Patent NL77415C successfully refreshed from Google Patents.
US3872012A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Particulate separator
Assignee: McDonnell Douglas Corp
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Filing: 1973-12-20
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Granted: 1975-03-18
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Expires: 1993-12-20
Abstract
Abstract A separator for removing particulate contamination from a flowing medium of a different density. The separator incorporates means such as a venturi for directing and accelerating the particulate into a predetermined location in the flow and a screen assembly located downstream of the director. The screen assembly extends across the location in the flow where particles are directed to enable the primary flow path of the medium to bypass the screens if need be. The screen assembly can be comprised of one or more stages which separate and entrap particles. The screen assembly may be spring mounted to accommodate variable velocity flow and may include means for regenerating the screens.
Inventors
- 👤 Donald L Endicott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:24
CPC Classifications
B; B01; B01D; B01D50/00; B01D50/20; B01D29/00; B01D29/50; B01D29/56; B01D29/58; B01D29/11; B01D29/117; B01D29/118; B01D29/88; B01D29/90; B01D35/00; B01D35/02; B01D46/00; B01D46/42; B01D46/4281; B01D46/44; B01D46/46; B01D2201/00; B01D2201/02; B01D2201/20; B01D2201/204; B01D2201/208; B01D2273/00; B01D2273/14
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
175 words
A separator for removing particulate contamination from a medium flowing in a predetermined direction in a conduit, the medium having a different density than the contamination, the separator including: venturi means to accelerate the flowing medium to flow in a direction different than said predetermined direction so that the contamination is concentrated in a predetermined downstream area of the flow and to recover the pressure drop caused by the acceleration; and means positioned in said predetermined downstream area of the flow to entrap and retain said particulate contamination, said last named means including a first screen, a second screen of finer mesh than said first screen and downstream therefrom and support means connected to said screens to support said first and second screens in said predetermined downstream area of the flow and spaced from the conduit whereby a primary flow path around said first and second screens is present, said first and second screens being connected together at at least one edge thereof and defining an entrapment zone therebetween in which the particulate is entrappEd.
Claim 2
Dependent Claim
175 words
A separator for removing particulate contamination from a medium flowing in a predetermined direction in a conduit, the medium having a different density than the contamination, the separator including: venturi means to accelerate the flowing medium to flow in a direction different than said predetermined direction so that the contamination is concentrated in a predetermined downstream area of the flow and to recover the pressure drop caused by the acceleration; and means positioned in said predetermined downstream area of the flow to entrap and retain said particulate contamination, said last named means including a first screen, a second screen of finer mesh than said first screen and downstream therefrom and support means connected to said screens to support said first and second screens in said predetermined downstream area of the flow and spaced from the conduit whereby a primary flow path around said first and second screens is present, said first and second screens being connected together at at least one edge thereof and defining an entrapment zone therebetween in which the particulate is entrappEd.
Claim 3
Dependent Claim
70 words
The separator defined in claim 1 wherein said first and second screens are conical in shape and connected at the circular edges thereof with said second screen having an enclosed conical angle which is less than the conical angle of the first so that said entrapment zone is defined therebetween, the apex of said first screen and the apex of said second screen being downstream from the connected edges thereof.
Claim 4
Dependent Claim
39 words
The separator defined in claim 2 including regeneration means, said regeneration means including a vent conduit extending from through the apex of said second screen to outside the flow conduit, said vent conduit being connected to said second screen.
Claim 5
Dependent Claim
41 words
The separator defined in claim 1 wherein said first and second screens are connected to and extend inwardly from the flow conduit and upstream, the connection of said first and second screens being upstream from their connections to the flow conduit.
Claim 6
Dependent Claim
44 words
The separator defined in claim 4 wherein the entrapment zone defined by said first and second screens extend to the flow conduit, the separator including means outside the flow conduit in flow communication with the entrapment zone to provide regeneration means for the screens.
Claim 7
Dependent Claim
19 words
The separator defined in claim 1 wherein said venturi means to accelerate the flowing medium include a reverse venturi.
Claim 8
Dependent Claim
70 words
The separator defined in claim 6 wherein said first and second screens are conical in shape and connected at the circular edges thereof with said second screen having an enclosed conical angle which is less than the conical angle of the first so that said entrapment zone is defined therebetween, the apex of said first screen and the apex of said second screen being downstream from the connected edges thereof.
Claim 9
Dependent Claim
39 words
The separator defined in claim 7 including regeneration means, said regeneration means including a vent conduit extending from through the apex of said second screen to outside the flow conduit, said vent conduit being connected to said second screen.
Claim 10
Dependent Claim
41 words
The separator defined in claim 6 wherein said first and second screens are connected to and extend inwardly from the flow conduit and upstream, the connection of said first and second screens being upstream from their connections to the flow conduit.
Claim 11
Dependent Claim
44 words
The separator defined in claim 9 wherein the entrapment zone defined by said first and second screens extend to the flow conduit, the separator including means outside the flow conduit in flow communication with the entrapment zone to provide regeneration means for the screens.
Claim 12
Dependent Claim
213 words
A separator for removing particulate contamination from a medium flowing in a predetermined direction in a conduit, the medium having a different density than the contamination, the separator including: venturi means to accelerate the flowing medium to flow in a direction different than said predetermined direction so that the contamination is concentrated in a predetermined downstream area of the flow; means positioned in said predetermined downstream area of the flow to entrap and retain said particulate contamination, said last named means including a first screen and a second screen of finer mesh than said first screen and downstream therefrom, said first and second screens being conical in shape and being connected at the circular edges thereof with said second screen having an enclosed conical angle which is less than the conical angle of the first so that an entrapment zone is defined therebetween in which the particulate is entrapped, the apex of said first screen and the apex of said second screen being normally downstream from the connected edges thereof; and spring arms which support said first and second screens spaced from the conduit so that said screens are moved downstream in response to increased flow velocity of the medium and are returned upstream in response to decreased flow velocity of the medium.
Claim 13
Dependent Claim
213 words
A separator for removing particulate contamination from a medium flowing in a predetermined direction in a conduit, the medium having a different density than the contamination, the separator including: venturi means to accelerate the flowing medium to flow in a direction different than said predetermined direction so that the contamination is concentrated in a predetermined downstream area of the flow; means positioned in said predetermined downstream area of the flow to entrap and retain said particulate contamination, said last named means including a first screen and a second screen of finer mesh than said first screen and downstream therefrom, said first and second screens being conical in shape and being connected at the circular edges thereof with said second screen having an enclosed conical angle which is less than the conical angle of the first so that an entrapment zone is defined therebetween in which the particulate is entrapped, the apex of said first screen and the apex of said second screen being normally downstream from the connected edges thereof; and spring arms which support said first and second screens spaced from the conduit so that said screens are moved downstream in response to increased flow velocity of the medium and are returned upstream in response to decreased flow velocity of the medium.
Claim 14
Dependent Claim
54 words
The separator defined in claim 11 including regeneration means connected to the enTrapment zone, said regeneration means including: a vent conduit extending from through the apex of said second screen to outside the flow conduit; and seal means connecting said vent conduit to said second screen and allowing relative upstream and downstream movement therebetween.
Claim 15
Dependent Claim
54 words
The separator defined in claim 12 including regeneration means connected to the entrapment zone, said regeneration means including: a vent conduit extending from through the apex of said second screen to outside the flow conduit; and seal means connecting said vent conduit to said second screen and allowing relative upstream and downstream movement therebetween.
Claim 16
Dependent Claim
14 words
The separator defined in claim 11 wherein said venturi means include a reverse venturi.
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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) | 1978-03-17 | 1978-09-16 | 1979-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-17 | 1982-09-16 | 1983-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-17 | 1986-09-16 | 1987-03-18 | $7700.00 | Window Closed / Lapsed |