Endoscopic biopsy forceps
AssigneePENTAX Corporation
InventorsTeruo Ouchi, Masaru Nagamine
Life of this patent
Estimating the term…
Abstract
Endoscopic biopsy forceps that allow for smooth action of drive levers to ensure that forceps cups formed integral with the drive levers will positively open and close. Parallel grooves are formed in the drive levers in a direction perpendicular to the longitudinal axis of a support shaft and connecting members for coupling a manipulating wire and the drive levers are coupled to the drive levers within the parallel grooves.
Claims24
An integral assembly of a forceps cup and a drive lever, which is to be disposed at a distal end of endoscopic biopsy forceps, the integral assembly comprising:
- a cup part forming the forceps cup;
- a pair of side walls extending from the cup part substantially in parallel to each other to form the drive lever, the side walls being spaced from each other to define a groove therebetween;
- a bottom wall extending from the cup part, and connecting the side walls together to define a bottom of the groove;
- and
- a slot formed through the bottom wall, and located opposite from the cup part.
Endoscopic biopsy forceps comprising:
- a sheath;,
- two integral assemblies of forceps cups and drive levers that are provided at a distal end of the sheath;
- and
- a manipulating wire extending through the sheath which is moved back and forth along a longitudinal axis of the sheath so that the drive levers pivot about a support shaft and the forceps cups are driven to open and close like beaks,
- wherein parallel grooves are formed respectively in the drive levers in a direction perpendicular to a longitudinal axis of the support shaft;
- and
- wherein connecting members for coupling the manipulating wire and the drive levers are coupled respectively to the drive levers within the parallel grooves.
Endoscopic biopsy forceps comprising:
- a sheath;
- two integral assemblies of forceps cups and drive levers that are provided at a distal end of the sheath;
- and
- a manipulating wire extending through the sheath which is moved back and forth along a longitudinal axis so that the drive levers pivot about a support shaft and the forceps cups are driven to open and close like beaks,
- wherein wire-shaped members provided at a distal end of the manipulating wire are bent back to form loops, respectively,
- wherein wire engaging portions are formed at rear end portion of the drive levers by integral parts of the drive levers, respectively, and
- wherein the loops of the wire-shaped members are brought into rotatable engagement with the wire engaging portions of the drive levers, respectively.
Endoscopic biopsy forceps comprising:
- a sheath;
- two integral assemblies of forceps cups and drive levers that are formed by press working and which are provided at the distal end of the sheath;
- and
- a manipulating wire extending through the sheath which is moved back and forth along a longitudinal axis of the sheath so that the drive levers pivot about a support shaft and the forceps cups are driven to open and close like beaks,
- wherein a boundary between each forceps cup and the associated drive lever is formed in a generally U-shaped cross section.
Dependencies are inferred from the claim text.