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:
Aug. 05, 1980
Filed:
Feb. 22, 1978
Eugene B Spitz, Media, PA (US);
Richard E Brenz, Media, PA (US);
Charles C Hansford, Phoenixville, PA (US);
Medical Devices, Inc., Media, PA (US);
Abstract
An improved cerebrospinal fluid draining system adapted for insertion into the human body in order to control fluid flow passage of the cerebrospinal fluid from an area in the vicinity of the brain to a remote point of the body. The cerebrospinal fluid drain system includes a longitudinally extended sleeve member having a through opening in fluid communication with a catheter extending into the brain area of the body. A check valve mechanism having an inlet opening is in fluid communication with the sleeve member for receiving the fluid and includes an outlet passage for egressing fluid inserted under pressure into the check valve mechanism. The check valve mechanism includes a hinge element formed at a predetermined location to allow opening of the outlet passage responsive to a predetermined fluid pressure value and to further reliably close the outlet passage when the fluid pressure is less than some predetermined value.