and said intermediate portion being in fluid communication with said second inlet portion via said second opening when said second sealing element traverses said second opening.
Claim 5
Dependent Claim
29 words
The filtering device defined in claim 3, wherein said one side of said pressure responsive means is exposed to the pressure of the fluid in said second inlet portion.
Claim 6
Dependent Claim
74 words
The filtering device defined in claim 4, including a second pressure responsive surface carried by said filter element and having one side exposed to the pressure of the fluid in said first inlet portion, the pressure in said first inlet portion exerting a force on said second pressure responsive means urging said filter element in a direction which is opposite to the direction which said first mentioned pressure responsive means urges said filter element.
Claim 7
Dependent Claim
30 words
The filtering device as defined in claim 5, wherein the effective area of said first pressure responsive means is greater than the effective area of said second pressure responsive means.
Claim 8
Dependent Claim
64 words
The filtering device defined in claim 3, wherein said first inlet portion and said second inlet portion are respectively in fluid communication with said intermediate portion by means of first and second flow paths formed as said first and second sealing means respectively traverse said first and second openings, said second flow path being of a greater cross-sectional area than said first flow path.
Claim 9
Dependent Claim
87 words
The fluid device defined in claim 6, wherein said one side of said first pressure responsive means is formed on said flange; a seat formed in said intermediate portion, said one side of said flange abutting said seat to limit the amount of axial movement of said filter element into said second inlet portion, and including means normally biasing said flange into abutment with said seat, said filtering element being in said normal position when said one side of said flange is in abutment with said seat.
Claim 10
Dependent Claim
46 words
The filtering device defined in claim 8, wherein said biasing means comprises a spring disposed in said intermediate portion, one end of said spring abutting said opposite side of said flange, the other end of said spring being carried by a portion of said chamber wall.
Claim 11
Dependent Claim
36 words
The filtering device defined in claim 8, wherein said filter element is shiftable in an axial direction toward said first inlet portion as said first and second sealing elements respectively traverse said first and second openings.
Claim 12
Dependent Claim
29 words
The filter device defined in claim 10, including means operatively connected to said filter element to visually indicate the position of said filter element exteriorly of said filtering device.
References Cited (Backward Citations)
US3440802A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-13 | 1975-12-13 | 1976-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-13 | 1979-12-13 | 1980-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-13 | 1983-12-13 | 1984-06-13 | $7700.00 | Window Closed / Lapsed |