Laminated wall tubing
AssigneeThe United States of America as represented by the Secretary of the Army
InventorEarl C. Ricks
Life of this patent
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Abstract
A large diameter rocket launch tube comprised of a pair of thin sheets wh are rolled and positioned in concentric relation with the seams disposed in spaced (180.degree.) relation. A pair of reinforcing weld strips are positioned inside the tube adjacent the seams, and a second pair of reinforcing strips are positioned inside the tube intermediate the first pair of strips. A bonding agent is spread on the inner tube and the tubes are assembled and spot welded prior to having the adhesive cured.
Claims2
A laminated tubular structure comprising:
- a. first and second sheet members rolled in tubular concentric relation and positioned so that the seam of each rolled sheet is spaced 180.degree. apart;
- b. bonding means disposed between said sheets;
- and
- c. reinforcing strips positioned in said second member, a first pair of reinforcing strips disposed adjacent said seams, a second pair of said reinforcing strips being spaced 90.degree. from said first pair of reinforcing strips, said reinforcing strips and said sheet member being resistance welded along the length of said tubular structure.
A method of fabricating a tubular structure from a pair of flat members including the steps of:
- a. applying a bonding agent on adjacent surfaces of said sheets;
- b. rolling and positioning said members in concentric relation with the seams of said members being spaced 180.degree. apart;
- c. positioning reinforcing members along the inside surface of the inner said flat member;
- d. clamping said rolled flat members and said reinforcing members about a mandrel;
- e. progressively moving the tubular structure off the mandrel while resistance welding the tubular structure along the length thereof;
- and,
- f. curing said bonding agent.
Dependencies are inferred from the claim text.