Medical instrument system comprising a surgical tool

Patent metadata

Field	Value
Publication number	US-12508036-B2
Application number	US-202018027446-A
Country	US
Kind code	B2
Filing date	Sep 22, 2020
Priority date	Sep 22, 2020
Publication date	Dec 30, 2025
Grant date	Dec 30, 2025

Abstract

A medical instrument system includes a handpiece and a surgical tool. The handpiece has a housing in which a drive and/or a gearing mechanism is accommodated and which preferably has a housing part which is or can be attached to the housing. The surgical tool is supported on the housing and/or the housing part by a plurality of rotary bearings. The surgical tool is or can be coupled to the drive and/or gearing mechanism for conjoint rotation and in an axially fixed manner so as to transmit a torque from the drive and/or gearing mechanism to the tool. A first of the rotary bearings at a distal end portion of the tool is connected to the tool to form a unit. A second of the rotary bearings is accommodated in the housing or the housing part, proximally to the first rotary bearing, so as to be stationary.

First claim

The invention claimed is:

1 . A medical instrument system comprising:
a handpiece having a housing in which a drive and/or a gearing mechanism is housed and having a housing part connected or connectable to the housing; a surgical tool supported via a plurality of pivot bearings against the housing and/or against the housing part and which is coupled or is coupleable to the drive and/or the gearing mechanism in a rotationally and axially fixed manner in order to transmit a torque of the drive and/or the gearing mechanism to the surgical tool, the surgical tool comprising a tool shaft, the plurality of pivot bearings comprising a first pivot bearing at a distal end portion of the surgical tool and a second pivot bearing located proximal to the first pivot bearing, the first pivot bearing being connected to the surgical tool to form a unit, and the second pivot bearing being housed in a fixed position in the housing or the housing part, such that the second pivot bearing remains in the housing or the housing part even after uncoupling of the surgical tool from the drive and/or from the gearing mechanism.

2 . The medical instrument system according to claim 1 , wherein the first pivot bearing is formed via multiple pivot bearings of the plurality of pivot bearings that cooperate to form a composite and/or single-row or multi-row bearing.

3 . The medical instrument system according to claim 1 , wherein the second pivot bearing is formed via multiple pivot bearings of the plurality of pivot bearings that cooperate to form a composite and/or single-row or multi-row bearing.

4 . The medical instrument system according to claim 1 , wherein the first pivot bearing is formed separately from the tool shaft, so that the tool shaft and the first pivot bearing are connected to form a detachable unit.

5 . The medical instrument system according to claim 1 , wherein the first pivot bearing is formed integrally with the tool shaft, so that the tool shaft and the first pivot bearing are connected to form an inseparable unit.

6 . The medical instrument system according to claim 5 , wherein an inner bearing portion of the first pivot bearing is formed in one piece of material with the surgical tool.

7 . The medical instrument system according to claim 1 , wherein a circumferential flange portion is formed on the tool shaft and the first pivot bearing is axially fixed to the circumferential flange portion.

8 . The medical instrument system according to claim 1 , further comprising a cover sleeve configured to selectively attach at a distal end portion of the housing or the housing part with a portion of the surgical tool axially located between the cover sleeve and the housing or the housing part, in order to axially hold the first pivot bearing when surgical tool is coupled to the drive and/or the gearing mechanism.

9 . The medical instrument system according to claim 1 , further comprising a circumferential wall axially extending between the first pivot bearing and the second pivot bearing and contacting an outer ring of the first pivot bearing and an outer ring of the second pivot bearing when the surgical tool is coupled to the drive and/or the gearing mechanism, to thereby axially supporting the first pivot bearing and the second pivot bearing.

10 . A medical instrument system comprising:
a surgical tool comprising:
a tool shaft extending from a proximal shaft end to a distal shaft end,
an effector at the distal shaft end,
a first bearing fixed to the tool shaft between the distal shaft end and the proximal shaft end, and
a coupling structure at the proximal shaft end;
a handpiece comprising:
a housing,
a drive unit located in the housing, and
a second bearing fixed to the housing; and
wherein the surgical tool is repositionable between:
a connected configuration in which the first bearing is positioned in rotatably supporting contact between the tool shaft and the housing, the second bearing is positioned in rotatably supporting contact between the housing and the tool shaft, and the coupling structure is rotationally fixed to the drive unit, and
a disconnected configuration in which the surgical tool is separate from the handpiece,
wherein the surgical tool is configured to be repositioned between the connected configuration and the disconnected configuration as a single integral unit while the handpiece remains as a single integral unit.

11 . The medical instrument system according to claim 10 , wherein the drive unit comprises at least one of a motor, a gear mechanism, or a torque transmission cable.

12 . The medical instrument system according to claim 10 , wherein the housing comprises a plurality of connected housing parts.

13 . The medical instrument system according to claim 12 , wherein the housing comprises:
a first housing part containing at least a portion of the drive unit; and a second housing part extending away from the first housing part along an axis to a distal end spaced from the first housing part, wherein an outer ring of the first bearing is positioned in rotatably supporting contact between the tool shaft and the second housing part when the surgical tool is in the connected configuration.

14 . The medical instrument according to claim 13 , wherein the second housing part comprises a circumferential wall that contacts the outer ring of the first bearing and an outer ring of the second bearing and holds the outer ring of the first pivot bearing and the outer ring of the second pivot bearing at a fixed spaced apart distance along the axis when the surgical tool is in the connected configuration.

15 . The medical instrument according to claim 13 , further comprising a cover sleeve configured to attach to the distal end of the second housing part with the first bearing captured along the axis between cover sleeve and the first housing portion when the surgical tool is in the connected configuration.

16 . The medical instrument according to claim 10 , wherein the second bearing is fixed to the housing by an outer ring of the second bearing, and to a distal end of the drive unit by an inner ring of the second bearing.

Assignees

• Aesculap Ag

Inventors

• Buerk André
• Hoegerle Roland-Alois
• Pfister Ralf

Classifications

• A61B2017/2929

  with a head rotatable about the longitudinal axis of the shaft · CPC title

• A61B2017/00477

  Coupling (A61B2017/0046 takes precedence) · CPC title

• A61B2017/00473

  Distal part, e.g. tip or head (A61B2017/00464 takes precedence) · CPC title

• A61B17/1631

  Special drive shafts, e.g. flexible shafts (A61B17/1642, A61B17/164 take precedence) · CPC title

• A61C1/144

  constricting the operating tool, e.g. chuck · CPC title