EP0508710A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Surgical reamer
Assignee: Linvatec Corp
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Filing: 1992-04-07
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Granted: —
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Expires: 2012-04-07
Abstract
Abstract A surgical bone reamer 10 includes a rotatable, elongated shank 12 having a proximal end 14, a distal end 16 and a longitudinal axis, and a reaming head 18 mounted on the distal end 16. A plurality of equally spaced walls 34 are radially disposed on the reaming head around the longitudinal axis, and tip edges 40 for penetrating bone are defined on the radial walls 34 to be disposed angularly with the longitudinal axis. Reaming edges 42 joined to the tip edges 40 extend longitudinally from the tip edges 40 in the proximal direction parallel to and an equal radial distance from the longitudinal axis for reaming a cylindrical tunnel when the reaming head 18 is rotated in bone. Tapered flutes 48 disposed angularly between the tip edges 40 and the radial walls 34 permit bone to be evacuated through the reaming head 18 when forming a tunnel in bone.
Inventors
- 👤 Robert Davis
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-25 11:20
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/16; A61B17/1613; A61B17/1615; B; B23; B23B; B23B31/00; B23B31/005; A61B17/1662; A61B17/1675; A61B2017/0023; A61B90/00; A61B90/06; A61B2090/062; B23B2231/00; B23B2231/02; B23B2231/0208; B23B2231/0256; B23B2260/00; B23B2260/088; Y; Y10; Y10T; Y10T408/00; Y10T408/89; Y10T408/895
Claims Analysis
Total Claims: 35
Claim 1
Independent Claim
93 words
A surgical bone reamer comprising an elongated rotatable body having a proximal end, a distal end and a longitudinal axis; tip edge means on said distal end positioned around said axis and disposed angularly with a plane normal to said axis for penetrating bone; reaming edge means joined to said tip edge means extending longitudinally parallel to said axis for forming a tunnel when said body is rotated in bone; and flute means disposed between said tip edge means for evacuating bone through said flute means when said body is rotated in bone.
Claim 2
Dependent Claim
25 words
A surgical bone reamer as recited in claim 1 wherein said flute means include flute surfaces angularly disposed with a plane normal to said axis.
Claim 3
Dependent Claim
38 words
A surgical bone reamer as recited in claim 2 wherein the angle defined by said flute surfaces with a plane normal to said axis is greater than the angle defined by said tip edge means with said plane.
Claim 4
Dependent Claim
39 words
A surgical bone reamer as recited in claim 3 further including wall means positioned radially at equally spaced locations around said axis and wherein said tip edge means and said reaming edge means are defined on said wall means.
Claim 5
Dependent Claim
38 words
A surgical bone reamer as recited in claim 4 further including tip surface means joined to said wall means along said tip edge means and reaming surface means joined to said wall means along said reaming edge means.
Claim 6
Dependent Claim
24 words
A surgical bone reamer as recited in claim 5 wherein said flute surfaces are joined to said tip surface means and said wall means.
Claim 7
Dependent Claim
24 words
A surgical bone reamer as recited in claim 6 wherein said flute surfaces taper inwardly from said tip surface means to said wall means.
Claim 8
Dependent Claim
32 words
A surgical bone reamer as recited in claim 5, 6 or 7 further including connecting surfaces joining said reaming surface means, said wall means, said tip surface means and said flute surfaces.
Claim 9
Dependent Claim
35 words
A surgical bone reamer as recited in claim 8 wherein said connecting surfaces are joined to said wall means at connecting edges extending longitudinally parallel to said axis radially inwardly of said reaming edge means.
Claim 10
Dependent Claim
27 words
A surgical bone reamer as recited in claim 9 wherein said connecting edges extend longitudinally from a medial point on said wall means toward said proximal end.
Claim 11
Dependent Claim
29 words
A surgical bone reamer as recited in claim 10 wherein said connecting surfaces are angularly joined to said flute surfaces at peaks positioned medially on said tip surface means.
Claim 12
Dependent Claim
25 words
A surgical bone reamer as recited in any preceding claim wherein said tip edge means are positioned at approximately 90° spaced locations around said axis.
Claim 13
Dependent Claim
28 words
A surgical bone reamer as recited in any preceding claim wherein said tip edge means define an angle of approximately 31° with a plane normal to said axis.
Claim 14
Dependent Claim
33 words
A surgical bone reamer as recited in claim 2 or any subsequent claim when dependent thereon wherein said flute surfaces define an angle of approximately 60° with a plane normal to said axis.
Claim 15
Dependent Claim
86 words
A surgical bone reamer comprising an elongated, rotatable body having a proximal end, a distal end and a longitudinal axis; wall means on said distal end positioned radially at equally spaced locations around said axis; tip surface means angularly joined to said wall means and disposed angularly with said axis for penetrating bone; and reaming surface means angularly joined to said wall means extending longitudinally from said tip surface means parallel to said axis for reaming a cylindrical tunnel when said body is rotated in bone.
Claim 16
Dependent Claim
49 words
A surgical bone reamer as recited in claim 15 wherein said tip surface means and said wall means define tip edges and said tip surface means is joined to said wall means at a first acute angle with a plane normal to said wall means along said tip edges.
Claim 17
Dependent Claim
49 words
A surgical bone reamer as recited in claim 16 wherein said reaming surface means and said wall means define reaming edges and said reaming surface means is joined to said wall means at a second acute angle with a plane normal to said wall means along said reaming edges.
Claim 18
Dependent Claim
17 words
A surgical bone reamer as recited in claim 17 wherein said first acute angle is approximately 10°.
Claim 19
Dependent Claim
17 words
A surgical bone reamer as recited in claim 18 wherein said second acute angle is approximately 10°.
Claim 20
Dependent Claim
26 words
A surgical bone reamer as recited in any one of claims 15-19 wherein said wall means are positioned at approximately 90° spaced locations around said axis.
Claim 21
Dependent Claim
36 words
A surgical bone reamer as recited in claim 16 or any subsequent claim when dependent thereon wherein said tip edges on said wall means positioned at approximately 180° spaced locations define an angle of approximately 118°.
Claim 22
Dependent Claim
120 words
A surgical bone reamer comprising an elongated, rotatable body having a proximal end a distal end and a central longitudinal bore having a longitudinal axis; wall means on said distal end positioned radially around said bore and having tip edge means disposed angularly with a plane normal to said axis for penetrating bone; reaming edge means on said wall means joined to said tip edge means extending longitudinally toward said proximal end an equal radial distance from said axis for forming a cylindrical tunnel when said body is rotated in bone; and notch means disposed between said wall means adjacent said bore for defining cusp means on said wall means for initially entering bone when said body is rotated therein.
Claim 23
Dependent Claim
35 words
A surgical bone reamer as recited in claim 22 wherein said body includes a cylindrical shank and a reaming head mounted on said shank, and wherein said wall means are defined on said reaming head.
Claim 24
Dependent Claim
26 words
A surgical bone reamer as recited in claim 23 wherein said reaming head includes an end wall having a recess receiving an end of said shank.
Claim 25
Dependent Claim
36 words
A surgical bone reamer as recited in claim 24 wherein said bore includes a first bore section in said shank and a second bore section in said reaming head coaxially aligned with said first bore section.
Claim 26
Dependent Claim
24 words
A surgical bone reamer as recited in claim 25 further including relief surfaces angularly joined to said reaming edge means and said end wall.
Claim 27
Dependent Claim
22 words
A surgical bone reamer as recited in claim 26 wherein said first bore section is diametrically larger than said second bore section.
Claim 28
Dependent Claim
41 words
A surgical bone reamer as recited in claim 27 further including tip surface means joined to said wall means along said tip edge means, and wherein said notch means define curved edges between said tip surface means and said wall means.
Claim 29
Dependent Claim
25 words
A surgical bone reamer as recited in claim 28 wherein said curved edges are joined to said wall means proximally spaced from said cusp means.
Claim 30
Dependent Claim
23 words
A surgical bone reamer as recited in claim 29 wherein said relief surfaces define an angle of approximately 45° with said longitudinal axis.
Claim 31
Dependent Claim
28 words
A surgical bone reamer as recited in claim 30 wherein the length of said reaming head from said end wall to said cusp means is approximately .33 inches.
Claim 32
Dependent Claim
35 words
A surgical bone reamer as recited in any preceding claim further including a plurality of flats on said body extending longitudinally from said proximal end toward said distal end for engaging a rotatable drive tool.
Claim 33
Dependent Claim
30 words
A surgical bone reamer as recited in claim 32 further including an aperture positioned between said flats to receive a detent on a drive tool for securing said body therein.
Claim 34
Dependent Claim
26 words
A surgical bone reamer as recited in any preceding claim further including means on said body for indicating the depth of said reaming head in bone.
Claim 35
Dependent Claim
27 words
A surgical bone reamer as recited in claim 34 wherein said indicating means includes a plurality of circumferential grooves on said body at longitudinally spaced locations therealong.
References Cited (Backward Citations)
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