Patent ID: 11864768
Assignee: COVIDIEN LP
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 0:
1. A handheld surgical device comprising:
a surgical reload including an annular staple pusher and a circular knife carrier;
a handle assembly including:
a plurality of motors; and
a plurality of rotatable drive shafts each of which is coupled to one of the motors; and

an adapter assembly selectively connectable to the handle assembly and the surgical reload, the adapter assembly including:
an adapter housing configured and adapted for connection with the handle assembly;
an outer tube having a proximal end supported by the adapter housing and a distal end configured to connect to the surgical reload, wherein the distal end of the outer tube is in operative communication with the annular staple pusher and the circular knife carrier;
a trocar assembly disposed within the outer tube, the trocar assembly including a trocar drive screw and a trocar member threadably supported on a distal end portion of the trocar drive screw;
a first transmission assembly interconnecting a first rotatable drive shaft of the rotatable drive shafts and the trocar drive screw;
a second transmission assembly interconnecting a second rotatable drive shaft of the rotatable drive shafts and the annular staple pusher;
a third transmission assembly interconnecting a third rotatable drive shaft of the rotatable drive shafts and the circular knife carrier; and
a strain gauge assembly supported within the outer tube and configured to measure strain imparted by the first, second, and third transmission assemblies on the trocar assembly, the annular staple pusher, and the circular knife carrier, respectively.