Patent ID: 11950966
Assignee: FLEXDEX, INC.
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 7:
8. A surgical tool assembly, comprising:
a handle assembly establishing a handle axis;
a frame assembly, said frame assembly having a shaft, said shaft establishing a shaft axis;
a first intermediate rigid body extending from said handle assembly;
a second intermediate rigid body extending from said frame assembly;
a third intermediate rigid body;
a first joint residing between said first intermediate rigid body and said third intermediate rigid body, said first joint providing a pitch rotational degree of freedom or a yaw rotational degree of freedom of said first intermediate rigid body with respect to said third intermediate rigid body; and
a second joint residing between said second intermediate rigid body and said third intermediate rigid body, said second joint providing a pitch rotational degree of freedom or a yaw rotational degree of freedom of said third intermediate rigid body with respect to said second intermediate rigid body, the pitch or yaw rotational degree of freedom provided by said second joint being opposite the pitch or yaw rotational degree of freedom provided by said first joint;
wherein a virtual center of rotation established by said first joint and by said second joint resides at a location that is occupied by said handle assembly, by a user's hand when manipulating said handle assembly amid use of the surgical tool assembly, or by both said handle assembly and the user's hand when manipulating said handle assembly amid use of the surgical tool assembly;
wherein said handle assembly is translationally constrained along a z-axis relative to said frame assembly via said first intermediate rigid body, said second intermediate rigid body, and said third intermediate rigid body, said handle axis generally intersects said virtual center of rotation and said shaft axis generally intersects said virtual center of rotation.