US4718273A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination alpha, static and total pressure probe
Assignee: Honeywell International Inc
•
Filing: 1985-12-31
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Granted: 1988-01-12
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Expires: 2005-12-31
Abstract
Abstract An air data sensor probe for providing measurements of total pressure, static pressure and angle-of-attack for an aircraft in flight. The probe is essentially cylindrical with a hemispherical nose. It has a vertically elongated central opening for measurement of total pressure and a plurality of off-axis openings, manifolded by pairs, to measure angle-of-attack. Static pressure is measured by a plurality of ports mounted back from the nose, manifolded together to provide the static pressure reading.
Inventors
- 👤 William H. McCormack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:05
CPC Classifications
G; G01; G01P; G01P13/00; G01P13/02; G01L; G01L19/00; G01L19/0007; G01P5/00; G01P5/14; G01P5/16; G01P5/165
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
146 words
An air data sensor probe for installation on an aircraft comprising: a generally cylindrical barrel portion and a rounded nose portion having an exterior wall closing the forward end of the barrel portion, the probe having a central longitudinal axis; a first opening in the wall of said nose portion, facing generally forward for measuring total pressure, said opening being elongated in a preferred direction which is generally transverse to the central longitudinal axis; a plurality of off-axis second openings in said nose portion wall, displaced from said first opening, said second openings being interconnected by pairs for sensing pressure which are indicative of angle of attack; at least one additional opening mounted in said barrel portion rearward of said nose portion for measuring static pressure; and a plurality of conduits coupled to the respective openings for directing the measured pressure signals to a remote location.
Claim 2
Dependent Claim
146 words
An air data sensor probe for installation on an aircraft comprising: a generally cylindrical barrel portion and a rounded nose portion having an exterior wall closing the forward end of the barrel portion, the probe having a central longitudinal axis; a first opening in the wall of said nose portion, facing generally forward for measuring total pressure, said opening being elongated in a preferred direction which is generally transverse to the central longitudinal axis; a plurality of off-axis second openings in said nose portion wall, displaced from said first opening, said second openings being interconnected by pairs for sensing pressure which are indicative of angle of attack; at least one additional opening mounted in said barrel portion rearward of said nose portion for measuring static pressure; and a plurality of conduits coupled to the respective openings for directing the measured pressure signals to a remote location.
Claim 3
Dependent Claim
29 words
The apparatus of claim 1 wherein the first opening is elongated in the direction of a vertical plane through said longitudinal axis and is generally fan-shaped in vertical section.
Claim 4
Dependent Claim
35 words
The apparatus of claim 2 wherein the upper and lower boundary walls of said first opening terminate in a central chamber which is coupled to one of said conduits extending along said central longitudinal axis.
Claim 5
Dependent Claim
31 words
The apparatus of claim 3 wherien the side walls of said first opening are non-parallel and are spaced more closely together than the upper and lower boundary walls of said opening.
Claim 6
Dependent Claim
16 words
The apparatus of claim 4 wherein said non-parallel sidewalls converge with distance from said first opening.
Claim 7
Dependent Claim
17 words
The apparatus of claim 1 wherein the first opening is located centrally about said central longitudinal axis.
Claim 8
Dependent Claim
23 words
The apparatus of claim 6 wherein the second openings are symmetrically displaced about the nose portion and are separate from said first opening.
Claim 9
Dependent Claim
36 words
The apparatus of claim 7 wherien said second openings are manifolded together by pairs, said openings above the horizontal central plane being manifolded together in a pair displaced from a vertical plane through said longitudinal axis.
Claim 10
Dependent Claim
16 words
The apparatus of claim 8 wherein each pair of second openings straddles said vertical longitudinal plane.
Claim 11
Dependent Claim
45 words
The apparatus of claim 9 wherein the second openings comprise an upper pair straddling the vertical central longitudinal plane and situated above the central horizontal plane and further comprise a lower pair straddling the vertical central longitudinal plane and situated below the central horizontal plane.
Claim 12
Dependent Claim
20 words
The apparatus of claim 1 wherein the first and second openings are asymmetrically located relative to said central longitudinal axis.
Claim 13
Dependent Claim
25 words
The apparatus of claim 11 wherein the axis of symmetry of the first and second openings is angled downwardly relative to the central longitudinal axis.
Claim 14
Dependent Claim
21 words
The apparatus of claim 11 wherein said axis of symmetry is angled downwardly approximately 20° relative to said central longitudinal axis.
Claim 15
Dependent Claim
44 words
The apparatus of claim 1 comprising a plurality of third openings spaced symmetrically about the barrel portion of the probe in a transverse plane situated rearward from said nose portion, said third openings being manifolded together to provide a single measurement of static pressure.
Claim 16
Dependent Claim
19 words
The apparatus of claim 1 wherein the exterior surface of said nose portion is generally rounded and smoothly curved.
Claim 17
Dependent Claim
17 words
The apparatus of claim 15 wherein the exterior surface of the mose portion is hemispherical in shape.
Claim 18
Dependent Claim
26 words
The apparatus of claim 1 further including a mounting strut attached near the rear of the cylindrical barrel portion for mounting the probe on the aircraft.
Claim 19
Dependent Claim
23 words
The apparatus of claim 17 wherein said strut is adapted to mount the probe to a side of the fuselage of the aircraft.
Claim 20
Independent Claim
127 words
The method of taking air data measurements for an aircraft in flight comprising the steps of: using an elongated central opening at the forward end of a generally cylindrical probe housing to develop a total pressure measurement, which central opening is elongated in a direction which is generally transverse to the central longitudinal axis of the cylindrical probe housing; utilizing a first pair of off-axis forward openings mounted to either side of said elongated central opening above a central horizontal plane through the central longitudinal axis of the probe to provide a first measurement of angle of attack; and utilizing a plurality of side openings mounted about the cylindrical housing of the probe at a position to the rear of the forward end for measuring static pressure.
Claim 21
Independent Claim
127 words
The method of taking air data measurements for an aircraft in flight comprising the steps of: using an elongated central opening at the forward end of a generally cylindrical probe housing to develop a total pressure measurement, which central opening is elongated in a direction which is generally transverse to the central longitudinal axis of the cylindrical probe housing; utilizing a first pair of off-axis forward openings mounted to either side of said elongated central opening above a central horizontal plane through the central longitudinal axis of the probe to provide a first measurement of angle of attack; and utilizing a plurality of side openings mounted about the cylindrical housing of the probe at a position to the rear of the forward end for measuring static pressure.
Claim 22
Dependent Claim
42 words
The method of claim 19 further including utilizing a second pair of off-axis forward openings mounted to either side of said elongated central opening below the central horizontal plane through the central axis to provide a second measurement of angle of attack.
Claim 23
Dependent Claim
29 words
The method of claim 20 wherein the elongated central opening is elongated in the vertical direction and wherein the sides of said opening are non-parallel and relatively close toegether.
Claim 24
Dependent Claim
26 words
The method of claim 21 wherein the off-axis forward openings are generally equally spaced about the central longitudinal axis and are displaced from said central opening.
Claim 25
Dependent Claim
21 words
The method of claim 21 wherein the off-axis forward openings straddle the elongated central opening and are manifolded together by pairs.
Claim 26
Dependent Claim
23 words
The method of claim 21 wherein the elongated central opening is situated symmetrically about the longitudinal axis of the generally cylindrical probe housing.
Claim 27
Dependent Claim
24 words
The method of claim 21 wherein the elongated central opening is asymmetrically located relative to the longitudinal axis of the generally cylindrical probe housing.
Claim 28
Dependent Claim
28 words
The method of claim 25 wherein the axis of symmetry of the elongated central opening is angled downwardly relative to the longitudinal axis of the generally cylindrical housing.
Claim 29
Dependent Claim
20 words
The method of claim 26 wherein said axis of symmetry is angled downwardly approximately 20° relative to said longitudinal axis.
References Cited (Backward Citations)
US1869962A
Cited
DE692496C
Cited
US2660056A
Cited
US2725746A
Cited
US2923152A
Cited
US2876640A
Cited
US3043142A
Cited
US2971375A
Cited
US3029639A
Cited
US3079758A
Cited
GB908572A
Cited
US3244001A
Cited
US3120123A
Cited
US3228247A
Cited
US3318146A
Cited
US3585859A
Cited
US3673866A
Cited
US3914997A
Cited
US4096744A
Cited
US4182188A
Cited
US4230290A
Cited
US4378696A
Cited
US4378697A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-01-11 | 1991-07-13 | 1992-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-01-11 | 1995-07-13 | 1996-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-01-11 | 1999-07-13 | 2000-01-12 | $7700.00 | Window Closed / Lapsed |