The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 02, 1986
Filed:
Aug. 18, 1983
Salomon Hakim, Bogota, CO;
Carlos A Hakim, Fort Lauderdale, FL (US);
Other;
Abstract
A technique for transmitting from within the body information concerning an internal parameter (e.g., a measurement of a physiopathological parameter or a parameter generated by an implanted pacemaker), without physical connections to the implanted device, without an externally applied or internally generated electromagnetic field, and without implantation of radioactive material. The implanted device generates a magnetic field having an orientation influenced by changes in the internal parameter. The field is generated by one or more permanent magnets in the implanted device. The orientation of the field is detected externally using a viewer that provides a display indicative of the orientation. The display may provide an image of the magnetic field (e.g., a compass needle or magnetometer) that aligns itself with the field in a known manner. The magnetic field can be generated by a rotatable element on which are carried one or more permanent magnets (e.g., a disk of a magnetic alloy such as samarium cobalt on which has been impressed one or more magnetic regions). In some embodiments the image seen in the viewer is in the form of a pointer (e.g., an arrow) and is provided by implanted magnets that have a north/south boundary of the same shape. If the internal parameter is a fluid pressure, the implanted device may include a diaphragm manometer with a rotatable drum (e.g., rotated by levers connected to the diaphragm and arranged to pull a thread wrapped around the drum) on which is mounted the previously mentioned disk with impressed magnetic regions.