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

Claim 19:
20. A large volume pump (LVP) that provides peristaltic pumping to supply medical infusate, comprising:
a housing including an assembly receptacle,
a drive-train assembly providing mechanical peristaltic movement, including:
a stepper motor, located within the housing; and
a camshaft assembly, driven by the stepper motor, 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; and

a controller located within the housing that controls operation of the stepper motor and the camshaft assembly to move the plurality of tube engaging members in a peristaltic manner,
wherein a suspended rigid pressure plate for tube compression is located on a receptacle door that is hinged to the housing adjacent the assembly receptacle,
wherein the assembly receptacle includes a set of horizontally-disposed guide rails located above and below the tube-engaging members to prevent vertical tube walk, and
wherein the set of horizontally-disposed guide rails includes three projection features to define planar contact with the suspended rigid pressure plate.