US3765152A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cleaning of filtering media
Assignee: General Resource Corp
•
Filing: 1970-11-04
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Granted: 1973-10-16
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Expires: 1990-11-04
Abstract
Abstract This invention provides an improved method and apparatus for maintaining the permeability of the porous filtering media used in filtering a gaseous suspension by providing an ever-open passage disposed in the path of fluid flow which, in turn, receives at an intermediate area the injection of compressed gas having the dual function of terminating normal flow through the passage, and providing a reverse flow by inducing other gaseous fluid into the ever-open passage to dislodge accumulated solids from the filtering media.
Inventors
- 👤 J Pausch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:17
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/02; B01D46/04; B01D46/0002; B01D46/0005; B01D46/06; B01D46/42; B01D46/4272; B01D46/4281; B01D46/66; B01D46/70; B01D46/71; B01D2265/00; B01D2265/06
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
25 words
The process claimed in claim 1, in which the pressurized fluid is admitted to said ever-open passage under the control of a variable sized orifice.
Claim 2
Dependent Claim
21 words
The process claimed in claim 1, in which the pressurized fluid is admitted to said ever-open passage through an annular orifice.
Claim 3
Dependent Claim
312 words
In apparatus for filtering solid particles from a gas in which they are suspended, embodying an enclosure formed with a gas inlet and a gas outlet; dividing means carried by the enclosure separating the interior thereof into two compartMents, said dividing means being formed with an aperture therein; a porous filtering element operably associated with the aperture in said dividing means and with the dividing means separating the interior of the enclosure into a dust-gas zone and a clean-gas zone, and in which said normally established flow occurs from said dust-gas zone to said clean-gas zone through said porous filtering element; and means for inducing the movement of said gas in a normal filtering flow through said filter and enclosure to accumulate particulate matter on one surface of said porous filtering element; the improvement of means coacting with the filter element to dislodge particles from the filter, comprising an ever-open passage formed of an aerodynamically configured venturi whose opposite open ends are disposed in the same one of said zones, so that all the inducted normal flow of gas between the zones traverses said filtering element and passage in a first direction; a source of compressed gas including a channel; means forming an annular passage for the compressed gas extending from said channel to the interior of said venturi passage at one end thereof and at an angle to the axis of the passage so that the compressed gas so admitted emerges into said venturi passage from the periphery thereof to form a converging cone with its apex on the axis of the venturi passage to block the normal flow through said passage and also induce the flow of a large volume of relatively clean gas from one of the zones to and through said venturi passage in a direction opposite the normal flow to dislodge accumulated particles from the filtering element.
Claim 4
Dependent Claim
25 words
The apparatus claimed in claim 4, in which the means forming the passage has its opposite ends disposed on opposite sides of the dividing means.
Claim 5
Dependent Claim
26 words
The apparatus claimed in claim 4, in which the means forming the passage has its opposite ends both disposed on one side of the dividing means.
Claim 6
Dependent Claim
24 words
The apparatus claimed in claim 4, in which the means forming the passage has both of its opposite ends disposed in the clean-gas zone.
Claim 7
Dependent Claim
24 words
The apparatus claimed in claim 4, in which the means forming the passage has both of its opposite ends disposed in the dust-gas zone.
References Cited (Backward Citations)
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Cited
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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) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |