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US007338028B2
(12) United States Patent ao) Patent No.: Us 7,338,028 B2
Zimmerling et al. (45) Date of Patent: Mar. 4,2008
(56) References Cited
U.S. PATENT DOCUMENTS
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(Continued)
FOREIGN PATENT DOCUMENTS
DE 3242870 Al 6/1983
(Continued)
Primary Examiner—Nicholas D. Lucchesi
Assistant Examiner—Christopher Koharski
(74) Attorney, Agent, or Firm—Bromberg & Sunstein LLP
(57) ABSTRACT
A fluid switch or valve for an implantable fluid delivery system is provided. The fluid switch or valve includes a fluid chamber having a fluid inlet and a fluid outlet and an internal magnet disposed within the fluid chamber. The internal magnet is moveable such that displacement of the internal magnet restricts the flow of fluid through the fluid chamber.
30 Claims, 6 Drawing Sheets
