Patent US1901605A successfully refreshed from Google Patents.
US3815754A
Expired / Lapsed
US
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Box filter
Assignee: Pall Corp
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Filing: 1971-09-16
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Granted: 1974-06-11
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Expires: 1991-09-16
Abstract
Abstract A disposable box filter is provided comprising a box housing in at least two portions and having a fluid chamber with two fluid ports, and a filter element in sheet form extending across the fluid chamber and held at its sides by the housing across the line of flow between the fluid ports.
Inventors
- 👤 D Rosenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:25
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/52; B01D46/521; A; A61; A61M; A61M16/00; A61M16/10; A61M16/105; A61M16/1055; A61M5/00; A61M5/14; A61M5/165; B01D29/00; B01D29/01; B01D29/012; B01D29/05; B01D29/07; B01D35/00; B01D35/02; B01D46/10
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
218 words
A disposable filter assembly comprising, in combination, a housing in a generally box-like configuration having two ends and at least four opposed sides defining therebetween a fluid chamber and at least two fluid ports; having outer side walls along the ends and two opposed sides, and having two sides open, at least two inner side walls spaced from the outer side walls and extending along said opposed sides; and a filter element in sheet form extending across the fluid chamber across a line of fluid flow between the fluid ports and held in a fluid tight seal extending the length of the inner side walls at opposed side portions of the filter element between an edge of the inner side walls and another portion of the housing; and side caps bonded in a fluid-tight seal to the housing, closing the open sides of the housing and the fluid chamber, and bonded in a fluid-tight seal to the sides of the filter element extending along said sides; the side caps, inner side walls and housing portion holding the filter element at opposed side portions, positioning the filter element across the fluid chamber, and sealing all side portions of the filter element within the housing, so that the fluid flow between the fluid ports must pass through the filter element.
Claim 2
Dependent Claim
218 words
A disposable filter assembly comprising, in combination, a housing in a generally box-like configuration having two ends and at least four opposed sides defining therebetween a fluid chamber and at least two fluid ports; having outer side walls along the ends and two opposed sides, and having two sides open, at least two inner side walls spaced from the outer side walls and extending along said opposed sides; and a filter element in sheet form extending across the fluid chamber across a line of fluid flow between the fluid ports and held in a fluid tight seal extending the length of the inner side walls at opposed side portions of the filter element between an edge of the inner side walls and another portion of the housing; and side caps bonded in a fluid-tight seal to the housing, closing the open sides of the housing and the fluid chamber, and bonded in a fluid-tight seal to the sides of the filter element extending along said sides; the side caps, inner side walls and housing portion holding the filter element at opposed side portions, positioning the filter element across the fluid chamber, and sealing all side portions of the filter element within the housing, so that the fluid flow between the fluid ports must pass through the filter element.
Claim 3
Dependent Claim
37 words
A disposable filter assembly in accordance with claim 1, wherein the housing is a box having four sides, two of the sides being defined by the side caps, and the filter element is in four-sided sheet form.
Claim 4
Dependent Claim
17 words
A disposable filter assembly in accordance with claim 2, wherein the filter element is in corrugated form.
Claim 5
Dependent Claim
16 words
A disposable filter assembly in accordance with claim 1, in which the fluid ports are coaxial.
Claim 6
Dependent Claim
23 words
A disposable filter assembly in accordance with claim 1, in which the filter element has a pore size of less than 50 microns.
Claim 7
Dependent Claim
23 words
A disposable filter assembly in accordance with claim 1, in which the filter element has a pore size of less than 0.3 micron.
Claim 8
Dependent Claim
17 words
A disposable filter assembly in accordance with claim 1, in which the housing is of plastic material.
Claim 9
Dependent Claim
18 words
A disposable filter assembly in accordance with claim 7, in which the plastic material is a thermoplastic resin.
Claim 10
Dependent Claim
16 words
A disposable filter assembly in accordance with claim 8, in which the thermoplastic resin is polypropylene.
Claim 11
Dependent Claim
69 words
A disposable filter assembly in accordance with claim 1, in which the housing is formed in two cooperating sections, each section including one end and one fluid port of the housing, and defining a portion of the opposed outer side walls, with the side wall portions terminating in mating edges, the sections being attached together at the mating edges, thereby completing the side walls and forming a one-piece housing.
Claim 12
Dependent Claim
42 words
A disposable filter assembly in accordance with claim 10, in which inner side walls are on one housing section, and the filter element is held at opposed side portions between the inner side walls and one end of the other housing section.
Claim 13
Dependent Claim
30 words
A disposable filter assembly in accordance with claim 11, in which the filter element is integrated to the housing sections by fusion thereof through the pores of the filter element.
Claim 14
Dependent Claim
29 words
A disposable filter assembly in accordance with claim 10, in which the two housing sections and the side caps are integrated together to form an integral one-piece filter assembly.
Claim 15
Dependent Claim
45 words
A disposable filter assembly in accordance with claim 10, in which the inner side walls are on one housing section and the other housing section has a projecting portion clamping the other side of the filter element against the edge of the inner side walls.
Claim 16
Dependent Claim
47 words
A disposable filter assembly in accordance with claim 14, in which the filter element is integrated to the housing sections by fusion of the projecting portion of one housing section with the inner side walls of the other housing section through the pores of the filter element.
Claim 17
Dependent Claim
46 words
A disposable filter assembly in accordance with claim 10, in which at least one housing section comprises a projecting member engaging and supporting one side of the filter element, and extending with the filter element across the chamber from side to the other of the chamber.
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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) | 1977-06-10 | 1977-12-10 | 1978-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-10 | 1981-12-10 | 1982-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-10 | 1985-12-10 | 1986-06-11 | $7700.00 | Window Closed / Lapsed |