US 12,478,359 B2
Surgical instruments and manufacturing methods facilitating durable engagement between components of different materials
Andrew P. Bolognese, West Newton, MA (US); Ryan M. McEvoy, Billerica, MA (US); and Dale E. Whipple, Nashua, NH (US)
Assigned to Covidien LP, Mansfield, MA (US)
Filed by Covidien LP, Mansfield, MA (US)
Filed on Sep. 13, 2022, as Appl. No. 17/943,769.
Prior Publication US 2024/0081794 A1, Mar. 14, 2024
Int. Cl. A61B 17/00 (2006.01)
CPC A61B 17/00 (2013.01) [A61B 2017/00398 (2013.01); A61B 2017/00477 (2013.01); A61B 2017/00526 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An assembly of a surgical instrument, comprising:
an outer component of a first material, the outer component having an interior surface;
an inner component of a second material different from the first material, the inner component having an exterior surface, the inner component inserted at least partially into the outer component to define a volume between the interior surface of the outer component and the exterior surface of the inner component, wherein the volume includes a plurality of longitudinal channels defined within one of the outer component or the inner component and a plurality of annular channels defined within another of the outer component or the inner component, the plurality of longitudinal channels extending longitudinally along at least a portion of a length of the volume, the plurality of annular channels extending about at least a portion of a circumference of the volume in perpendicular orientation relative to the plurality of longitudinal channels; and
a bonding agent at least partially filling each longitudinal channel of the plurality of longitudinal channels and each annular channel of the plurality of annular channels to bond the first component with the second component.
 
11. An assembly of a motor-driven surgical handpiece assembly, comprising:
a core body made of a plastic, the core body including an interior surface;
a motor housing made of a metal, the motor housing having an exterior surface, the motor housing inserted at least partially into the core body to define a volume between the interior surface of the core body and the exterior surface of the motor housing, wherein the volume includes a plurality of spaced-apart longitudinal channels and a plurality of spaced-apart annular channels; and
a bonding agent at least partially filling each longitudinal channel of the plurality of spaced-apart longitudinal channels and each annular channel of the plurality of spaced-apart annular channels to bond the core body with the motor housing.