US3959137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter having an interior liquid displacement means, apparatus and method
Assignee: Pall Filter Specialists Inc
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Filing: 1975-08-07
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Granted: 1976-05-25
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Expires: 1995-08-07
Abstract
Abstract A method of filtering and a filter having a housing in which a filtering screen having a bag-shaped configuration is located. A removable floatable container is located within the filter housing, inside the filter screen. The container includes parts which are spacedly positioned from the screen so as to enable liquid flow through the filter to pass around the container and through portions of the screen.
Inventors
- 👤 Richard D. Kirsgalvis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:15
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/11; B01D29/13; B01D29/23; B01D29/27; B01D29/88; B01D29/90; B01D29/902; B01D2201/00; B01D2201/30; B01D2201/301
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
219 words
A method for displacing liquid within a filter, said filter including a housing having a base member and a removable cap, said base member having an open top and being defined by side and bottom walls, said cap spanning the base member top, a reticulated filtering means carried within said housing and having portions spaced from said base member, said housing having a liquid inlet means in flow communication with the interior of said filtering means and a liquid outlet means in flow communication with said base member at said spaced filtering means portions, liquid within said base member, said method comprising the steps: a. providing a floatable container having an external transverse dimension which is less than the internal transverse dimension of said filtering means, b. removing the cap of said housing and inserting said container into said filtering means to displace a substantial portion of said liquid within said base member with said container being spaced from said filtering means at said base member bottom wall and at sections of said base member side wall, and c. replacing said cap over said base member top to enclose said container within said filtering means to accommodate liquid flow through said filter between said inlet and outlets and around said container with said container being buoyed by said liquid.
Claim 2
Independent Claim
219 words
A method for displacing liquid within a filter, said filter including a housing having a base member and a removable cap, said base member having an open top and being defined by side and bottom walls, said cap spanning the base member top, a reticulated filtering means carried within said housing and having portions spaced from said base member, said housing having a liquid inlet means in flow communication with the interior of said filtering means and a liquid outlet means in flow communication with said base member at said spaced filtering means portions, liquid within said base member, said method comprising the steps: a. providing a floatable container having an external transverse dimension which is less than the internal transverse dimension of said filtering means, b. removing the cap of said housing and inserting said container into said filtering means to displace a substantial portion of said liquid within said base member with said container being spaced from said filtering means at said base member bottom wall and at sections of said base member side wall, and c. replacing said cap over said base member top to enclose said container within said filtering means to accommodate liquid flow through said filter between said inlet and outlets and around said container with said container being buoyed by said liquid.
Claim 3
Dependent Claim
194 words
A filter for a liquid, said filter comprising a housing having a base member and a removable cap, said base member having an open top and being defined by side and bottom walls, said cap spanning said base member top, a bag-shaped reticulated filtering means carried within said housing and having portions spaced from said base member, said filtering means having a shape-retaining frame and including a side wall, said housing having a liquid inlet means in flow communication with the interior of said filtering means and a liquid outlet means in flow communication with said base member at said spaced filtering means portions, a removable floatable container means for decreasing the volumetric interior size of said filtering means, said container means fitting within said filtering means and having spaced projecting side wall means for contacting said filtering means side wall to space that portion of said container means extending between said projecting side wall means from said filtering means to define liquid flow passage means from said inlet means to said spaced filtering means portions wherein liquid in passing through said filter from said inlet to said outlet will flow around said container.
Claim 4
Dependent Claim
194 words
A filter for a liquid, said filter comprising a housing having a base member and a removable cap, said base member having an open top and being defined by side and bottom walls, said cap spanning said base member top, a bag-shaped reticulated filtering means carried within said housing and having portions spaced from said base member, said filtering means having a shape-retaining frame and including a side wall, said housing having a liquid inlet means in flow communication with the interior of said filtering means and a liquid outlet means in flow communication with said base member at said spaced filtering means portions, a removable floatable container means for decreasing the volumetric interior size of said filtering means, said container means fitting within said filtering means and having spaced projecting side wall means for contacting said filtering means side wall to space that portion of said container means extending between said projecting side wall means from said filtering means to define liquid flow passage means from said inlet means to said spaced filtering means portions wherein liquid in passing through said filter from said inlet to said outlet will flow around said container.
Claim 5
Dependent Claim
11 words
The filter of claim 2 wherein said container means is hollow.
Claim 6
Dependent Claim
10 words
The filter of claim 3 wherein said container is enclosed.
Claim 7
Dependent Claim
15 words
The filter of claim 2 wherein said projecting side wall means are fin shaped projections.
Claim 8
Dependent Claim
199 words
A filter for a liquid, said filter comprising a housing having a base member and a removable cap, said base member having an open top and being defined by side and bottom walls, said cap spanning said base member top, a bag-shaped reticulated filtering means carried within said housing and having portions spaced from said base member, said housing having a liquid inlet means in flow communication with the interior of said filtering means and a liquid outlet means in flow communication with said base member at said spaced filtering means portions, a removable closed container means for decreasing the volumetric interior size of said filtering means, said container means fitting within said filtering means and having side wall parts spaced from said filtering means defining liquid flow passage means from said inlet means to said spaced filtering means portions wherein liquid in passing through said filter from said inlet to said outlet will flow around said container, said filtering means including an end wall, said container means having an end wall fitting against and substantially sealing said filter means end wall from said liquid, said container means abutting said cap when said cap spans said housing base member.
Claim 9
Dependent Claim
199 words
A filter for a liquid, said filter comprising a housing having a base member and a removable cap, said base member having an open top and being defined by side and bottom walls, said cap spanning said base member top, a bag-shaped reticulated filtering means carried within said housing and having portions spaced from said base member, said housing having a liquid inlet means in flow communication with the interior of said filtering means and a liquid outlet means in flow communication with said base member at said spaced filtering means portions, a removable closed container means for decreasing the volumetric interior size of said filtering means, said container means fitting within said filtering means and having side wall parts spaced from said filtering means defining liquid flow passage means from said inlet means to said spaced filtering means portions wherein liquid in passing through said filter from said inlet to said outlet will flow around said container, said filtering means including an end wall, said container means having an end wall fitting against and substantially sealing said filter means end wall from said liquid, said container means abutting said cap when said cap spans said housing base member.
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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) | 1979-05-25 | 1979-11-24 | 1980-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-25 | 1983-11-24 | 1984-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-25 | 1987-11-24 | 1988-05-25 | $7700.00 | Window Closed / Lapsed |