Patent CA746669A successfully refreshed from Google Patents.
Patent US4403872A successfully refreshed from Google Patents.
US4403872A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flow device for sensors
Assignee: Rosemount Inc
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Filing: 1982-11-03
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Granted: 1983-09-13
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Expires: 2002-11-03
Abstract
Abstract A device for measuring a parameter such as temperature, humidity, or the like in a fluid stream having a leading portion and a trailing portion forming an elongated longitudinal housing with a bore extending longitudinally through the portions for flow therethrough. The flow rate is internally regulated to a desired rate by a restriction in the bore located in the trailing portion. Where the fluid stream is air, the restriction provides for internal Mach number regulation at various flow rates. A first plurality of ports is located in the leading portion for boundary layer control. The device has one or more annular fluid passageways downstream of the first ports coupled to the bore and ported to the exterior to cooperate with the bore to provide a lower pressure area for flow therethrough, and a sensor disposed in at least one such passageway. The leading portion may incorporate anti-icing for air stream measurement. For temperature sensors, radiation shielding is provided.
Inventors
- 👤 Richard V. DeLeo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:17
CPC Classifications
G; G01; G01K; G01K13/00; G01K13/02; G01K13/028; G01K7/00; G01K7/16; G01K7/18
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
181 words
A device for measuring a parameter in a fluid stream comprising a housing having an exterior and having: an elongated longitudinal exterior shape and a bore defined in the housing along the shape for flow of the fluid stream therethrough; a leading portion at a first end of the bore; a trailing portion at a second end of the bore; the exterior shape being contoured convex at the leading portion; restriction means in the bore for internal flow regulation; first plurality of port means from the bore to the exterior of the housing in the leading portion for providing boundary layer control; first annular fluid passageway means in the housing downstream of the first port means outboard of the bore and coupled to the bore upstream of the restriction means and ported to the exterior to cooperate with the bore to provide a lower pressure area for the fluid which flows into the first passageway means; and sensor means to measure the parameter supported in the first passageway means between the coupling to the bore and the porting to the exterior.
Claim 2
Independent Claim
181 words
A device for measuring a parameter in a fluid stream comprising a housing having an exterior and having: an elongated longitudinal exterior shape and a bore defined in the housing along the shape for flow of the fluid stream therethrough; a leading portion at a first end of the bore; a trailing portion at a second end of the bore; the exterior shape being contoured convex at the leading portion; restriction means in the bore for internal flow regulation; first plurality of port means from the bore to the exterior of the housing in the leading portion for providing boundary layer control; first annular fluid passageway means in the housing downstream of the first port means outboard of the bore and coupled to the bore upstream of the restriction means and ported to the exterior to cooperate with the bore to provide a lower pressure area for the fluid which flows into the first passageway means; and sensor means to measure the parameter supported in the first passageway means between the coupling to the bore and the porting to the exterior.
Claim 3
Dependent Claim
57 words
Apparatus according to claim 1 further comprising a second annular passageway means formed in the housing outwardly of the first passageway means coupled to the bore and to the first passageway means and ported to the exterior to enhance flow to the sensor, which flow has parameters substantially similar to the fluid stream in an undisturbed state.
Claim 4
Dependent Claim
21 words
Apparatus according to claim 2 wherein the restriction is of size to regulate internal flow rate to less than Mach 0.5.
Claim 5
Dependent Claim
19 words
Apparatus according to claim 2 wherein the restriction is of size to regulate internal flow rate to Mach 0.35.
Claim 6
Dependent Claim
16 words
Apparatus according to claim 2 wherein the leading portion of the housing has a blunt nose.
Claim 7
Dependent Claim
15 words
Apparatus according to claim 2 wherein the leading portion further comprises heating means for anti-icing.
Claim 8
Dependent Claim
26 words
Apparatus according to claim 2 wherein the wall forming the second passageway means is selected from a material to provide radiation shielding for the sensor means.
Claim 9
Dependent Claim
59 words
Apparatus according to claim 2 wherein a portion of the bore and restriction means are defined by a receiver wall extending from the restriction means upstream to the coupling of the first annular fluid passageway means, the receiver wall thermally coupled to receiver heater means, the receiver heater means for providing anti-icing the full extent of the receiver wall.
Claim 10
Dependent Claim
46 words
Apparatus according to claim 8 having the receiver wall constructed of a thermally conductive material, the thermal conductivity of the receiver wall acting in cooperation with the receiver heater means to conduct sufficient heat to provide the anti-ice function the full extent of the receiver wall.
Claim 11
Dependent Claim
26 words
Apparatus according to claim 2 wherein the receiver wall defines a bore that gradually tapers down in size, providing a smooth transition to the restriction means.
Claim 12
Dependent Claim
46 words
Apparatus according to claim 2 wherein the restriction means is of size to regulate internal flow Mach number in the bore between 0.025 to 0.1 where the bore is defined by the upstream portion of the receiver wall when flow in the restriction means is sonic.
Claim 13
Dependent Claim
187 words
An air data sensing device comprising: inlet means to provide for air flow to enter the device; outlet means coupled to the inlet means to provide for air flow to exhaust from the device; central passageway means in the inlet means and the outlet means for air flow therethrough; the outlet means further having means defining a flow restriction in the central passageway means to regulate the Mach number of the flow therethrough; first port means in the device open to the central passageway means and oriented to radially exhaust flow from the central passageway for Boundary Layer Control; first annular fluid flow passageway means in the device connected to the central passageway means downstream of the first port means, and exhausting fluid from the device for providing air flow having substantially free stream air characteristics; second annular fluid passageway means in said device outwardly of and fluidly coupled to the first annular passageway means and to the central passageway means and exhausting fluid from the device to further enhance Boundary Layer Control; sensor means annularly disposed in the first annular passageway means to measure the parameter.
Claim 14
Dependent Claim
187 words
An air data sensing device comprising: inlet means to provide for air flow to enter the device; outlet means coupled to the inlet means to provide for air flow to exhaust from the device; central passageway means in the inlet means and the outlet means for air flow therethrough; the outlet means further having means defining a flow restriction in the central passageway means to regulate the Mach number of the flow therethrough; first port means in the device open to the central passageway means and oriented to radially exhaust flow from the central passageway for Boundary Layer Control; first annular fluid flow passageway means in the device connected to the central passageway means downstream of the first port means, and exhausting fluid from the device for providing air flow having substantially free stream air characteristics; second annular fluid passageway means in said device outwardly of and fluidly coupled to the first annular passageway means and to the central passageway means and exhausting fluid from the device to further enhance Boundary Layer Control; sensor means annularly disposed in the first annular passageway means to measure the parameter.
Claim 15
Dependent Claim
23 words
Apparatus according to claim 12 wherein the inlet means further comprises a relatively blunt nose on the flow face of this inlet means.
Claim 16
Dependent Claim
15 words
Apparatus according to claim 12 wherein the inlet means further comprises heater means for anti-icing.
Claim 17
Dependent Claim
13 words
Apparatus according to claim 12 wherein the restriction means regulates the Mach number.
Claim 18
Dependent Claim
19 words
Apparatus according to claim 12 wherein the restriction means regulates the Mach number to between 0.1 and 0.5 Mach.
Claim 19
Dependent Claim
16 words
Apparatus according to claim 12 wherein the restriction means regulates the Mach number to 0.35 Mach.
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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) | 1986-09-12 | 1987-03-14 | 1987-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-09-12 | 1991-03-14 | 1991-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-09-12 | 1995-03-14 | 1995-09-13 | $7700.00 | Window Closed / Lapsed |