Patent ID: 7347837
Filing Date: 2008-03-25
Classification: A61M,B01F

Abstract:
1. In combination with a syringe extending along a longitudinal axis and having a cylindrical body and an axially shiftable plunger, an infusion pump comprising: a base; a holder for holding the syringe and pivotal on the base about a first axis substantially perpendicular to the longitudinal axis of said syringe, the holder having a tubular element adapted to grip the cylindrical body of the syringe; a shaft extending along the first axis and supported for rotation about the first axis on the base; first motor means coupled to the shaft; a coupling securing the holder to the shaft and of a type selectable from interlocking and/or contrast and/or friction coupling means, the coupling comprising a seat for containing the holder, formed in the shaft, and provided with cavities in which corresponding protrusions formed in the holder are insertable, whereby the holder can oscillate about the first axis relative to the base; a pusher displaceable linearly on the base transversely of the first axis; second actuation means for pressing the pusher against the plunger and thereby sliding the plunger of said syringe; a controller connected to first actuation means and to the second actuating means for moving the pusher out of engagement with the plunger during oscillation of the syringe about the first axis and for operating the second actuation means only when the first actuation means is not oscillating the syringe to express contents of the syringe; an auxiliary syringe with a plunger thereof; locking means for locking the auxiliary syringe mounted on the base; third actuation means for sliding the plunger of the auxiliary syringe; a stem; elastic means; and a guide, the holder comprising a portion that has a contoured profile for mating with a head of the stem that is inserted so as to be axially slidable, with interposition of the elastic means, in the guide that is formed in the shaft at the seat, the head protruding into the seat, a coupling between the head and the contoured portion being suitable to fix the holder to the shaft.