Endoscopic instrument

Patent metadata

Field	Value
Publication number	US-9615846-B2
Application number	US-201314415277-A
Country	US
Kind code	B2
Filing date	Jul 1, 2013
Priority date	Jul 17, 2012
Publication date	Apr 11, 2017
Grant date	Apr 11, 2017

Abstract

An endoscopic instrument includes a shank ( 2 ) with an instrument head ( 9 ) arranged at the distal shank end ( 1 ) and includes a tool with two jaw parts ( 11, 12 ). The jaw parts ( 11, 12 ) are pivotable relative to one another and can be controlled from the proximal instrument end via a pull elements ( 5 - 8 ) led in the shank ( 2 ). At least one jaw part ( 11, 12 ) includes two curved disks ( 36, 37 ), on which the pull elements ( 5 - 8 ) engages in each case. Two curved disks ( 36, 37 ) of a different radial size are provided for each jaw part ( 11, 12 ). The radially larger curved disk is arranged closer to the longitudinal middle axis ( 14 ) of the tool than the radially smaller curved disk.

First claim

The invention claimed is:

1. An endoscopic instrument comprising:
a shank comprising a distal shank end;
an instrument head extending from said distal shank end, said instrument head comprising a tool, said tool comprising a longitudinal central axis, a first jaw part and a second jaw part, said first jaw part and said second jaw part being pivotable relative to each other;
a first member comprising a first disk peripheral edge and a first disk rotational axis, said first disk peripheral edge being located at a first radial distance from said first disk rotational axis;
a second disk comprising a second disk peripheral edge and a second disk rotational axis, said first disk and said second disk being connected to at least one of said first jaw part and second jaw part, said second disk rotational axis being aligned with said first disk rotational axis, said second disk peripheral edge being located at a second radial distance from said second disk rotational axis, said first radial distance being greater than said second radial distance, said first disk and said second member being associated with one of said first jaw part and said second jaw part for opening and closing said one of said first jaw part and said second jaw part, said first disk being located on one side of said one of said first jaw part and said second jaw part, said second disk being located on another side of said one of said first jaw part and said second jaw part, said first disk being located at a first distance from said longitudinal central axis, said second disk being located at a second distance from said longitudinal central axis, said first distance being less than said second distance; and
a plurality of pulling elements, at least a portion of each of said pulling elements extending in an interior of said shank, said first disk and said second disk being connected to one or more of said pulling elements, wherein actuation of said one or more pulling elements actuates said one of said first jaw part and said second jaw part.

2. An instrument according to claim 1 , further comprising:
a third disk comprising a third disk peripheral edge and a third disk rotational axis, said third disk peripheral edge being located at a third radial distance from said third disk rotational axis;
a fourth disk comprising a fourth disk peripheral edge and a fourth disk rotational axis, said third disk and said fourth disk being connected to at least another one of said first jaw part and said second jaw part, said fourth disk rotational axis being aligned with said first disk rotational axis, said second disk rotational axis, said third disk rotational axis and said fourth disk rotational axis, said fourth disk peripheral edge being located at a fourth radial distance from said fourth disk rotational axis, said third radial distance being greater than said fourth radial distance, said third disk and said fourth disk being associated with another one of said first jaw part and said second jaw part for opening and closing said another one of said first jaw part and said second jaw part, said third disk being located on one side of said another one of said first jaw part and said second jaw part, said fourth disk being located on another side of said another one of said first jaw part and said second jaw part, said third disk being located at a third distance from said longitudinal central axis, said fourth disk being located at a fourth distance from said longitudinal central axis, said third distance being less than said fourth distance.

3. An instrument according to claim 2 , wherein said first jaw part comprises a first jaw part first portion and a first jaw part second portion, said first jaw part first portion and said first jaw part second portion defining a first space, said second jaw part comprising a second jaw part first portion and a second jaw part second portion, said second jaw part first portion and said second jaw part second portion defining a second space, said first disk being located adjacent to one side of said first jaw part first portion, wherein another side of said first jaw part first portion defines at least a portion of said first space, said second disk being located adjacent to one side of said first jaw part second portion, wherein another side of said first jaw part second portion defines at least a portion of said first space, at least a portion of said first disk and at least a portion of said first jaw part first portion being arranged in said second space, wherein said first disk and said first jaw part first portion are located between said second jaw part first portion and said second jaw part second portion, said third disk being located adjacent to one side of said second jaw part first portion, wherein another side of said second jaw part first portion defines at least a portion of said second space, said fourth disk being located adjacent to one side of said second jaw part second portion, wherein another side of said second jaw part second portion defines at least a portion of said second space, at least a portion of said third disk and at least a portion of said second jaw part first portion being arranged in said first space, wherein said third disk and said second jaw part first portion are located between said first jaw part first portion and said first jaw part second portion.

Assignees

• Wolf Gmbh Richard

Inventors

• Prestel Stephan

Classifications

• A61B2017/2939

  Details of linkages or pivot points · CPC title

• A61B2017/2938

  Independently actuatable jaw members, e.g. two actuating rods · CPC title

• A61B34/30

  Surgical robots · CPC title

• A61B2017/2929

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

• A61B17/29 Primary

  Forceps for use in minimally invasive surgery · CPC title