1. A bone plate for attachment to bone across discontinuities comprising an elongated span having a first end and a second end, a first bracket on said first end and a second bracket on said second end, said first and said second bracket each having at least one aperture adapted to receive a bone fastener, said first bracket and said second bracket each having a nonlinear, elongated slot therein, at least one wedge shoe disposed in said nonlinear, elongated slot, a rotatable cam disposed in said nonlinear, elongated slot and having a cam surface in contact with said wedge shoe whereby rotation of said cam slides said wedge shoe partially into said aperture.
2. The bone plate of claim 1 further comprising a second aperture in said first and said second bracket, said nonlinear, elongated slot extending between said one and said second apertures, said cam bore located in said nonlinear, elongated slot between said one and said second apertures, a second wedge shoe in said nonlinear, elongated slot between said cam and said second aperture whereby rotation of said cam slides said wedge shoe and said second wedge shoe partially into said one and said second apertures, respectively.
3. The bone plate of claim 1 comprising a countersunk bore surrounding said aperture, said countersunk bore having a sidewall, said wedge shoe extending through a portion of said sidewall.
4. The bone plate of claim 2 comprising a countersunk bore surrounding said one and said second aperture, said bores each having sidewall, said wedge shoes extending through a portion of said sidewall.
5. The bone plate of claim 1 wherein said wedge shoe is provided with a spring means to maintain said shoe in contact with a head of a bone screw positioned in said aperture after said cam moves said shoe into said aperture.
6. The bone plate of claim 2 wherein said wedge shoe and said second wedge shoe are provided with a spring means to maintain said shoes in contact with a head of a bone screw positioned in said aperture after said cam moves said shoes into said apertures.
7. The bone plate of claim 1 wherein said wedge shoe is provided with an indicator which indicate that said wedge shoe has been slid sufficiently into said aperture to engage a head of a bone screw positioned in said aperture.
8. The bone plate of claim 2 wherein said wedge shoe and said second wedge shoe are provided with an indicator which indicate that said wedge shoe and said second wedge shoe have been slid sufficiently into said apertures to engage a head of a bone screw positioned in said aperture.
9. The bone plate of claim 7 wherein the indicator comprises a groove on said wedge shoe and said second and a protrusion on a sidewall of said nonlinear, elongated slot.
10. The bone plate of claim 8 wherein the indicator comprises a groove on said wedge shoe and said second and a protrusion on a sidewall of said nonlinear, elongated slot.
11. The bone plate of claim 1 wherein said wedge shoe includes an end constructed and arranged to engage a bone fastener positioned in said aperture.
12. The bone plate of claim 2 wherein said wedge shoe and said second wedge shoe include an end constructed and arranged to engage a bone fastener positioned in said aperture.
13. The bone plate of claim 11 wherein said wedge shoe includes an other end constructed and arranged to lock said cam in a position subsequent to a cam lobe surface engaging said wedge shoe.
14. The bone plate of claim 12 wherein said wedge shoe and said second wedge shoe include an other end constructed and arranged to lock said cam in a position subsequent to a cam lobe surface engaging said wedge shoes.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. An insert comprising:
a clamping member; and
a parallelogram shaped body that is detachably mounted by said clamping member on a tip mounting face of a holder, wherein
two or more concave grooves are formed like parallel stripes on said tip mounting face of said holder;
two or more convex lines are formed on an abdominal face of said parallelogram shaped body to be fitted in said concave grooves of said holder;
said parallelogram shaped body is clamped by said clamping member to said holder so that the convex lines are fitted in the concave grooves on said tip mounting face;
said clamping member fixes said parallelogram shaped body to said holder by tightening a clamp screw through a screw insertion hole of said parallelogram shaped body into a female thread hole on said tip mounting face; and
a flat convex line missing part is provided in a region of said parallelogram shaped body which includes a periphery of an opening edge of said screw insertion hole and is opposed to said tip mounting face of said holder when said parallelogram shaped body is fixed to said holder, and wherein said tip mounting face and said flat convex line missing part are out of contact at least before tightening said clamp screw, and
wherein said flat convex line missing part is flush with a base of said convex lines.
2. The insert according to claim 1, wherein
the number of said convex lines is from three to five.
3. The insert according to claim 1, wherein
said one screw insertion hole is formed in a center area of said parallelogram shaped body, and
said parallelogram shaped body is tightened by one clamp screw.
4. The insert according to claim 1, further comprising:
a step portion formed on an abdominal face of said parallelogram shaped body in a direction transverse to said convex lines, wherein
said parallelogram shaped body is positioned in such a manner that said step portion is engaged with an engagement step portion provided on said holder.
5. The insert according to claim 1, wherein
said insert is used for cutting or grooving work.
6. The insert according to claim 1, wherein
a dimple groove for cutting work is provided on a knife edge rake face of said parallelogram shaped body.
7. A holder comprising:
a clamping member; and
a tip mounting face,
said holder is capable of holding an insert that is detachably mounted by said clamping member on said tip mounting face thereof, wherein
two or more concave grooves are formed as parallel stripes on an abdominal face of said insert;
two or more convex lines are formed on said tip mounting face of said holder to be fitted in said concave grooves of said insert, wherein said insert is clamped by said clamping member in a state where said concave grooves of said insert are fitted in said convex lines on said tip mounting face of said holder;
said clamping member fixes said insert to said holder by tightening a clamp screw through a screw insertion hole of said insert into a female thread hole on said tip mounting face of said holder; and
a flat convex line missing part is provided in a region that includes a periphery of an opening edge of said female thread hole and opposed to said insert, wherein said insert and said convex line missing part are out of contact at least before tightening the clamp screw,
wherein said insert has a cutting edge, and
wherein said flat convex line missing part is flush with a base of said convex lines.
8. The holder according to claim 7, wherein
the number of said convex lines is from three to five.
9. The holder according to claim 7, wherein
one female thread hole is formed in the center of said tip mounting face, and
said insert is tightened by one clamp screw.
10. The holder according to claim 7, wherein
an engagement step portion is formed in a direction traversing said convex lines, and
said insert is fixed to said holder so that a step portion provided on an abdominal face of said insert is engaged in said engagement step portion of said holder.
11. The holder according to claim 7, wherein said insert is used for the cutting or grooving work.
12. The insert according to claim 1, wherein said insert is a part of a cutting tool,
and said insert is held in said holder.
13. The holder according to claim 7, wherein said holder is a part of a cutting tool
and insert is held in said holder.