US3749336A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aircraft anti-icing apparatus
Assignee: Midland Ross Corp
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Filing: 1972-03-10
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Granted: 1973-07-31
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Expires: 1992-03-10
Abstract
Abstract Anti-icing/de-icing apparatus for use in aircraft, comprising apertured fairings constructed from aluminum or alloys thereof defining air spaces therewithin, and means for delivering temperature controlled warm air under pressure to said air spaces, which means includes a conduit for conveying engine bleed air to said air spaces, an inlet to the conduit for cool ambient air to be mixed with the relatively warm engine bleed air, an anti-icing valve interposed in the conduit between the engine bleed air intake and the ambient air inlet and control means for regulating the valve to maintain the pressure and temperature of the air delivered to the air spaces below predetermined nominal values, said control means including pressure-responsive means and manually-controlled electrical means for overriding the pressure-responsive means. Additionally, the present invention contemplates an emergency relief valve disposed in the conduit downstream of the ambient air inlet and adapted to open in the event that the pressure or temperature of the air passing thereby is of greater than a predetermined maximum value.
Inventors
- 👤 E Christensen
- 👤 R Schilling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:56
CPC Classifications
F; F02; F02C; F02C7/00; F02C7/04; F02C7/047; B; B64; B64D; B64D15/00; B64D15/02; B64D33/00; B64D33/02; B64D2033/0233; Y; Y02; Y02T; Y02T50/00; Y02T50/60
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
183 words
Anti-icing apparatus for use in aircraft, comprising: apertured fairing means constructed from relatively light-weight materials, said fairing means defining air distribution spaces therewithin, conduit means including first inlet means communicating with the aircraft engine for passage of engine bleed air there-through, second inlet means disposed downstream of selectively operable valve means and communicating with an exterior surface of the aircraft for passage of ambient air therethrough, and outlet means communicating with said air distribution spaces for delivery of air thereto, said selectively-operable valve means being disposed within said conduit means between said first inlet means and said second inlet means, control means responsive to the pressure within said conduit means upstream of said second inlet means and including actuating means for actuating said valve means to selectively restrict the flow of said engine bleed air in response to the pressure within said conduit means upstream of said valve means, and emergency relief valve means disposed in said conduit means donwstream of said second inlet means for preventing air flow to said air distribution spaces at pressure levels in excess of predetermined maximum levels.
Claim 2
Dependent Claim
183 words
Anti-icing apparatus for use in aircraft, comprising: apertured fairing means constructed from relatively light-weight materials, said fairing means defining air distribution spaces therewithin, conduit means including first inlet means communicating with the aircraft engine for passage of engine bleed air there-through, second inlet means disposed downstream of selectively operable valve means and communicating with an exterior surface of the aircraft for passage of ambient air therethrough, and outlet means communicating with said air distribution spaces for delivery of air thereto, said selectively-operable valve means being disposed within said conduit means between said first inlet means and said second inlet means, control means responsive to the pressure within said conduit means upstream of said second inlet means and including actuating means for actuating said valve means to selectively restrict the flow of said engine bleed air in response to the pressure within said conduit means upstream of said valve means, and emergency relief valve means disposed in said conduit means donwstream of said second inlet means for preventing air flow to said air distribution spaces at pressure levels in excess of predetermined maximum levels.
Claim 3
Dependent Claim
32 words
Anti-icing apparatus according to claim 1, wherein said emergency relief valve means is disposed between said second inlet means and said outlet means, said relief valve means being of the normally-closed type.
Claim 4
Dependent Claim
32 words
Anti-icing apparatus according to claim 2, wherein said emergency relief valve means includes means for locking said valve means in the open position thereby indicating the open position of said valve means.
Claim 5
Dependent Claim
189 words
Anti-icing apparatus for use in aircraft, comprising: apertured fairing means constructed from relatively light-weight materials, said fairing means defining air distribution spaces therewithin, conduit means including first inlet means communicating with the aircraft engine for passage of engine bleed air therethrough, second inlet means disposed downstream of selectively operable valve means and communicating with an exterior surface of the aircraft for passage of ambient air therethrough, and outlet means communicating with said air distribution spaces for delivery of air thereto, said selectively-operable valve means being disposed within said conduit means between said first inlet means and said second inlet means, control means responsive to the pressure within said conduit means upstream of said second inlet means and including actuating means for actuating said valve means to selectively restrict the flow of said engine bleed air in response to the pressure within said conduit means upstream of said valve means, and wherein said control means further includes selectively energizable solenoid valve means, said solenoid valve means being operable, when energized, to cause said actuating means to actuate said first-mentioned valve means to restrict the flow of said engine bleed air.
Claim 6
Dependent Claim
189 words
Anti-icing apparatus for use in aircraft, comprising: apertured fairing means constructed from relatively light-weight materials, said fairing means defining air distribution spaces therewithin, conduit means including first inlet means communicating with the aircraft engine for passage of engine bleed air therethrough, second inlet means disposed downstream of selectively operable valve means and communicating with an exterior surface of the aircraft for passage of ambient air therethrough, and outlet means communicating with said air distribution spaces for delivery of air thereto, said selectively-operable valve means being disposed within said conduit means between said first inlet means and said second inlet means, control means responsive to the pressure within said conduit means upstream of said second inlet means and including actuating means for actuating said valve means to selectively restrict the flow of said engine bleed air in response to the pressure within said conduit means upstream of said valve means, and wherein said control means further includes selectively energizable solenoid valve means, said solenoid valve means being operable, when energized, to cause said actuating means to actuate said first-mentioned valve means to restrict the flow of said engine bleed air.
Claim 7
Dependent Claim
43 words
Anti-icing apparatus according to claim 4, further comprising emergency relief valve means disposed in said conduit means downstream of said second inlet means for preventing air flow to said air distribution spaces at temperature and pressure levels in excess of predetermined maximum levels.
Claim 8
Dependent Claim
216 words
Anti-icing apparatus for use in aircraft, comprising: apertured fairing means constructed from relatively light-weight materials, said fairing means defining air distribution spaces therewithin, conduit means including first inlet means communicating with the aircraft engine for passage of engine bleed air therethrough, second inlet means disposed downstream of selectively operable valve means and communicating with an exterior surface of the aircraft for passage of ambient air therethrough, and outlet means communicating with said air distribution spaces for delivery of air thereto, said selectively-operable valve means being disposed within said conduit means between said first inlet means and said second inlet means, control means responsive to the pressure within said conduit means upstream of said second inlet means and including actuating means for actuating said valve means to selectively restrict the flow of said engine bleed air in response to the pressure within said conduit means upstream of said valve means, and wherein said control means further includes pressure-responsive valve means operable to communicate a pressure signal to said actuating means to cause same to actuate said first-mentioned valve means to restrict the flow of engine bleed air when the pressure sensed within said conduit means at a point between said valve means and said second inlet means reaches a level in excess of a predetermined nominal value.
Claim 9
Dependent Claim
216 words
Anti-icing apparatus for use in aircraft, comprising: apertured fairing means constructed from relatively light-weight materials, said fairing means defining air distribution spaces therewithin, conduit means including first inlet means communicating with the aircraft engine for passage of engine bleed air therethrough, second inlet means disposed downstream of selectively operable valve means and communicating with an exterior surface of the aircraft for passage of ambient air therethrough, and outlet means communicating with said air distribution spaces for delivery of air thereto, said selectively-operable valve means being disposed within said conduit means between said first inlet means and said second inlet means, control means responsive to the pressure within said conduit means upstream of said second inlet means and including actuating means for actuating said valve means to selectively restrict the flow of said engine bleed air in response to the pressure within said conduit means upstream of said valve means, and wherein said control means further includes pressure-responsive valve means operable to communicate a pressure signal to said actuating means to cause same to actuate said first-mentioned valve means to restrict the flow of engine bleed air when the pressure sensed within said conduit means at a point between said valve means and said second inlet means reaches a level in excess of a predetermined nominal value.
Claim 10
Dependent Claim
52 words
Anti-icing apparatus according to claim 6, wherein said pressure-responsive valve means includes diaphragm meanS exposed, on one side thereof, to the sensed pressure in said conduit means between said first-mentioned valve means and said second inlet means and, on the other side, to a spring means exerting a force of predetermined magnitude.
Claim 11
Dependent Claim
78 words
Anti-icing apparatus according to claim 7, wherein said actuating means includes a diaphragm means exposed, on one side thereof, to a pressure signal selectively transmitted by said pressure-responsive valve means and, on the other side thereof, to a spring means exerting a force of a predetermined magnitude, which force tends to cause said first-mentioned valve means to permit free flow of engine bleed air in the absence of an opposed balancing pressure signal exerted upon said diaphragm means.
Claim 12
Dependent Claim
82 words
Anti-icing apparatus according to claim 8, wherein said control means further includes pressure channel means operatively connecting said conduit means, at a point upstream of said first-mentioned valve means, with one side of said diaphragm means of said actuating means, said pressure-responsive valve means being operable to selectively block said pressure channel means when said sensed pressure in said conduit means at a point between said valve means and said second inlet means is of lesser magnitude than said predetermined nominal value.
Claim 13
Dependent Claim
76 words
Anti-icing apparatus according to claim 9, wherein said control means further includes selectively energizable solenoid valve means operable, when de-energized, to block parallel pressure channel means operatively connecting said conduit means, at a point upstream of said first-mentioned valve means, with said one side of said diaphragm means of said actuating means and to open said parallel pressure channel means when said solenoid valve means is energized, irrespective of the condition of said pressure-responsive valve means.
Claim 14
Dependent Claim
18 words
Anti-icing apparatus according to claim 10, wherein said apertured fairing means are constructed from aluminum or alloys thereof.
Claim 15
Dependent Claim
72 words
Anti-icing apparatus according to claim 10, further comprising emergency relief valve means disposed between said conduit means, at a point downstream of said second inlet means, and said outlet means, said relief valve means being normally-closed, but operable to open when the air flow thereby is at pressure levels in excess of predetermined maximum values, thus precluding air flow to said air distribution spaces which might be destructive of said fairing means.
Claim 16
Dependent Claim
32 words
Anti-icing apparatus according to claim 12, wherein said emergency relief valve means includes means for locking said valve means in the open position thereby indicating the open position of said valve means.
References Cited (Backward Citations)
US3058695A
Cited
US3258229A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-30 | 1977-01-29 | 1977-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-30 | 1981-01-29 | 1981-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-30 | 1985-01-29 | 1985-07-31 | $7700.00 | Window Closed / Lapsed |