Patent ID: 11904133
Assignee: SMITHS MEDICAL ASD, INC.
Field: Medical technology (Instruments)
Classification: CPC A  F | IPC A  F

Claim 18:
19. A large volume pump (LVP) system that provides peristaltic pumping to supply medical infusate, comprising:
a pump housing including an assembly receptacle;
a drive-train assembly providing mechanical peristaltic movement, including:
a stepper motor, located within the pump housing; and
a camshaft assembly, driven by the stepper motor and at least partially extending into the assembly receptacle, including:
a unitary camshaft; and
a plurality of tube engaging members that cooperatively move according to rotation of the unitary camshaft, wherein a portion of each tube engaging member extends at least partially into the assembly receptacle;

a controller located within the pump housing that controls operation of the stepper motor and the camshaft assembly to move the plurality of tube engaging members in a peristaltic manner;
an administration set tubing assembly that is removably couplable with the assembly receptacle, including:
a peristaltic tube suitable for compression by the drive-train assembly;
a first tube coupler and a second tube coupler, each attached at opposing ends of the peristaltic tube and each having a lumen in fluidic communication with the peristaltic tube; and
a frame coupled to the first tube coupler and the second tube coupler at spaced-apart locations, the frame configured for releasable attachment to the assembly receptacle in which the peristaltic tube is positioned for engagement with the plurality of tube engaging members; and

a receptacle door coupled to the pump housing and including a door lever linked to a pusher, the receptacle door movable between an open position to allow access to the assembly receptacle and a closed position to block access to the assembly receptacle,
wherein, when the administration set tubing assembly is removably coupled in the assembly receptacle and the receptacle door in the closed position, the door lever is configured to be movable to a latched position such that the pusher mechanically contacts a free-flow protection arm of the administration set tubing assembly to move the free-flow protection arm to a flow-allowing position.