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:
Jun. 30, 1987
Filed:
Dec. 23, 1985
Michael D Hooven, Miami, FL (US);
Cordis Corporation, Miami, FL (US);
Abstract
A non-invasively adjustable cerebrospinal fluid pressure relief valve includes a magnetized element which is positionable, through application of an external magnetic field, to permit post-implantation adjustment of the valve's opening threshold pressure setting. An indicator for non-invasively ascertaining the relative adjustment setting of the valve following implantation includes a magnetic pointer which rotates to a position in alignment with the magnetic field produced by the magnetized element. To provide a reference against which the relative valve setting can be measured, the indicator includes an alignment structure which repeatably orients the indicator relative to the implanted valve.