IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0484851
(2012-05-31)
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등록번호 |
US-8602164
(2013-12-10)
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발명자
/ 주소 |
- Allred, III, Jimmie B.
- Kummer, Joseph
- Griswold, Michael D.
- Hall, Michael J.
- Bush, Matthew A.
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출원인 / 주소 |
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
1 인용 특허 :
34 |
초록
▼
A dual-use ladder and bridge modular system preferably includes tubes, gussets, flanges, and/or joints. In a preferred embodiment, the tubes, gussets, flanges, and/or joints are made of carbon fiber. A method connects and disconnects modular carbon fiber ladder segments. Another method creates a lig
A dual-use ladder and bridge modular system preferably includes tubes, gussets, flanges, and/or joints. In a preferred embodiment, the tubes, gussets, flanges, and/or joints are made of carbon fiber. A method connects and disconnects modular carbon fiber ladder segments. Another method creates a lightweight carbon-fiber beam with exceptionally high stiffness and strength using a combination of carbon-fiber braid material, uni-directional cloth, and pultruded carbon-fiber strips. A carbon fiber ladder segment and tube connectors are also disclosed.
대표청구항
▼
1. A method of forming at least one carbon fiber ladder segment, comprising the steps of: a) fabricating a pair of tubular carbon fiber side rails having a first end and a second end, comprising the substeps of: i) sandwiching a plurality of carbon fiber strips within a carbon fiber tube between an
1. A method of forming at least one carbon fiber ladder segment, comprising the steps of: a) fabricating a pair of tubular carbon fiber side rails having a first end and a second end, comprising the substeps of: i) sandwiching a plurality of carbon fiber strips within a carbon fiber tube between an inner carbon fiber layer of the carbon fiber tube and an outer carbon fiber layer of the carbon fiber tube; andii) adhering the carbon fiber strips to the carbon fiber tube;b) connecting the pair of tubular carbon fiber side rails to at least one carbon fiber rung such that the carbon fiber rung is perpendicular to the carbon fiber side rails and the carbon fiber rung connects the carbon fiber side rails; andc) adding a joint connector to at least one of the first end and the second end of each carbon fiber side rail. 2. The method of claim 1, wherein the side rails and the rung are connected by bonding. 3. The method of claim 1, wherein step b) comprises the substep of reinforcing a connection between the carbon fiber side rails and the carbon fiber rungs with a carbon fiber gusset. 4. The method of claim 1, wherein step b) comprises the substep of bonding an end of the carbon fiber rung to an interior surface of each of the carbon fiber side rails. 5. The method of claim 1, wherein the inner carbon fiber layer and the outer carbon fiber layer comprise a carbon fiber woven material. 6. The method of claim 1, wherein the outer carbon fiber layer comprises a braided carbon fiber material and the inner carbon fiber layer comprises a material selected from the group consisting of a braided carbon-fiber material and a plain-weave carbon fiber material. 7. The method of claim 1, wherein at least one of the joint connectors is structured such that adjoining ladder segments meet at an angle. 8. The method of claim 7, wherein adjoining ladder segments meet at a 90 degree angle. 9. The method of claim 7, wherein the joint connector comprises a curved angle connector. 10. The method of claim 1, further comprising the step of mating at least one modular element with at least one joint connector. 11. The method of claim 1, wherein the at least one carbon fiber ladder segment comprises a first carbon fiber ladder segment and a second carbon fiber ladder segment, and the method further comprises the step of connecting the first carbon fiber ladder segment to the second carbon fiber ladder segment by reversibly mating the joint connector on an end of a first carbon fiber side rail of the first carbon fiber ladder segment with the joint connector on a second carbon fiber side rail of the second carbon fiber ladder segment to form a structure. 12. The method of claim 11, wherein the joint connector on the end of the first carbon fiber side rail of the first ladder segment comprises a locking element that locks the ladder segment to the joint connector on the second carbon fiber side rail of the second ladder segment. 13. The method of claim 11, wherein a first joint connector comprises a female connection and a second joint connector comprises a male connection. 14. The method of claim 1, wherein the joint connector comprises a pin joint connector. 15. The method of claim 1, wherein the joint connector comprises a splice connection, wherein approximately half of a length of the splice connection is bonded into an end of the carbon fiber side rail and the other half of the splice connection is shaped to fit inside the carbon fiber side rail of an adjoining ladder segment. 16. The method of claim 15, further comprising the step of filling the splice connection with a core material. 17. The method of claim 1, further comprising the step of filling at least one of the carbon fiber side rails, the joint connector, and the carbon fiber rung with a core material. 18. The method of claim 1, wherein at least one of the inner and outer carbon fiber layers comprises a braided carbon fiber material. 19. A method of forming at least one carbon fiber ladder segment, comprising the steps of: a) fabricating a pair of tubular carbon fiber side rails having a first end and a second end, comprising the substep of layering a uni-directional carbon fiber within a carbon fiber tube between an inner carbon fiber layer of the carbon fiber tube and an outer carbon fiber layer of the carbon fiber tube;b) connecting the pair of tubular carbon fiber side rails to at least one carbon fiber rung such that the carbon fiber rung is perpendicular to the carbon fiber side rails and the carbon fiber rung connects the carbon fiber side rails; andc) adding a joint connector to at least one of the first end and the second end of each carbon fiber side rail. 20. The method of claim 19, wherein at least one of the inner and outer carbon fiber layers comprises a braided carbon fiber material. 21. The method of claim 1, wherein the carbon fiber strips are uni-directional carbon fiber strips. 22. The method of claim 21, wherein the uni-directional carbon fiber strips are comprised of pultruded carbon fiber. 23. The method of claim 1, wherein the carbon fiber strips are only located on two opposing sides of the carbon fiber tube.
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