A - Human Necessities – 61 – M
Patent
A - Human Necessities
61
M
128/86
A61M 5/315 (2006.01) A61M 5/24 (2006.01)
Patent
CA 1230028
ABSTRACT OF THE DISCLOSURE A dispensing device suitable for use in dispensing predetermined, in succession quantities of fluid from a reservoir member in the device is disclosed. The device, consists of an elongated body which further consists of separable top and bottom sections. The top section of the elongate body contains the functions for mechanically advancing an axially movable piston rod which itself drives a piston plug located inside of the reservoir member so as to express fluid from the reservoir via a needle located at the front or the bottom end of the body. The piston rod which is threaded, advances in successive axial steps of fixed length through rotation of a rotatable piston rod nut whose threads interact with the threads on the piston rod. The piston rod nut is driven by a rotatable worm or screw, which in turn is rotated by advancing axial movement of a pressure device located at the top of the elongated body. The user pushes the pressure device directly or indirectly to dispense the fluid. A unidirectional transmission system couples the pressure device to a rotatable screw and the screw to the piston rod nut so that the piston rod nut rotates only when the pressure device is pushed into the elongated body. The elongated body is comprised also of a bottom section, inside of which is the reservoir member and at the bottom end of which is a double-pointed hollow needle with one point extending axially out from the elongated body and the other point extending axially inside the body and into the reservoir member.
470921
Rex Jorn
Vogeley Otto A.
Mccarthy Tetrault Llp
Novo Industri A/s
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