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. 16, 1987
Filed:
Apr. 14, 1986
Bernard Marion, Montreuil sur Ille, FR;
Sophysa, Montreuil sur Ille, FR;
Abstract
A subcutaneous valve is provided for the treatment of hydrocephalus adapted to be inserted between a ventricular catheter and a distal catheter. The valve comprises a body enclosing a chamber having formed through its cylindrical wall an inlet and outlet passage for cephalorachidian fluid. A rotor is journaled in the chamber for rotation about the chamber axis. A spring blade, fixed to the rotor extends arcuately along a cylindrical wall, bearing deflectably outwardly against a valve member and slides thereon to bias the member against a valve seat with a force depending on the angular position of the rotor and the chamber. The rotor is a disk in the form of a cut-out circular sector having a peripheral surface and two radial end surfaces. A stop means extends from a bottom wall of the chamber between the radial end surfaces of the rotor. The foregoing valve avoids the siphon effect when a patient moves between vertical and horizontal positions and is easily calibrated at any desired closing pressure for implantation.