IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0105038
(2002-03-20)
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발명자
/ 주소 |
- Dunne, James P.
- Pitt, Dale M.
- Kilian, Kevin J.
- White, Edward V.
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출원인 / 주소 |
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
17 인용 특허 :
27 |
초록
▼
The present invention provides an apparatus and method for varying a wall skin to alter airflow over the skin. The apparatus has a first and second end-plates, a plurality of flexible rods are arranged substantially parallel to substantially define a plane, each flexible rod has a mid-point and firs
The present invention provides an apparatus and method for varying a wall skin to alter airflow over the skin. The apparatus has a first and second end-plates, a plurality of flexible rods are arranged substantially parallel to substantially define a plane, each flexible rod has a mid-point and first and second ends secured to the first and second end-plates respectively. Each mounting structure is slidingly attached to the flexible rods between the mid-point and each end-plate, proximate to the end. An elastomer envelops the rods to form a flexible skin. A plurality of shape memory alloy rods are arranged parallel to and define a plane and having each end secured to an end-plate, the plurality of shape memory alloy rods being contractible when heated such that upon contraction the plurality of shape memory allow rods will buckle the plurality of flexible rods and the flexible skin to alter airflow over the skin.
대표청구항
▼
The present invention provides an apparatus and method for varying a wall skin to alter airflow over the skin. The apparatus has a first and second end-plates, a plurality of flexible rods are arranged substantially parallel to substantially define a plane, each flexible rod has a mid-point and firs
The present invention provides an apparatus and method for varying a wall skin to alter airflow over the skin. The apparatus has a first and second end-plates, a plurality of flexible rods are arranged substantially parallel to substantially define a plane, each flexible rod has a mid-point and first and second ends secured to the first and second end-plates respectively. Each mounting structure is slidingly attached to the flexible rods between the mid-point and each end-plate, proximate to the end. An elastomer envelops the rods to form a flexible skin. A plurality of shape memory alloy rods are arranged parallel to and define a plane and having each end secured to an end-plate, the plurality of shape memory alloy rods being contractible when heated such that upon contraction the plurality of shape memory allow rods will buckle the plurality of flexible rods and the flexible skin to alter airflow over the skin. y acting springs disposed between two facing annular surfaces of said first annular member. 11. The device according to claim 1, wherein said elastic force-absorbing elements and said hydraulic thrust bearings are integrated into a skirt for supporting said payload on said launch vehicle. 12. A device for suspending a payload in a launch vehicle for launching said payload into space, the device comprising: a first rigid annular member coupled to a second rigid annular member; a plurality of circumferentially-spaced spring thrust bearings installed between said first and second annular members concentric with a longitudinal axis of the launch vehicle and respectively fastened to said payload and said launch vehicle; and a plurality of circumferentially-spaced hydraulic thrust bearings between said first and second annular members for activating and deactivating said plurality of spring thrust bearings to alter the stiffness of the suspension device, said hydraulic thrust bearings interleaved with said spring thrust bearings and having a first position in which said spring thrust bearings are deactivated and said first and second annular members are rigidly coupled, and a second position in which said spring thrust bearings are activated to reduce a stiffness of said coupling between said first and second annular members. 13. The device according to claim 12, further comprising a circuit for feeding said hydraulic thrust bearings with liquid and including a cylinder for selectively varying a pressure of said liquid between first and second pressure values controlling the placing of the hydraulic thrust bearings in said first and second positions, respectively. 14. The device according to claim 12, wherein said spring thrust bearings and hydraulic thrust bearings are all mounted on the same annular member. 15. The device according to claim 12, wherein said spring thrust bearings each include two head-to-tail bores containing oppositely acting springs disposed between two facing annular surfaces of said first annular member. 16. The device according to claim 12, wherein said spring thrust bearings and said hydraulic thrust bearings are integrated into a skirt for supporting said payload on said launch vehicle. 17. The device according to claim 13, wherein said hydraulic thrust bearings in said first position press said spring thrust bearings against said first annular member. 18. The device according to claim 13, wherein said hydraulic thrust bearings in said second position allow clearance between a flange coupled to said second annular member and said first annular member for spring thrust bearing activation. al.; US-3958779, 19760500, Townsend; US-4096931, 19780600, Whitehurst; US-4533097, 19850800, Aldrich; US-4577738, 19860300, Yater; US-4683407, 19870700, Barba et al.; US-4759515, 19880700, Carl; US-5806805, 19980900, Elbert et al.; US-5921361, 19990700, Sommer; US-6227481, 20010500, Fenny et al.; US-6241182, 20010600, Durandeau et al.
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