US 12,376,899 B2
Tissue resecting device including a blade lock and release mechanism
Peter F. Marshall, Bolton, MA (US); and Timothy J. Wood, Wilmington, MA (US)
Assigned to Covidien LP, Mansfield, MA (US)
Filed by Covidien LP, Mansfield, MA (US)
Filed on Nov. 30, 2021, as Appl. No. 17/537,715.
Application 17/537,715 is a continuation of application No. 16/171,479, filed on Oct. 26, 2018, granted, now 11,197,710.
Prior Publication US 2022/0079665 A1, Mar. 17, 2022
Int. Cl. A61B 18/14 (2006.01); A61B 17/32 (2006.01); A61B 17/00 (2006.01); A61B 18/00 (2006.01)
CPC A61B 18/1445 (2013.01) [A61B 17/32002 (2013.01); A61B 2017/00477 (2013.01); A61B 2018/00922 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A tissue resecting device, comprising:
a handpiece assembly; and
an end effector assembly configured to releasably engage the handpiece assembly, the end effector assembly including:
a proximal hub housing;
an inner drive core at least partially disposed within the proximal hub housing;
a cutting member extending distally from the proximal hub housing and operably coupled with the inner drive core such that rotation of the inner drive core drives rotation of the cutting member; and
a spring operably coupled between the inner drive core and the proximal hub housing and configured to releasably lock the inner drive core relative to the proximal hub housing, thereby rotationally locking the cutting member, wherein, in an extended position of the spring in the absence of engagement of the end effector assembly with the handpiece assembly, the cutting member is rotationally locked and wherein, in a compressed position of the spring with the end effector assembly engaged with the handpiece assembly, the cutting member is permitted to rotate,
wherein, engagement of the end effector assembly with the handpiece assembly urges the spring to compress from the extended position to the compressed position to unlock the cutting member.