Common bulkhead for composite propellant tanks
US-8939407-B2 · Jan 27, 2015 · US
Method of making a composite tank having joint with softening strip
US9453293B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9453293-B2 |
| Application number | US-201213541560-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jul 3, 2012 |
| Priority date | Jul 18, 2008 |
| Publication date | Sep 27, 2016 |
| Grant date | Sep 27, 2016 |
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- Title
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- Abstract
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Abstract
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A composite resin tank includes a wall joined to a dome along a joint. A softening strip is located in the joint.
First claim
Opening claim text (preview).
What is claimed is: 1. A method of making a tank subjected to cryogenic temperatures, comprising: laying up a composite resin wall and at least one composite resin dome; bonding the wall to the dome along a joint; fabricating a softening strip; and reducing peak stresses in the joint by placing the softening strip in the joint between the wall and the dome. 2. The method of claim 1 , wherein fabricating the softening strip includes: providing a three dimensional fabric having flexible fibers, and coating the flexible fibers with a thermoplastic binder that is flexible at cryogenic temperatures. 3. The method of claim 1 , wherein coating the fibers is performed by: immersing the fabric in an aqueous solution containing a thermoplastic binder, and drying the fabric. 4. The method of claim 3 , wherein coating the fibers further includes removing air bubbles from the aqueous solution. 5. The method of claim 4 , wherein removing the air bubbles is performed by subjecting the immersed fabric to a vacuum. 6. The method of claim 3 , wherein coating the fibers further includes melting the thermoplastic binder. 7. The method of claim 2 , wherein fabricating the softening strip further includes mechanically working the coated fabric to loosen the fibers. 8. The method of claim 7 , wherein mechanically working the coated fabric is performed by a cold working process. 9. The method of claim 1 , wherein placing the softening strip in the joint includes bonding the softening strip to the composite resin wall and to the composite resin dome. 10. The method of claim 1 , further comprising: co-bonding the composite resin wall, the composite resin dome and the softening strip.
Assignees
Inventors
Classifications
- D04H13/002Primary
characterised by the disposition or nature of their elements · CPC title
Rockets · CPC title
Vessels not under pressure · CPC title
Coatings · CPC title
Arrangements or adaptations of apparatus or instruments, not otherwise provided for · CPC title
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Frequently asked questions
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- What does patent US9453293B2 cover?
- A composite resin tank includes a wall joined to a dome along a joint. A softening strip is located in the joint.
- Who is the assignee on this patent?
- Robinson Michael J, Hand Michael Leslie, Blevins Creed Ernest, and 1 more
- What technology area does this patent fall under?
- Primary CPC classification D04H13/002. Mapped technology areas include Textiles & Paper.
- When was this patent published?
- Publication date Tue Sep 27 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 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).