US4573802A
Expired / Lapsed
US
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Deicing method and apparatus
Assignee: FJ KERRIGAN PLUMBING Co A DE CORP
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Filing: 1983-11-17
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Granted: 1986-03-04
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Expires: 2003-11-17
Abstract
Abstract A method and apparatus for deicing aircraft includes a monitoring system for monitoring water and deicing fluid flow and circuitry for setting a predetermined mixture and comparing the water and fluid flow to automatically shut down the system when either flow is outside the setting.
Inventors
- 👤 Jerome J. Kerrigan
- 👤 Gregory E. Domanowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:18
CPC Classifications
G; G05; G05D; G05D11/00; G05D11/02; B; B01; B01F; B01F35/00; B01F35/20; B64; B64F; B64F5/00; B64F5/20; B64F5/23; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2514; Y10T137/2521; Y10T137/2529
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
151 words
Control circuitry including interlocking means for indicating a fault condition of the flow of a specific fluid, and a fluidic system adapted to selectively provide a first-fluid-only flow and a first- and second-fluid mixture-flow at desired output ports, said control circuitry comprising in combination, a system flow fault relay, a first fluid fault relay and a second fluid flow fault relay, each of said relays including a coil and indicating means, movable contacts, the coil of said system low fault relay being connected to contacts of said other two relay coils to be energized when the coil of either of said other two contacts is energized in response to a respective fluid flow fault, and each of said other two relay coils being connected respectively to be de-energized when the second of said other relay coils is energized to thereby allow only one indicating means to be energized at a time.
Claim 2
Dependent Claim
151 words
Control circuitry including interlocking means for indicating a fault condition of the flow of a specific fluid, and a fluidic system adapted to selectively provide a first-fluid-only flow and a first- and second-fluid mixture-flow at desired output ports, said control circuitry comprising in combination, a system flow fault relay, a first fluid fault relay and a second fluid flow fault relay, each of said relays including a coil and indicating means, movable contacts, the coil of said system low fault relay being connected to contacts of said other two relay coils to be energized when the coil of either of said other two contacts is energized in response to a respective fluid flow fault, and each of said other two relay coils being connected respectively to be de-energized when the second of said other relay coils is energized to thereby allow only one indicating means to be energized at a time.
Claim 3
Dependent Claim
223 words
Control circuitry including interlock means for indicating a fault condition of the flow of a specific fluid, and a fluidic system adapted to selectively provide a water-only flow and a water-and-deicing fluid mixture flow at desired output ports, said control circuitry comprising in combination, a flow fault relay, a water-flow fault relay and a deicing fluid-flow fault relay, each of said relays including coils and selectively operable and closeable contacts indicating means connected to be activated in response to energization of said coils, selected, normally open contacts of said water-flow fault relay and said deicing fluid-flow fault relay being connected in parallel with one another and in series with the coil of said flow fault relay, selected, normally closed contacts of said deicing fluid-flow fault relay contacted in series with the water-flow fault relay and selected, normally closed contacts of said water-flow fault relay connected in series with the deicing fluid-fault relay, whereby when a water-flow fault occurs, the water-flow fault relay coil is energized, thereby activating its associated indicating means, and closing its associated normally open contacts in series with the flow fault relay to energize said flow fault relay and opening its associated, normally closed contacts in series with said deicing fluid-flow fault relay coil, whereby said deicing fluid-flow fault relay cannot be energized until said water-flow fault relay is de-energized.
Claim 4
Dependent Claim
223 words
Control circuitry including interlock means for indicating a fault condition of the flow of a specific fluid, and a fluidic system adapted to selectively provide a water-only flow and a water-and-deicing fluid mixture flow at desired output ports, said control circuitry comprising in combination, a flow fault relay, a water-flow fault relay and a deicing fluid-flow fault relay, each of said relays including coils and selectively operable and closeable contacts indicating means connected to be activated in response to energization of said coils, selected, normally open contacts of said water-flow fault relay and said deicing fluid-flow fault relay being connected in parallel with one another and in series with the coil of said flow fault relay, selected, normally closed contacts of said deicing fluid-flow fault relay contacted in series with the water-flow fault relay and selected, normally closed contacts of said water-flow fault relay connected in series with the deicing fluid-fault relay, whereby when a water-flow fault occurs, the water-flow fault relay coil is energized, thereby activating its associated indicating means, and closing its associated normally open contacts in series with the flow fault relay to energize said flow fault relay and opening its associated, normally closed contacts in series with said deicing fluid-flow fault relay coil, whereby said deicing fluid-flow fault relay cannot be energized until said water-flow fault relay is de-energized.
Claim 5
Dependent Claim
76 words
Control circuitry as in claim 2 whereby when a deicing fluid fault occurs, the deicing fluid-flow fault relay coil is energized, thereby activating its associated indicating means, closing its associated, normally open contact in series with the flow fault relay to energize said flow fault relays and opening its associated, normally closed contacts in series with said water-flow fault relay coil whereby said water-flow fault relay cannot be energized until said deicing fluid-fault relay is de-energized.
Claim 6
Dependent Claim
20 words
Control circuitry as in claim 2, including manual control means for resetting said relays to an initial or normal condition.
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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) | 1989-03-03 | 1989-09-02 | 1990-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-03 | 1993-09-02 | 1994-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-03 | 1997-09-02 | 1998-03-04 | $7700.00 | Window Closed / Lapsed |