Alfresa Pharma Corporation

Maruho Hatsujyo Kogyo Co., Ltd.

Noritoshi Yamaguchi

Yasuyuki Hitomi

Shinetsu Kudo

Yoshinori Kohara

Tomeo Konno

A bone-tying cable tightening device is disclosed which makes itself unusable after having been used a predetermined number of times. The device includes a grip portion, a rod-like member, a knot-supporting means at the tip, and a cable-holding means to grip and hold the two arms of a cable, and is provided with a sliding block mounted around the rod-like member and connected to a pulling means, and an operation lever, wherein the cable-holding means includes (a) a longitudinal through groove defined in the upper part of the sliding block, (b) a locking recess which extends at the rear end the through groove, either transversing the cross section of the through groove or containing the cross section of the through groove, and whose width in the cross section thereof widens in the rearward direction, and (c) a backward biased locking member which is provided movably back and forth behind the locking recess on the upper side of the sliding block and so made that its forward movement is blocked when it fits in the locking recess, and wherein the device further includes a pull-releasing means which can be operated to release the one-way detent means for the pulling means, and a release locking means to lock the one-way detent means in a released state after the pull-releasing means has been operated a predetermined number of times.

Tightening device for bone fastening cable

A bone-tying cable tightening device with improved easiness of handling of is disclosed. The device comprises a grip portion, a rod-like member extending forward, a knot supporter at the tip, a cable holder to grip and hold the tow arms together, and a sliding block mounted around the rod-like member and connected to a puller and an operation lever to drive the puller. The knot supporter supports two arms that can be hooked away from each other and laterally above the rod-like member, the cable holder is made up of a longitudinal through groove a locking recess which extends, at the end of the through groove, and a backward biased locking member which is provided movably back and forth behind the locking recess on the upper side of the sliding block made so that its forward movement is blocked when it fits in the locking recess.

Growing community of inventors

Osaka, Japan

Noritoshi Yamaguchi