| US 7,527,635 B2 | ||
| Surgical knife | ||
| Tatsuya Saito, Seki (Japan); and Masahiro Endo, Seki (Japan) | ||
| Assigned to Kai R&D Center Co., Ltd., Gifu (Japan) | ||
| Filed on May 21, 2003, as Appl. No. 10/443,695. | ||
| Claims priority of application No. 2002-158153 (JP), filed on May 30, 2002. | ||
| Prior Publication US 2003/0225428 A1, Dec. 04, 2003 | ||
| Int. Cl. A61B 17/32 (2006.01) | ||
| U.S. Cl. 606—167 [606/172] | 1 Claim |
| 1. A surgical knife comprising,
a cutter blade including at least one sharp edge and lateral surfaces opposed to each other, between which lateral surfaces
the at least one sharp edge is arranged as seen in a direction perpendicular to a thickness direction of the cutter blade,
a holder including a longitudinal hole extending in a longitudinal direction of the holder and containing at least a part
of the cutter blade, and a guide groove extending in the longitudinal direction and in a thickness direction of the holder
to extend from the longitudinal hole and open to a front surface of the holder extending in a front surface direction parallel
to the lateral surfaces of the cutter blade, and
a slider connected to the cutter blade and movable along the guide groove between a front position for making the cutter blade
project from a front end of the holder and a back position for making the cutter blade be contained in the holder,
wherein the slider has a slider body holding thereon the cutter blade and being supported in the longitudinal hole, and an
operating part swingably coupled to the slider body to be movable with respect to the holder so that a first portion of the
operating part in the longitudinal hole is disengaged from the holder to release the slider from the holder and engaged with
the holder to fix the slider to the holder at each of the front and back positions, and the operating part has a second portion
protruding in the thickness direction from the first portion of the operating part in the longitudinal hole through the guide
groove to project from the front surface in the thickness direction and being movable in a radial direction in a plane of
the guide groove as seen in the thickness direction, and
wherein the slider has an elastic member arranged between the operating part and the slider body to elastically urge the first
portion of the operating part against the holder, and has a hinge arranged separately from the elastic member between the
slider body and the operating part to swingably couple the operating part to the slider body.
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