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:
Dec. 24, 1996
Filed:
Apr. 13, 1995
Bret R Shoberg, Corcoran, MN (US);
Kenneth T Heruth, Maple Grove, MN (US);
Medtronic, Inc., Minneapolis, MN (US);
Abstract
An implantable drug infusion pump filling system includes a filling syringe, a pressure control valve, a filling tube, and an implantable drug infusion pump. The pressure of the drug or agent loaded into the pump is prevented from exceeding a selected maximum pressure by the pressure control valve. The pressure control valve comprises a valve body that has an inlet passage coupled to the filling syringe, an internal chamber, and a discharge passage coupled to the pump. The inlet passage, the internal chamber, and the discharge passage form a flow passage for the flow of the drug. A mandrel is slidably disposed in the valve body. The mandrel is coupled to a flexible membrane, which is, in turn, coupled to a biasing member. When the pressure of the drug or agent acting on the flexible membrane exceeds the spring constant of the biasing member, the mandrel moves to a closed position, shutting off the flow passage.