A pitot pressure sensing probe assembly is made up of individual components comprising a barrel formed with a longitudinal interior passageway and a conical end cap at its leading end. A strut that has stamped or formed sections secured together to form the strut with a compound curvature includes a
A pitot pressure sensing probe assembly is made up of individual components comprising a barrel formed with a longitudinal interior passageway and a conical end cap at its leading end. A strut that has stamped or formed sections secured together to form the strut with a compound curvature includes a neck that has a bore to receive a hub of the barrel. The end cap has a pitot port for sensing fluid pressure. The barrel includes a water trap at its leading end for trapping water and permitting it to drain through a hole in the conical end cap. The longitudinal internal passageyway carries the fluid pressure sensed by the pitot port to remote instruments. The individual components are easily formed and are secured together to make the pitot pressure sensing probe assembly.
대표청구항▼
1. A pitot pressure sensing probe assembly comprising a pitot pressure sensing barrel having a pitot pressure sensing port at a leading end thereof, a trailing end of the barrel adapted for mounting on a support, the barrel having an internal longitudinal passage, the leading end of the barrel havin
1. A pitot pressure sensing probe assembly comprising a pitot pressure sensing barrel having a pitot pressure sensing port at a leading end thereof, a trailing end of the barrel adapted for mounting on a support, the barrel having an internal longitudinal passage, the leading end of the barrel having an opening to the passageway, and a cap member formed as a separate part surrounding the leading end of the barrel and tapering to a smaller size in a direction away from the trailing end of the barrel to form a pitot pressure sensing port centered on a longitudinal axis of the barrel, the cap member defining a lead in passageway from the port to the longitudinal passageway.2. The pitot probe of claim 1, wherein the cap member is in the shape of a cone and has a cylindrical bore at an end portion opposite from the pitot pressure sensing port, the leading end of the barrel having a cylindrical hub that is inserted into the cylindrical bore of the cone shaped cap member.3. The pitot probe of claim 2 wherein said leading end of the barrel has at least a part annular recess spaced toward the pitot pressure sensing port from the hub, said internal longitudinally extending passageway opening to the at least part annular recess, and said cap member having an internal conical surface forming the lead in passageway from the pitot pressure port to the recess, whereby pressure at the pitot pressure sensing port is exerted at the recess and in the internal longitudinally extending passageway of the barrel.4. The pitot probe of claim 3 wherein said leading end of the barrel has a conical outer surface spaced from and extending along the internal conical surface of the cap member to form the lead in passageway.5. A multi-component strut mounted pitot tube assembly comprising a strut, a barrel supported on the strut and having a pressure sensing opening at a first leading end, the strut having an end bore forming a receptacle for receiving a second trailing end portion of the barrel, and the barrel having a reduced diameter neck portion at the second trailing end fitted into the receptacle and being secured to the strut.6. The pitot tube assembly of claim 5, wherein the barrel has a central longitudinal axis, and wherein said strut is made up of two metal sections formed to have a generally airfoil shaped exterior cross section configuration and a hollow interior, and the sections being fixedly joined at mating edges along a bisecting plane between the strut sections, the bisecting plane lying along the barrel central longitudinal axis.7. The pitot tube assembly of claim 6, wherein said barrel reduced diameter neck portion comprises a reduced end shank, said strut having an end portion forming the receptacle and fitting over said shank, and the strut end portion being substantially flush around an outer surface of a main portion of the barrel when the strut end portion is fitted around said shank with the shank in the receptacle.8. The pitot tube assembly of claim 5, wherein there is a separate leading end component comprising a tubular cap secured to the first leading end of the barrel, opposite from the barrel portion fitted into the receptacle, said tubular cap having a conical outer surface leading end forming a pressure port extending in an upstream direction, and a bore at its opposite end, the barrel having a hub received in the bore at a trailing end of the tubular cap, the barrel first leading end having an end portion with an end surface aligned with the pressure port, the end portion being spaced from an interior surface of the tubular cap to form a passageway open to the pressure port, the pressure sensing opening at the first leading end of the barrel comprising an annular groove spaced from the end surface and surrounded by the trailing end of the tubular cap, the passageway being open to the annular groove, and the pressure sensing opening at the first leading end of the barrel further comprising a longitudinal bore in the barrel for carrying fluid pressure from the annular groove to a remote location.9. The pitot tube assembly of claim 8, wherein there is a recess formed between the end portion of the barrel and the tubular cap on a lower side of the pitot tube assembly for collecting liquid entering the pressure port, and a drain hole in the tubular cap opening to the recess.10. The pitot tube assembly of claim 8, wherein said barrel has a second bore extending longitudinally and separate from the longitudinal bore for carrying fluid pressure, said second bore being of size to receive heater for heating the barrel.11. The pitot tube assembly of claim 8, wherein the barrel end portion has a generally conical outer surface, said tubular cap having a conical inner surface spaced from and extending along the conical outer surface of the end portion of the barrel to define the passageway.12. A pitot pressure sensing probe assembly comprising a pitot pressure sensing barrel having a pitot pressure sensing port at a leading end thereof, a trailing end of the barrel having a reduced diameter shank, a strut having a base end, and a barrel receiving end, said barrel receiving end comprising a bore of size to receive the shank for fixedly mounting the shank on the strut, the barrel having a longitudinal axis, and the strut curving away from the axis to the base end.13. The pitot probe of claim 12, wherein said strut is formed of two mirror image strut sections and wherein each of the strut sections terminates at edges spaced along a bisecting plane of the strut, said edges being secured to edges of the other strut section to form the strut to hold the shank of the barrel.14. The pitot probe of claim 1, wherein the barrel has an internal longitudinal passage and the leading end of the barrel has an opening to the passageway, and a cap member surrounding the leading end of the barrel tapering toward the longitudinal axis in a direction away from the trailing end of the barrel to form a pitot pressure sensing port centered on the longitudinal axis of the barrel.15. The pitot probe of claim 1, wherein the leading end of the barrel has an at least partially annular recess defined by radially extending surfaces positioned on an interior of said cap member, the cap member being in the shape of a cone, and said cap member having an opening forming a drain hole therein that is in fluid communication with the annular recess.16. The pitot probe of claim 14, wherein said internal longitudinally extending passageway is open to the at least partially annular recess, and said cap member forming a fluid passageway from the pitot pressure port to the recess, whereby pressure at the pitot pressure sensing port is exerted at the recess and in the internal longitudinally extending passageway of the barrel.17. The pitot probe of claim 16, wherein said barrel has a recess formed on a lower side thereof that opens to an exterior of the barrel, and said recess being open to an interior of the cap member, whereby liquid can accumulate in the recess and ultimately drain out through the opening in the cap member.18. The pitot probe of claim 16, wherein the leading end of the barrel comprises a leading end portion that extends in an upstream direction from the at least part annular recess, and has a conically shaped outer surface, said cap member having a conically shaped inner surface that is spaced from the conically shaped outer surface of the barrel leading end portion to form a fluid pressure passageway between the pitot pressure sensing port and the at least part annular recess.19. The pitot probe of claim 14, wherein said internal longitudinally extending passageway comprises a pressure passage bore adjacent an outer perimeter of the barrel, and a centrally located second bore formed in the barrel and being of size to receive a heater for heating the pitot probe.20. A pressure sensing probe assembly comprising barrel having at least one pressure sensing port, a leading end and a trailing end, the trailing end of the barrel having a reduced diameter shank, a strut having a base end, and a barrel receiving end, said barrel receiving end having a housing forming a bore of size to receive the shank for fixedly mounting the shank on the strut with the shank in the bore, the barrel having a longitudinal axis, the strut curving way from the longitudinal axis such that the base end is offset from the longitudinal axis, said strut being formed of two mirror image strut sections, each of the strut sections being concave and having peripheral edges along a bisecting plane lying along the longitudinal axis of the probe, said peripheral edge of the two strut sections mating and being secured together to form the strut to hold the shank of the barrel.21. The pressure sensing probe of claim 20, wherein there is a separate leading end component comprising a tubular cap secured to the leading end of the barrel, said tubular cap having a conical leading end forming a pressure port extending in an upstream direction, and the tubular cap having a bore at an opposite end, the barrel having a hub for mounting inside the bore at the opposite end of the tubular cap, the barrel having a longitudinal bore fluidly open to the pressure port.22. The method of constructing a pitot probe having a barrel and a strut, comprising forming two sections of a strut in a desired shape which are substantially mirror images of each other; forming a barrel having an end hub portion, the two sections of the strut being mated together to form a bore for receiving the hub portion of the barrel, securing the two sections of the strut and the barrel in an assembly, providing an outer end cap for an end of the barrel opposite from the strut, said end cap mounting on the barrel and being spaced from the barrel to provide a fluid passage from an end opening on the end cap to a bore in the barrel.23. The method of claim 22, wherein said strut sections are stamped metal sections, and said barrel is a solid member having a bore formed therein.24. The method of claim 23, wherein said end cap member is formed to be generally conically shaped with an opening at a leading end thereof, said conically shaped end member having an interior conically shaped surface, and further comprising fitting the conically shaped end cap member onto a leading end of the barrel to provide a fluid passageway from the leading end opening of the end cap member to a bore in the barrel.
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이 특허에 인용된 특허 (13)
Hedberg Eric A. (St. Paul MN) Setterholm Jeffrey M. (Lakeville MN), Aerodynamically shaped probe.
Hagen Floyd W. (Eden Prairie MN) Hohenstein Gregg A. (Bloomington MN) Severson John A. (Eagan MN) Trongard Pennelle J. (Savage MN), Multifunctional air data sensing probes.
Anderson, Morris G.; Payangapadan, Murali Krishnan; Venkatarayappa, Narasimha Reddy; Gordon, Grant A.; Kandula, Rama Sateesh Venkata, Arrangement of dams in air data probe.
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