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:
Apr. 18, 2000
Filed:
Apr. 17, 1998
Robert G Kraus, Attleboro, MA (US);
Johnson & Johnson Professional, Inc., Raynham, MA (US);
Abstract
A shunt valve system includes an implantable shunt valve and a device for obtaining pressure setting information from the shunt valve after it is implanted under the scalp of a patient. The device includes a housing that is externally mountable on the patient's head proximate the shunt valve. A fluid-filled chamber is formed in the housing in which a ferromagnetic indicator is movable. The position of the ferromagnetic indicator corresponds to an indicator magnet located within the implanted shunt valve. In one embodiment, the indicator magnet is affixed to a cam which forms a portion of a stepping motor used to a select a pressure setting for the shunt valve. From the position of the ferromagnetic indicator, which corresponds to the indicator magnet and the cam, the pressure setting of the shunt valve can be determined.