IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0083702
(2002-02-26)
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발명자
/ 주소 |
- O'Phelan, Michael J.
- Tong, Robert R.
- Christenson, Luke J.
- Rubin, Steven A.
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출원인 / 주소 |
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대리인 / 주소 |
Schwegman, Lundberg, Woessner &
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인용정보 |
피인용 횟수 :
3 인용 특허 :
83 |
초록
▼
Implantable defibrillators are implanted into the chests of patients prone to suffering ventricular fibrillation, a potentially fatal heart condition. Critical components in these devices are aluminum electrolytic capacitors, which store and deliver one or more life-saving bursts of electric charge
Implantable defibrillators are implanted into the chests of patients prone to suffering ventricular fibrillation, a potentially fatal heart condition. Critical components in these devices are aluminum electrolytic capacitors, which store and deliver one or more life-saving bursts of electric charge to a fibrillating heart. These capacitors make up about one third the total size of the defibrillators. Unfortunately, manufacturers of these capacitors have paid little or no attention to reducing the size of these capacitors through improved capacitor packaging. Accordingly, the inventors devised a unique capacitor lid, or header, assembly that allows size reduction. Specifically, one embodiment of the header assembly includes two recesses, each with a depth that allows the head of a rivet (or other fastener) to be substantially flush, or coplanar, with the underside of the header. Another embodiment includes a single recess to receive two rivet heads. The recesses reduce the vertical space necessary to ensure separation of the rivets from internal components of the capacitor and thus allow reduction in the overall height of the capacitor and size of devices, such as implantable defibrillators, that use them.
대표청구항
▼
1. A capacitor comprising:a tubular housing having a longitudinal axis and having an opening defining a plane intersecting the longitudinal axis; a header filling or covering at least a portion of the opening, having a maximum thickness in a dimension parallel to the longitudinal axis, and having on
1. A capacitor comprising:a tubular housing having a longitudinal axis and having an opening defining a plane intersecting the longitudinal axis; a header filling or covering at least a portion of the opening, having a maximum thickness in a dimension parallel to the longitudinal axis, and having one or more recesses, each with a depth, measured in the dimension parallel to the longitudinal axis, which is less than the maximum thickness of the header; and one or more terminals fastened to the header with one or one or more fasteners, each fastener having a head at least partly within one of the recesses. 2. The capacitor of claim 1 wherein the housing and terminals consist essentially of aluminum.3. A capacitor comprising:capacitor casing means; header means attached to the capacitor casing means and having one or more recesses; and terminating means fastened to the header with one or more fasteners, each fastener having a head at least partly within one of the one or more recesses. 4. The capacitor of claim 3 wherein the header comprises first and second layers, with the second layer contacting an end of the fastener opposite the head.5. The capacitor of claim 4 wherein the second layer consists of a material different from the material of the first layer.6. The capacitor of claim 4 wherein the first and second layers have respective first and second thicknesses which comprise the maximum thickness of the header and wherein the depth of each recess is less than the first thickness.7. The capacitor of claim 3, further comprising an active element including at least first and second aluminum foils and at least one electrolyte-impregnated separator between the first and second aluminum foils.8. The capacitor of claim 3, wherein each fastener is an aluminum fastener and wherein the capacitor further comprises an active element including one or more aluminum foils, with at least one of the foils electrically coupled to at least one of the aluminum fasteners.9. The capacitor of claim 3, wherein:the capacitor casing means comprises a tubular can; the header means is mounted to a top portion of the tubular can and includes a lower surface defining at least one of the recesses; and the head of each fastener is connected to an end of a shank. 10. A capacitor comprising:a housing having an opening; a header filling at least a portion of the opening, having a header thickness, and having one or more recesses, each with depth less than the header thickness; and one or more terminals fastened to the header with one or more fasteners, each fastener having an end at least partly within one of the recesses. 11. The capacitor of claim 10, wherein each of the fasteners is a rivet.12. The capacitor of claim 10, further comprising an active element including at least first and second aluminum foils and at least one electrolyte-impregnated separator between the first and second aluminum foils.13. The capacitor of claim 10, wherein the one or more terminals includes first and second recesses; the one or more terminals includes first and second terminals fastened to the header with respective first and second fasteners, each fastener having its head at least partly within a respective one of the first and second recesses.14. The capacitor of claim 12, further including an active element within the housing, wherein each recess faces the active element.15. A capacitor comprising:a tubular can having a bottom and top; a header mounted to the top of the tubular can, and having an upper and a lower surface, the lower surface having at least one recess; and a fastener having at least a shank with a head on one end, the head positioned in the recess of the lower surface. 16. The capacitor of claim 15, further comprising an active element within the tubular can and wherein each recess faces the active element.17. The capacitor of claim 16, wherein the tubular can consists essentially of aluminum, and the active element includes one or more aluminum foils.
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