发明名称 |
Medical capsule device actuated by radio-frequency (RF) signal |
摘要 |
A medical capsule device for releasing a substance at a defined location in the gastrointestinal tract. The device has a capsule body defining one or more apertures in the circumferential wall thereof and a sleeve valve rotatably positioned therein having one or more corresponding apertures in the circumferential wall thereof. The sleeve valve comprises a coil and electrically connected heatable resistor which are operatively associated with an actuator member formed of a shape memory alloy responsive to heat and which will move from a non-heated first shape to a heated second shape. Actuator stop means are provided in the capsule body for being engaged by the actuator member during movement from the non-heated first shape to the heated second shape so that the actuator member movement will serve to rotate the sleeve valve to an open position.
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申请公布号 |
US5167626(A) |
申请公布日期 |
1992.12.01 |
申请号 |
US19920826407 |
申请日期 |
1992.01.27 |
申请人 |
GLAXO INC. |
发明人 |
CASPER, ROBERT A.;MCCARTNEY, MICHAEL L.;JOCHEM, WARREN J.;PARR, ALAN F. |
分类号 |
A61B5/07;A61B10/00;A61F2/00 |
主分类号 |
A61B5/07 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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