Ice resistant pitot tube

Patent metadata

Field	Value
Publication number	US-9631960-B2
Application number	US-201514922434-A
Country	US
Kind code	B2
Filing date	Oct 26, 2015
Priority date	Oct 31, 2012
Publication date	Apr 25, 2017
Grant date	Apr 25, 2017

Abstract

A pitot tube includes a substantially cylindrical body portion having an interior defining a flow passage, and a tip portion extending along a pitot tube axis from the body portion. The tip portion includes an inlet opening, a radially tapered outer surface extending from the body portion toward the inlet opening, one or more bulkheads disposed at the interior to limit travel of particles ingested into the interior, at least one drain opening disposed directly adjacent to one of the one or more bulkheads, and one or more electrical coils comprising one or more coil wraps disposed at an interior of the pitot tube. The one or more coil wraps establish a variable watt density along the interior of the pitot tube. The one or more coil wraps also establish a variable watt density downstream of one or more of the one or more bulkheads.

First claim

The invention claimed is:

1. A pitot tube comprising:
a substantially cylindrical body portion having an interior defining a flow passage; and
a tip portion extending along a pitot tube axis from the body portion, the tip portion including:
an inlet opening;
a radially tapered outer surface extending from the body portion toward the inlet opening;
one or more bulkheads disposed at the interior to limit travel of particles ingested into the interior;
at least one drain opening disposed directly adjacent to one of the one or more bulkheads; and
one or more electrical coils comprising one or more coil wraps disposed at an interior of the pitot tube, the one or more coil wraps establishing a variable watt density along the interior of the pitot tube, the one or more coil wraps also establishing a variable watt density downstream of one or more of the one or more bulkheads.

2. A pitot tube comprising:
a substantially cylindrical body portion having an interior defining a flow passage; and
a tip portion extending along a pitot tube axis from the body portion, the tip portion including:
an inlet opening;
a radially tapered outer surface extending from the body portion toward the inlet opening; and
one or more electrical coils comprising one or more coil wraps disposed at an interior of the pitot tube, the one or more coil wraps establishing a variable watt density along the interior of the pitot tube.

3. The pitot tube of claim 2 , wherein the radially tapered outer surface has a concave curve.

4. The pitot tube of claim 2 , further comprising one or more bulkheads disposed at the interior to limit travel of particles ingested into the interior.

5. The pitot tube of claim 4 , wherein the one or more bulkeads are disposed between a forward-most coil wrap and a drain opening.

6. The pitot tube according to claim 5 , wherein additional ones of the one or more bulkeads are disposed between the inlet opening and the drain opening.

7. The pitot tube of claim 4 , wherein the particles are ice crystals.

8. A pitot tube comprising:
a substantially cylindrical body portion having an interior defining a flow passage; and
a tip portion extending along a pitot tube axis from the body portion, the tip portion including:
an inlet opening;
a radially tapered outer surface extending from the body portion toward the inlet opening;
one or more bulkheads disposed at the interior to limit travel of particles ingested into the interior; and
one or more electrical coils comprising one or more coil wraps disposed at an interior of the pitot tube, the one or more coil wraps establishing a variable watt density downstream of one or more of the one or more bulkheads.

9. The pitot tube according to claim 8 , wherein the one or more bulkheads includes a first bulkhead and a second bulkhead arranged downstream of the first bulkhead.

10. The pitot tube according to claim 9 , wherin the one or more coil wraps establishes a variable watt density downstream of each of the first and second bulkheads.

11. The pitot tube of claim 8 , wherein the one or more bulkeads are disposed between a forward-most coil wrap and a drain opening.

12. The pitot tube according to claim 11 , wherein additional ones of the one or more bulkeads are disposed between the inlet opening and the drain opening.

13. The pitot tube of claim 8 , wherein the radially tapered outer surface has a concave curve.

14. The pitot tube of claim 8 , wherein the particles are ice crystals.

15. A pitot tube comprising:
a substantially cylindrical body portion having an interior defining a flow passage; and
a tip portion extending along a pitot tube axis from the body portion, the tip portion including:
an inlet opening;
a radially tapered outer surface extending from the body portion toward the inlet opening;
one or more bulkheads disposed at the interior to limit travel of particles ingested into the interior; and
at least one drain opening disposed directly adjacent to one of the one or more bulkheads.

16. The pitot tube according to claim 15 , further comprising: one or more electrical coils comprising one or more coil wraps disposed at an interior of the pitot tube, the one or more coil wraps establishing a variable watt density downstream of one or more of the one or more bulkheads, wherin the one or more coil wraps establishes a variable watt density downstream of each of the first and second bulkheads.

17. The pitot tube according to claim 16 , wherein the at least one drain opening is arranged direcly adjacent the second bulkhead.

18. The pitot tube according to claim 17 , further comprising: one or more electrical coils comprising one or more coil wraps disposed at an interior of the pitot tube, the one or more coil wraps being arranged between the inlet opening and the at least one drain opening.

19. The pitot tube of claim 15 , wherein the radially tapered outer surface has a concave curve.

20. The pitot tube of claim 15 , wherein the particles are ice crystals.

Assignees

• Rosemount Aerospace Inc

Inventors

• Seidel Greg
• Golly Timothy Thomas
• Johnson Paul Robert

Classifications

• G01F1/46 Primary

  Pitot tubes · CPC title

• G01P5/165 Primary

  Arrangements or constructions of Pitot tubes · CPC title