IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0301205
(2002-11-21)
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발명자
/ 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
Michael Best & Friedrich LLP
|
인용정보 |
피인용 횟수 :
12 인용 특허 :
3 |
초록
▼
A radiation-shielding container has an elongated cylindrical base and a cylindrical cap that define a cavity. A reduced portion of the cap extends into the base and includes a planar end surface that engages an internal shoulder within the base, and an external shoulder that engages an annular end s
A radiation-shielding container has an elongated cylindrical base and a cylindrical cap that define a cavity. A reduced portion of the cap extends into the base and includes a planar end surface that engages an internal shoulder within the base, and an external shoulder that engages an annular end surface of the base. The cap is secured to the base by rotating the cap such that tabs defined on the reduced portion slide along inwardly sloping lower engagement surfaces of the base until the tabs abut stop surfaces of the base and are secured by upper engagement surfaces. Removal of the cap is accomplished by rotating the cap in the opposite direction to disengage the tabs from the upper engagement surfaces.
대표청구항
▼
1. A radiation-shielding container for a radiopharmaceutical, the container comprising:a generally cylindrical base formed of a radiation-shielding material and including an inner surface defining a cavity and a central axis, the cavity including an open end and a closed end and the base defining at
1. A radiation-shielding container for a radiopharmaceutical, the container comprising:a generally cylindrical base formed of a radiation-shielding material and including an inner surface defining a cavity and a central axis, the cavity including an open end and a closed end and the base defining at least one helically extending recess that is radially outwardly recessed with respect to the inner surface and extends generally inwardly from the open end; anda generally cylindrical cap formed of a radiation-shielding material and including a generally annular protrusion that is receivable by the cavity, the cap also including at least one tab extending radially outwardly from the annular protrusion and engageable with the at least one recess to secure the cap to the base and to thereby close the cavity. 2. The container of claim 1, wherein the base includes a generally annular shoulder axially inwardly spaced from the at least one helically extending recess and facing the open end, and wherein the annular protrusion includes an end surface that is engageable with the shoulder when the cap is secured to the base. 3. The container of claim 1, wherein the base includes two recesses that are substantially diametrically opposed to one another, and wherein the cap includes two tabs that are substantially diametrically opposed to one another. 4. The container of claim 1, wherein the base includes a lower engagement surface facing toward the open end and at least partially defining the at least one helically extending recess, the lower engagement surface extending circumferentially around the cavity and axially inwardly from the open end. 5. The container of claim 4, wherein the base also includes an arcuate stop surface that extends from an axially innermost edge of the lower engagement surface toward the open end. 6. The container of claim 5, wherein the arcuate stop surface is concaved. 7. The container of claim 6, wherein the at least one tab includes a convex end surface that is substantially matingly engageable with the arcuate stop surface when the cap is secured to the base. 8. The container of claim 5, wherein the base also includes an upper engagement surface facing the lower engagement surface and extending from an axially outer-most edge of the arcuate stop surface toward the open end. 9. The container of claim 8, wherein the stop surface and the upper engagement surface cooperate to define a generally S-shaped surface extending from the axially inner-most edge of the lower engagement surface to the open end. 10. The container of claim 8, wherein the tab is receivable between the lower engagement surface and the upper engagement surface to secure the cap to the base. 11. The container of claim 1, wherein the base and the cap are formed of the same high-density material, and wherein the high-density material is at least one of lead and tungsten. 12. The container of claim 1, wherein the base and the cap are each formed by casting, and wherein the at least one recess and the at least one tab are integrally cast with the base and the cap respectively. 13. A container for radioactive substances comprising:a base including an interior wall defining an open end, a cavity, a central axis, and a recess extending axially inwardly from the open end, the recess including a lower engagement surface facing the open end and extending between a first edge adjacent the open end to a second edge circumferentially and axially inwardly spaced from the first edge, the recess also including a stop surface adjacent the second edge, and an upper engagement surface facing the lower engagement surface and extending from the stop surface toward the open end; anda cap including a cross-sectionally reduced portion receivable by the open end of the base to extend into the cavity, the reduced portion including a radially outwardly extending tab receivable by the recess and engageable with the lower engagement surface, wherein rotation of the cap with re spect to the base about the axis slides the tab along the lower engagement surface and into abutment with the stop surface and the upper engagement surface to thereby secure the cap to the base. 14. The container of claim 13 wherein the cap includes a cap portion extending from the reduced portion and defining an annular shoulder facing the tab, the annular shoulder engaging the open end of the base when the cap is secured to the base. 15. The container of claim 14 wherein when the cap is secured to the base, the shoulder and the open end cooperate to define a plane that is substantially normal to the central axis. 16. The container of claim 13 wherein the reduced portion of the cap includes a distal end and the interior wall of the base defines a shoulder extending radially into the cavity and facing axially toward the open end, and wherein the internal shoulder and the distal end engage each other when the cap is secured to the base. 17. The container of claim 16 wherein the distal end and the shoulder lie in a plane that is substantially normal to the central axis when the cap is secured to the base. 18. The container of claim 13 wherein at least one of the cap and body are formed of a high-density material including at least one of lead and tungsten. 19. The container of claim 13 wherein the tab engages the lower engagement surface, the upper engagement surface, and substantially the entire stop surface. 20. The container of claim 13 wherein the tab includes upper and lower faces that are angled with respect to the central axis. 21. A radiation-shielding container for a radiopharmaceutical, the container comprising:a generally cylindrical base formed of a radiation-shielding material and including an inner surface defining a cavity and a central axis, the cavity including an open end and a closed end and defining a circumference, the base defining at least one helically extending recess that is radially outwardly recessed with respect to the inner surface, extends generally inwardly from the open end and extends only partially around the circumference of the cavity; anda generally cylindrical cap formed of a radiation-shielding material and including a generally annular protrusion that is receivable by the cavity, the cap also including at least one tab extending radially outwardly from the annular protrusion and engageable with the at least one recess to secure the cap to the base and to thereby close the cavity. 22. The container of claim 21, wherein the base includes a generally annular shoulder axially inwardly spaced from the at least one helically extending recess and facing the open end, and wherein the annular protrusion includes an end surface that is engageable with the shoulder when the cap is secured to the base. 23. The container of claim 21, wherein the helically extending recess is a first helically extending recess, the base further defining a second helically extending recess that is radially outwardly recessed with respect to the inner surface and extends generally inwardly from the open end and only partially around the circumference of the cavity, and wherein the tab is a first tab, the cap further including a second tab extending radially outwardly from the annular protrusion and being substantially diametrically opposed to the first tab, and wherein each of the tabs is engageable with one of the recesses to secure the cap to the base and to thereby close the cavity. 24. The container of claim 21, wherein the base includes a lower engagement surface facing toward the open end and at least partially defining the at least one helically extending recess, the lower engagement surface extending partially circumferentially around the cavity and axially inwardly from the open end. 25. The container of claim 24, wherein the base also includes an arcuate stop surface that extends from an axially innermost edge of the lower engagement surface toward the open end. 26. The container of claim 25, wherein the arcuat e stop surface is concaved. 27. The container of claim 26, wherein the at least one tab includes a convex end surface that is substantially matingly engageable with the arcuate stop surface when the cap is secured to the base. 28. The container of claim 25, wherein the base also includes an upper engagement surface facing the lower engagement surface and extending from an axially outer-most edge of the arcuate step surface toward the open end. 29. The container of claim 28, wherein the stop surface and the upper engagement surface cooperate to define a generally S-shaped surface extending from the axially inner-most edge of the lower engagement surface to the open end. 30. The container of claim 28, wherein the tab is receivable between the lower engagement surface and the upper engagement to secure the cap to the base.
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