US3803810A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid-gas separator and filter
Assignee: Pall Corp
•
Filing: 1972-06-14
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Granted: 1974-04-16
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Expires: 1992-06-14
Abstract
Abstract A filter unit that will not gas block is provided, capable of separating gases and liquids and of filtering liquids, and especially of removing and venting gases contained in liquids to be filtered, particularly liquids that must be filtered through a fine filter, such as in the filtration of bacteria. The device is based on a combination of three filters, arranged side-by-side, in alternate sequence. At least one filter is wetted by the liquid, and at least one is liquid-repellent; the liquid-wetted filter passes only the liquid, and the liquid-repellent filter passes only the gas. By employing three filters side-by-side, in alternate sequence, with two like filters on each side of the unlike filter of the three, the device is made positioninsensitive with respect to gas removal.
Inventors
- 👤 D Rosenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:52
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/36; A61M5/38; B; B01; B01D; B01D19/00; B01D19/0031; B01D29/00; B01D29/01; B01D29/012; B01D29/05; B01D36/00; B01D36/001; A61M5/14; A61M5/165; A61M2005/1657; A61M2205/00; A61M2205/75; A61M2205/7527; A61M2205/7536; A61M5/385; Y; Y10; Y10S; Y10S55/00; Y10S55/31
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
268 words
A liquid-gas separator and filter that is capable of separating gases and liquids and of venting the gases in any position of the separator, comprising, in combination, a housing composed of at least two housing portions attached together; one housing portion having interior walls defining first, second and third chambers arranged side-by-side; two housing portions defining between them a gas-liquid fluid chamber in separate fluid-flow connection with each of the first, second and third chambers; first, second and third filter sheets across the line of fluid flow between the fluid chamber and the first, second and third chambers, of which filter sheets at least one is of filter material that is wetted by a liquid to be passed through the housing, and at least one is of filter material that is not wetted by such liquid, and the other is of either filter material, the liquid-wetted and liquid-nonwetted filter sheets being arranged in alternating sequence and such that all flow between the fluid chamber and the three chambers must pass through a filter, the liquid-wetted filter passing only gas when wetted with liquid, and the liquid nonwetted filter passing only gas; an inlet in the housing for delivering fluid comprising gas and liquid to the fluid chamber; a filtered liquid outlet in the housing on the opposite side of each liquid-wetted filter; a gas outlet in the housing in the opposite side of each liquidnonwetted filter, the chamber on the opposite side of each liquid-wetted filter communicating with a liquid outlet, and the chamber on the opposite side of each liquid nonwetted filter communicating with a gas outlet.
Claim 2
Dependent Claim
268 words
A liquid-gas separator and filter that is capable of separating gases and liquids and of venting the gases in any position of the separator, comprising, in combination, a housing composed of at least two housing portions attached together; one housing portion having interior walls defining first, second and third chambers arranged side-by-side; two housing portions defining between them a gas-liquid fluid chamber in separate fluid-flow connection with each of the first, second and third chambers; first, second and third filter sheets across the line of fluid flow between the fluid chamber and the first, second and third chambers, of which filter sheets at least one is of filter material that is wetted by a liquid to be passed through the housing, and at least one is of filter material that is not wetted by such liquid, and the other is of either filter material, the liquid-wetted and liquid-nonwetted filter sheets being arranged in alternating sequence and such that all flow between the fluid chamber and the three chambers must pass through a filter, the liquid-wetted filter passing only gas when wetted with liquid, and the liquid nonwetted filter passing only gas; an inlet in the housing for delivering fluid comprising gas and liquid to the fluid chamber; a filtered liquid outlet in the housing on the opposite side of each liquid-wetted filter; a gas outlet in the housing in the opposite side of each liquidnonwetted filter, the chamber on the opposite side of each liquid-wetted filter communicating with a liquid outlet, and the chamber on the opposite side of each liquid nonwetted filter communicating with a gas outlet.
Claim 3
Dependent Claim
25 words
A liquid-gas separator and filter according to claim 1, wherein the liquid-wetted and the liquid-nonwetted materials have an average pore size less than 0.3 micron.
Claim 4
Dependent Claim
22 words
A liquid-gas separator and filter according to claim 1, wherein the housing and associated parts of the separator are made of plastic.
Claim 5
Dependent Claim
21 words
A liquid-gas separator and filter according to claim 1, wherein the parts are bonded or fused together in a one-piece construction.
Claim 6
Dependent Claim
16 words
A liquid-gas separator and filter according to claim 4, in which the parts are plastic parts.
Claim 7
Dependent Claim
21 words
A gas separator and filter according to claim 1, in which the three filters are arranged side-by-side in the same plane.
Claim 8
Dependent Claim
69 words
A liquid-gas separator and filter according to claim 1, in which said one housing portion has two fluid conduits on one side, one communicating at one end with a liquid outlet and at the other end with the chamber or chambers on the opposite side of each liquid-wetted filter, and one communicating at one end with the liquid-gas fluid inlet, and at the other end with the fluid chamber.
Claim 9
Dependent Claim
22 words
A liquid-gas separator and filter according to claim 1, wherein at least one of the filter materials is a microporous membrane filter.
Claim 10
Dependent Claim
28 words
A liquid-gas separator and filter as claimed in claim 1, wherein at least one of the filter materials comprises a porous substrate coated with a microporous fibrous layer.
Claim 11
Dependent Claim
27 words
A liquid-gas separator and filter as claimed in claim 1, wherein at least one of the filter materials comprises a porous substrate impregnated with a microporous layer.
Claim 12
Dependent Claim
24 words
A liquid-gas separator and filter according to claim 1, wherein at least one of the filter materials is supported on a foraminous sheet suppOrt.
Claim 13
Dependent Claim
22 words
A liquid-gas separator and filter according to claim 1, wherein the total volume of the four chambers is less than 1 cc.
Claim 14
Dependent Claim
17 words
A liquid-gas separator and filter according to claim 1, wherein the housing portions are of rigid material.
Claim 15
Dependent Claim
16 words
A liquid-gas separator and filter according to claim 1, wherein the housing is of transparent material.
Claim 16
Dependent Claim
16 words
A liquid-gas separator and filter according to claim 1, wherein the filter materials are each microporous.
References Cited (Backward Citations)
US3523408A
Cited
GB1221625A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-04-15 | 1977-10-15 | 1978-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-15 | 1981-10-15 | 1982-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-15 | 1985-10-15 | 1986-04-16 | $7700.00 | Window Closed / Lapsed |