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:
Feb. 21, 2012
Filed:
Apr. 19, 2007
Helene Juhldal Knopper, Frederiksberg, DK;
Carsten Lund, Vordingborg, DK;
Niels Frederik Keiser-nielsen, Niva, DK;
Helene Juhldal Knopper, Frederiksberg, DK;
Carsten Lund, Vordingborg, DK;
Niels Frederik Keiser-Nielsen, Niva, DK;
Novo Nordisk A/S, Bagsvaerd, DK;
Abstract
The present application relates to methods and devices for providing a reduced risk of free flow from medical devices such as an infusion pump. A medicament containing reservoir () is provided with a piston having a sealing portion () formed by a material of a first stiffness. The piston further comprises a core member () of a material having a stiffness larger than said first stiffness, the core member comprising one or more connective members () being adapted to cooperate with said one or more protrusions of the linear actuation member. The one or more connective members being adapted to be substantially rigid in the axial direction while being resilient in a radial direction, thereby forming a releasable snap or friction fit connection with the linear actuation member. Thereby a mechanism is provided which is engageable by a purely axial relative displacement and which is disengageable by retracting the linear actuation member axially relative to the piston by exerting a pulling force greater than a predetermined limit.