US3771664A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter seal
Assignee: Delaware Capital Formation Inc
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Filing: 1972-07-05
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Granted: 1973-11-13
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Expires: 1992-07-05
Abstract
Abstract Filter and seal for use therein. In a filter having a mesh basket and a fabric liner contained therein for functioning as a filter medium, there is provided an elastomeric rim for engaging and holding the free edge of the liner. A filter tank and cover are arranged for holding the basket in operating position and for receiving said elastomeric rim between the tank and cover where it acts both to hold the liner similarly in operating position and also as a seal therebetween. Said seal thus comprises a multipurpose component in that it provides a fluid seal between the inside of the housing and the atmosphere, retains the rim of the fabric filter liner and supports same, seals the filtered liquid from the unfiltered liquid and insures that the fabric liner is centered in the mesh basket.
Inventors
- 👤 G Schrink
- 👤 R Jarman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:07
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/11; B01D29/13; B01D29/23; B01D29/27; B01D2201/00; B01D2201/30; B01D2201/301; B01D2201/304
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
225 words
In a filter construction including a filter tank having an unfiltered liquid zone and a filtered liquid zone, a filter basket and filter liner lining said basket for separating said two zones, an inlet into the unfiltered liquid zone, an outlet from the filtered liquid zone and means for centering said filter liner with respect to the filter basket and for sealing both against the bypassing of unfiltered liquid around the edge of said filter liner and against leakage of liquid from within the tank between its upper edge and a removable cover, the improvement in said lastnamed means comprising: an annulus at the upper edge of said tank and below said cover, said annulus having at least two internally facing steps therein; an outwardly projecting flange on said filter basket receivable snugly within the innermost of said steps; a resilient seal around the edge of said liner and received snugly in the radially outermost of said steps and normally projecting beyond the free axial end of said annulus; whereby when said cover is placed in operating position, said seal is compressed and functions to prevent the escape of liquid from within said filter outwardly between the cover and said annulus and functioning further to prevent the escape of liquid around the free edge of said liner from the unfiltered zone to the filtered zone.
Claim 2
Dependent Claim
225 words
In a filter construction including a filter tank having an unfiltered liquid zone and a filtered liquid zone, a filter basket and filter liner lining said basket for separating said two zones, an inlet into the unfiltered liquid zone, an outlet from the filtered liquid zone and means for centering said filter liner with respect to the filter basket and for sealing both against the bypassing of unfiltered liquid around the edge of said filter liner and against leakage of liquid from within the tank between its upper edge and a removable cover, the improvement in said lastnamed means comprising: an annulus at the upper edge of said tank and below said cover, said annulus having at least two internally facing steps therein; an outwardly projecting flange on said filter basket receivable snugly within the innermost of said steps; a resilient seal around the edge of said liner and received snugly in the radially outermost of said steps and normally projecting beyond the free axial end of said annulus; whereby when said cover is placed in operating position, said seal is compressed and functions to prevent the escape of liquid from within said filter outwardly between the cover and said annulus and functioning further to prevent the escape of liquid around the free edge of said liner from the unfiltered zone to the filtered zone.
Claim 3
Dependent Claim
64 words
The device of claim 1, wherein said flange projects axially beyond the radial surface of the outermost step to define with the axial surface of said outermost step a groove into which said seal may be received whereby when said seal is compressed it will bear snugly against the cover, said annulus and at least a portion of the outer surface of said flange.
Claim 4
Dependent Claim
15 words
The device of claim 1, wherein said seal is of generally U-shaped in radial section.
Claim 5
Dependent Claim
42 words
The device of claim 1, wherein said seal is generally U-shaped in radial section and has thickened portions near the end of said U whereby to define a recess therewithin of larger dimension than the space between the ends of the U.
Claim 6
Dependent Claim
59 words
The device of claim 4, including a ring for holding the outer edges of said filter liner and receivable into said recess whereby said liner, ring and seal provide an integrated unit for quick assembly with respect to said basket by placement of said flange on said innermost step followed by placement of said seal on the outermost step.
Claim 7
Dependent Claim
24 words
The device of claim 5, wherein both of said seal and said ring are made of compressible material for improving the sealing relationship therebetween.
References Cited (Backward Citations)
US1284944A
Cited
US1782531A
Cited
US2467503A
Cited
US3355026A
Cited
US3387433A
Cited
US3640392A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-12 | 1977-05-14 | 1977-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-12 | 1981-05-14 | 1981-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-12 | 1985-05-14 | 1985-11-13 | $7700.00 | Window Closed / Lapsed |