Patent US3811254A successfully refreshed from Google Patents.
US3811254A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine air particle separator with fluid scavenge pump
Assignee: RTX Corp
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Filing: 1972-05-08
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Granted: 1974-05-21
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Expires: 1992-05-08
Abstract
Abstract A scavenge pump in the form of tubular member is connected to the bottom wall of the housing of an engine air particle separator and is shaped to define an annular ejector so that as heated fluid is passed through the annular ejector the portion of the scavenge pump nearest the separator is heated by convection to prevent ice formation and the heated air from the ejector is discharged to form a low pressure region in the tubular member and is passed along the inner wall of the tubular member to prevent ice formation thereagainst, thereby permitting the scavenge of liquid and gases, which may be below the freezing temperature in the low pressure region of the separator, to be discharged through said tubular member due to the operation of the scavenge pump.
Inventors
- 👤 A Amelio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:36
CPC Classifications
B; B01; B01D; B01D45/00; B01D45/12; F; F02; F02C; F02C7/00; F02C7/04; F02C7/05; F02C7/052; F04; F04F; F04F5/00; F04F5/44; F04F5/46
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
413 words
An air filter adapted to be attached to the inlet of an air breathing engine and including: A. an inner wall member shaped to define a passageway therewithin having an inlet opening and an outlet opening adapted to be connected to an air breathing engine inlet in axial alignment, B. an outer wall member communicating with atmosphere and enveloping said inner wall member and spaced therefrom to define a chamber therebetween, C. a plurality of centrifugal separator tube members each extending between and through said wall members and having an inlet connected to said outer wall to communicate with atmosphere external of said outer wall member and also having a clean air outlet connected to said inner wall and communicating with said passageway within said inner wall member and further having a separated particle outlet into said chamber, and still further having means to apply centrifugal force to the atmospheric air between said inlet and said separated particle outlet so that material separated from the atmospheric air in passing through said centrifugal force applying means will enter said chamber and clean air will enter said passageway, D. means connecting said wall members to said separator tube members and to each other so that the only gas flow paths between said wall members is through said separator tube members, E. scavenge means connected to said chamber and applying a suction thereto to scavenge the separated material therefrom, F. and door means positioned in said inlet opening of said inner wall member and mounted and shaped to be movable between a first position to block air flow into said passageway so that all air entering said passageway must pass through said centrifugal separator tube members and a second position to permit air flow through said inlet opening and into said passageway, G. a fluid scavenge pump comprising: 1. tube means mounted in the bottom of said inner wall member and having an inlet opening into the inner wall member interior and oriented to constitute a drain therefrom and having an outlet and including: a. annular ejector defining means near the inlet of said tube means shaped to define an annular passage around said tube means and an annular ejector outlet therefrom oriented to discharge along the inner wall of said tube means toward the outlet end thereof so that fluid passed through said annular ejector defining means will create a suction to cause accumulated fluid to scavenge from said housing and through said tube means.
Claim 2
Dependent Claim
413 words
An air filter adapted to be attached to the inlet of an air breathing engine and including: A. an inner wall member shaped to define a passageway therewithin having an inlet opening and an outlet opening adapted to be connected to an air breathing engine inlet in axial alignment, B. an outer wall member communicating with atmosphere and enveloping said inner wall member and spaced therefrom to define a chamber therebetween, C. a plurality of centrifugal separator tube members each extending between and through said wall members and having an inlet connected to said outer wall to communicate with atmosphere external of said outer wall member and also having a clean air outlet connected to said inner wall and communicating with said passageway within said inner wall member and further having a separated particle outlet into said chamber, and still further having means to apply centrifugal force to the atmospheric air between said inlet and said separated particle outlet so that material separated from the atmospheric air in passing through said centrifugal force applying means will enter said chamber and clean air will enter said passageway, D. means connecting said wall members to said separator tube members and to each other so that the only gas flow paths between said wall members is through said separator tube members, E. scavenge means connected to said chamber and applying a suction thereto to scavenge the separated material therefrom, F. and door means positioned in said inlet opening of said inner wall member and mounted and shaped to be movable between a first position to block air flow into said passageway so that all air entering said passageway must pass through said centrifugal separator tube members and a second position to permit air flow through said inlet opening and into said passageway, G. a fluid scavenge pump comprising: 1. tube means mounted in the bottom of said inner wall member and having an inlet opening into the inner wall member interior and oriented to constitute a drain therefrom and having an outlet and including: a. annular ejector defining means near the inlet of said tube means shaped to define an annular passage around said tube means and an annular ejector outlet therefrom oriented to discharge along the inner wall of said tube means toward the outlet end thereof so that fluid passed through said annular ejector defining means will create a suction to cause accumulated fluid to scavenge from said housing and through said tube means.
Claim 3
Dependent Claim
238 words
An air filter adapted to be attached to the inlet of an air breathing engine and including: A. an inner wall member shaped to define a passageway therewithin having an outlet opening adapted to be connected to an air breathing engine inlet in axial alignment, B. an outer wall member communicating with atmosphere and enveloping said inner wall member and spaced therefrom to define a chamber therebetween, C. a plurality of centrifugal separator tube members each extending between and through said wall members and having an inlet connected to said outer wall to communicate with atmosphere external of said outer wall member and also having a clean air outlet connected to said inner wall and communicating with said passageway within said inner wall member and further having a separated particle outlet into said chamber, and still further having means to apply centrifugal force to the aTmospheric air between said inlet and said separated particle outlet so that material separated from the atmospheric air in passing through said centrifugal force applying means will enter said chamber and clean air will enter said passageway, D. means connecting said wall members to said separator tube members and to each other so that the only gas flow paths between said wall members is through said separator tube members, E. scavenge means connected to said chamber and applying a suction thereto to scavenge the separated material therefrom, F. a fluid scavenge pump comprising:
Claim 4
Dependent Claim
238 words
An air filter adapted to be attached to the inlet of an air breathing engine and including: A. an inner wall member shaped to define a passageway therewithin having an outlet opening adapted to be connected to an air breathing engine inlet in axial alignment, B. an outer wall member communicating with atmosphere and enveloping said inner wall member and spaced therefrom to define a chamber therebetween, C. a plurality of centrifugal separator tube members each extending between and through said wall members and having an inlet connected to said outer wall to communicate with atmosphere external of said outer wall member and also having a clean air outlet connected to said inner wall and communicating with said passageway within said inner wall member and further having a separated particle outlet into said chamber, and still further having means to apply centrifugal force to the aTmospheric air between said inlet and said separated particle outlet so that material separated from the atmospheric air in passing through said centrifugal force applying means will enter said chamber and clean air will enter said passageway, D. means connecting said wall members to said separator tube members and to each other so that the only gas flow paths between said wall members is through said separator tube members, E. scavenge means connected to said chamber and applying a suction thereto to scavenge the separated material therefrom, F. a fluid scavenge pump comprising:
Claim 5
Dependent Claim
81 words
An engine air particle separator according to claim 2 wherein said tube means adjacent said bottom of said inner wall member is made of a material of high heat conductivity so that as heated fluid passes through said annular ejector defining means said tube means portion will be heated thereby to prevent ice formation thereagainst and so that the discharge of heated fluid from said annular ejector outlet along the inner walls of said tube means will prevent ice formation thereagainst.
Claim 6
Dependent Claim
18 words
A separator according to claim 2 wherein said annular passage is eccentric with respect to the tube means.
Claim 7
Dependent Claim
404 words
An engine inlet air particle separator comprising a closed box-like container defining a first ductway therewithin and said container having at least three sides which are formed of inner and outer spaced walls forming a second ductway therebetween, a plurality of centrifugal separator tube members each extending between and through said walls and having an inlet connected to said outer wall to communicate with atmosphere external of said outer wall member and also having a clean air outlet connected to said inner wall and communicating with said first ductway within said inner wall member and further having a separated particle outlet into said second ductway, and still further having means to apply centrifugal force to the atmospheric air between said inlet and said separated particle outlet so that material separated from the atmospheric air in passing through said centrifugal force applying means will enter said second ductway and clean air will enter said first ductway, means connecting said walls to said separator ductway, means connecting said walls to said separator tube members and to each other so that the only gas flow paths between said wall is through said separator tube members, suction means communicating with said second ductway and exhausting exterior to said container to remove separated particles from said second ductway, said container having a first opening at one end adjacent to and substantially equal in area to said engine air inlet and a second opening at the other end away from the engine air inlet, means sealing between said container first opening and said engine air inlet, bypass door means located in said second opening, and means to open said bypass door means to permit air to enter said engine air inlet through said second opening and said first ductway, and a fluid scavenge pump comprising tube means mounted in the bottom of the inner wall and having an inlet opening into said first ductway interior and oriented to constitute a drain therefrom and having an outlet and including annular ejector defining means near the inlet of said tube means shaped to define an annular passage around said tube means aNd an annular ejector outlet therefrom oriented to discharge along the inner wall of said tube means toward the outlet end thereof so that fluid passed through said annular ejector defining means will create a suction to cause accumulated fluid to scavenge from said first ductway and through said tube means.
Claim 8
Dependent Claim
404 words
An engine inlet air particle separator comprising a closed box-like container defining a first ductway therewithin and said container having at least three sides which are formed of inner and outer spaced walls forming a second ductway therebetween, a plurality of centrifugal separator tube members each extending between and through said walls and having an inlet connected to said outer wall to communicate with atmosphere external of said outer wall member and also having a clean air outlet connected to said inner wall and communicating with said first ductway within said inner wall member and further having a separated particle outlet into said second ductway, and still further having means to apply centrifugal force to the atmospheric air between said inlet and said separated particle outlet so that material separated from the atmospheric air in passing through said centrifugal force applying means will enter said second ductway and clean air will enter said first ductway, means connecting said walls to said separator ductway, means connecting said walls to said separator tube members and to each other so that the only gas flow paths between said wall is through said separator tube members, suction means communicating with said second ductway and exhausting exterior to said container to remove separated particles from said second ductway, said container having a first opening at one end adjacent to and substantially equal in area to said engine air inlet and a second opening at the other end away from the engine air inlet, means sealing between said container first opening and said engine air inlet, bypass door means located in said second opening, and means to open said bypass door means to permit air to enter said engine air inlet through said second opening and said first ductway, and a fluid scavenge pump comprising tube means mounted in the bottom of the inner wall and having an inlet opening into said first ductway interior and oriented to constitute a drain therefrom and having an outlet and including annular ejector defining means near the inlet of said tube means shaped to define an annular passage around said tube means aNd an annular ejector outlet therefrom oriented to discharge along the inner wall of said tube means toward the outlet end thereof so that fluid passed through said annular ejector defining means will create a suction to cause accumulated fluid to scavenge from said first ductway and through said tube means.
Claim 9
Dependent Claim
43 words
An engine air particle separator adapted to be connected to an inlet of an engine and having: A. wall means shaped to define a first chamber including means adapted to communicate with the engine inlet and a second chamber separated therefrom and including:
Claim 10
Dependent Claim
43 words
An engine air particle separator adapted to be connected to an inlet of an engine and having: A. wall means shaped to define a first chamber including means adapted to communicate with the engine inlet and a second chamber separated therefrom and including:
Claim 11
Dependent Claim
78 words
An engine air particle separator according to claim 6 wherein said tube means adjacent said bottom wall section is made of a material of high heat conductivity so that as heated fluid passes through said annular ejector defining means said tube means portion will be heated thereby to prevent ice formation thereagainst and so that the discharge of heated fluid from said annular ejector outlet along the inner walls of said tube means will prevent ice formation thereagainst.
Claim 12
Dependent Claim
131 words
An engine air particle separator according to claim 6 wherein said bottom wall section has an aperture therein and wherein said tube means includes: A. a first tube member having a hollow shank and an enlarged end with female threads adjacent said bottom wall section, B. a nut member having a hollow bore, a cap end, and a male threaded portion sized to cooperate with the female threads of the first tube member so that as the two members are threaded together, the enlarged end of the first member and the cap of the nut clamp onto the walls of the aperture in said lower wall section, and further including a skirt section shaped to cooperate with said flared portion of said first tube member to define the annular ejector therebetween.
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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) | 1977-05-20 | 1977-11-19 | 1978-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-20 | 1981-11-19 | 1982-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-20 | 1985-11-19 | 1986-05-21 | $7700.00 | Window Closed / Lapsed |