A - Human Necessities – 61 – M
Patent
A - Human Necessities
61
M
A61M 5/145 (2006.01)
Patent
CA 2523485
A lead screw mounting system for a syringe pump in which a second end of a lead screw is located within a hollow connection tube that connects a drive device engaged with the lead screw to a plunger drive head. A bearing mount is formed at the second end of the lead screw and a split bearing mounted to the bearing mount. The bearing mount has diverging bearing surfaces in an hour glass shape and the bearing has a complementary inner shape. The bearing is larger than the inner diameter of the connection tube and is in constant contact with the tube. During operation, the bearing tends to move up one or the other of the diverging bearing surfaces of the bearing mount depending on which direction the hollow connection tube is moving over the bearing creating a wedge action. The split bearing functions to keep the lead screw concentrically located within the hollow connection tube thereby increasing flow uniformity of the syringe pump.
L'invention concerne un système de montage de vis-mère pour une pompe à seringue dans laquelle une seconde extrémité de la vis-mère est suitée dans un tube de couplage creux qui est relié à un dispositif d'entraînement couplé à la vis-mère à une tête d'entraînement de piston. Un montage support est formé au niveau d'une seconde extrémité de la vis-mère et un support divisé est monté sur le montage support. Ce montage support comprend des surfaces support divergentes en forme de sablier et le support comprend une forme interne complémentaire. Il est plus grand que le diamètre interne du tube de couplage et en contact constant avec celui-ci. En fonctionnement, le support tend à se déplacer sur l'une ou l'autre des surface support divergentes du montage support en fonction de la direction dans laquelle se déplace le tube de couplage creux sur le support en créant une action de blocage. Le support divisé agit de manière à maintenir la vis-mère concentrique dans le tube de couplage creux augmentant ainsi l'uniformité d'écoulement de la pompe à seringue.
Cardinal Health 303 Inc.
Carefusion 303 Inc.
Smart & Biggar
LandOfFree
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