IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
|
출원번호 |
US-0138300
(2002-05-06)
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발명자
/ 주소 |
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출원인 / 주소 |
- Lockheed Martin Corporation
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대리인 / 주소 |
Burns, Doane, Swecker & Mathis, L.L.P.
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인용정보 |
피인용 횟수 :
17 인용 특허 :
26 |
초록
▼
An apparatus for releasably attaching a closure plate to an open end of a cylindrical casing, the apparatus having an inner member; a threaded outer ring biased in tension, disposed adjacent to the inner member, for releasably engaging an interior wall of the casing; and a eutectic spacer between th
An apparatus for releasably attaching a closure plate to an open end of a cylindrical casing, the apparatus having an inner member; a threaded outer ring biased in tension, disposed adjacent to the inner member, for releasably engaging an interior wall of the casing; and a eutectic spacer between the inner member and the outer ring. At temperatures below the melting point of the eutectic spacer, the outer ring is held in threaded engagement with the casing, and holds the closure plate in position in abutment with the casing. When the temperature of the eutectic spacer reaches its melting temperature, the eutectic spacer transitions to a liquid state, flows away from the apparatus, allowing the outer ring to retract into a groove in the inner member, and the closure to be released from the casing.
대표청구항
▼
1. An apparatus for releasably attaching a closure plate to an open end of a cylindrical casing, comprising:an inner member;a threaded outer ring having threads biased in tension, the threaded outer ring disposed adjacent to the inner member, said threads releasably engaging an interior wall of the
1. An apparatus for releasably attaching a closure plate to an open end of a cylindrical casing, comprising:an inner member;a threaded outer ring having threads biased in tension, the threaded outer ring disposed adjacent to the inner member, said threads releasably engaging an interior wall of the casing; anda eutectic spacer between the inner member and the outer ring. 2. An apparatus as in claim 1, wherein the inner member has an outer peripheral surface and a groove formed in the outer peripheral surface for holding a eutectic spacer and a portion of the outer ring. 3. An apparatus as in claim 1, wherein the inner member has a first radially extending portion, a second radially extending portion, and an axially extending central portion between the first radially extending portion and the second radially extending portion; the first radially extending portion, second radially extending portion and axially extending central portion defining a groove in an outer peripheral surface of the inner member, the eutectic spacer and the outer ring being at least partially located in the groove. 4. An apparatus as in claim 1, wherein the inner member is an inner ring disposed adjacent to the closure plate. 5. An apparatus as in claim 1, wherein the inner member is the closure plate. 6. An apparatus as in claim 1, wherein the outer ring has an outer peripheral surface, and the threads are external threads disposed on the outer peripheral surface sized to match a threaded surface on an inside wall of the casing. 7. An apparatus as in claim 6, wherein the external threads are helical screw-type threads. 8. An apparatus as in claim 1, wherein the eutectic spacer has a melting point below that of an inner ring and the outer ring. 9. An apparatus as in claim 1, wherein the eutectic spacer is disposed within a groove and the outer ring is at least partially within the groove. 10. An apparatus as in claim 1, wherein the eutectic spacer comprises:a metal alloy. 11. An apparatus as in claim 10, wherein the metal alloy comprises:a tin bismuth alloy. 12. An apparatus as in claim 11, wherein the metal alloy comprises:an alloy having about 42 percent tin and 58 percent bismuth by weight. 13. An apparatus as in claim 1, wherein the eutectic spacer has a melting temperature of about 281 degrees Fahrenheit. 14. An apparatus as in claim 1, comprising:bleed means for releasing the eutectic spacer when in a melted state. 15. An apparatus as in claim 14, wherein the bleed means comprise:at least one hole in the inner member, the hole extending from a first surface of the inner member in contact with the eutectic spacer to a second surface of the inner member. 16. An apparatus as in claim 1, further comprising:holding means for holding the outer ring in an expanded position while a liquid eutectic material is added to a space between the outer ring and the inner member. 17. An apparatus as in claim 16 wherein the holding means comprise:at least one tooling hole formed in the apparatus having a portion which extends through an axially extending portion of the inner member, and a portion which extends into the outer ring;wherein the portion of the tooling hole extending through a radially extending portion of the inner member and the portion of the tooling hole extending through the outer ring are axially aligned when the outer ring is in an expanded position. 18. An apparatus as in claim 1, in combination with an open end of a cylindrical casing. 19. An apparatus as in claim 1 in combination with a closure plate and an open end of a cylindrical casing. 20. A method for assembling an apparatus for releasably attaching a closure plate to a cylindrical casing wherein an inner member is sized to fit within a hollow cylindrical casing, the inner member having a groove formed on an outer peripheral surface of the inner member; and an outer ring is sized to fit within the groove of the inner member, the outer ring having two ends and a threaded outer peripheral surface, the method comprising:positioning the outer ring partially within the groove of the inner member; andforming a eutectic spacer in an annular space defined by a surface of the outer ring in an expanded position and a surface of the inner member by filling the annular space with a liquid eutectic material, and cooling the liquid eutectic material to form a solid eutectic spacer while the outer ring is held in an expanded position. 21. A method as in claim 20 comprising:filling an opening formed by two ends of the outer ring and by a surface of the inner member with liquid eutectic material to form the solid eutectic spacer, wherein the solid eutectic spacer has an arcuate section extending radially outward to the outer peripheral surface of the outer ring. 22. A method as in claim 21, further comprising:forming external threads on the outer peripheral surface of the arcuate section of the solid eutectic spacer. 23. A method for releasably attaching a closure plate to a cylindrical casing with an apparatus including an externally threaded outer ring, biased in tension, disposed adjacent to an inner member for releasably engaging an interior wall of the cylindrical casing, and bleed means for releasing a eutectic spacer when in a melted state, and wherein the eutectic spacer is located between the inner member and the outer ring, the method comprising:fitting the closure plate within an opening in an open end of the cylindrical casing so the closure plate abuts an internal surface of the cylindrical casing; andthreading the apparatus into the cylindrical casing so the external threads of the outer ring engage internal threads of the cylindrical casing, wherein the apparatus holds the closure plate in contact with the casing.
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