Patent US1636946A successfully refreshed from Google Patents.
Patent US3592213A successfully refreshed from Google Patents.
US3592213A
Expired / Lapsed
US
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Fuel flow proportioner
Assignee: HM Hobson Ltd
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Filing: 1969-11-12
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Granted: 1971-07-13
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Expires: 1989-11-12
Abstract
Abstract The invention provides a fuel flow proportioner for aircraft which comprises two fluidic vortex valves, one interposed in the flow line from one fuel tank and the other interposed in the flow line from another fuel tank, and mechanism for sensing the fuel pressures at the outlets of the two vortex valves and operative, in the event of these outlet pressures becoming unbalanced due to excess flow in one of the flow lines, to increase the control flow supplied to the vortex valve in the line having the higher outlet pressure.
Inventors
- 👤 Charles Philip Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:28
CPC Classifications
B; B64; B64D; B64D37/00; B64D37/02; B64D37/14; Y; Y10; Y10T; Y10T137/00; Y10T137/206; Y10T137/2087; Y10T137/2093; Y10T137/2496; Y10T137/2514
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
88 words
A fuel flow proportioner for aircraft which comprises two fluidic vortex valves, one interposed in the flow line from one fuel tank and the other interposed in the flow line from another fuel tank, and mechanism for sensing the fuel pressures at the outlets of the two vortex valves and operative, in the event of these outlet pressures becoming unbalanced due to excess flow in one of the flow lines, to increase the control flow supplied to the vortex valve in the line having the higher outlet pressure.
Claim 2
Dependent Claim
88 words
A fuel flow proportioner for aircraft which comprises two fluidic vortex valves, one interposed in the flow line from one fuel tank and the other interposed in the flow line from another fuel tank, and mechanism for sensing the fuel pressures at the outlets of the two vortex valves and operative, in the event of these outlet pressures becoming unbalanced due to excess flow in one of the flow lines, to increase the control flow supplied to the vortex valve in the line having the higher outlet pressure.
Claim 3
Dependent Claim
49 words
A fuel flow proportioner as claimed in claim 1, in which the sensing mechanism comprises a pressure-sensitive device exposed at opposite sides to the outlet pressures of the vortex valves and a control valve connected to the pressure-sensitive device and controlling the control pressures applied to the vortex valves.
Claim 4
Dependent Claim
68 words
A fuel flow proportioner as claimed in claim 1, in which the sensing mechanism comprises a pair of interconnected proportional fluid amplifiers, each associated with one of the flow lines and having an inlet connected to that flow line upstream of the vortex valve therein, a control port connected to that flow line downstream of the vortex valve and an outlet providing control pressure for the vortex valve.
Claim 5
Dependent Claim
40 words
A fuel flow proportioner as claimed in claim 1, in which the outlet pressure applied to the sensing mechanism are derived from points in the flow lines between the outlets of the vortex valves and restrictors in the flow lines.
Claim 6
Dependent Claim
38 words
A fuel flow proportioner as claimed in claim 1, in which the outlet pressures applied to the sensing mechanism are derived from the throats of venturis in the flow lines which are situated downstream of the vortex valves.
References Cited (Backward Citations)
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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) | 1974-07-12 | 1975-01-11 | 1975-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-12 | 1979-01-11 | 1979-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-12 | 1983-01-11 | 1983-07-13 | $7700.00 | Window Closed / Lapsed |