Patent ID: 8556922

Claim:
An assembly for a motorized surgical instrument, the assembly comprising: a one-piece base having an external base wall extending along a first longitudinal axis between a first base end and a second base end and having: at least one transverse wall extending transverse to the first longitudinal axis and towards an interior of the one-piece base, a rotor housing chamber defined by the base within the external base wall and between at least a first transverse wall of the at least one transverse wall and the second base end, a first bearing housing defined by the base between the first base end and the first transverse wall located adjacent the rotor housing chamber, a second bearing housing defined by the base between the second base end and a plate wall located on an opposite side of the rotor housing chamber from the first bearing housing, a bearing located in the second bearing housing configured to engage a rotatable shaft, and a passage defined by the base and extending along a second longitudinal axis offset from the first longitudinal axis and along an exterior of the first bearing housing and the rotor housing chamber, the passage configured to direct a pressurized fluid through the base to the rotor housing chamber; wherein the rotor housing chamber, the first bearing housing, the second bearing housing, and the at least one transverse wall are one-piece with the one-piece base.