Polyurethane-based protective coatings for rotor blades
US-2017306177-A1 · Oct 26, 2017 · US
Erosion resistant helicopter blade
US9429025B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9429025-B2 |
| Application number | US-201113805694-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 21, 2011 |
| Priority date | Jun 22, 2010 |
| Publication date | Aug 30, 2016 |
| Grant date | Aug 30, 2016 |
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- Title
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- Abstract
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- Assignees and inventors
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- First independent claim
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- CPC / IPC classifications
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- Citations and related patents
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Abstract
Official abstract text for this publication.
A rotor blade including a main portion having a main portion leading edge shield; a main portion impact-resistant layer formed on a nose of the leading edge shield; a main portion erosion-resistant layer formed on a top and bottom of the main portion, rearward of the main portion impact-resistant layer; a main portion foil formed on the top and the bottom of the main portion rearward of the main portion erosion-resistant layer; a tip cap having a tip cap leading edge shield; a tip cap impact-resistant layer formed on a surface of the tip cap leading edge shield; and a tip cap foil formed on the top and the bottom of the tip cap rearward of the tip cap erosion-resistant layer.
First claim
Opening claim text (preview).
What is claimed is: 1. A rotor blade comprising: a main portion having a main portion leading edge shield; a main portion impact-resistant layer formed on a nose of the leading edge shield; a main portion erosion-resistant layer formed on a top and bottom of the main portion with forward-most edges terminating rearward of a forward section of the main portion impact-resistant layer; a main portion foil formed on the top and the bottom of the main portion with forward-most edges terminating rearward of a forward section of the main portion erosion-resistant layer; a tip cap having a tip cap leading edge shield acting as a tip cap erosion-resistant layer; a tip cap impact-resistant layer formed on a surface of the tip cap leading edge shield; and a tip cap foil formed on the top and the bottom of the tip cap with forward-most edges terminating rearward of a forward section of the tip cap erosion-resistant layer. 2. The rotor blade of claim 1 wherein: the main portion impact-resistant layer is a tungsten carbide layer. 3. The rotor blade of claim 1 wherein: the main portion erosion-resistant layer is a niobium layer. 4. The rotor blade of claim 3 wherein: the main portion erosion-resistant layer overlaps the main portion impact-resistant layer. 5. The rotor blade of claim 3 wherein: the main portion erosion-resistant layer underlaps the main portion impact-resistant layer. 6. The rotor blade of claim 1 wherein: the main portion foil is a steel foil. 7. The rotor blade of claim 1 wherein: the tip cap impact-resistant layer is a tungsten carbide layer. 8. The rotor blade of claim 1 wherein: the tip cap foil is a steel foil. 9. A method of manufacturing a rotor blade comprising: obtaining a main portion having a main portion leading edge shield; applying a main portion erosion-resistant layer on a top and bottom of the leading edge shield; applying a main portion impact-resistant layer on a nose of the leading edge shield with forward-most edges of the main portion erosion resistant layer terminating rearward of a forward section of the main portion impact-resistant layer; applying a main portion foil on the top and the bottom of the main portion with forward-most edges terminating rearward of a forward section of the main portion erosion-resistant layer; obtaining a tip cap having a tip cap leading edge shield acting as a tip cap erosion-resistant layer; applying a tip cap impact-resistant layer on a surface of the tip cap leading edge shield; and applying a tip cap foil on the top and the bottom of the tip cap with forward-most edges terminating rearward of a forward section of the tip cap erosion-resistant layer. 10. The method of claim 9 wherein: the main portion impact-resistant layer is a tungsten carbide layer. 11. The method of claim 9 wherein: the main portion erosion-resistant layer is a niobium layer. 12. The method of claim 11 wherein: the main portion erosion-resistant layer overlaps the main portion impact-resistant layer. 13. The method of claim 11 wherein: the main portion erosion-resistant layer underlaps the main portion impact-resistant layer. 14. The method of claim 9 wherein: the main portion foil is a steel foil. 15. The method of claim 9 wherein: the tip cap impact-resistant layer is a tungsten carbide layer. 16. The method of claim 9 wherein: the tip cap foil is a steel foil.
Assignees
Inventors
Classifications
- B64C11/205Primary
for protecting blades, e.g. coating · CPC title
Protective coatings for blades · CPC title
by torch or flame spraying · CPC title
- F01D5/147Primary
Construction, i.e. structural features, e.g. of weight-saving hollow blades (F01D5/148, F01D5/16 and F01D5/20 take precedence; blade shape F01D5/141; blades with cooling or heating channels or cavities F01D5/18; heating, heat-insulating or cooling means on blades F01D5/18) · CPC title
Constructional features · CPC title
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Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US9429025B2 cover?
- A rotor blade including a main portion having a main portion leading edge shield; a main portion impact-resistant layer formed on a nose of the leading edge shield; a main portion erosion-resistant layer formed on a top and bottom of the main portion, rearward of the main portion impact-resistant layer; a main portion foil formed on the top and the bottom of the main portion rearward of the mai…
- Who is the assignee on this patent?
- Harris Jr William C, Kopchik John P, Ely Richard, and 1 more
- What technology area does this patent fall under?
- Primary CPC classification B64C11/205. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Aug 30 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).