US4460468A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid filter with combined filtration bag and lid sealing gasket
Assignee: Pall Filter Specialists Inc
•
Filing: 1983-04-20
•
Granted: 1984-07-17
•
Expires: 2003-04-20
Abstract
Abstract A liquid filter with a unitary lid to housing seal and filtration bag. The seal is used as a gasket between the filter housing and the lid and is attached about the open upper end of the bag.
Inventors
- 👤 H. William Morgan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:18
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/11; B01D29/13; B01D29/23; B01D29/27; B01D29/88; B01D29/90
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
200 words
In a liquid filter including a housing having a side wall and a bottom wall, an inlet port and an outlet port, said housing having an opening defined by the upper end of said side wall, a lid spanning said housing opening, a removable filtration bag suspended within said housing and having an open upper end positioned between said inlet and outlet ports, the improvement wherein said inlet port includes a tubular protrusion extending upwardly from said housing side wall upper end in a spaced relationship from said housing opening, said lid including portions spaced above said bag open upper end and said inlet port protrusion to define a liquid flow passage between the protrusion and bag open upper end over a removable flexible generally planar seal, said seal unitarily attached to said bag about said bag open upper end, said seal extending peripherally about said housing opening and positioned between said housing side wall upper end and said lid to provide complete peripheral liquid sealing engagement between the lid and the housing, said seal having an opening spaced from said bag open upper end, said seal fitting at its said opening in sealing engagement around said inlet port protrusion.
Claim 2
Dependent Claim
200 words
In a liquid filter including a housing having a side wall and a bottom wall, an inlet port and an outlet port, said housing having an opening defined by the upper end of said side wall, a lid spanning said housing opening, a removable filtration bag suspended within said housing and having an open upper end positioned between said inlet and outlet ports, the improvement wherein said inlet port includes a tubular protrusion extending upwardly from said housing side wall upper end in a spaced relationship from said housing opening, said lid including portions spaced above said bag open upper end and said inlet port protrusion to define a liquid flow passage between the protrusion and bag open upper end over a removable flexible generally planar seal, said seal unitarily attached to said bag about said bag open upper end, said seal extending peripherally about said housing opening and positioned between said housing side wall upper end and said lid to provide complete peripheral liquid sealing engagement between the lid and the housing, said seal having an opening spaced from said bag open upper end, said seal fitting at its said opening in sealing engagement around said inlet port protrusion.
Claim 3
Dependent Claim
20 words
The liquid filter of claim 1 and a reticulated basket suspended in said housing, said bag extending into said basket.
Claim 4
Dependent Claim
159 words
A filtration unit for use in a liquid filter having a housing with an upper opening into the interior of the housing and a removable lid spanning said housing opening, said filter including an inlet port and an outlet port, said filtration unit comprising a liquid pervious bag having an opening and a flexible generally planar seal unitarily attached to said filter bag about its opening, said filtration unit adapted to fit in said liquid filter with said bag being received in said housing interior and said seal resting on said housing about said housing opening, said seal defining means for providing complete peripheral liquid sealing engagement between said lid and said housing and including a flange-like body having a peripheral bead adapted to be compressed between the lid and housing, said seal having opening means formed between said bead and said bag opening for positioning over said filter inlet port in a liquid-tight fit about the inlet port.
Claim 5
Dependent Claim
159 words
A filtration unit for use in a liquid filter having a housing with an upper opening into the interior of the housing and a removable lid spanning said housing opening, said filter including an inlet port and an outlet port, said filtration unit comprising a liquid pervious bag having an opening and a flexible generally planar seal unitarily attached to said filter bag about its opening, said filtration unit adapted to fit in said liquid filter with said bag being received in said housing interior and said seal resting on said housing about said housing opening, said seal defining means for providing complete peripheral liquid sealing engagement between said lid and said housing and including a flange-like body having a peripheral bead adapted to be compressed between the lid and housing, said seal having opening means formed between said bead and said bag opening for positioning over said filter inlet port in a liquid-tight fit about the inlet port.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-07-17 | 1988-01-16 | 1988-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-17 | 1992-01-16 | 1992-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-17 | 1996-01-16 | 1996-07-17 | $7700.00 | Window Closed / Lapsed |