US 12,268,387 B2
Hand-held surgical instruments
David A. Nicholas, North Haven, CT (US); Russell Pribanic, North Haven, CT (US); David A. Zeichner, North Haven, CT (US); and Robert H. Knapp, North Haven, CT (US)
Assigned to Covidien LP, Mansfield, MA (US)
Filed by Covidien LP, Mansfield, MA (US)
Filed on Aug. 15, 2023, as Appl. No. 18/449,938.
Application 18/449,938 is a continuation of application No. 17/088,769, filed on Nov. 4, 2020, granted, now 11,737,747, issued on Aug. 29, 2023.
Claims priority of provisional application 62/948,870, filed on Dec. 17, 2019.
Prior Publication US 2023/0389920 A1, Dec. 7, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. A61B 17/068 (2006.01); A61B 17/29 (2006.01); A61B 17/00 (2006.01)
CPC A61B 17/0686 (2013.01) [A61B 2017/00407 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A hand-held surgical instrument, comprising:
a handle housing;
a knob housing coupled to the handle housing;
a shaft portion extending distally from the knob housing and defining a longitudinal axis;
an articulation lever rotationally coupled to the knob housing;
a first articulation shaft operably coupled to the articulation lever, such that a rotation of the articulation lever translates the first articulation shaft to articulate an end effector;
a cam plate coupling the articulation lever with a proximal end portion of the first articulation shaft, the cam plate being configured to urge the first articulation shaft in one of a proximal or distal direction, and comprising at least two pins projecting therefrom and extending in a direction different from the longitudinal axis; and
an articulation locking assembly including:
a first ratchet gear operably coupled to the cam plate and defining at least two ratchet slots, with each of the at least two ratchet slots receiving a corresponding pin in the at least two pins; and
a pawl engaged with the first ratchet gear, wherein the pawl is configured to restrict the rotation of the cam plate.