Patent US5891148A successfully refreshed from Google Patents.
US5891148A
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US
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Inverse helical reamer
Assignee: Individual
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Filing: 1997-01-31
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Granted: 1999-04-06
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Expires: 2017-01-31
Abstract
Abstract This inverse reamer is formed of a tang extended by a helical shank. The edge turned towards the point is cutting and is wound in a direction contrary to the direction of rotation normally provided for operating the reamer.
Inventors
- 👤 Andre Georges Deckner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:08
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/16; A61B17/164; B; B23; B23D; B23D77/00; B23D77/12
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
142 words
Reamer formed of a tang extended by a shank having a substantially helical shape ending in a point on the opposite side to the tang and having an edge turned towards the point, wherein: the shank consists essentially of a single flexible blade wound into a helix about an imaginary axis, at least the part of the edge turned towards the point is cutting and the direction in which the helix is wound is opposite to the direction of rotation normally provided for operating the reamer, the point comprises at least one part having a continuously circular cross-section perpendicular to the imaginary axis, and the tang comprises a boss, of which at least part of, the transverse section is continuously and non-helical and said continuously circular part has a radius equal to or greater than the largest radius vector of the helix.
Claim 2
Dependent Claim
142 words
Reamer formed of a tang extended by a shank having a substantially helical shape ending in a point on the opposite side to the tang and having an edge turned towards the point, wherein: the shank consists essentially of a single flexible blade wound into a helix about an imaginary axis, at least the part of the edge turned towards the point is cutting and the direction in which the helix is wound is opposite to the direction of rotation normally provided for operating the reamer, the point comprises at least one part having a continuously circular cross-section perpendicular to the imaginary axis, and the tang comprises a boss, of which at least part of, the transverse section is continuously and non-helical and said continuously circular part has a radius equal to or greater than the largest radius vector of the helix.
Claim 3
Dependent Claim
14 words
Reamer according to claim 1, wherein the edge turned towards the point is cutting.
Claim 4
Dependent Claim
21 words
Reamer according to claim 2, wherein the imaginary enveloping surface of the shank widens out from the point towards the tang.
Claim 5
Dependent Claim
13 words
Reamer according to claim 3, wherein the enveloping surface is a truncated cone.
Claim 6
Dependent Claim
21 words
Reamer according to claim 1, wherein an imaginary enveloping surface of the shank widens out from the point towards the tang.
Claim 7
Dependent Claim
13 words
Reamer according to claim 5, wherein the enveloping surface is a truncated cone.
Claim 8
Dependent Claim
27 words
Reamer according to claim 1, wherein the tangent at any point of the cutting edge makes a constant angle in space with the axis of the shank.
Claim 9
Dependent Claim
17 words
Reamer according to claim 7, wherein the cutting edge of the shank describes a three-dimensional logarithmic spiral.
Claim 10
Dependent Claim
16 words
Reamer according to claim 1, wherein the helical pitch of the cutting edge is substantially constant.
Claim 11
Dependent Claim
11 words
Reamer according to claim 1, the point of which is rounded.
Claim 12
Dependent Claim
13 words
Reamer according to claim 1, wherein the enveloping surface is a truncated cone.
Claim 13
Dependent Claim
29 words
Reamer according to claim 1, wherein said single blade has an elongate ribbon shape disposed in spaced relationship about said imaginary axis in said helical shape along said shank.
Claim 14
Dependent Claim
52 words
Reamer according to claim 12, wherein said single blade ribbon shape includes a thickness dimension and a width dimension respectively extending between first and second pairs of opposed surfaces, said width dimension being substantially greater than said thickness dimension, and said opposed surfaces providing said blade with a generally rectangular cross section.
Claim 15
Dependent Claim
40 words
Reamer according to claim 13, wherein said single blade also includes a length dimension that is substantially greater than said width dimension, and said blade extends from said tang to said point along said length dimension in said helical shape.
Claim 16
Dependent Claim
36 words
Reamer according to claim 14, wherein said edge is formed by the intersection of one of each of said first and second surfaces along the length dimension of said blade between said tang and said point.
Claim 17
Dependent Claim
50 words
Reamer according to claim 1, wherein said single blade has an elongate ribbon shape including a width, a thickness and a length, said single blade being twisted in said helical shape along said blade length and extending in spaced relationship about said imaginary axis between said tang and said point.
Claim 18
Dependent Claim
38 words
Reamer according to claim 16, wherein said single blade includes first and second pairs of opposed surfaces respectively extending along said width and said thickness, and said opposed surfaces provide said blade with a generally rectangular cross section.
Claim 19
Dependent Claim
36 words
Reamer according to claim 17, wherein said edge is formed by the intersection of one of each of said first and second surfaces along the length of said blade extending between said tang and said point.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-04-05 | 2002-10-05 | 2003-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-04-05 | 2006-10-05 | 2007-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-04-05 | 2010-10-05 | 2011-04-06 | $7700.00 | Window Closed / Lapsed |