Patent ID: 9713672
Date: 2017-07-25
CPC Classifications: A61M,F04C

Claim:
1. A medical injection system, comprising: a disposable pump cartridge comprising a shell and a piston contained within an inner surface of the shell, the shell including a first opening, a second opening, a fill port, and an injection port, the piston including a pressure seal extending thereover and a bore extending therethrough, the bore including a first portion and a second portion, and the pressure seal in sliding and sealing engagement with the inner surface of the shell; a housing including a base plate; a pressure plate member configured to open and close with respect to the base plate and to form a hull when closed against the base plate, the hull containing the pump cartridge therein, the pressure plate member including a fixed gear mounted thereon, the fixed gear being located for insertion through the second opening of the shell of the pump cartridge, to engage with the first portion of the piston bore, when the pressure plate member contains the pump cartridge; a motor contained within the housing and including a drive shaft extending through the base plate to a terminal end thereof; a pump drive member coupled to the terminal end of the drive shaft and located for insertion through the second opening of the shell of the pump cartridge, to engage with the second portion of the piston bore, when the hull contains the pump cartridge, the engaged drive member moving the piston, when the motor is activated, to create an expanding cavity and a contracting cavity within the shell, the expanding cavity being in fluid communication with the fill port of the shell, the contracting cavity being in fluid communication with the injection port of the shell, and the pressure seal sealing the expanding and contracting cavities from one another and from the first and second openings of the shell; a plurality of fluid reservoirs coupled to a manifold assembly; a fill tubing line extending between the manifold assembly and the hull, the fill tubing line including a first end coupled to the manifold assembly, and a second end coupled to the fill port of the pump cartridge; and an injection tubing line having a first end coupled to the injection port of the pump cartridge and extending away from the hull to a second end thereof.