# US 11,026,703 B2 · Method for the production of a reamer

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- Number: US 11,026,703 B2
- Document ID: US11026703B2
- Status: Granted
- Kind: B2
- Application number: 16/310,009
- Filed: 2017-07-11
- Published: 2019-06-06
- Granted: 2021-06-08
- Earliest claimed: 2016-07-12
- Assignees: Deuxventorio SàRl
- Applicants: Deuxventorio Sàrl
- Inventors: Thomas Gradel
- Web page: https://patentgrep.com/patent/US11026703B2

## CPC

- A61B 17/1666: {for the acetabulum}
- B21D 31/02: Stabbing or piercing, e.g. for making sieves (dimpling B21D22/04; perforating by punching B21D28/24)
- B23C 5/006: {Details of the milling cutter body}
- B23C 5/02: characterised by the shape of the cutter
- A61B 2017/00526: {Methods of manufacturing}
- A61B 2017/1602: {Mills}
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)
- B21D: WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL (working or processing of wire B21F)
- B23C: MILLING (broaching B23D; broach-milling in making gears B23F; arrangement for copying or controlling B23Q)

## Abstract

A method for the production of a reamer, such as a burr for milling a patient's acetabular cavity, including a substantially hemispherical, hollow cutting body with a perforated wall. The method includes a step of forming at least one tooth by stamping the wall, during which an area of the thinned portion of the wall, adjacent to a hole, is pressed between a punch and an anvil.

## Claims

### Claim 1

A method for producing a reamer, such as a milling cutter intended to mill the acetabular cavity of a patient, the milling cutter comprising a substantially hemispherical hollow cutter body with a perforated wall, said method comprising the steps of:
a) providing a press comprising a stamp and an anvil;
b) providing a flat metal blank designed to constitute the perforated wall;
c) stamping a hole in the metal blank;
d) forming at least one tooth by stamping the metal blank by means of a punch, and plastically deforming a portion of the metal blank extending radially from and away from the hole previously stamped in the wall;
wherein:
steps c) and d) are distinct, and wherein step d) is performed after step c);
during step d), a zone of the deformed portion of the metal blank, adjacent to the hole, is plastically deformed, thinned, and pressed by the punch against the anvil to form a cutting edge.

### Claim 2 (depends on 1)

The production method as claimed in claim 1, wherein:
the punch comprises a free end with a set pressing surface,
in the step of forming of the tooth, a generatrix (I-I) of the pressing surface is oblique relative to a plane (P1) defined by the orifice of the hole.

### Claim 3 (depends on 2)

The production method as claimed in claim 2, wherein:
the anvil comprises a set pressing surface whose generatrix (II-II) is oblique relative to the plane (P1) defined by the orifice of the hole,
in the forming of the tooth, the angle (A2) between the generatrix (II-II) of the pressing surface of the anvil and the plane (P1) defined by the orifice of the hole is smaller than the angle (A1) between the generatrix (I-I) of the pressing surface of the punch and the plane (P1) defined by the orifice of the hole, preferably by approximately 2 degrees.

### Claim 4 (depends on 1)

The production method as claimed in claim 1, wherein the flat metal blank has a thickness (E) of between approximately 0.4 mm and approximately 1 mm.

### Claim 5 (depends on 1)

The production method as claimed in claim 1, wherein, after the forming of the tooth, the flat blank is cut to obtain a plurality of perforated and toothed petals extending radially from a central zone from which the petals extend to a free end, and separated from one another by radial lateral spaces.

### Claim 6 (depends on 5)

The production method as claimed in claim 5, wherein, after the cutting of the flat blank to form the petals:
the flat blank is shaped as a hemisphere,
the free ends of the petals are added and fixed onto an at least partially circular base body.

### Claim 7 (depends on 1)

The production method as claimed in claim 1, wherein the cutter body is made of stainless steel, preferably of 304 L or 316 L grade stainless steel.