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

Claim 20:
21. 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 second internal housing is included within the housing that largely surrounds the plurality of tube-engaging members, with only ends of the plurality of tube-engaging members extending out from the second internal housing through an opening into the assembly receptacle,
wherein the second internal housing is sealed at locations rearward of the tube engaging members to restrict possible fluid leakage from reaching further into the housing, and
wherein weep hole apertures, that are connected to interior locations of the second internal housing, are located in the assembly receptacle at a front of the LVP pump.