Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
185 words
1 . A device for the distraction of bones or bone segments comprising: an anchoring screw having a longitudinal axis, a screw tip, a screw end with means for rotatably driving the anchoring screw, a threaded shank which adjoins the screw tip and has a screw thread, and a screw shank adjoining the screw end; and a distraction sleeve axially displaceable on the screw shank including a rear end, a front end, a through-bore extending coaxially therebetween, an external thread adjoining the front end, and coupling means formed in the rear end for receiving a driving tool, wherein the anchoring screw comprises a collar positioned between the threaded shank and the screw shank that radially projects at least from the screw shank and which serves as an axial stop for the front end of the distraction sleeve when the distraction sleeve is positioned over the screw shank, the through-bore has a boring section with an enlarged cross-section which adjoins the rear end, said boring section being provided with a lateral surface; and a seal ring coaxially arranged between the lateral surface and the screw shank.
Claim 2
Dependent Claim
185 words
1 . A device for the distraction of bones or bone segments comprising: an anchoring screw having a longitudinal axis, a screw tip, a screw end with means for rotatably driving the anchoring screw, a threaded shank which adjoins the screw tip and has a screw thread, and a screw shank adjoining the screw end; and a distraction sleeve axially displaceable on the screw shank including a rear end, a front end, a through-bore extending coaxially therebetween, an external thread adjoining the front end, and coupling means formed in the rear end for receiving a driving tool, wherein the anchoring screw comprises a collar positioned between the threaded shank and the screw shank that radially projects at least from the screw shank and which serves as an axial stop for the front end of the distraction sleeve when the distraction sleeve is positioned over the screw shank, the through-bore has a boring section with an enlarged cross-section which adjoins the rear end, said boring section being provided with a lateral surface; and a seal ring coaxially arranged between the lateral surface and the screw shank.
Claim 3
Dependent Claim
20 words
2 . The device of claim 1 , wherein the collar comprises a cone which leads to the screw shank.
Claim 4
Dependent Claim
23 words
3 . The device of claim 1 , wherein the collar comprises a spherically convex, tapered portion which leads to the screw shank.
Claim 5
Dependent Claim
21 words
4 . The device of claim 3 , wherein the boring section has an inner cone which leads to the through-bore.
Claim 6
Dependent Claim
34 words
5 . The device of claim 4 , further comprising a cover screw, and the screw end provided with a bore having an internal screw thread into which said cover screw may be screwed.
Claim 7
Dependent Claim
14 words
6 . The device of claim 1 , wherein the screw thread is self-tapping.
Claim 8
Dependent Claim
17 words
7 . The device of claim 1 , wherein the screw thread has an asymmetrical thread profile.
Claim 9
Dependent Claim
35 words
8 . The device of claim 7 , wherein the screw thread includes flanks directed towards the screw tip that form an angle of between 80 and 90 degrees with respect to the longitudinal axis.
Claim 10
Dependent Claim
17 words
9 . The device of claim 8 , wherein the external thread has an asymmetrical thread profile.
Claim 11
Dependent Claim
35 words
10 . The device of claim 9 , wherein the external thread includes flanks directed towards the rear end that form an angle of between 80 and 90 degrees with respect to the longitudinal axis.
Claim 12
Dependent Claim
20 words
11 . The device of claim 10 , wherein the thread profile of the external thread displays flattened, threaded tips.
Claim 13
Dependent Claim
25 words
12 . The device of claim 11 , wherein the means for rotatably driving the anchoring screw do not radially protrude from the screw shank.